From b53b143868ccc5b88d87922f95a2ac210ee3744b Mon Sep 17 00:00:00 2001
From: Jack Andersen <jackoalan@gmail.com>
Date: Wed, 10 Feb 2016 20:58:33 -1000
Subject: [PATCH] Additional particle implementation

---
 Runtime/Particle/CElementGen.cpp              | 44 ++++++++++++++++
 Runtime/Particle/CElementGen.hpp              |  1 +
 Runtime/Particle/CSpawnSystemKeyframeData.cpp | 50 +++++++++++++++++++
 Runtime/Particle/CSpawnSystemKeyframeData.hpp | 22 ++++++++
 4 files changed, 117 insertions(+)

diff --git a/Runtime/Particle/CElementGen.cpp b/Runtime/Particle/CElementGen.cpp
index fe3edaed1..c4157d81a 100644
--- a/Runtime/Particle/CElementGen.cpp
+++ b/Runtime/Particle/CElementGen.cpp
@@ -600,8 +600,52 @@ void CElementGen::UpdatePSTranslationAndOrientation()
         sspo->GetValue(x50_curFrame, x294_SEPO);
 }
 
+CElementGen* CElementGen::ConstructChildParticleSystem(const TToken<CGenDescription>& desc)
+{
+
+}
+
 void CElementGen::UpdateChildParticleSystems(double dt)
 {
+    CGlobalRandom gr(x230_randState);
+    SChildGeneratorDesc& icts = x1c_genDesc.GetObj()->x8c_ICTS;
+    if (icts.m_found && x64 != x50_curFrame && x244_CSSD == x50_curFrame)
+    {
+        int ncsyVal = 1;
+        CIntElement* ncsy = x1