Moved selection handling code to CNodeSelection, implemented instance spawning, half-implemented instance deleting (this build is buggy/crash prone)

src/Common/Log.cpp

@@ -58,6 +58,8 @@ void Write(const TString& rkMessage)
         fprintf(gpLogFile, "[%08.3f] %s\n", Time, *rkMessage);
         fflush(gpLogFile);
     }
+
+    std::cout << rkMessage << "\n";
 }
 
 void Error(const TString& rkMessage)
@@ -65,7 +67,6 @@ void Error(const TString& rkMessage)
     TString FullMessage = "ERROR: " + rkMessage;
     Write(FullMessage);
     gErrorLog.push_back(FullMessage);
-    std::cout << FullMessage << "\n";
 }
 
 void Warning(const TString& rkMessage)
@@ -73,7 +74,6 @@ void Warning(const TString& rkMessage)
     TString FullMessage = "Warning: " + rkMessage;
     Write(FullMessage);
     gErrorLog.push_back(FullMessage);
-    std::cout << FullMessage << "\n";
 }
 
 void FileWrite(const TString& rkFilename, const TString& rkMessage)

src/Core/CAreaAttributes.h

@@ -15,6 +15,8 @@ public:
     bool IsLayerEnabled() const;
     bool IsSkyEnabled() const;
     CModel* SkyModel() const;
+
+    inline CScriptObject* Instance() const { return mpObj; }
 };
 
 #endif // CAREAATTRIBUTES_H

src/Core/Resource/CGameArea.cpp

@@ -2,23 +2,25 @@
 #include "Core/Resource/Script/CScriptLayer.h"
 #include "Core/Render/CRenderer.h"
 
-CGameArea::CGameArea() : CResource()
+CGameArea::CGameArea()
+    : CResource()
+    , mWorldIndex(-1)
+    , mVertexCount(0)
+    , mTriangleCount(0)
+    , mTerrainMerged(false)
+    , mOriginalWorldMeshCount(0)
+    , mUsesCompression(false)
+    , mMaterialSet(nullptr)
+    , mpGeneratorLayer(nullptr)
+    , mpCollision(nullptr)
 {
-    mVertexCount = 0;
-    mTriangleCount = 0;
-    mTerrainMerged = false;
-    mOriginalWorldMeshCount = 0;
-    mUsesCompression = false;
-    mMaterialSet = nullptr;
-    mpGeneratorLayer = nullptr;
-    mCollision = nullptr;
 }
 
 CGameArea::~CGameArea()
 {
     ClearTerrain();
 
-    delete mCollision;
+    delete mpCollision;
     delete mpGeneratorLayer;
 
     for (u32 iSCLY = 0; iSCLY < mScriptLayers.size(); iSCLY++)
@@ -108,85 +110,109 @@ void CGameArea::ClearScriptLayers()
     mpGeneratorLayer = nullptr;
 }
 
-EGame CGameArea::Version()
+u32 CGameArea::TotalInstanceCount() const
 {
-    return mVersion;
+    u32 Num = 0;
+
+    for (u32 iLyr = 0; iLyr < mScriptLayers.size(); iLyr++)
+        Num += mScriptLayers[iLyr]->NumInstances();
+
+    return Num;
 }
 
-CTransform4f CGameArea::GetTransform()
-{
-    return mTransform;
-}
-
-u32 CGameArea::GetTerrainModelCount()
-{
-    return mTerrainModels.size();
-}
-
-u32 CGameArea::GetStaticModelCount()
-{
-    return mStaticTerrainModels.size();
-}
-
-CModel* CGameArea::GetTerrainModel(u32 mdl)
-{
-    return mTerrainModels[mdl];
-}
-
-CStaticModel* CGameArea::GetStaticModel(u32 mdl)
-{
-    return mStaticTerrainModels[mdl];
-}
-
-CCollisionMeshGroup* CGameArea::GetCollision()
-{
-    return mCollision;
-}
-
-u32 CGameArea::GetScriptLayerCount()
-{
-    return mScriptLayers.size();
-}
-
-CScriptLayer* CGameArea::GetScriptLayer(u32 index)
-{
-    return mScriptLayers[index];
-}
-
-CScriptLayer* CGameArea::GetGeneratorLayer()
-{
-    return mpGeneratorLayer;
-}
-
-CScriptObject* CGameArea::GetInstanceByID(u32 InstanceID)
+CScriptObject* CGameArea::InstanceByID(u32 InstanceID)
 {
     auto it = mObjectMap.find(InstanceID);
     if (it != mObjectMap.end()) return it->second;
     else return nullptr;
 }
 
-u32 CGameArea::GetLightLayerCount()
+
+CScriptObject* CGameArea::SpawnInstance(CScriptTemplate *pTemplate,
+                                        CScriptLayer *pLayer,
+                                        const CVector3f& rkPosition /*= CVector3f::skZero*/,
+                                        const CQuaternion& rkRotation /*= CQuaternion::skIdentity*/,
+                                        const CVector3f& rkScale /*= CVector3f::skOne*/,
+                                        u32 SuggestedID /*= -1*/,
+                                        u32 SuggestedLayerIndex /*= -1*/ )
 {
-    return mLightLayers.size();
+    // Verify we can fit another instance in this area.
+    u32 NumInstances = TotalInstanceCount();
+
+    if (NumInstances >= 0xFFFF)
+    {
+        Log::Error("Unable to spawn a new script instance; too many instances in area (" + TString::FromInt32(NumInstances, 0, 10) + ")");
+        return nullptr;
+    }
+
+    // Check whether the suggested instance ID is valid
+    u32 InstanceID = SuggestedID;
+
+    if (InstanceID != -1)
+    {
+        if (mObjectMap.find(InstanceID) == mObjectMap.end())
+            InstanceID = -1;
+    }
+
+    // If not valid (or if there's no suggested ID) then determine a new instance ID
+    if (InstanceID == -1)
+    {
+        // Determine layer index
+        u32 LayerIndex = -1;
+
+        for (u32 iLyr = 0; iLyr < mScriptLayers.size(); iLyr++)
+        {
+            if (mScriptLayers[iLyr] == pLayer)
+            {
+                LayerIndex = iLyr;
+                break;
+            }
+        }
+
+        if (LayerIndex == -1)
+        {
+            Log::Error("Unable to spawn a new script instance; invalid script layer passed in");
+            return nullptr;
+        }
+
+        // Look for a valid instance ID
+        InstanceID = (LayerIndex << 26) | (mWorldIndex << 16) | 1;
+
+        while (true)
+        {
+            auto it = mObjectMap.find(InstanceID);
+
+            if (it == mObjectMap.end())
+                break;
+            else
+                InstanceID++;
+        }
+    }
+
+    // Spawn instance
+    CScriptObject *pInstance = new CScriptObject(InstanceID, this, pLayer, pTemplate);
+    pInstance->EvaluateProperties();
+    pInstance->SetPosition(rkPosition);
+    pInstance->SetRotation(rkRotation.ToEuler());
+    pInstance->SetScale(rkScale);
+    pInstance->SetName(pTemplate->Name());
+    if (pTemplate->Game() < eEchoesDemo) pInstance->SetActive(true);
+    pLayer->AddInstance(pInstance, SuggestedLayerIndex);
+    mObjectMap[InstanceID] = pInstance;
+    return pInstance;
 }
 
-u32 CGameArea::GetLightCount(u32 layer)
+void CGameArea::DeleteInstance(CScriptObject *pInstance)
 {
-    if (mLightLayers.empty()) return 0;
-    return mLightLayers[layer].size();
-}
+    pInstance->Layer()->RemoveInstance(pInstance);
+    pInstance->Template()->RemoveObject(pInstance);
 
-CLight* CGameArea::GetLight(u32 layer, u32 light)
-{
-    return mLightLayers[layer][light];
-}
+    auto it = mObjectMap.find(pInstance->InstanceID());
+    if (it != mObjectMap.end()) mObjectMap.erase(it);
 
-CPoiToWorld* CGameArea::GetPoiToWorldMap()
-{
-    return mpPoiToWorldMap;
-}
+    if (mpPoiToWorldMap && mpPoiToWorldMap->HasPoiMappings(pInstance->InstanceID()))
+        mpPoiToWorldMap->RemovePoi(pInstance->InstanceID());
 
-CAABox CGameArea::AABox()
-{
-    return mAABox;
+    pInstance->BreakAllLinks();
+    delete pInstance;
 }

src/Core/Resource/CGameArea.h

@@ -9,12 +9,14 @@
 #include "Core/Resource/Model/CModel.h"
 #include "Core/Resource/Model/CStaticModel.h"
 #include <Common/types.h>
+#include <Math/CQuaternion.h>
 #include <Math/CTransform4f.h>
 
 #include <unordered_map>
 
 class CScriptLayer;
 class CScriptObject;
+class CScriptTemplate;
 
 class CGameArea : public CResource
 {
@@ -23,6 +25,7 @@ class CGameArea : public CResource
     friend class CAreaCooker;
 
     EGame mVersion;
+    u32 mWorldIndex;
     u32 mVertexCount;
     u32 mTriangleCount;
     bool mTerrainMerged;
@@ -50,7 +53,7 @@ class CGameArea : public CResource
     CScriptLayer *mpGeneratorLayer;
     std::unordered_map<u32, CScriptObject*> mObjectMap;
     // Collision
-    CCollisionMeshGroup *mCollision;
+    CCollisionMeshGroup *mpCollision;
     // Lights
     std::vector<std::vector<CLight*>> mLightLayers;
     // Object to Static Geometry Map
@@ -64,24 +67,34 @@ public:
     void MergeTerrain();
     void ClearTerrain();
     void ClearScriptLayers();
+    u32 TotalInstanceCount() const;
+    CScriptObject* InstanceByID(u32 InstanceID);
+    CScriptObject* SpawnInstance(CScriptTemplate *pTemplate, CScriptLayer *pLayer,
+                                 const CVector3f& rkPosition = CVector3f::skZero,
+                                 const CQuaternion& rkRotation = CQuaternion::skIdentity,
+                                 const CVector3f& rkScale = CVector3f::skOne,
+                                 u32 SuggestedID = -1, u32 SuggestedLayerIndex = -1);
+    void DeleteInstance(CScriptObject *pInstance);
 
-    // Getters
-    EGame Version();
-    CTransform4f GetTransform();
-    u32 GetTerrainModelCount();
-    u32 GetStaticModelCount();
-    CModel* GetTerrainModel(u32 mdl);
-    CStaticModel* GetStaticModel(u32 mdl);
-    CCollisionMeshGroup* GetCollision();
-    u32 GetScriptLayerCount();
-    CScriptLayer* GetScriptLayer(u32 index);
-    CScriptLayer* GetGeneratorLayer();
-    CScriptObject* GetInstanceByID(u32 InstanceID);
-    u32 GetLightLayerCount();
-    u32 GetLightCount(u32 layer);
-    CLight* GetLight(u32 layer, u32 light);
-    CPoiToWorld* GetPoiToWorldMap();
-    CAABox AABox();
+    // Inline Accessors
+    inline EGame Version() const                                    { return mVersion; }
+    inline u32 WorldIndex() const                                   { return mWorldIndex; }
+    inline CTransform4f GetTransform() const                        { return mTransform; }
+    inline u32 GetTerrainModelCount() const                         { return mTerrainModels.size(); }
+    inline u32 GetStaticModelCount() const                          { return mStaticTerrainModels.size(); }
+    inline CModel* GetTerrainModel(u32 iMdl) const                  { return mTerrainModels[iMdl]; }
+    inline CStaticModel* GetStaticModel(u32 iMdl) const             { return mStaticTerrainModels[iMdl]; }
+    inline CCollisionMeshGroup* GetCollision() const                { return mpCollision; }
+    inline u32 GetScriptLayerCount() const                          { return mScriptLayers.size(); }
+    inline CScriptLayer* GetScriptLayer(u32 Index) const            { return mScriptLayers[Index]; }
+    inline CScriptLayer* GetGeneratorLayer() const                  { return mpGeneratorLayer; }
+    inline u32 GetLightLayerCount() const                           { return mLightLayers.size(); }
+    inline u32 GetLightCount(u32 LayerIndex) const                  { return (LayerIndex < mLightLayers.size() ? mLightLayers[LayerIndex].size() : 0); }
+    inline CLight* GetLight(u32 LayerIndex, u32 LightIndex) const   { return mLightLayers[LayerIndex][LightIndex]; }
+    inline CPoiToWorld* GetPoiToWorldMap() const                    { return mpPoiToWorldMap; }
+    inline CAABox AABox() const                                     { return mAABox; }
+
+    inline void SetWorldIndex(u32 NewWorldIndex)                    { mWorldIndex = NewWorldIndex; }
 };
 
 #endif // CGAMEAREA_H

src/Core/Resource/CPoiToWorld.h

@@ -39,6 +39,22 @@ public:
     {
         return mMaps[Index];
     }
+
+    inline const SPoiMap* MapByID(u32 InstanceID) const
+    {
+        auto it = mPoiLookupMap.find(InstanceID);
+
+        if (it != mPoiLookupMap.end())
+            return it->second;
+        else
+            return nullptr;
+    }
+
+    bool HasPoiMappings(u32 InstanceID) const
+    {
+        auto it = mPoiLookupMap.find(InstanceID);
+        return (it != mPoiLookupMap.end());
+    }
 };
 
 #endif // CPOITOWORLD_H

src/Core/Resource/CResourceInfo.h

@@ -31,7 +31,7 @@ public:
 
     inline CUniqueID ID() const
     {
-        TString FileName = mPath.GetFileName();
+        TString FileName = mPath.GetFileName(false);
 
         if (!mIsPath)
             return CUniqueID::FromString(FileName);

src/Core/Resource/CWorld.cpp

@@ -16,12 +16,12 @@ CWorld::~CWorld()
 {
 }
 
-void CWorld::SetAreaLayerInfo(CGameArea *pArea, u32 AreaIndex)
+void CWorld::SetAreaLayerInfo(CGameArea *pArea)
 {
     // The AreaIndex parameter is a placeholder until an improved world loader is implemented.
     // For now it's the easiest/fastest way to do this because this function is called from
     // the start window and the start window already knows the area index.
-    SArea& AreaInfo = mAreas[AreaIndex];
+    SArea& AreaInfo = mAreas[pArea->WorldIndex()];
 
     for (u32 iLyr = 0; iLyr < pArea->GetScriptLayerCount(); iLyr++)
     {

src/Core/Resource/CWorld.h

@@ -84,7 +84,7 @@ public:
     CWorld();
     ~CWorld();
 
-    void SetAreaLayerInfo(CGameArea *pArea, u32 AreaIndex);
+    void SetAreaLayerInfo(CGameArea *pArea);
 
     // Setters
     EGame Version();

src/Core/Resource/Factory/CAreaLoader.cpp

@@ -595,7 +595,7 @@ void CAreaLoader::ReadCollision()
 {
     Log::FileWrite(mpMREA->GetSourceString(), "Reading collision (MP1/MP2/MP3)");
     mpSectionMgr->ToSection(mCollisionBlockNum);
-    mpArea->mCollision = CCollisionLoader::LoadAreaCollision(*mpMREA);
+    mpArea->mpCollision = CCollisionLoader::LoadAreaCollision(*mpMREA);
 }
 
 void CAreaLoader::ReadEGMC()
@@ -643,7 +643,7 @@ void CAreaLoader::SetUpObjects()
 
         if (iConMap != mConnectionMap.end())
         {
-            CScriptObject *pObj = mpArea->GetInstanceByID(InstanceID);
+            CScriptObject *pObj = mpArea->InstanceByID(InstanceID);
             pObj->mInLinks = iConMap->second;
         }
     }

src/Core/Resource/Factory/CScriptLoader.cpp

@@ -214,8 +214,8 @@ CScriptObject* CScriptLoader::LoadObjectMP1(IInputStream& SCLY)
         return nullptr;
     }
 
-    mpObj = new CScriptObject(mpArea, mpLayer, pTemp);
-    mpObj->mInstanceID = SCLY.ReadLong();
+    u32 InstanceID = SCLY.ReadLong();
+    mpObj = new CScriptObject(InstanceID, mpArea, mpLayer, pTemp);
 
     // Load connections
     u32 NumLinks = SCLY.ReadLong();
@@ -249,7 +249,7 @@ CScriptLayer* CScriptLoader::LoadLayerMP1(IInputStream &SCLY)
     SCLY.Seek(0x1, SEEK_CUR); // One unknown byte at the start of each layer
     u32 NumObjects = SCLY.ReadLong();
 
-    mpLayer = new CScriptLayer();
+    mpLayer = new CScriptLayer(mpArea);
     mpLayer->Reserve(NumObjects);
 
     for (u32 iObj = 0; iObj < NumObjects; iObj++)
@@ -327,8 +327,8 @@ CScriptObject* CScriptLoader::LoadObjectMP2(IInputStream& SCLY)
         return nullptr;
     }
 
-    mpObj = new CScriptObject(mpArea, mpLayer, pTemplate);
-    mpObj->mInstanceID = SCLY.ReadLong();
+    u32 InstanceID = SCLY.ReadLong();
+    mpObj = new CScriptObject(InstanceID, mpArea, mpLayer, pTemplate);
 
     // Load connections
     u32 NumConnections = SCLY.ReadShort();
@@ -359,7 +359,7 @@ CScriptLayer* CScriptLoader::LoadLayerMP2(IInputStream& SCLY)
     SCLY.Seek(0x1, SEEK_CUR); // Skipping version. todo: verify this?
     u32 NumObjects = SCLY.ReadLong();
 
-    mpLayer = new CScriptLayer();
+    mpLayer = new CScriptLayer(mpArea);
     mpLayer->Reserve(NumObjects);
 
     for (u32 iObj = 0; iObj < NumObjects; iObj++)
@@ -372,9 +372,10 @@ CScriptLayer* CScriptLoader::LoadLayerMP2(IInputStream& SCLY)
     return mpLayer;
 }
 
-CScriptLayer* CScriptLoader::LoadLayer(IInputStream &SCLY, CGameArea *pArea, EGame Version)
+// ************ STATIC ************
+CScriptLayer* CScriptLoader::LoadLayer(IInputStream& rSCLY, CGameArea *pArea, EGame Version)
 {
-    if (!SCLY.IsValid()) return nullptr;
+    if (!rSCLY.IsValid()) return nullptr;
 
     CScriptLoader Loader;
     Loader.mVersion = Version;
@@ -391,7 +392,7 @@ CScriptLayer* CScriptLoader::LoadLayer(IInputStream &SCLY, CGameArea *pArea, EGa
         CTemplateLoader::LoadGameTemplates(Version);
 
     if (Version <= ePrime)
-        return Loader.LoadLayerMP1(SCLY);
+        return Loader.LoadLayerMP1(rSCLY);
     else
-        return Loader.LoadLayerMP2(SCLY);
+        return Loader.LoadLayerMP2(rSCLY);
 }

src/Core/Resource/Script/CLink.h

@@ -52,8 +52,8 @@ public:
     void SetSender(u32 NewSenderID, u32 Index = -1)
     {
         u32 OldSenderID = mSenderID;
-        CScriptObject *pOldSender = mpArea->GetInstanceByID(OldSenderID);
-        CScriptObject *pNewSender = mpArea->GetInstanceByID(NewSenderID);
+        CScriptObject *pOldSender = mpArea->InstanceByID(OldSenderID);
+        CScriptObject *pNewSender = mpArea->InstanceByID(NewSenderID);
 
         mSenderID = NewSenderID;
         pOldSender->RemoveLink(eOutgoing, this);
@@ -63,8 +63,8 @@ public:
     void SetReceiver(u32 NewReceiverID, u32 Index = -1)
     {
         u32 OldReceiverID = mSenderID;
-        CScriptObject *pOldReceiver = mpArea->GetInstanceByID(OldReceiverID);
-        CScriptObject *pNewReceiver = mpArea->GetInstanceByID(NewReceiverID);
+        CScriptObject *pOldReceiver = mpArea->InstanceByID(OldReceiverID);
+        CScriptObject *pNewReceiver = mpArea->InstanceByID(NewReceiverID);
 
         mReceiverID = NewReceiverID;
         pOldReceiver->RemoveLink(eIncoming, this);
@@ -73,7 +73,7 @@ public:
 
     u32 SenderIndex() const
     {
-        CScriptObject *pSender = mpArea->GetInstanceByID(mSenderID);
+        CScriptObject *pSender = mpArea->InstanceByID(mSenderID);
 
         for (u32 iLink = 0; iLink < pSender->NumLinks(eOutgoing); iLink++)
         {
@@ -86,7 +86,7 @@ public:
 
     u32 ReceiverIndex() const
     {
-        CScriptObject *pReceiver = mpArea->GetInstanceByID(mReceiverID);
+        CScriptObject *pReceiver = mpArea->InstanceByID(mReceiverID);
 
         for (u32 iLink = 0; iLink < pReceiver->NumLinks(eIncoming); iLink++)
         {
@@ -117,8 +117,8 @@ public:
     u32 Message() const             { return mMessageID; }
     u32 SenderID() const            { return mSenderID; }
     u32 ReceiverID() const          { return mReceiverID; }
-    CScriptObject* Sender() const   { return mpArea->GetInstanceByID(mSenderID); }
-    CScriptObject* Receiver() const { return mpArea->GetInstanceByID(mReceiverID); }
+    CScriptObject* Sender() const   { return mpArea->InstanceByID(mSenderID); }
+    CScriptObject* Receiver() const { return mpArea->InstanceByID(mReceiverID); }
 
     void SetState(u32 StateID)      { mStateID = StateID; }
     void SetMessage(u32 MessageID)  { mMessageID = MessageID; }

src/Core/Resource/Script/CScriptLayer.h

@@ -8,13 +8,15 @@
 
 class CScriptLayer
 {
+    CGameArea *mpArea;
     TString mLayerName;
     bool mActive;
     bool mVisible;
     std::vector<CScriptObject*> mInstances;
 public:
-    CScriptLayer()
-        : mLayerName("New Layer")
+    CScriptLayer(CGameArea *pArea)
+        : mpArea(pArea)
+        , mLayerName("New Layer")
         , mActive(true)
         , mVisible(true)
     {
@@ -27,8 +29,16 @@ public:
     }
 
     // Data Manipulation
-    void AddInstance(CScriptObject *pObject)
+    void AddInstance(CScriptObject *pObject, u32 Index = -1)
     {
+        if (Index != -1 && Index < mInstances.size())
+        {
+            auto it = mInstances.begin();
+            std::advance(it, Index);
+            mInstances.insert(it, pObject);
+        }
+
+        else
             mInstances.push_back(pObject);
     }
 
@@ -67,6 +77,7 @@ public:
     }
 
     // Accessors
+    inline CGameArea* Area() const      { return mpArea; }
     inline TString Name() const         { return mLayerName; }
     inline bool IsActive() const        { return mActive; }
     inline bool IsVisible() const       { return mVisible; }
@@ -88,6 +99,17 @@ public:
     inline void SetActive(bool Active)          { mActive = Active; }
     inline void SetVisible(bool Visible)        { mVisible = Visible; }
 
+    inline u32 AreaIndex() const
+    {
+        for (u32 iLyr = 0; iLyr < mpArea->GetScriptLayerCount(); iLyr++)
+        {
+            if (mpArea->GetScriptLayer(iLyr) == this)
+                return iLyr;
+        }
+
+        return -1;
+    }
+
     // Operators
     CScriptObject* operator[](u32 Index) { return InstanceByIndex(Index); }
 };

src/Core/Resource/Script/CScriptObject.cpp

@@ -3,11 +3,12 @@
 #include "CMasterTemplate.h"
 #include "Core/Resource/CAnimSet.h"
 
-CScriptObject::CScriptObject(CGameArea *pArea, CScriptLayer *pLayer, CScriptTemplate *pTemplate)
+CScriptObject::CScriptObject(u32 InstanceID, CGameArea *pArea, CScriptLayer *pLayer, CScriptTemplate *pTemplate)
     : mpTemplate(pTemplate)
     , mpArea(pArea)
     , mpLayer(pLayer)
     , mVersion(0)
+    , mInstanceID(InstanceID)
     , mpDisplayModel(nullptr)
     , mpCollision(nullptr)
     , mHasInGameModel(false)
@@ -75,16 +76,27 @@ bool CScriptObject::IsEditorProperty(IProperty *pProp)
            );
 }
 
-void CScriptObject::SetLayer(CScriptLayer *pLayer)
+void CScriptObject::SetLayer(CScriptLayer *pLayer, u32 NewLayerIndex)
 {
     if (pLayer != mpLayer)
     {
         mpLayer->RemoveInstance(this);
         mpLayer = pLayer;
-        mpLayer->AddInstance(this);
+        mpLayer->AddInstance(this, NewLayerIndex);
     }
 }
 
+u32 CScriptObject::LayerIndex() const
+{
+    for (u32 iInst = 0; iInst < mpLayer->NumInstances(); iInst++)
+    {
+        if (mpLayer->InstanceByIndex(iInst) == this)
+            return iInst;
+    }
+
+    return -1;
+}
+
 bool CScriptObject::HasNearVisibleActivation() const
 {
     /* This function is used to check whether an inactive DKCR object should render in game mode. DKCR deactivates a lot of
@@ -240,6 +252,26 @@ void CScriptObject::RemoveLink(ELinkType Type, CLink *pLink)
     }
 }
 
+void CScriptObject::BreakAllLinks()
+{
+    for (auto it = mInLinks.begin(); it != mInLinks.end(); it++)
+    {
+        CLink *pLink = *it;
+        pLink->Sender()->RemoveLink(eOutgoing, pLink);
+        delete pLink;
+    }
+
+    for (auto it = mOutLinks.begin(); it != mOutLinks.end(); it++)
+    {
+        CLink *pLink = *it;
+        pLink->Receiver()->RemoveLink(eIncoming, pLink);
+        delete pLink;
+    }
+
+    mInLinks.clear();
+    mOutLinks.clear();
+}
+
 TString CScriptObject::InstanceName() const
 {
     if (mpInstanceName)

src/Core/Resource/Script/CScriptObject.h

@@ -50,7 +50,7 @@ class CScriptObject
     mutable bool mIsCheckingNearVisibleActivation;
 
 public:
-    CScriptObject(CGameArea *pArea, CScriptLayer *pLayer, CScriptTemplate *pTemplate);
+    CScriptObject(u32 InstanceID, CGameArea *pArea, CScriptLayer *pLayer, CScriptTemplate *pTemplate);
     ~CScriptObject();
 
     void EvaluateProperties();
@@ -59,7 +59,8 @@ public:
     void EvaluateCollisionModel();
     void EvaluateVolume();
     bool IsEditorProperty(IProperty *pProp);
-    void SetLayer(CScriptLayer *pLayer);
+    void SetLayer(CScriptLayer *pLayer, u32 NewLayerIndex = -1);
+    u32 LayerIndex() const;
     bool HasNearVisibleActivation() const;
 
     CScriptTemplate* Template() const;
@@ -78,6 +79,7 @@ public:
     CLink* Link(ELinkType Type, u32 Index) const;
     void AddLink(ELinkType Type, CLink *pLink, u32 Index = -1);
     void RemoveLink(ELinkType Type, CLink *pLink);
+    void BreakAllLinks();
 
     CVector3f Position() const;
     CVector3f Rotation() const;

src/Core/Scene/CScene.cpp

@@ -65,6 +65,18 @@ CScriptNode* CScene::CreateScriptNode(CScriptObject *pObj)
 
     CScriptNode *pNode = new CScriptNode(this, mpAreaRootNode, pObj);
     mNodes[eScriptNode].push_back(pNode);
+    mScriptNodeMap[pObj->InstanceID()] = pNode;
+    pNode->BuildLightList(mpArea);
+
+    // AreaAttributes check
+    switch (pObj->ObjectTypeID())
+    {
+    case 0x4E:       // MP1 AreaAttributes ID
+    case 0x52454141: // MP2/MP3/DKCR AreaAttributes ID ("REAA")
+        mAreaAttributesObjects.emplace_back( CAreaAttributes(pObj) );
+        break;
+    }
+
     mNumNodes++;
     return pNode;
 }
@@ -79,6 +91,48 @@ CLightNode* CScene::CreateLightNode(CLight *pLight)
     return pNode;
 }
 
+void CScene::DeleteNode(CSceneNode *pNode)
+{
+    ENodeType Type = pNode->NodeType();
+
+    for (auto it = mNodes[Type].begin(); it != mNodes[Type].end(); it++)
+    {
+        if (*it == pNode)
+        {
+            mNodes[Type].erase(it);
+            break;
+        }
+    }
+
+    if (Type == eScriptNode)
+    {
+        CScriptNode *pScript = static_cast<CScriptNode*>(pNode);
+
+        auto ScriptMapIt = mScriptNodeMap.find(pScript->Object()->InstanceID());
+        if (ScriptMapIt != mScriptNodeMap.end())
+            mScriptNodeMap.erase(ScriptMapIt);
+
+        switch (pScript->Object()->ObjectTypeID())
+        {
+        case 0x4E:
+        case 0x52454141:
+            for (auto it = mAreaAttributesObjects.begin(); it != mAreaAttributesObjects.end(); it++)
+            {
+                if ((*it).Instance() == pScript->Object())
+                {
+                    mAreaAttributesObjects.erase(it);
+                    break;
+                }
+            }
+            break;
+        }
+    }
+
+    pNode->Unparent();
+    delete pNode;
+    mNumNodes--;
+}
+
 void CScene::SetActiveArea(CGameArea *pArea)
 {
     // Clear existing area
@@ -121,20 +175,7 @@ void CScene::SetActiveArea(CGameArea *pArea)
         for (u32 iObj = 0; iObj < NumObjects; iObj++)
         {
             CScriptObject *pObj = pLayer->InstanceByIndex(iObj);
-            CScriptNode *pNode = CreateScriptNode(pObj);
-            pNode->BuildLightList(mpArea);
-
-            // Add to map
-            mScriptNodeMap[pObj->InstanceID()] = pNode;
-
-            // AreaAttributes check
-            switch (pObj->ObjectTypeID())
-            {
-            case 0x4E:       // MP1 AreaAttributes ID
-            case 0x52454141: // MP2/MP3/DKCR AreaAttributes ID ("REAA")
-                mAreaAttributesObjects.emplace_back( CAreaAttributes(pObj) );
-                break;
-            }
+            CreateScriptNode(pObj);
         }
     }
 
@@ -144,10 +185,7 @@ void CScene::SetActiveArea(CGameArea *pArea)
         for (u32 iObj = 0; iObj < pGenLayer->NumInstances(); iObj++)
         {
             CScriptObject *pObj = pGenLayer->InstanceByIndex(iObj);
-            CScriptNode *pNode = CreateScriptNode(pObj);
-
-            // Add to map
-            mScriptNodeMap[pObj->InstanceID()] = pNode;
+            CreateScriptNode(pObj);
         }
     }
 
@@ -217,16 +255,10 @@ void CScene::AddSceneToRenderer(CRenderer *pRenderer, const SViewInfo& ViewInfo)
     FShowFlags ShowFlags = (ViewInfo.GameMode ? gkGameModeShowFlags : ViewInfo.ShowFlags);
     FNodeFlags NodeFlags = NodeFlagsForShowFlags(ShowFlags);
 
-    for (auto it = mNodes.begin(); it != mNodes.end(); it++)
+    for (CSceneIterator It(this, NodeFlags, false); It; ++It)
     {
-        if (NodeFlags & it->first)
-        {
-            std::vector<CSceneNode*>& rNodeVec = it->second;
-
-            for (u32 iNode = 0; iNode < rNodeVec.size(); iNode++)
-                if (ViewInfo.GameMode || rNodeVec[iNode]->IsVisible())
-                    rNodeVec[iNode]->AddToRenderer(pRenderer, ViewInfo);
-        }
+        if (ViewInfo.GameMode || It->IsVisible())
+            It->AddToRenderer(pRenderer, ViewInfo);
     }
 }
 
@@ -236,16 +268,10 @@ SRayIntersection CScene::SceneRayCast(const CRay& Ray, const SViewInfo& ViewInfo
     FNodeFlags NodeFlags = NodeFlagsForShowFlags(ShowFlags);
     CRayCollisionTester Tester(Ray);
 
-    for (auto it = mNodes.begin(); it != mNodes.end(); it++)
+    for (CSceneIterator It(this, NodeFlags, false); It; ++It)
     {
-        if (NodeFlags & it->first)
-        {
-            std::vector<CSceneNode*>& rNodeVec = it->second;
-
-            for (u32 iNode = 0; iNode < rNodeVec.size(); iNode++)
-                if (rNodeVec[iNode]->IsVisible())
-                    rNodeVec[iNode]->RayAABoxIntersectTest(Tester, ViewInfo);
-        }
+        if (It->IsVisible())
+            It->RayAABoxIntersectTest(Tester, ViewInfo);
     }
 
     return Tester.TestNodes(ViewInfo);

src/Core/Scene/CScene.h

@@ -51,6 +51,7 @@ public:
     CCollisionNode* CreateCollisionNode(CCollisionMeshGroup *pMesh);
     CScriptNode* CreateScriptNode(CScriptObject *pObj);
     CLightNode* CreateLightNode(CLight *pLight);
+    void DeleteNode(CSceneNode *pNode);
     void SetActiveArea(CGameArea *pArea);
     void SetActiveWorld(CWorld *pWorld);
     void PostLoad();

src/Core/Scene/CSceneIterator.h

@@ -38,7 +38,7 @@ public:
 
     inline operator bool() const
     {
-        return DoneIterating();
+        return !DoneIterating();
     }
 
     inline CSceneNode* operator*() const

src/Editor/CNodeSelection.cpp

@@ -1,58 +0,0 @@
-#include "CNodeSelection.h"
-
-CSceneSelection::CSceneSelection(CScene *pScene)
-{
-    mpScene = pScene;
-}
-
-void CSceneSelection::SelectNode(CSceneNode *pNode)
-{
-    // There shouldn't be more than one selection per scene, so this should be safe.
-    if (!pNode->IsSelected())
-    {
-        pNode->SetSelected(true);
-        mSelectedNodes.push_back(pNode);
-    }
-}
-
-void CSceneSelection::DeselectNode(CSceneNode *pNode)
-{
-    if (pNode->IsSelected())
-    {
-        pNode->SetSelected(false);
-
-        for (auto it = mSelectedNodes.begin(); it != mSelectedNodes.end(); it++)
-        {
-            if (*it == pNode)
-            {
-                mSelectedNodes.erase(it);
-                break;
-            }
-        }
-    }
-}
-
-u32 CSceneSelection::SelectionSize()
-{
-    return mSelectedNodes.size();
-}
-
-CSceneNode* CSceneSelection::NodeByIndex(u32 Index)
-{
-    if (Index >= SelectionSize()) return nullptr;
-    return mSelectedNodes[Index];
-}
-
-void CSceneSelection::ClearSelection()
-{
-    for (auto it = mSelectedNodes.begin(); it != mSelectedNodes.end(); it++)
-        (*it)->SetSelected(false);
-
-    mSelectedNodes.clear();
-}
-
-// ************ OPERATORS ************
-CSceneNode* CSceneSelection::operator[](u32 Index)
-{
-    return NodeByIndex(Index);
-}

src/Editor/CNodeSelection.h

@@ -1,24 +1,126 @@
 #ifndef CNODESELECTION_H
 #define CNODESELECTION_H
 
+#include <Core/Scene/CSceneIterator.h>
 #include <Core/Scene/CSceneNode.h>
-#include <list>
+#include <Core/Scene/CScriptNode.h>
+#include <QList>
+#include <QObject>
 
-class CSceneSelection
+class CNodeSelection : public QObject
 {
-    CScene *mpScene;
-    std::vector<CSceneNode*> mSelectedNodes;
+    Q_OBJECT
+
+    FNodeFlags mAllowedNodes;
+    QList<CSceneNode*> mSelectedNodes;
+
+    mutable CAABox mCachedBounds;
+    mutable bool mBoundsDirty;
 
 public:
-    CSceneSelection(CScene *pScene);
-    void SelectNode(CSceneNode *pNode);
-    void DeselectNode(CSceneNode *pNode);
-    u32 SelectionSize();
-    CSceneNode* NodeByIndex(u32 Index);
-    void ClearSelection();
+    CNodeSelection()
+        : mAllowedNodes(eAllNodeTypes)
+        , mBoundsDirty(true) {}
 
-    // Operators
-    CSceneNode* operator[](u32 Index);
+    ~CNodeSelection()
+    {
+        foreach (CSceneNode *pNode, mSelectedNodes)
+            pNode->SetSelected(false);
+    }
+
+    void SelectNode(CSceneNode *pNode)
+    {
+        if (IsAllowedType(pNode->NodeType()) && !pNode->IsSelected())
+        {
+            pNode->SetSelected(true);
+            mSelectedNodes << pNode;
+            mCachedBounds.ExpandBounds(pNode->AABox());
+            emit Modified();
+        }
+    }
+
+    void DeselectNode(CSceneNode *pNode)
+    {
+        if (pNode->IsSelected())
+        {
+            pNode->SetSelected(false);
+            mSelectedNodes.removeOne(pNode);
+            mBoundsDirty = true;
+            emit Modified();
+        }
+    }
+
+    void Clear()
+    {
+        foreach (CSceneNode *pNode, mSelectedNodes)
+            pNode->SetSelected(false);
+
+        mSelectedNodes.clear();
+        mBoundsDirty = true;
+        emit Modified();
+    }
+
+    void ClearAndSelectNode(CSceneNode *pNode)
+    {
+        // Block signals for Clear so that Modified only emits once.
+        blockSignals(true);
+        Clear();
+        blockSignals(false);
+        SelectNode(pNode);
+    }
+
+    void SetSelectedNodes(const QList<CSceneNode*>& rkList)
+    {
+        blockSignals(true);
+        Clear();
+
+        foreach (CSceneNode *pNode, rkList)
+            SelectNode(pNode);
+        blockSignals(false);
+
+        mBoundsDirty = true;
+        emit Modified();
+    }
+
+    CAABox Bounds() const
+    {
+        if (mBoundsDirty)
+        {
+            mCachedBounds = CAABox::skInfinite;
+
+            foreach (CSceneNode *pNode, mSelectedNodes)
+            {
+                mCachedBounds.ExpandBounds(pNode->AABox());
+
+                if (pNode->NodeType() == eScriptNode)
+                {
+                    CScriptNode *pScript = static_cast<CScriptNode*>(pNode);
+
+                    if (pScript->HasPreviewVolume())
+                        mCachedBounds.ExpandBounds(pScript->PreviewVolumeAABox());
+                }
+            }
+
+            mBoundsDirty = false;
+        }
+
+        return mCachedBounds;
+    }
+
+    inline u32 Size() const                             { return mSelectedNodes.size(); }
+    inline bool IsEmpty() const                         { return Size() == 0; }
+    inline CSceneNode* At(u32 Index) const              { return mSelectedNodes[Index]; }
+    inline CSceneNode* Front() const                    { return mSelectedNodes.front(); }
+    inline CSceneNode* Back() const                     { return mSelectedNodes.back(); }
+    inline CSceneNode* operator[](u32 Index) const      { return mSelectedNodes[Index]; }
+    inline void UpdateBounds()                          { mBoundsDirty = true; }
+    inline void SetAllowedNodeTypes(FNodeFlags Types)   { mAllowedNodes = Types; }
+    inline bool IsAllowedType(ENodeType Type) const     { return (mAllowedNodes & Type) != 0; }
+    inline bool IsAllowedType(CSceneNode *pNode) const  { return (mAllowedNodes & pNode->NodeType()) != 0; }
+    inline QList<CSceneNode*> SelectedNodeList() const  { return mSelectedNodes; }
+
+signals:
+    void Modified();
 };
 
 #endif // CNODESELECTION_H

src/Editor/CSceneViewport.cpp

@@ -1,4 +1,5 @@
 #include "CSceneViewport.h"
+#include "CSelectionIterator.h"
 #include "UICommon.h"
 #include "Editor/Undo/UndoCommands.h"
 #include <Core/Render/CDrawUtil.h>
@@ -386,10 +387,8 @@ void CSceneViewport::OnToggleSelect()
 
 void CSceneViewport::OnHideSelection()
 {
-    const QList<CSceneNode*>& rkSelection = mpEditor->GetSelection();
-
-    foreach (CSceneNode *pNode, rkSelection)
-        pNode->SetVisible(false);
+    for (CSelectionIterator It(mpEditor->Selection()); It; ++It)
+        It->SetVisible(false);
 }
 
 void CSceneViewport::OnHideUnselected()

src/Editor/CSelectionIterator.h

@@ -0,0 +1,25 @@
+#ifndef CSELECTIONITERATOR
+#define CSELECTIONITERATOR
+
+#include "CNodeSelection.h"
+
+class CSelectionIterator
+{
+    CNodeSelection *mpSelection;
+    u32 mCurrentIndex;
+
+public:
+    CSelectionIterator(CNodeSelection *pSelection)
+        : mpSelection(pSelection), mCurrentIndex(0) {}
+
+    inline void Next()                          { mCurrentIndex++; }
+    inline bool DoneIterating() const           { return (mCurrentIndex == mpSelection->Size()); }
+    inline operator bool() const                { return !DoneIterating(); }
+    inline CSceneNode* operator*() const        { return mpSelection->At(mCurrentIndex); }
+    inline CSceneNode* operator->() const       { return mpSelection->At(mCurrentIndex); }
+    inline CSelectionIterator& operator++()     { Next(); return *this; }
+    inline CSelectionIterator operator++(int)   { CSelectionIterator Copy = *this; Next(); return Copy; }
+};
+
+#endif // CSELECTIONITERATOR
+

src/Editor/CStartWindow.cpp

@@ -183,8 +183,9 @@ void CStartWindow::on_LaunchWorldEditorButton_clicked()
 
         else
         {
-            mpWorld->SetAreaLayerInfo(pArea, mSelectedAreaIndex);
-            mpWorldEditor->SetArea(mpWorld, pArea, mSelectedAreaIndex);
+            pArea->SetWorldIndex(mSelectedAreaIndex);
+            mpWorld->SetAreaLayerInfo(pArea);
+            mpWorldEditor->SetArea(mpWorld, pArea);
             gResCache.Clean();
 
             mpWorldEditor->setWindowModality(Qt::WindowModal);

src/Editor/Editor.pro

@@ -149,17 +149,19 @@ HEADERS += \
     Undo/CAddLinkCommand.h \
     Undo/CDeleteLinksCommand.h \
     Undo/CEditLinkCommand.h \
-    WorldEditor/CConfirmUnlinkDialog.h
+    WorldEditor/CConfirmUnlinkDialog.h \
+    Undo/CDeleteSelectionCommand.h \
+    Undo/CCreateInstanceCommand.h \
+    WorldEditor/CTemplateMimeData.h \
+    WorldEditor/CTemplateListView.h \
+    CSelectionIterator.h
 
 # Source Files
 SOURCES += \
     ModelEditor/CModelEditorViewport.cpp \
     ModelEditor/CModelEditorWindow.cpp \
-    Undo/CClearSelectionCommand.cpp \
-    Undo/CDeselectNodeCommand.cpp \
     Undo/CRotateNodeCommand.cpp \
     Undo/CScaleNodeCommand.cpp \
-    Undo/CSelectNodeCommand.cpp \
     Undo/CTranslateNodeCommand.cpp \
     Widgets/IPreviewPanel.cpp \
     Widgets/WAnimParamsEditor.cpp \
@@ -185,7 +187,6 @@ SOURCES += \
     CBasicViewport.cpp \
     CDarkStyle.cpp \
     CGizmo.cpp \
-    CNodeSelection.cpp \
     CSceneViewport.cpp \
     CStartWindow.cpp \
     INodeEditor.cpp \
@@ -193,8 +194,6 @@ SOURCES += \
     TestDialog.cpp \
     UICommon.cpp \
     CErrorLogDialog.cpp \
-    Undo/CSelectAllCommand.cpp \
-    Undo/CInvertSelectionCommand.cpp \
     WorldEditor/CPoiMapEditDialog.cpp \
     WorldEditor/CPoiMapModel.cpp \
     PropertyEdit/CPropertyModel.cpp \
@@ -211,7 +210,9 @@ SOURCES += \
     WorldEditor/CSelectInstanceDialog.cpp \
     Undo/CAddLinkCommand.cpp \
     Undo/CDeleteLinksCommand.cpp \
-    Undo/CEditLinkCommand.cpp
+    Undo/CEditLinkCommand.cpp \
+    Undo/CDeleteSelectionCommand.cpp \
+    Undo/CCreateInstanceCommand.cpp
 
 # UI Files
 FORMS += \

src/Editor/INodeEditor.cpp

@@ -1,11 +1,12 @@
 #include "INodeEditor.h"
+#include "CSelectionIterator.h"
 #include "Editor/Undo/UndoCommands.h"
 #include <QMouseEvent>
 
 INodeEditor::INodeEditor(QWidget *pParent)
     : QMainWindow(pParent)
     , mPickMode(false)
-    , mSelectionNodeFlags(eAllNodeTypes)
+    , mpSelection(new CNodeSelection)
     , mSelectionLocked(false)
     , mShowGizmo(false)
     , mGizmoHovering(false)
@@ -53,10 +54,12 @@ INodeEditor::INodeEditor(QWidget *pParent)
     connect(mGizmoActions[2], SIGNAL(triggered()), this, SLOT(OnRotateTriggered()));
     connect(mGizmoActions[3], SIGNAL(triggered()), this, SLOT(OnScaleTriggered()));
     connect(mpTransformCombo, SIGNAL(currentIndexChanged(int)), this, SLOT(OnTransformSpaceChanged(int)));
+    connect(mpSelection, SIGNAL(Modified()), this, SLOT(OnSelectionModified()));
 }
 
 INodeEditor::~INodeEditor()
 {
+    delete mpSelection;
 }
 
 QUndoStack* INodeEditor::UndoStack()
@@ -76,7 +79,7 @@ CGizmo* INodeEditor::Gizmo()
 
 bool INodeEditor::IsGizmoVisible()
 {
-    return (mShowGizmo && !mSelection.empty());
+    return (mShowGizmo && !mpSelection->IsEmpty());
 }
 
 void INodeEditor::BeginGizmoTransform()
@@ -113,33 +116,12 @@ ETransformSpace INodeEditor::CurrentTransformSpace()
     }
 }
 
-void INodeEditor::RecalculateSelectionBounds()
-{
-    mSelectionBounds = CAABox::skInfinite;
-
-    foreach (CSceneNode *pNode, mSelection)
-        ExpandSelectionBounds(pNode);
-}
-
-void INodeEditor::ExpandSelectionBounds(CSceneNode *pNode)
-{
-    mSelectionBounds.ExpandBounds(pNode->AABox());
-
-    if (pNode->NodeType() == eScriptNode)
-    {
-        CScriptNode *pScript = static_cast<CScriptNode*>(pNode);
-
-        if (pScript->HasPreviewVolume())
-            mSelectionBounds.ExpandBounds(pScript->PreviewVolumeAABox());
-    }
-}
-
 void INodeEditor::SelectNode(CSceneNode *pNode)
 {
     if (!mSelectionLocked)
     {
         if (!pNode->IsSelected())
-            mUndoStack.push(new CSelectNodeCommand(this, pNode, mSelection));
+            mUndoStack.push(new CSelectNodeCommand(mpSelection, pNode));
     }
 }
 
@@ -148,7 +130,7 @@ void INodeEditor::DeselectNode(CSceneNode *pNode)
     if (!mSelectionLocked)
     {
         if (pNode->IsSelected())
-            mUndoStack.push(new CDeselectNodeCommand(this, pNode, mSelection));
+            mUndoStack.push(new CDeselectNodeCommand(mpSelection, pNode));
     }
 }
 
@@ -156,8 +138,8 @@ void INodeEditor::ClearSelection()
 {
     if (!mSelectionLocked)
     {
-        if (!mSelection.empty())
-            mUndoStack.push(new CClearSelectionCommand(this, mSelection));
+        if (!mpSelection->IsEmpty())
+            mUndoStack.push(new CClearSelectionCommand(mpSelection));
     }
 }
 
@@ -165,17 +147,17 @@ void INodeEditor::ClearAndSelectNode(CSceneNode *pNode)
 {
     if (!mSelectionLocked)
     {
-        if (mSelection.empty())
-            mUndoStack.push(new CSelectNodeCommand(this, pNode, mSelection));
+        if (mpSelection->IsEmpty())
+            mUndoStack.push(new CSelectNodeCommand(mpSelection, pNode));
 
-        else if ((mSelection.size() == 1) && (mSelection.front() == pNode))
+        else if ((mpSelection->Size() == 1) && (mpSelection->Front() == pNode))
             return;
 
         else
         {
             mUndoStack.beginMacro("Select");
-            mUndoStack.push(new CClearSelectionCommand(this, mSelection));
-            mUndoStack.push(new CSelectNodeCommand(this, pNode, mSelection));
+            mUndoStack.push(new CClearSelectionCommand(mpSelection));
+            mUndoStack.push(new CSelectNodeCommand(mpSelection, pNode));
             mUndoStack.endMacro();
         }
     }
@@ -184,13 +166,13 @@ void INodeEditor::ClearAndSelectNode(CSceneNode *pNode)
 void INodeEditor::SelectAll(FNodeFlags NodeFlags)
 {
     if (!mSelectionLocked)
-        mUndoStack.push(new CSelectAllCommand(this, mSelection, &mScene, NodeFlags));
+        mUndoStack.push(new CSelectAllCommand(mpSelection, &mScene, NodeFlags));
 }
 
 void INodeEditor::InvertSelection(FNodeFlags NodeFlags)
 {
     if (!mSelectionLocked)
-        mUndoStack.push(new CInvertSelectionCommand(this, mSelection, &mScene, NodeFlags));
+        mUndoStack.push(new CInvertSelectionCommand(mpSelection, &mScene, NodeFlags));
 }
 
 void INodeEditor::SetSelectionLocked(bool Locked)
@@ -200,12 +182,12 @@ void INodeEditor::SetSelectionLocked(bool Locked)
 
 bool INodeEditor::HasSelection() const
 {
-    return (!mSelection.isEmpty());
+    return (!mpSelection->IsEmpty());
 }
 
-const QList<CSceneNode*>& INodeEditor::GetSelection() const
+CNodeSelection* INodeEditor::Selection() const
 {
-    return mSelection;
+    return mpSelection;
 }
 
 void INodeEditor::EnterPickMode(FNodeFlags AllowedNodes, bool ExitOnInvalidPick, bool EmitOnInvalidPick, bool EmitHoverOnButtonPress, QCursor Cursor /*= Qt::CrossCursor*/)
@@ -231,22 +213,42 @@ void INodeEditor::ExitPickMode()
     }
 }
 
-void INodeEditor::NotifySelectionModified()
+void INodeEditor::NotifySelectionTransformed()
+{
+    for (CSelectionIterator It(mpSelection); It; ++It)
+        It->OnTransformed();
+
+    mpSelection->UpdateBounds();
+    emit SelectionTransformed();
+}
+
+void INodeEditor::NotifyNodeAboutToBeSpawned()
+{
+    emit NodeAboutToBeSpawned();
+}
+
+void INodeEditor::NotifyNodeSpawned(CSceneNode *pNode)
+{
+    emit NodeSpawned(pNode);
+}
+
+void INodeEditor::NotifyNodeAboutToBeDeleted(CSceneNode *pNode)
+{
+    emit NodeAboutToBeDeleted(pNode);
+}
+
+void INodeEditor::NotifyNodeDeleted()
+{
+    emit NodeDeleted();
+}
+
+// ************ PUBLIC SLOTS ************
+void INodeEditor::OnSelectionModified()
 {
-    RecalculateSelectionBounds();
     UpdateSelectionUI();
     emit SelectionModified();
 }
 
-void INodeEditor::NotifySelectionTransformed()
-{
-    foreach (CSceneNode *pNode, mSelection)
-        pNode->OnTransformed();
-
-    emit SelectionTransformed();
-}
-
-// ************ PUBLIC SLOTS ************
 void INodeEditor::OnGizmoMoved()
 {
     switch (mGizmo.Mode())
@@ -254,26 +256,25 @@ void INodeEditor::OnGizmoMoved()
         case CGizmo::eTranslate:
         {
             CVector3f delta = mGizmo.DeltaTranslation();
-            mUndoStack.push(new CTranslateNodeCommand(this, mSelection, delta, mTranslateSpace));
+            mUndoStack.push(new CTranslateNodeCommand(this, mpSelection->SelectedNodeList(), delta, mTranslateSpace));
             break;
         }
 
         case CGizmo::eRotate:
         {
             CQuaternion delta = mGizmo.DeltaRotation();
-            mUndoStack.push(new CRotateNodeCommand(this, mSelection, CVector3f::skZero, delta, mRotateSpace));
+            mUndoStack.push(new CRotateNodeCommand(this, mpSelection->SelectedNodeList(), CVector3f::skZero, delta, mRotateSpace));
             break;
         }
 
         case CGizmo::eScale:
         {
             CVector3f delta = mGizmo.DeltaScale();
-            mUndoStack.push(new CScaleNodeCommand(this, mSelection, CVector3f::skZero, delta));
+            mUndoStack.push(new CScaleNodeCommand(this, mpSelection->SelectedNodeList(), CVector3f::skZero, delta));
             break;
         }
     }
 
-    RecalculateSelectionBounds();
     UpdateGizmoUI();
 }
 
@@ -285,7 +286,7 @@ void INodeEditor::OnViewportClick(const SRayIntersection& rkRayIntersect, QMouse
     // Not in pick mode: process node selection/deselection
     if (!mPickMode)
     {
-        bool ValidNode = (pNode && (pNode->NodeType() & mSelectionNodeFlags));
+        bool ValidNode = (pNode && mpSelection->IsAllowedType(pNode));
         bool AltPressed = ((pEvent->modifiers() & Qt::AltModifier) != 0);
         bool CtrlPressed = ((pEvent->modifiers() & Qt::ControlModifier) != 0);
 
@@ -364,11 +365,11 @@ void INodeEditor::UpdateTransformActionsEnabled()
     bool AllowTranslate = true, AllowRotate = true, AllowScale = true;
     bool SelectedModeWasEnabled = mpGizmoGroup->checkedAction()->isEnabled();
 
-    for (auto it = mSelection.begin(); it != mSelection.end(); it++)
+    for (CSelectionIterator It(mpSelection); It; ++It)
     {
-        if (!(*it)->AllowsTranslate()) AllowTranslate = false;
-        if (!(*it)->AllowsRotate()) AllowRotate = false;
-        if (!(*it)->AllowsScale()) AllowScale = false;
+        if (!It->AllowsTranslate()) AllowTranslate = false;
+        if (!It->AllowsRotate())    AllowRotate = false;
+        if (!It->AllowsScale())     AllowScale = false;
     }
 
     mGizmoActions[1]->setEnabled(AllowTranslate);

src/Editor/INodeEditor.h

@@ -2,6 +2,7 @@
 #define INODEEDITOR_H
 
 #include "CGizmo.h"
+#include "CNodeSelection.h"
 #include <Math/ETransformSpace.h>
 #include <Core/Scene/CScene.h>
 
@@ -23,9 +24,7 @@ protected:
 
     // Node management
     CScene mScene;
-    QList<CSceneNode*> mSelection;
-    FNodeFlags mSelectionNodeFlags;
-    CAABox mSelectionBounds;
+    CNodeSelection *mpSelection;
     bool mSelectionLocked;
 
     // Gizmo
@@ -62,8 +61,6 @@ public:
     void EndGizmoTransform();
     ETransformSpace CurrentTransformSpace();
 
-    void RecalculateSelectionBounds();
-    void ExpandSelectionBounds(CSceneNode *pNode);
     void SelectNode(CSceneNode *pNode);
     void DeselectNode(CSceneNode *pNode);
     void ClearSelection();
@@ -72,15 +69,22 @@ public:
     void InvertSelection(FNodeFlags NodeFlags);
     void SetSelectionLocked(bool Locked);
     bool HasSelection() const;
-    const QList<CSceneNode*>& GetSelection() const;
+    CNodeSelection* Selection() const;
 
     void EnterPickMode(FNodeFlags AllowedNodes, bool ExitOnInvalidPick, bool EmitOnInvalidPick, bool EmitHoverOnButtonPress, QCursor Cursor = Qt::CrossCursor);
     void ExitPickMode();
 
-    void NotifySelectionModified();
     void NotifySelectionTransformed();
+    virtual void NotifyNodeAboutToBeSpawned();
+    virtual void NotifyNodeSpawned(CSceneNode *pNode);
+    virtual void NotifyNodeAboutToBeDeleted(CSceneNode *pNode);
+    virtual void NotifyNodeDeleted();
 
 signals:
+    void NodeAboutToBeSpawned();
+    void NodeSpawned(CSceneNode *pNode);
+    void NodeAboutToBeDeleted(CSceneNode *pNode);
+    void NodeDeleted();
     void SelectionModified();
     void SelectionTransformed();
 
@@ -90,6 +94,7 @@ signals:
     void PickModeHoverChanged(const SRayIntersection& rkRayIntersect, QMouseEvent *pEvent);
 
 public slots:
+    void OnSelectionModified();
     void OnGizmoMoved();
     virtual void UpdateGizmoUI() = 0;
     virtual void UpdateSelectionUI() = 0;

src/Editor/PropertyEdit/CPropertyModel.cpp

@@ -499,7 +499,7 @@ Qt::ItemFlags CPropertyModel::flags(const QModelIndex& rkIndex) const
     else return (Qt::ItemIsEnabled | Qt::ItemIsEditable);
 }
 
-void CPropertyModel::NotifyPropertyModified(IProperty *pProp)
+void CPropertyModel::NotifyPropertyModified(class CScriptObject*, IProperty *pProp)
 {
     NotifyPropertyModified(IndexForProperty(pProp));
 }

src/Editor/PropertyEdit/CPropertyModel.h

@@ -35,7 +35,7 @@ public:
     inline void SetBoldModifiedProperties(bool Enable) { mBoldModifiedProperties = Enable; }
 
 public slots:
-    void NotifyPropertyModified(IProperty *pProp);
+    void NotifyPropertyModified(class CScriptObject *pInst, IProperty *pProp);
     void NotifyPropertyModified(const QModelIndex& rkIndex);
 
 signals:

src/Editor/PropertyEdit/CPropertyView.cpp

@@ -75,7 +75,7 @@ void CPropertyView::SetEditor(CWorldEditor *pEditor)
 {
     mpEditor = pEditor;
     mpDelegate->SetEditor(pEditor);
-    connect(mpEditor, SIGNAL(PropertyModified(IProperty*,bool)), mpModel, SLOT(NotifyPropertyModified(IProperty*)));
+    connect(mpEditor, SIGNAL(PropertyModified(CScriptObject*,IProperty*)), mpModel, SLOT(NotifyPropertyModified(CScriptObject*,IProperty*)));
 }
 
 void CPropertyView::SetInstance(CScriptObject *pObj)

src/Editor/Undo/CClearSelectionCommand.cpp

@@ -1,42 +0,0 @@
-#include "CClearSelectionCommand.h"
-#include "Editor/INodeEditor.h"
-
-CClearSelectionCommand::CClearSelectionCommand(INodeEditor *pEditor, QList<CSceneNode*>& selection)
-    : IUndoCommand("Clear Selection"),
-      mpEditor(pEditor),
-      mSelectionState(selection),
-      mpSelection(&selection)
-{
-}
-
-CClearSelectionCommand::~CClearSelectionCommand()
-{
-}
-
-void CClearSelectionCommand::undo()
-{
-    mpSelection->reserve(mSelectionState.size());
-
-    foreach (CSceneNode *pNode, mSelectionState)
-    {
-        if (!pNode->IsSelected())
-        {
-            pNode->SetSelected(true);
-            mpSelection->push_back(pNode);
-        }
-    }
-
-    mpEditor->RecalculateSelectionBounds();
-    mpEditor->NotifySelectionModified();
-}
-
-void CClearSelectionCommand::redo()
-{
-    foreach (CSceneNode *pNode, *mpSelection)
-        if (pNode->IsSelected())
-            pNode->SetSelected(false);
-
-    mpSelection->clear();
-    mpEditor->RecalculateSelectionBounds();
-    mpEditor->NotifySelectionModified();
-}

src/Editor/Undo/CClearSelectionCommand.h

@@ -7,14 +7,18 @@
 
 class CClearSelectionCommand : public IUndoCommand
 {
-    INodeEditor *mpEditor;
-    QList<CSceneNode*> mSelectionState;
-    QList<CSceneNode*> *mpSelection;
+    QList<CSceneNode*> mOldSelection;
+    CNodeSelection *mpSelection;
+
 public:
-    CClearSelectionCommand(INodeEditor *pEditor, QList<CSceneNode*>& selection);
-    ~CClearSelectionCommand();
-    void undo();
-    void redo();
+    CClearSelectionCommand(CNodeSelection *pSelection)
+        : IUndoCommand("Clear Selection"),
+          mOldSelection(pSelection->SelectedNodeList()),
+          mpSelection(pSelection)
+    {}
+
+    void undo() { mpSelection->SetSelectedNodes(mOldSelection); }
+    void redo() { mpSelection->Clear(); }
     bool AffectsCleanState() const { return false; }
 };
 

src/Editor/Undo/CCreateInstanceCommand.cpp

@@ -0,0 +1,39 @@
+#include "CCreateInstanceCommand.h"
+
+CCreateInstanceCommand::CCreateInstanceCommand(CWorldEditor *pEditor, CScriptTemplate *pTemplate, CScriptLayer *pLayer, const CVector3f& rkPosition)
+    : IUndoCommand("Create Instance")
+    , mpEditor(pEditor)
+    , mpScene(pEditor->Scene())
+    , mpArea(pEditor->ActiveArea())
+    , mpTemplate(pTemplate)
+    , mLayerIndex(pLayer->AreaIndex())
+    , mSpawnPosition(rkPosition)
+    , mOldSelection(pEditor->Selection()->SelectedNodeList())
+    , mpNewInstance(nullptr)
+    , mpNewNode(nullptr)
+{
+}
+
+void CCreateInstanceCommand::undo()
+{
+    mpEditor->NotifyNodeAboutToBeDeleted(mpNewNode);
+    mpEditor->Selection()->SetSelectedNodes(mOldSelection);
+    mpScene->DeleteNode(mpNewNode);
+    mpArea->DeleteInstance(mpNewInstance);
+    mpNewNode = nullptr;
+    mpNewInstance = nullptr;
+    mpEditor->NotifyNodeDeleted();
+}
+
+void CCreateInstanceCommand::redo()
+{
+    mpEditor->NotifyNodeAboutToBeSpawned();
+
+    CScriptLayer *pLayer = (mLayerIndex == -1 ? mpArea->GetGeneratorLayer() : mpArea->GetScriptLayer(mLayerIndex));
+    mpNewInstance = mpArea->SpawnInstance(mpTemplate, pLayer, mSpawnPosition);
+    mpNewNode = mpScene->CreateScriptNode(mpNewInstance);
+    mpNewNode->SetPosition(mSpawnPosition);
+
+    mpEditor->NotifyNodeSpawned(mpNewNode);
+    mpEditor->Selection()->ClearAndSelectNode(mpNewNode);
+}

src/Editor/Undo/CCreateInstanceCommand.h

@@ -0,0 +1,32 @@
+#ifndef CCREATEINSTANCECOMMAND_H
+#define CCREATEINSTANCECOMMAND_H
+
+#include "IUndoCommand.h"
+#include "CClearSelectionCommand.h"
+#include "CSelectNodeCommand.h"
+#include "Editor/WorldEditor/CWorldEditor.h"
+#include <Core/Resource/CGameArea.h>
+#include <Core/Resource/Script/CScriptLayer.h>
+#include <Core/Resource/Script/CScriptObject.h>
+
+class CCreateInstanceCommand : public IUndoCommand
+{
+    CWorldEditor *mpEditor;
+    CScene *mpScene;
+    CGameArea *mpArea;
+    CScriptTemplate *mpTemplate;
+    u32 mLayerIndex;
+    CVector3f mSpawnPosition;
+
+    QList<CSceneNode*> mOldSelection;
+    CScriptObject *mpNewInstance;
+    CScriptNode *mpNewNode;
+
+public:
+    CCreateInstanceCommand(CWorldEditor *pEditor, CScriptTemplate *pTemplate, CScriptLayer *pLayer, const CVector3f& rkPosition);
+    void undo();
+    void redo();
+    bool AffectsCleanState() const { return true; }
+};
+
+#endif // CCREATEINSTANCECOMMAND_H

src/Editor/Undo/CDeleteSelectionCommand.cpp

@@ -0,0 +1,38 @@
+#include "CDeleteSelectionCommand.h"
+#include "Editor/CSelectionIterator.h"
+
+CDeleteSelectionCommand::CDeleteSelectionCommand(CWorldEditor *pEditor)
+    : IUndoCommand("Delete")
+    , mpEditor(pEditor)
+{
+    mOldSelection = pEditor->Selection()->SelectedNodeList();
+
+    for (CSelectionIterator It(pEditor->Selection()); It; ++It)
+    {
+        if (It->NodeType() == eScriptNode)
+            mNodesToDelete << *It;
+        else
+            mNewSelection << *It;
+    }
+}
+
+void CDeleteSelectionCommand::undo()
+{
+    //foreach (CSceneNode *pNode, mNodesToDelete)
+    //    pNode->SetDeleted(false);
+    //mpEditor->Selection()->SetSelectedNodes(mOldSelection);
+}
+
+void CDeleteSelectionCommand::redo()
+{
+    mpEditor->Selection()->SetSelectedNodes(mNewSelection);
+
+    foreach (CSceneNode *pNode, mNodesToDelete)
+    {
+        CScriptObject *pInst = static_cast<CScriptNode*>(pNode)->Object();
+        mpEditor->NotifyNodeAboutToBeDeleted(pNode);
+        mpEditor->Scene()->DeleteNode(pNode);
+        mpEditor->ActiveArea()->DeleteInstance(pInst);
+        mpEditor->NotifyNodeDeleted();
+    }
+}

src/Editor/Undo/CDeleteSelectionCommand.h

@@ -0,0 +1,22 @@
+#ifndef CDELETESELECTIONCOMMAND_H
+#define CDELETESELECTIONCOMMAND_H
+
+#include "IUndoCommand.h"
+#include "Editor/WorldEditor/CWorldEditor.h"
+#include <Core/Scene/CSceneNode.h>
+
+class CDeleteSelectionCommand : public IUndoCommand
+{
+    CWorldEditor *mpEditor;
+    QList<CSceneNode*> mNodesToDelete;
+    QList<CSceneNode*> mOldSelection;
+    QList<CSceneNode*> mNewSelection;
+
+public:
+    CDeleteSelectionCommand(CWorldEditor *pEditor);
+    void undo();
+    void redo();
+    bool AffectsCleanState() const { return true; }
+};
+
+#endif // CDELETESELECTIONCOMMAND_H

src/Editor/Undo/CDeselectNodeCommand.cpp

@@ -1,42 +0,0 @@
-#include "CDeselectNodeCommand.h"
-#include "Editor/INodeEditor.h"
-
-CDeselectNodeCommand::CDeselectNodeCommand(INodeEditor *pEditor, CSceneNode *pNode, QList<CSceneNode*>& selection)
-    : IUndoCommand("Deselect"),
-      mpEditor(pEditor),
-      mpNode(pNode),
-      mpSelection(&selection)
-{
-}
-
-void CDeselectNodeCommand::undo()
-{
-    if (!mpNode->IsSelected())
-    {
-        mpNode->SetSelected(true);
-        mpSelection->push_back(mpNode);
-    }
-
-    mpEditor->ExpandSelectionBounds(mpNode);
-    mpEditor->NotifySelectionModified();
-}
-
-void CDeselectNodeCommand::redo()
-{
-    if (mpNode->IsSelected())
-    {
-        mpNode->SetSelected(false);
-
-        for (auto it = mpSelection->begin(); it != mpSelection->end(); it++)
-        {
-            if (*it == mpNode)
-            {
-                mpSelection->erase(it);
-                break;
-            }
-        }
-    }
-
-    mpEditor->RecalculateSelectionBounds();
-    mpEditor->NotifySelectionModified();
-}

src/Editor/Undo/CDeselectNodeCommand.h

@@ -7,13 +7,17 @@
 
 class CDeselectNodeCommand : public IUndoCommand
 {
-    INodeEditor *mpEditor;
     CSceneNode *mpNode;
-    QList<CSceneNode*> *mpSelection;
+    CNodeSelection *mpSelection;
 public:
-    CDeselectNodeCommand(INodeEditor *pEditor, CSceneNode *pNode, QList<CSceneNode*>& selection);
-    void undo();
-    void redo();
+    CDeselectNodeCommand(CNodeSelection *pSelection, CSceneNode *pNode)
+        : IUndoCommand("Deselect")
+        , mpNode(pNode)
+        , mpSelection(pSelection)
+    {}
+
+    void undo() { mpSelection->SelectNode(mpNode); }
+    void redo() { mpSelection->DeselectNode(mpNode); }
     bool AffectsCleanState() const { return false; }
 };
 

src/Editor/Undo/CInvertSelectionCommand.cpp

@@ -1,56 +0,0 @@
-#include "CInvertSelectionCommand.h"
-#include <Core/Scene/CSceneIterator.h>
-
-CInvertSelectionCommand::CInvertSelectionCommand(INodeEditor *pEditor, QList<CSceneNode*>& rSelection, CScene *pScene, FNodeFlags NodeFlags)
-    : IUndoCommand("Invert Selection")
-    , mpEditor(pEditor)
-    , mOldSelection(rSelection)
-    , mpSelection(&rSelection)
-{
-    CSceneIterator it(pScene, NodeFlags);
-
-    while (!it.DoneIterating())
-    {
-        if (!it->IsSelected())
-            mNewSelection.append(*it);
-        ++it;
-    }
-}
-
-CInvertSelectionCommand::~CInvertSelectionCommand()
-{
-}
-
-void CInvertSelectionCommand::undo()
-{
-    *mpSelection = mOldSelection;
-
-    // Deselect all nodes in new selection
-    foreach (CSceneNode *pNode, mNewSelection)
-        pNode->SetSelected(false);
-
-    // Select all nodes in the old selection
-    foreach (CSceneNode *pNode, mOldSelection)
-        pNode->SetSelected(true);
-
-    // Update editor
-    mpEditor->RecalculateSelectionBounds();
-    mpEditor->NotifySelectionModified();
-}
-
-void CInvertSelectionCommand::redo()
-{
-    *mpSelection = mNewSelection;
-
-    // Deselect all nodes in the old selection
-    foreach (CSceneNode *pNode, mOldSelection)
-        pNode->SetSelected(false);
-
-    // Select all nodes in the new selection
-    foreach (CSceneNode *pNode, mNewSelection)
-        pNode->SetSelected(true);
-
-    // Update editor
-    mpEditor->RecalculateSelectionBounds();
-    mpEditor->NotifySelectionModified();
-}

src/Editor/Undo/CInvertSelectionCommand.h

@@ -7,17 +7,27 @@
 
 class CInvertSelectionCommand : public IUndoCommand
 {
-    INodeEditor *mpEditor;
+    CNodeSelection *mpSelection;
     QList<CSceneNode*> mOldSelection;
     QList<CSceneNode*> mNewSelection;
-    QList<CSceneNode*> *mpSelection;
 
 public:
-    CInvertSelectionCommand(INodeEditor *pEditor, QList<CSceneNode*>& rSelection, CScene *pScene, FNodeFlags NodeFlags);
-    ~CInvertSelectionCommand();
-    void undo();
-    void redo();
-    virtual bool AffectsCleanState() const { return false; }
+    CInvertSelectionCommand(CNodeSelection *pSelection, CScene *pScene, FNodeFlags NodeFlags)
+        : IUndoCommand("Invert Selection")
+        , mpSelection(pSelection)
+    {
+        for (CSceneIterator It(pScene, NodeFlags); It; ++It)
+        {
+            if (It->IsSelected())
+                mOldSelection << *It;
+            else
+                mNewSelection << *It;
+        }
+    }
+
+    void undo() { mpSelection->SetSelectedNodes(mOldSelection); }
+    void redo() { mpSelection->SetSelectedNodes(mNewSelection); }
+    bool AffectsCleanState() const { return false; }
 };
 
 #endif // CINVERTSELECTIONCOMMAND_H

src/Editor/Undo/CRotateNodeCommand.cpp

@@ -79,7 +79,6 @@ void CRotateNodeCommand::undo()
         rotate.pNode->SetRotation(rotate.initialRot);
     }
 
-    mpEditor->RecalculateSelectionBounds();
     mpEditor->NotifySelectionTransformed();
     mpEditor->UpdateGizmoUI();
 }
@@ -94,7 +93,6 @@ void CRotateNodeCommand::redo()
         rotate.pNode->SetRotation(rotate.newRot);
     }
 
-    mpEditor->RecalculateSelectionBounds();
     mpEditor->NotifySelectionTransformed();
     mpEditor->UpdateGizmoUI();
 }

src/Editor/Undo/CScaleNodeCommand.cpp

@@ -79,7 +79,6 @@ void CScaleNodeCommand::undo()
         scale.pNode->SetScale(scale.initialScale);
     }
 
-    mpEditor->RecalculateSelectionBounds();
     mpEditor->NotifySelectionTransformed();
     mpEditor->UpdateGizmoUI();
 }
@@ -94,7 +93,6 @@ void CScaleNodeCommand::redo()
         scale.pNode->SetScale(scale.newScale);
     }
 
-    mpEditor->RecalculateSelectionBounds();
     mpEditor->NotifySelectionTransformed();
     mpEditor->UpdateGizmoUI();
 }

src/Editor/Undo/CSelectAllCommand.cpp

@@ -1,56 +0,0 @@
-#include "CSelectAllCommand.h"
-#include <Core/Scene/CSceneIterator.h>
-
-CSelectAllCommand::CSelectAllCommand(INodeEditor *pEditor, QList<CSceneNode *> &rSelection, CScene *pScene, FNodeFlags NodeFlags)
-    : IUndoCommand("Select All")
-    , mpEditor(pEditor)
-    , mOldSelection(rSelection)
-    , mpSelection(&rSelection)
-{
-    CSceneIterator it(pScene, NodeFlags);
-
-    while (!it.DoneIterating())
-    {
-        mNewSelection.append(*it);
-        ++it;
-    }
-}
-
-CSelectAllCommand::~CSelectAllCommand()
-{
-}
-
-
-void CSelectAllCommand::undo()
-{
-    *mpSelection = mOldSelection;
-
-    // Deselect all nodes in new selection
-    foreach (CSceneNode *pNode, mNewSelection)
-        pNode->SetSelected(false);
-
-    // Select all nodes in the old selection
-    foreach (CSceneNode *pNode, mOldSelection)
-        pNode->SetSelected(true);
-
-    // Update editor
-    mpEditor->RecalculateSelectionBounds();
-    mpEditor->NotifySelectionModified();
-}
-
-void CSelectAllCommand::redo()
-{
-    *mpSelection = mNewSelection;
-
-    // Deselect all nodes in the old selection
-    foreach (CSceneNode *pNode, mOldSelection)
-        pNode->SetSelected(false);
-
-    // Select all nodes in the new selection
-    foreach (CSceneNode *pNode, mNewSelection)
-        pNode->SetSelected(true);
-
-    // Update editor
-    mpEditor->RecalculateSelectionBounds();
-    mpEditor->NotifySelectionModified();
-}

src/Editor/Undo/CSelectAllCommand.h

@@ -7,16 +7,22 @@
 
 class CSelectAllCommand : public IUndoCommand
 {
-    INodeEditor *mpEditor;
     QList<CSceneNode*> mOldSelection;
     QList<CSceneNode*> mNewSelection;
-    QList<CSceneNode*> *mpSelection;
+    CNodeSelection *mpSelection;
 
 public:
-    CSelectAllCommand(INodeEditor *pEditor, QList<CSceneNode*>& rSelection, CScene *pScene, FNodeFlags NodeFlags);
-    ~CSelectAllCommand();
-    void undo();
-    void redo();
+    CSelectAllCommand(CNodeSelection *pSelection, CScene *pScene, FNodeFlags NodeFlags)
+        : IUndoCommand("Select All")
+        , mOldSelection(pSelection->SelectedNodeList())
+        , mpSelection(pSelection)
+    {
+        for (CSceneIterator It(pScene, NodeFlags); It; ++It)
+            mNewSelection << *It;
+    }
+
+    void undo() { mpSelection->SetSelectedNodes(mOldSelection); }
+    void redo() { mpSelection->SetSelectedNodes(mNewSelection); }
     bool AffectsCleanState() const { return false; }
 };
 

src/Editor/Undo/CSelectNodeCommand.cpp

@@ -1,42 +0,0 @@
-#include "CSelectNodeCommand.h"
-#include "Editor/INodeEditor.h"
-
-CSelectNodeCommand::CSelectNodeCommand(INodeEditor *pEditor, CSceneNode *pNode, QList<CSceneNode*>& selection)
-    : IUndoCommand("Select"),
-      mpEditor(pEditor),
-      mpNode(pNode),
-      mpSelection(&selection)
-{
-}
-
-void CSelectNodeCommand::undo()
-{
-    if (mpNode->IsSelected())
-    {
-        mpNode->SetSelected(false);
-
-        for (auto it = mpSelection->begin(); it != mpSelection->end(); it++)
-        {
-            if (*it == mpNode)
-            {
-                mpSelection->erase(it);
-                break;
-            }
-        }
-    }
-
-    mpEditor->RecalculateSelectionBounds();
-    mpEditor->NotifySelectionModified();
-}
-
-void CSelectNodeCommand::redo()
-{
-    if (!mpNode->IsSelected())
-    {
-        mpNode->SetSelected(true);
-        mpSelection->push_back(mpNode);
-    }
-
-    mpEditor->ExpandSelectionBounds(mpNode);
-    mpEditor->NotifySelectionModified();
-}

src/Editor/Undo/CSelectNodeCommand.h

@@ -7,13 +7,18 @@
 
 class CSelectNodeCommand : public IUndoCommand
 {
-    INodeEditor *mpEditor;
     CSceneNode *mpNode;
-    QList<CSceneNode*> *mpSelection;
+    CNodeSelection *mpSelection;
+
 public:
-    CSelectNodeCommand(INodeEditor *pEditor, CSceneNode *pNode, QList<CSceneNode*>& selection);
-    void undo();
-    void redo();
+    CSelectNodeCommand(CNodeSelection *pSelection, CSceneNode *pNode)
+        : IUndoCommand("Select")
+        , mpNode(pNode)
+        , mpSelection(pSelection)
+    {}
+
+    void undo() { mpSelection->DeselectNode(mpNode); }
+    void redo() { mpSelection->SelectNode(mpNode); }
     bool AffectsCleanState() const { return false; }
 };
 

src/Editor/Undo/CTranslateNodeCommand.cpp

@@ -71,7 +71,6 @@ void CTranslateNodeCommand::undo()
     foreach (SNodeTranslate translate, mNodeList)
         translate.pNode->SetPosition(translate.initialPos);
 
-    mpEditor->RecalculateSelectionBounds();
     mpEditor->NotifySelectionTransformed();
     mpEditor->UpdateGizmoUI();
 }
@@ -83,7 +82,6 @@ void CTranslateNodeCommand::redo()
     foreach (SNodeTranslate translate, mNodeList)
         translate.pNode->SetPosition(translate.newPos);
 
-    mpEditor->RecalculateSelectionBounds();
     mpEditor->NotifySelectionTransformed();
     mpEditor->UpdateGizmoUI();
 }

src/Editor/Undo/UndoCommands.h

@@ -1,6 +1,8 @@
 #ifndef UNDOCOMMANDS
 #define UNDOCOMMANDS
 
+#include "CCreateInstanceCommand.h"
+
 #include "CTranslateNodeCommand.h"
 #include "CRotateNodeCommand.h"
 #include "CScaleNodeCommand.h"
@@ -10,6 +12,7 @@
 #include "CClearSelectionCommand.h"
 #include "CSelectAllCommand.h"
 #include "CInvertSelectionCommand.h"
+#include "CDeleteSelectionCommand.h"
 
 #include "CEditScriptPropertyCommand.h"
 #include "CResizeScriptArrayCommand.h"

src/Editor/WorldEditor/CInstancesModel.cpp

@@ -26,11 +26,6 @@
 #define TYPES_NODE_TYPE_SHIFT 1
 #define TYPES_ITEM_TYPE_SHIFT 0
 
-bool SortTemplatesAlphabetical(CScriptTemplate *pA, CScriptTemplate *pB)
-{
-    return (pA->Name() < pB->Name());
-}
-
 CInstancesModel::CInstancesModel(QObject *pParent) : QAbstractItemModel(pParent)
 {
     mpEditor = nullptr;
@@ -40,6 +35,7 @@ CInstancesModel::CInstancesModel(QObject *pParent) : QAbstractItemModel(pParent)
     mModelType = eLayers;
     mShowColumnEnabled = true;
     mBaseItems << "Script";
+    mAddingOrRemovingRows = false;
 }
 
 CInstancesModel::~CInstancesModel()
@@ -319,6 +315,11 @@ void CInstancesModel::SetEditor(CWorldEditor *pEditor)
 
     mpEditor = pEditor;
     mpScene = (pEditor ? pEditor->Scene() : nullptr);
+    connect(mpEditor, SIGNAL(NodeAboutToBeSpawned()), this, SLOT(NodeAboutToBeCreated()));
+    connect(mpEditor, SIGNAL(NodeSpawned(CSceneNode*)), this, SLOT(NodeCreated(CSceneNode*)));
+    connect(mpEditor, SIGNAL(NodeAboutToBeDeleted(CSceneNode*)), this, SLOT(NodeAboutToBeDeleted(CSceneNode*)));
+    connect(mpEditor, SIGNAL(NodeDeleted()), this, SLOT(NodeDeleted()));
+    connect(mpEditor, SIGNAL(PropertyModified(CScriptObject*,IProperty*)), this, SLOT(PropertyModified(CScriptObject*,IProperty*)));
     connect(mpEditor, SIGNAL(InstancesLayerAboutToChange()), this, SLOT(InstancesLayerPreChange()));
     connect(mpEditor, SIGNAL(InstancesLayerChanged(QList<CScriptNode*>)), this, SLOT(InstancesLayerPostChange(QList<CScriptNode*>)));
 }
@@ -347,52 +348,6 @@ void CInstancesModel::SetShowColumnEnabled(bool Enabled)
     emit layoutChanged();
 }
 
-void CInstancesModel::NodeCreated(CSceneNode *pNode)
-{
-    if (mModelType == eTypes)
-    {
-        if (pNode->NodeType() == eScriptNode)
-        {
-            CScriptNode *pScript = static_cast<CScriptNode*>(pNode);
-            CScriptObject *pObj = pScript->Object();
-            pObj->Template()->SortObjects();
-
-            if (pObj->Template()->NumObjects() == 1)
-            {
-                mTemplateList << pObj->Template();
-                qSort(mTemplateList.begin(), mTemplateList.end(), SortTemplatesAlphabetical);
-                emit layoutChanged();
-            }
-        }
-    }
-}
-
-void CInstancesModel::NodeDeleted(CSceneNode *pNode)
-{
-    if (mModelType = eTypes)
-    {
-        if (pNode->NodeType() == eScriptNode)
-        {
-            CScriptNode *pScript = static_cast<CScriptNode*>(pNode);
-            CScriptObject *pObj = pScript->Object();
-
-            if (pObj->Template()->NumObjects() == 0)
-            {
-                for (auto it = mTemplateList.begin(); it != mTemplateList.end(); it++)
-                {
-                    if (*it == pObj->Template())
-                    {
-                        mTemplateList.erase(it);
-                        break;
-                    }
-                }
-
-                emit layoutChanged();
-            }
-        }
-    }
-}
-
 CScriptLayer* CInstancesModel::IndexLayer(const QModelIndex& index) const
 {
     if ((mModelType != eLayers) || (IndexNodeType(index) != eScriptType) || (IndexType(index) != eObjectTypeIndex))
@@ -420,6 +375,107 @@ CScriptObject* CInstancesModel::IndexObject(const QModelIndex& index) const
 }
 
 // ************ PUBLIC SLOTS ************
+void CInstancesModel::NodeAboutToBeCreated()
+{
+    if (!mAddingOrRemovingRows)
+    {
+        emit layoutAboutToBeChanged();
+        mAddingOrRemovingRows = true;
+    }
+}
+
+void CInstancesModel::NodeCreated(CSceneNode *pNode)
+{
+    if (mModelType == eTypes)
+    {
+        if (pNode->NodeType() == eScriptNode)
+        {
+            CScriptNode *pScript = static_cast<CScriptNode*>(pNode);
+            CScriptObject *pObj = pScript->Object();
+            pObj->Template()->SortObjects();
+
+            if (pObj->Template()->NumObjects() == 1)
+            {
+                QModelIndex ScriptRootIdx = index(0, 0, QModelIndex());
+                int NewIndex = 0;
+
+                for (; NewIndex < mTemplateList.size(); NewIndex++)
+                {
+                    if (mTemplateList[NewIndex]->Name() > pObj->Template()->Name())
+                        break;
+                }
+
+                beginInsertRows(ScriptRootIdx, NewIndex, NewIndex);
+                mTemplateList.insert(NewIndex, pObj->Template());
+                endInsertRows();
+            }
+        }
+    }
+
+    emit layoutChanged();
+    mAddingOrRemovingRows = false;
+}
+
+void CInstancesModel::NodeAboutToBeDeleted(CSceneNode *pNode)
+{
+    if (!mAddingOrRemovingRows)
+    {
+        emit layoutAboutToBeChanged();
+        mAddingOrRemovingRows = true;
+    }
+
+    if (mModelType == eTypes)
+    {
+        if (pNode->NodeType() == eScriptNode)
+        {
+            CScriptNode *pScript = static_cast<CScriptNode*>(pNode);
+            CScriptObject *pObj = pScript->Object();
+
+            if (pObj->Template()->NumObjects() <= 1)
+            {
+                QModelIndex ScriptRootIdx = index(0, 0, QModelIndex());
+                int TempIdx = mTemplateList.indexOf(pObj->Template());
+                beginRemoveRows(ScriptRootIdx, TempIdx, TempIdx);
+                mTemplateList.removeOne(pObj->Template());
+                endRemoveRows();
+            }
+        }
+    }
+}
+
+void CInstancesModel::NodeDeleted()
+{
+    emit layoutChanged();
+    mAddingOrRemovingRows = false;
+}
+
+void CInstancesModel::PropertyModified(CScriptObject *pInst, IProperty *pProp)
+{
+    if (pInst->InstanceNameProperty() == pProp)
+    {
+        QModelIndex ScriptRoot = index(0, 0, QModelIndex());
+
+        if (mModelType == eLayers)
+        {
+            u32 Index = pInst->Layer()->AreaIndex();
+            QModelIndex LayerIndex = index(Index, 0, ScriptRoot);
+            QModelIndex InstIndex = index(pInst->LayerIndex(), 0, LayerIndex);
+            emit dataChanged(InstIndex, InstIndex);
+        }
+
+        else
+        {
+            u32 Index = mTemplateList.indexOf(pInst->Template());
+            QModelIndex TempIndex = index(Index, 0, ScriptRoot);
+
+            QList<CScriptObject*> InstList = QList<CScriptObject*>::fromStdList(pInst->Template()->ObjectList());
+            u32 InstIdx = InstList.indexOf(pInst);
+            QModelIndex InstIndex = index(InstIdx, 0, TempIndex);
+            emit dataChanged(InstIndex, InstIndex);
+        }
+    }
+}
+
 void CInstancesModel::InstancesLayerPreChange()
 {
     // This is only really needed on layers, which have rows moved.
@@ -501,7 +557,9 @@ void CInstancesModel::GenerateList()
                 mTemplateList << pTemp;
         }
 
-        qSort(mTemplateList.begin(), mTemplateList.end(), SortTemplatesAlphabetical);
+        qSort(mTemplateList.begin(), mTemplateList.end(), [](CScriptTemplate *pLeft, CScriptTemplate *pRight) -> bool {
+            return (pLeft->Name() < pRight->Name());
+        });
     }
 
     endResetModel();

src/Editor/WorldEditor/CInstancesModel.h

@@ -37,6 +37,7 @@ private:
     QList<CScriptTemplate*> mTemplateList;
     QStringList mBaseItems;
     bool mShowColumnEnabled;
+    bool mAddingOrRemovingRows;
 
 public:
     explicit CInstancesModel(QObject *pParent = 0);
@@ -53,13 +54,17 @@ public:
     void SetArea(CGameArea *pArea);
     void SetModelType(EInstanceModelType type);
     void SetShowColumnEnabled(bool Enabled);
-    void NodeCreated(CSceneNode *pNode);
-    void NodeDeleted(CSceneNode *pNode);
     CScriptLayer* IndexLayer(const QModelIndex& index) const;
     CScriptTemplate* IndexTemplate(const QModelIndex& index) const;
     CScriptObject* IndexObject(const QModelIndex& index) const;
 
 public slots:
+    void NodeAboutToBeCreated();
+    void NodeCreated(CSceneNode *pNode);
+    void NodeAboutToBeDeleted(CSceneNode *pNode);
+    void NodeDeleted();
+
+    void PropertyModified(CScriptObject *pInst, IProperty *pProp);
     void InstancesLayerPreChange();
     void InstancesLayerPostChange(const QList<CScriptNode*>& rkInstanceList);
 

src/Editor/WorldEditor/CLinkModel.cpp

@@ -48,7 +48,7 @@ QVariant CLinkModel::data(const QModelIndex &index, int role) const
         case 0: // Column 0 - Target Object
         {
             u32 TargetID = (mType == eIncoming ? pLink->SenderID() : pLink->ReceiverID());
-            CScriptObject *pTarget = mpObject->Area()->GetInstanceByID(TargetID);
+            CScriptObject *pTarget = mpObject->Area()->InstanceByID(TargetID);
 
             if (pTarget) {
                 QString ObjType = QString("[%1] ").arg(UICommon::ToQString(pTarget->Template()->Name()));

src/Editor/WorldEditor/CPoiMapModel.cpp

@@ -69,7 +69,7 @@ QVariant CPoiMapModel::data(const QModelIndex& rkIndex, int Role) const
     if (rkIndex.row() < rowCount(QModelIndex()))
     {
         const CPoiToWorld::SPoiMap *pkMap = mpPoiToWorld->MapByIndex(rkIndex.row());
-        CScriptObject *pPOI = mpArea->GetInstanceByID(pkMap->PoiID);
+        CScriptObject *pPOI = mpArea->InstanceByID(pkMap->PoiID);
 
         if (Role == Qt::DisplayRole)
         {

src/Editor/WorldEditor/CTemplateListView.h

@@ -0,0 +1,124 @@
+#ifndef CTEMPLATELISTVIEW
+#define CTEMPLATELISTVIEW
+
+#include "CTemplateMimeData.h"
+#include "Editor/UICommon.h"
+#include <Core/Resource/Script/CMasterTemplate.h>
+#include <QAbstractListModel>
+#include <QDrag>
+#include <QListView>
+
+class CTemplateListModel : public QAbstractListModel
+{
+    Q_OBJECT
+    CMasterTemplate *mpMaster;
+    QList<CScriptTemplate*> mTemplates;
+
+public:
+    CTemplateListModel(QObject *pParent = 0)
+        : QAbstractListModel(pParent)
+    {}
+
+    int rowCount(const QModelIndex&) const
+    {
+        return mTemplates.size();
+    }
+
+    QVariant data(const QModelIndex& rkIndex, int Role) const
+    {
+        if (Role == Qt::DisplayRole || Role == Qt::ToolTipRole)
+            return TO_QSTRING(mTemplates[rkIndex.row()]->Name());
+        else
+            return QVariant::Invalid;
+    }
+
+    Qt::DropActions supportedDropActions() const
+    {
+        return Qt::IgnoreAction;
+    }
+
+    Qt::DropActions supportedDragActions() const
+    {
+        return Qt::MoveAction;
+    }
+
+    QMimeData* mimeData(const QModelIndexList& rkIndices) const
+    {
+        if (rkIndices.size() != 1) return nullptr;
+        QModelIndex Index = rkIndices.front();
+        CScriptTemplate *pTemp = TemplateForIndex(Index);
+        return new CTemplateMimeData(pTemp);
+    }
+
+    Qt::ItemFlags flags(const QModelIndex&) const
+    {
+        return Qt::ItemIsSelectable | Qt::ItemIsDragEnabled | Qt::ItemIsEnabled;
+    }
+
+    void SetMaster(CMasterTemplate *pMaster)
+    {
+        beginResetModel();
+
+        mpMaster = pMaster;
+        mTemplates.clear();
+
+        for (u32 iTemp = 0; iTemp < mpMaster->NumScriptTemplates(); iTemp++)
+            mTemplates << mpMaster->TemplateByIndex(iTemp);
+
+        qSort(mTemplates.begin(), mTemplates.end(), [](CScriptTemplate *pLeft, CScriptTemplate *pRight) -> bool {
+            return pLeft->Name() < pRight->Name();
+        });
+
+        endResetModel();
+    }
+
+    inline CScriptTemplate* TemplateForIndex(const QModelIndex& rkIndex) const
+    {
+        return mTemplates[rkIndex.row()];
+    }
+};
+
+class CTemplateListView : public QListView
+{
+    Q_OBJECT
+    CTemplateListModel *mpModel;
+
+public:
+    CTemplateListView(QWidget *pParent = 0)
+        : QListView(pParent)
+    {
+        setModel(new CTemplateListModel(this));
+    }
+
+    void setModel(QAbstractItemModel *pModel)
+    {
+        if (CTemplateListModel *pTempModel = qobject_cast<CTemplateListModel*>(pModel))
+            mpModel = pTempModel;
+        else
+            mpModel = nullptr;
+
+        QListView::setModel(mpModel);
+    }
+
+    inline void SetMaster(CMasterTemplate *pMaster)
+    {
+        if (mpModel) mpModel->SetMaster(pMaster);
+    }
+
+protected:
+    void startDrag(Qt::DropActions)
+    {
+        QModelIndexList Selection = selectionModel()->selectedRows();
+
+        if (Selection.size() == 1 && mpModel)
+        {
+            QDrag *pDrag = new QDrag(this);
+            pDrag->setMimeData(mpModel->mimeData(Selection));
+            pDrag->setPixmap(QPixmap());
+            pDrag->exec();
+        }
+    }
+};
+
+#endif // CTEMPLATELISTVIEW
+

src/Editor/WorldEditor/CTemplateMimeData.h

@@ -0,0 +1,20 @@
+#ifndef CTEMPLATEMIMEDATA_H
+#define CTEMPLATEMIMEDATA_H
+
+#include <Core/Resource/Script/CScriptTemplate.h>
+#include <QMimeData>
+
+class CTemplateMimeData : public QMimeData
+{
+    Q_OBJECT
+    CScriptTemplate *mpTemplate;
+
+public:
+    CTemplateMimeData(CScriptTemplate *pTemplate)
+        : mpTemplate(pTemplate)
+    {}
+
+    inline CScriptTemplate* Template() const { return mpTemplate; }
+};
+
+#endif // CTEMPLATEMIMEDATA_H

src/Editor/WorldEditor/CWorldEditor.cpp

@@ -1,17 +1,18 @@
 #include "CWorldEditor.h"
 #include "ui_CWorldEditor.h"
-
 #include "CConfirmUnlinkDialog.h"
 #include "CLayerEditor.h"
+#include "CTemplateMimeData.h"
 #include "WModifyTab.h"
 #include "WInstancesTab.h"
 
 #include "Editor/CBasicViewport.h"
+#include "Editor/CSelectionIterator.h"
+#include "Editor/UICommon.h"
 #include "Editor/PropertyEdit/CPropertyView.h"
 #include "Editor/Widgets/WDraggableSpinBox.h"
 #include "Editor/Widgets/WVectorEditor.h"
 #include "Editor/Undo/UndoCommands.h"
-#include "Editor/UICommon.h"
 
 #include <Core/Render/CDrawUtil.h>
 #include <Core/Resource/Cooker/CAreaCooker.h>
@@ -38,7 +39,7 @@ CWorldEditor::CWorldEditor(QWidget *parent)
     Log::Write("Creating World Editor");
     ui->setupUi(this);
 
-    mSelectionNodeFlags = eScriptNode | eLightNode;
+    mpSelection->SetAllowedNodeTypes(eScriptNode | eLightNode);
 
     // Start refresh timer
     connect(&mRefreshTimer, SIGNAL(timeout()), this, SLOT(RefreshViewport()));
@@ -51,6 +52,7 @@ CWorldEditor::CWorldEditor(QWidget *parent)
 
     // Initialize UI stuff
     ui->MainViewport->SetScene(this, &mScene);
+    ui->CreateTabContents->SetEditor(this);
     ui->ModifyTabContents->SetEditor(this);
     ui->InstancesTabContents->SetEditor(this, &mScene);
     ui->TransformSpinBox->SetOrientation(Qt::Horizontal);
@@ -66,6 +68,7 @@ CWorldEditor::CWorldEditor(QWidget *parent)
     // Initialize actions
     addAction(ui->ActionIncrementGizmo);
     addAction(ui->ActionDecrementGizmo);
+    addAction(ui->ActionDelete);
 
     QAction *pToolBarUndo = mUndoStack.createUndoAction(this);
     pToolBarUndo->setIcon(QIcon(":/icons/Undo.png"));
@@ -93,6 +96,7 @@ CWorldEditor::CWorldEditor(QWidget *parent)
     connect(ui->CamSpeedSpinBox, SIGNAL(valueChanged(double)), this, SLOT(OnCameraSpeedChange(double)));
     connect(ui->ActionLink, SIGNAL(toggled(bool)), this, SLOT(OnLinkButtonToggled(bool)));
     connect(ui->ActionUnlink, SIGNAL(triggered()), this, SLOT(OnUnlinkClicked()));
+    connect(ui->ActionDelete, SIGNAL(triggered()), this, SLOT(DeleteSelection()));
     connect(&mUndoStack, SIGNAL(indexChanged(int)), this, SLOT(OnUndoStackIndexChanged()));
 
     connect(ui->ActionSave, SIGNAL(triggered()), this, SLOT(Save()));
@@ -100,6 +104,7 @@ CWorldEditor::CWorldEditor(QWidget *parent)
     ui->CreateTabEditorProperties->SyncToEditor(this);
     ui->ModifyTabEditorProperties->SyncToEditor(this);
     ui->InstancesTabEditorProperties->SyncToEditor(this);
+    ui->MainViewport->setAcceptDrops(true);
 }
 
 CWorldEditor::~CWorldEditor()
@@ -127,12 +132,7 @@ void CWorldEditor::closeEvent(QCloseEvent *pEvent)
     }
 }
 
-bool CWorldEditor::eventFilter(QObject * /*pObj*/, QEvent * /*pEvent*/)
-{
-    return false;
-}
-
-void CWorldEditor::SetArea(CWorld *pWorld, CGameArea *pArea, u32 AreaIndex)
+void CWorldEditor::SetArea(CWorld *pWorld, CGameArea *pArea)
 {
     ExitPickMode();
     ui->MainViewport->ResetHover();
@@ -181,6 +181,7 @@ void CWorldEditor::SetArea(CWorld *pWorld, CGameArea *pArea, u32 AreaIndex)
 
     // Set up sidebar tabs
     CMasterTemplate *pMaster = CMasterTemplate::GetMasterForGame(mpArea->Version());
+    ui->CreateTabContents->SetMaster(pMaster);
     ui->InstancesTabContents->SetMaster(pMaster);
 
     // Set up dialogs
@@ -192,8 +193,8 @@ void CWorldEditor::SetArea(CWorld *pWorld, CGameArea *pArea, u32 AreaIndex)
 
     if (CurrentGame() < eReturns)
     {
-        CStringTable *pAreaNameTable = mpWorld->GetAreaName(AreaIndex);
-        TWideString AreaName = pAreaNameTable ? pAreaNameTable->GetString("ENGL", 0) : (TWideString("!") + mpWorld->GetAreaInternalName(AreaIndex).ToUTF16());
+        CStringTable *pAreaNameTable = mpWorld->GetAreaName(mpArea->WorldIndex());
+        TWideString AreaName = pAreaNameTable ? pAreaNameTable->GetString("ENGL", 0) : (TWideString("!") + mpWorld->GetAreaInternalName(mpArea->WorldIndex()).ToUTF16());
 
         if (AreaName.IsEmpty())
             AreaName = "[Untitled Area]";
@@ -206,7 +207,7 @@ void CWorldEditor::SetArea(CWorld *pWorld, CGameArea *pArea, u32 AreaIndex)
     {
         QString LevelName;
         if (pWorldNameTable) LevelName = TO_QSTRING(WorldName);
-        else LevelName = "!" + TO_QSTRING(mpWorld->GetAreaInternalName(AreaIndex));
+        else LevelName = "!" + TO_QSTRING(mpWorld->GetAreaInternalName(mpArea->WorldIndex()));
 
         setWindowTitle(QString("Prime World Editor - %1[*]").arg(LevelName));
         Log::Write("Loaded level: World " + mpWorld->Source() + " / Area " + mpArea->Source() + " (" + TO_TSTRING(LevelName) + ")");
@@ -238,7 +239,20 @@ bool CWorldEditor::CheckUnsavedChanges()
     return OkToClear;
 }
 
+CSceneViewport* CWorldEditor::Viewport() const
+{
+    return ui->MainViewport;
+}
+
 // ************ PUBLIC SLOTS ************
+void CWorldEditor::NotifyNodeAboutToBeDeleted(CSceneNode *pNode)
+{
+    INodeEditor::NotifyNodeAboutToBeDeleted(pNode);
+
+    if (ui->MainViewport->HoverNode() == pNode)
+        ui->MainViewport->ResetHover();
+}
+
 bool CWorldEditor::Save()
 {
     TString Out = mpArea->FullSource();
@@ -273,9 +287,9 @@ void CWorldEditor::OnPropertyModified(IProperty *pProp)
 {
     bool EditorProperty = false;
 
-    if (!mSelection.isEmpty() && mSelection.front()->NodeType() == eScriptNode)
+    if (!mpSelection->IsEmpty() && mpSelection->Front()->NodeType() == eScriptNode)
     {
-        CScriptNode *pScript = static_cast<CScriptNode*>(mSelection.front());
+        CScriptNode *pScript = static_cast<CScriptNode*>(mpSelection->Front());
         pScript->PropertyModified(pProp);
 
         // Check editor property
@@ -295,13 +309,13 @@ void CWorldEditor::OnPropertyModified(IProperty *pProp)
             CFileTemplate *pFile = static_cast<CFileTemplate*>(pProp->Template());
 
             if (pFile->AcceptsExtension("CMDL") || pFile->AcceptsExtension("ANCS") || pFile->AcceptsExtension("CHAR"))
-                NotifySelectionModified();
+                SelectionModified();
         }
         else if (pProp->Type() == eCharacterProperty)
-            NotifySelectionModified();
+            SelectionModified();
 
         // Emit signal so other widgets can react to the property change
-        emit PropertyModified(pProp, EditorProperty);
+        emit PropertyModified(pScript->Object(), pProp);
     }
 }
 
@@ -310,11 +324,11 @@ void CWorldEditor::SetSelectionActive(bool Active)
     // Gather list of selected objects that actually have Active properties
     QVector<CScriptObject*> Objects;
 
-    foreach (CSceneNode *pNode, mSelection)
+    for (CSelectionIterator It(mpSelection); It; ++It)
     {
-        if (pNode->NodeType() == eScriptNode)
+        if (It->NodeType() == eScriptNode)
         {
-            CScriptNode *pScript = static_cast<CScriptNode*>(pNode);
+            CScriptNode *pScript = static_cast<CScriptNode*>(*It);
             CScriptObject *pInst = pScript->Object();
             IProperty *pActive = pInst->ActiveProperty();
 
@@ -343,9 +357,9 @@ void CWorldEditor::SetSelectionInstanceNames(const QString& rkNewName, bool IsDo
 {
     // todo: this only supports one node at a time because a macro prevents us from merging undo commands
     // this is fine right now because this function is only ever called with a selection of one node, but probably want to fix in the future
-    if (mSelection.size() == 1 && mSelection.front()->NodeType() == eScriptNode)
+    if (mpSelection->Size() == 1 && mpSelection->Front()->NodeType() == eScriptNode)
     {
-        CScriptNode *pNode = static_cast<CScriptNode*>(mSelection.front());
+        CScriptNode *pNode = static_cast<CScriptNode*>(mpSelection->Front());
         CScriptObject *pInst = pNode->Object();
         IProperty *pName = pInst->InstanceNameProperty();
 
@@ -363,16 +377,23 @@ void CWorldEditor::SetSelectionLayer(CScriptLayer *pLayer)
 {
     QList<CScriptNode*> ScriptNodes;
 
-    foreach (CSceneNode *pNode, mSelection)
+    for (CSelectionIterator It(mpSelection); It; ++It)
     {
-        if (pNode->NodeType() == eScriptNode)
-            ScriptNodes << static_cast<CScriptNode*>(pNode);
+        if (It->NodeType() == eScriptNode)
+            ScriptNodes << static_cast<CScriptNode*>(*It);
     }
 
     if (!ScriptNodes.isEmpty())
         mUndoStack.push(new CChangeLayerCommand(this, ScriptNodes, pLayer));
 }
 
+void CWorldEditor::DeleteSelection()
+{
+    // note: make it only happen if there is a script node selected
+    CDeleteSelectionCommand *pCmd = new CDeleteSelectionCommand(this);
+    mUndoStack.push(pCmd);
+}
+
 void CWorldEditor::UpdateStatusBar()
 {
     // Would be cool to do more frequent status bar updates with more info. Unfortunately, this causes lag.
@@ -384,7 +405,7 @@ void CWorldEditor::UpdateStatusBar()
         {
             CSceneNode *pHoverNode = ui->MainViewport->HoverNode();
 
-            if (pHoverNode && (pHoverNode->NodeType() & mSelectionNodeFlags))
+            if (pHoverNode && mpSelection->IsAllowedType(pHoverNode))
                 StatusText = TO_QSTRING(pHoverNode->Name());
         }
     }
@@ -409,26 +430,26 @@ void CWorldEditor::UpdateGizmoUI()
             case CGizmo::eTranslate:
                 if (mGizmoTransforming && mGizmo.HasTransformed())
                     spinBoxValue = mGizmo.TotalTranslation();
-                else if (!mSelection.empty())
-                    spinBoxValue = mSelection.front()->AbsolutePosition();
+                else if (!mpSelection->IsEmpty())
+                    spinBoxValue = mpSelection->Front()->AbsolutePosition();
                 break;
 
             case CGizmo::eRotate:
                 if (mGizmoTransforming && mGizmo.HasTransformed())
                     spinBoxValue = mGizmo.TotalRotation();
-                else if (!mSelection.empty())
-                    spinBoxValue = mSelection.front()->AbsoluteRotation().ToEuler();
+                else if (!mpSelection->IsEmpty())
+                    spinBoxValue = mpSelection->Front()->AbsoluteRotation().ToEuler();
                 break;
 
             case CGizmo::eScale:
                 if (mGizmoTransforming && mGizmo.HasTransformed())
                     spinBoxValue = mGizmo.TotalScale();
-                else if (!mSelection.empty())
-                    spinBoxValue = mSelection.front()->AbsoluteScale();
+                else if (!mpSelection->IsEmpty())
+                    spinBoxValue = mpSelection->Front()->AbsoluteScale();
                 break;
             }
         }
-        else if (!mSelection.empty()) spinBoxValue = mSelection.front()->AbsolutePosition();
+        else if (!mpSelection->IsEmpty()) spinBoxValue = mpSelection->Front()->AbsolutePosition();
 
         ui->TransformSpinBox->blockSignals(true);
         ui->TransformSpinBox->SetValue(spinBoxValue);
@@ -439,26 +460,23 @@ void CWorldEditor::UpdateGizmoUI()
     if (!mGizmoTransforming)
     {
         // Set gizmo transform
-        if (!mSelection.empty())
+        if (!mpSelection->IsEmpty())
         {
-            mGizmo.SetPosition(mSelection.front()->AbsolutePosition());
-            mGizmo.SetLocalRotation(mSelection.front()->AbsoluteRotation());
+            mGizmo.SetPosition(mpSelection->Front()->AbsolutePosition());
+            mGizmo.SetLocalRotation(mpSelection->Front()->AbsoluteRotation());
         }
     }
 }
 
 void CWorldEditor::UpdateSelectionUI()
 {
-    // Update sidebar
-    ui->ModifyTabContents->GenerateUI(mSelection);
-
     // Update selection info text
     QString SelectionText;
 
-    if (mSelection.size() == 1)
-        SelectionText = TO_QSTRING(mSelection.front()->Name());
-    else if (mSelection.size() > 1)
-        SelectionText = QString("%1 objects selected").arg(mSelection.size());
+    if (mpSelection->Size() == 1)
+        SelectionText = TO_QSTRING(mpSelection->Front()->Name());
+    else if (mpSelection->Size() > 1)
+        SelectionText = QString("%1 objects selected").arg(mpSelection->Size());
 
     QFontMetrics Metrics(ui->SelectionInfoLabel->font());
     SelectionText = Metrics.elidedText(SelectionText, Qt::ElideRight, ui->SelectionInfoFrame->width() - 10);
@@ -478,7 +496,7 @@ void CWorldEditor::UpdateCursor()
 
         if (ui->MainViewport->IsHoveringGizmo())
             ui->MainViewport->SetCursorState(Qt::SizeAllCursor);
-        else if ((pHoverNode) && (pHoverNode->NodeType() & mSelectionNodeFlags))
+        else if ((pHoverNode) && mpSelection->IsAllowedType(pHoverNode))
             ui->MainViewport->SetCursorState(Qt::PointingHandCursor);
         else
             ui->MainViewport->SetCursorState(Qt::ArrowCursor);
@@ -604,10 +622,10 @@ void CWorldEditor::OnUnlinkClicked()
 {
     QList<CScriptNode*> SelectedScriptNodes;
 
-    foreach (CSceneNode *pNode, mSelection)
+    for (CSelectionIterator It(mpSelection); It; ++It)
     {
-        if (pNode->NodeType() == eScriptNode)
-            SelectedScriptNodes << static_cast<CScriptNode*>(pNode);
+        if (It->NodeType() == eScriptNode)
+            SelectedScriptNodes << static_cast<CScriptNode*>(*It);
     }
 
     if (!SelectedScriptNodes.isEmpty())
@@ -727,8 +745,8 @@ void CWorldEditor::UpdateCameraOrbit()
 {
     CCamera *pCamera = &ui->MainViewport->Camera();
 
-    if (!mSelection.isEmpty())
-        pCamera->SetOrbit(mSelectionBounds);
+    if (!mpSelection->IsEmpty())
+        pCamera->SetOrbit(mpSelection->Bounds());
     else if (mpArea)
         pCamera->SetOrbit(mpArea->AABox(), 1.5f);
 }
@@ -745,34 +763,33 @@ void CWorldEditor::OnCameraSpeedChange(double speed)
 
 void CWorldEditor::OnTransformSpinBoxModified(CVector3f value)
 {
-    if (mSelection.empty()) return;
+    if (mpSelection->IsEmpty()) return;
 
     switch (mGizmo.Mode())
     {
         // Use absolute position/rotation, but relative scale. (This way spinbox doesn't show preview multiplier)
         case CGizmo::eTranslate:
         {
-            CVector3f delta = value - mSelection.front()->AbsolutePosition();
-            mUndoStack.push(new CTranslateNodeCommand(this, mSelection, delta, mTranslateSpace));
+            CVector3f delta = value - mpSelection->Front()->AbsolutePosition();
+            mUndoStack.push(new CTranslateNodeCommand(this, mpSelection->SelectedNodeList(), delta, mTranslateSpace));
             break;
         }
 
         case CGizmo::eRotate:
         {
-            CQuaternion delta = CQuaternion::FromEuler(value) * mSelection.front()->AbsoluteRotation().Inverse();
-            mUndoStack.push(new CRotateNodeCommand(this, mSelection, CVector3f::skZero, delta, mRotateSpace));
+            CQuaternion delta = CQuaternion::FromEuler(value) * mpSelection->Front()->AbsoluteRotation().Inverse();
+            mUndoStack.push(new CRotateNodeCommand(this, mpSelection->SelectedNodeList(), CVector3f::skZero, delta, mRotateSpace));
             break;
         }
 
         case CGizmo::eScale:
         {
-            CVector3f delta = value / mSelection.front()->AbsoluteScale();
-            mUndoStack.push(new CScaleNodeCommand(this, mSelection, CVector3f::skZero, delta));
+            CVector3f delta = value / mpSelection->Front()->AbsoluteScale();
+            mUndoStack.push(new CScaleNodeCommand(this, mpSelection->SelectedNodeList(), CVector3f::skZero, delta));
             break;
         }
     }
 
-    RecalculateSelectionBounds();
     UpdateGizmoUI();
 }
 
@@ -782,7 +799,7 @@ void CWorldEditor::OnTransformSpinBoxEdited(CVector3f)
     ui->TransformSpinBox->blockSignals(true);
     ui->MainViewport->setFocus();
     ui->TransformSpinBox->blockSignals(false);
-    if (mSelection.empty()) return;
+    if (mpSelection->IsEmpty()) return;
 
     if (mGizmo.Mode() == CGizmo::eTranslate)   mUndoStack.push(CTranslateNodeCommand::End());
     else if (mGizmo.Mode() == CGizmo::eRotate) mUndoStack.push(CRotateNodeCommand::End());

src/Editor/WorldEditor/CWorldEditor.h

@@ -5,6 +5,7 @@
 #include "CPoiMapEditDialog.h"
 #include "Editor/INodeEditor.h"
 #include "Editor/CGizmo.h"
+#include "Editor/CSceneViewport.h"
 
 #include <Common/CTimer.h>
 #include <Common/EKeyInputs.h>
@@ -47,21 +48,24 @@ public:
     explicit CWorldEditor(QWidget *parent = 0);
     ~CWorldEditor();
     void closeEvent(QCloseEvent *pEvent);
-    bool eventFilter(QObject *pObj, QEvent *pEvent);
-    void SetArea(CWorld *pWorld, CGameArea *pArea, u32 AreaIndex);
+    void SetArea(CWorld *pWorld, CGameArea *pArea);
     bool CheckUnsavedChanges();
 
     inline CGameArea* ActiveArea() const { return mpArea; }
     inline EGame CurrentGame() const { return mpArea ? mpArea->Version() : eUnknownVersion; }
     inline CLinkDialog* LinkDialog() const { return mpLinkDialog; }
+    CSceneViewport* Viewport() const;
 
 public slots:
+    virtual void NotifyNodeAboutToBeDeleted(CSceneNode *pNode);
+
     bool Save();
     void OnLinksModified(const QList<CScriptObject*>& rkInstances);
     void OnPropertyModified(IProperty *pProp);
     void SetSelectionActive(bool Active);
     void SetSelectionInstanceNames(const QString& rkNewName, bool IsDone);
     void SetSelectionLayer(CScriptLayer *pLayer);
+    void DeleteSelection();
 
     void UpdateStatusBar();
     void UpdateGizmoUI();
@@ -116,7 +120,7 @@ signals:
     void InstancesLayerAboutToChange();
     void InstancesLayerChanged(const QList<CScriptNode*>& rkInstanceList);
     void InstanceLinksModified(const QList<CScriptObject*>& rkInstances);
-    void PropertyModified(IProperty *pProp, bool IsEditorProperty);
+    void PropertyModified(CScriptObject *pInst, IProperty *pProp);
 };
 
 #endif // CWORLDEDITOR_H

src/Editor/WorldEditor/CWorldEditor.ui

@@ -229,7 +229,7 @@
         <enum>QTabWidget::Rounded</enum>
        </property>
        <property name="currentIndex">
-        <number>1</number>
+        <number>0</number>
        </property>
        <property name="iconSize">
         <size>
@@ -268,17 +268,14 @@
           <widget class="WEditorProperties" name="CreateTabEditorProperties" native="true"/>
          </item>
          <item>
-          <spacer name="verticalSpacer">
-           <property name="orientation">
-            <enum>Qt::Vertical</enum>
+          <widget class="WCreateTab" name="CreateTabContents" native="true">
+           <property name="sizePolicy">
+            <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
+             <horstretch>0</horstretch>
+             <verstretch>1</verstretch>
+            </sizepolicy>
            </property>
-           <property name="sizeHint" stdset="0">
-            <size>
-             <width>20</width>
-             <height>40</height>
-            </size>
-           </property>
-          </spacer>
+          </widget>
          </item>
         </layout>
        </widget>
@@ -755,6 +752,14 @@
     <string>Edit POI to World Map</string>
    </property>
   </action>
+  <action name="ActionDelete">
+   <property name="text">
+    <string>Delete</string>
+   </property>
+   <property name="shortcut">
+    <string>Del</string>
+   </property>
+  </action>
  </widget>
  <customwidgets>
   <customwidget>
@@ -792,6 +797,12 @@
    <header>Editor/WorldEditor/WEditorProperties.h</header>
    <container>1</container>
   </customwidget>
+  <customwidget>
+   <class>WCreateTab</class>
+   <extends>QWidget</extends>
+   <header>Editor/WorldEditor/WCreateTab.h</header>
+   <container>1</container>
+  </customwidget>
  </customwidgets>
  <resources>
   <include location="../Icons.qrc"/>

src/Editor/WorldEditor/WCreateTab.cpp

@@ -1,5 +1,8 @@
 #include "WCreateTab.h"
 #include "ui_WCreateTab.h"
+#include "CTemplateMimeData.h"
+#include "CWorldEditor.h"
+#include "Editor/Undo/UndoCommands.h"
 
 WCreateTab::WCreateTab(QWidget *parent) :
     QWidget(parent),
@@ -12,3 +15,47 @@ WCreateTab::~WCreateTab()
 {
     delete ui;
 }
+
+bool WCreateTab::eventFilter(QObject *pObj, QEvent *pEvent)
+{
+    if (pObj == mpEditor->Viewport())
+    {
+        if (pEvent->type() == QEvent::DragEnter)
+        {
+            QDragEnterEvent *pDragEvent = static_cast<QDragEnterEvent*>(pEvent);
+
+            if (qobject_cast<const CTemplateMimeData*>(pDragEvent->mimeData()))
+            {
+                pDragEvent->acceptProposedAction();
+                return true;
+            }
+        }
+
+        else if (pEvent->type() == QEvent::Drop)
+        {
+            QDropEvent *pDropEvent = static_cast<QDropEvent*>(pEvent);
+            const CTemplateMimeData *pMimeData = qobject_cast<const CTemplateMimeData*>(pDropEvent->mimeData());
+
+            if (pMimeData)
+            {
+                CVector3f SpawnPoint = mpEditor->Viewport()->HoverPoint();
+                CCreateInstanceCommand *pCmd = new CCreateInstanceCommand(mpEditor, pMimeData->Template(), mpEditor->ActiveArea()->GetScriptLayer(0), SpawnPoint);
+                mpEditor->UndoStack()->push(pCmd);
+                return true;
+            }
+        }
+    }
+
+    return false;
+}
+
+void WCreateTab::SetEditor(CWorldEditor *pEditor)
+{
+    mpEditor = pEditor;
+    pEditor->Viewport()->installEventFilter(this);
+}
+
+void WCreateTab::SetMaster(CMasterTemplate *pMaster)
+{
+    ui->TemplateView->SetMaster(pMaster);
+}

src/Editor/WorldEditor/WCreateTab.h

@@ -1,6 +1,8 @@
 #ifndef WCREATETAB_H
 #define WCREATETAB_H
 
+#include "CWorldEditor.h"
+#include <Core/Resource/Script/CMasterTemplate.h>
 #include <QWidget>
 
 namespace Ui {
@@ -10,11 +12,14 @@ class WCreateTab;
 class WCreateTab : public QWidget
 {
     Q_OBJECT
+    CWorldEditor *mpEditor;
 
 public:
     explicit WCreateTab(QWidget *parent = 0);
     ~WCreateTab();
-
+    bool eventFilter(QObject *, QEvent *);
+    void SetEditor(CWorldEditor *pEditor);
+    void SetMaster(CMasterTemplate *pMaster);
 private:
     Ui::WCreateTab *ui;
 };

src/Editor/WorldEditor/WCreateTab.ui

@@ -6,14 +6,90 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>216</width>
-    <height>421</height>
+    <width>290</width>
+    <height>470</height>
    </rect>
   </property>
   <property name="windowTitle">
    <string>Form</string>
   </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <property name="leftMargin">
+    <number>9</number>
+   </property>
+   <property name="topMargin">
+    <number>9</number>
+   </property>
+   <property name="rightMargin">
+    <number>9</number>
+   </property>
+   <property name="bottomMargin">
+    <number>9</number>
+   </property>
+   <item>
+    <widget class="QGroupBox" name="groupBox">
+     <property name="title">
+      <string>Create Instance</string>
+     </property>
+     <layout class="QVBoxLayout" name="verticalLayout_2">
+      <item>
+       <layout class="QHBoxLayout" name="horizontalLayout">
+        <item>
+         <widget class="QLabel" name="label">
+          <property name="text">
+           <string>Spawn Layer:</string>
+          </property>
          </widget>
+        </item>
+        <item>
+         <widget class="QComboBox" name="comboBox">
+          <property name="sizePolicy">
+           <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
+            <horstretch>1</horstretch>
+            <verstretch>0</verstretch>
+           </sizepolicy>
+          </property>
+         </widget>
+        </item>
+       </layout>
+      </item>
+      <item>
+       <widget class="CTemplateListView" name="TemplateView">
+        <property name="editTriggers">
+         <set>QAbstractItemView::NoEditTriggers</set>
+        </property>
+        <property name="dragEnabled">
+         <bool>true</bool>
+        </property>
+        <property name="dragDropMode">
+         <enum>QAbstractItemView::InternalMove</enum>
+        </property>
+        <property name="defaultDropAction">
+         <enum>Qt::MoveAction</enum>
+        </property>
+        <property name="selectionBehavior">
+         <enum>QAbstractItemView::SelectItems</enum>
+        </property>
+        <property name="verticalScrollMode">
+         <enum>QAbstractItemView::ScrollPerPixel</enum>
+        </property>
+        <property name="horizontalScrollMode">
+         <enum>QAbstractItemView::ScrollPerPixel</enum>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <customwidgets>
+  <customwidget>
+   <class>CTemplateListView</class>
+   <extends>QListView</extends>
+   <header>Editor/WorldEditor/CTemplateListView.h</header>
+  </customwidget>
+ </customwidgets>
  <resources/>
  <connections/>
 </ui>

src/Editor/WorldEditor/WEditorProperties.cpp

@@ -65,7 +65,7 @@ void WEditorProperties::SyncToEditor(CWorldEditor *pEditor)
     connect(mpEditor, SIGNAL(SelectionModified()), this, SLOT(OnSelectionModified()));
     connect(mpEditor, SIGNAL(LayersModified()), this, SLOT(OnLayersModified()));
     connect(mpEditor, SIGNAL(InstancesLayerChanged(QList<CScriptNode*>)), this, SLOT(OnInstancesLayerChanged(QList<CScriptNode*>)));
-    connect(mpEditor, SIGNAL(PropertyModified(IProperty*,bool)), this, SLOT(OnPropertyModified(IProperty*,bool)));
+    connect(mpEditor, SIGNAL(PropertyModified(CScriptObject*,IProperty*)), this, SLOT(OnPropertyModified(CScriptObject*,IProperty*)));
 
     OnLayersModified();
 }
@@ -100,16 +100,16 @@ void WEditorProperties::SetLayerComboBox()
 // ************ PUBLIC SLOTS ************
 void WEditorProperties::OnSelectionModified()
 {
-    const QList<CSceneNode*>& rkSelection = mpEditor->GetSelection();
-    mpDisplayNode = (rkSelection.size() == 1 ? rkSelection.front() : nullptr);
+    CNodeSelection *pSelection = mpEditor->Selection();
+    mpDisplayNode = (pSelection->Size() == 1 ? pSelection->Front() : nullptr);
 
-    if (rkSelection.empty() || rkSelection.size() != 1 || mpDisplayNode->NodeType() != eScriptNode)
+    if (pSelection->IsEmpty() || pSelection->Size() != 1 || mpDisplayNode->NodeType() != eScriptNode)
     {
         mpActiveCheckBox->setChecked(false);
         mpActiveCheckBox->setEnabled(false);
         mpInstanceNameLineEdit->setEnabled(false);
 
-        if (rkSelection.empty())
+        if (pSelection->IsEmpty())
         {
             mpInstanceInfoLabel->setText("<i>[No selection]</i>");
             mpInstanceNameLineEdit->clear();
@@ -121,7 +121,7 @@ void WEditorProperties::OnSelectionModified()
         }
         else
         {
-            mpInstanceInfoLabel->setText(QString("<i>[%1 objects selected]</i>").arg(rkSelection.size()));
+            mpInstanceInfoLabel->setText(QString("<i>[%1 objects selected]</i>").arg(pSelection->Size()));
             mpInstanceNameLineEdit->clear();
         }
     }
@@ -139,11 +139,11 @@ void WEditorProperties::OnSelectionModified()
     SetLayerComboBox();
 }
 
-void WEditorProperties::OnPropertyModified(IProperty* /*pProp*/, bool IsEditorProperty)
+void WEditorProperties::OnPropertyModified(CScriptObject *pInstance, IProperty *pProp)
 {
     if (!mpInstanceNameLineEdit->hasFocus())
     {
-        if (mpDisplayNode->NodeType() == eScriptNode && IsEditorProperty)
+        if (mpDisplayNode->NodeType() == eScriptNode && pInstance->IsEditorProperty(pProp))
             UpdatePropertyValues();
     }
 }

src/Editor/WorldEditor/WEditorProperties.h

@@ -39,7 +39,7 @@ public:
 
 public slots:
     void OnSelectionModified();
-    void OnPropertyModified(IProperty *pProp, bool IsEditorProperty);
+    void OnPropertyModified(CScriptObject *pInst, IProperty *pProp);
     void OnInstancesLayerChanged(const QList<CScriptNode*>& rkNodeList);
     void OnLayersModified();
     void UpdatePropertyValues();

src/Editor/WorldEditor/WModifyTab.cpp

@@ -64,18 +64,28 @@ void WModifyTab::SetEditor(CWorldEditor *pEditor)
     ui->PropertyView->SetEditor(mpWorldEditor);
     connect(mpWorldEditor, SIGNAL(SelectionTransformed()), this, SLOT(OnWorldSelectionTransformed()));
     connect(mpWorldEditor, SIGNAL(InstanceLinksModified(const QList<CScriptObject*>&)), this, SLOT(OnInstanceLinksModified(const QList<CScriptObject*>&)));
+    connect(mpWorldEditor->Selection(), SIGNAL(Modified()), this, SLOT(GenerateUI()));
 }
 
-void WModifyTab::GenerateUI(QList<CSceneNode*>& Selection)
+void WModifyTab::ClearUI()
+{
+    ui->ObjectsTabWidget->hide();
+    ui->PropertyView->SetInstance(nullptr);
+    ui->LightGroupBox->hide();
+    mpSelectedNode = nullptr;
+}
+
+// ************ PUBLIC SLOTS ************
+void WModifyTab::GenerateUI()
 {
     if (mIsPicking)
         mpWorldEditor->ExitPickMode();
 
-    if (Selection.size() == 1)
+    if (mpWorldEditor->Selection()->Size() == 1)
     {
-        if (mpSelectedNode != Selection.front())
+        if (mpSelectedNode != mpWorldEditor->Selection()->Front())
         {
-            mpSelectedNode = Selection.front();
+            mpSelectedNode = mpWorldEditor->Selection()->Front();
 
             // todo: set up editing UI for Light Nodes
             if (mpSelectedNode->NodeType() == eScriptNode)
@@ -100,15 +110,6 @@ void WModifyTab::GenerateUI(QList<CSceneNode*>& Selection)
         ClearUI();
 }
 
-void WModifyTab::ClearUI()
-{
-    ui->ObjectsTabWidget->hide();
-    ui->PropertyView->SetInstance(nullptr);
-    ui->LightGroupBox->hide();
-    mpSelectedNode = nullptr;
-}
-
-// ************ PUBLIC SLOTS ************
 void WModifyTab::OnInstanceLinksModified(const QList<CScriptObject*>& rkInstances)
 {
     if (mpSelectedNode && mpSelectedNode->NodeType() == eScriptNode)

src/Editor/WorldEditor/WModifyTab.h

@@ -3,6 +3,7 @@
 
 #include "CLinkDialog.h"
 #include "CLinkModel.h"
+#include "Editor/CNodeSelection.h"
 #include <Core/Scene/CSceneNode.h>
 #include <Core/Scene/CScriptNode.h>
 
@@ -36,10 +37,10 @@ public:
     explicit WModifyTab(QWidget *pParent = 0);
     ~WModifyTab();
     void SetEditor(CWorldEditor *pEditor);
-    void GenerateUI(QList<CSceneNode*>& Selection);
     void ClearUI();
 
 public slots:
+    void GenerateUI();
     void OnInstanceLinksModified(const QList<CScriptObject*>& rkInstances);
     void OnWorldSelectionTransformed();
 

src/Math/CQuaternion.cpp

@@ -20,22 +20,22 @@ CQuaternion::CQuaternion(float _w, float _x, float _y, float _z)
     z = _z;
 }
 
-CVector3f CQuaternion::XAxis()
+CVector3f CQuaternion::XAxis() const
 {
     return (*this * CVector3f::skUnitX);
 }
 
-CVector3f CQuaternion::YAxis()
+CVector3f CQuaternion::YAxis() const
 {
     return (*this * CVector3f::skUnitY);
 }
 
-CVector3f CQuaternion::ZAxis()
+CVector3f CQuaternion::ZAxis() const
 {
     return (*this * CVector3f::skUnitZ);
 }
 
-CQuaternion CQuaternion::Inverse()
+CQuaternion CQuaternion::Inverse() const
 {
     float fNorm = (w * w) + (x * x) + (y * y) + (z * z);
 
@@ -48,7 +48,7 @@ CQuaternion CQuaternion::Inverse()
         return CQuaternion::skZero;
 }
 
-CVector3f CQuaternion::ToEuler()
+CVector3f CQuaternion::ToEuler() const
 {
     // There is more than one way to do this conversion, based on rotation order.
     // But since we only care about the rotation order used in Retro games, which is consistent,

src/Math/CQuaternion.h

@@ -11,11 +11,11 @@ public:
     CQuaternion();
     CQuaternion(float _w, float _x, float _y, float _z);
 
-    CVector3f XAxis();
-    CVector3f YAxis();
-    CVector3f ZAxis();
-    CQuaternion Inverse();
-    CVector3f ToEuler();
+    CVector3f XAxis() const;
+    CVector3f YAxis() const;
+    CVector3f ZAxis() const;
+    CQuaternion Inverse() const;
+    CVector3f ToEuler() const;
 
     // Operators
     CVector3f operator*(const CVector3f& vec) const;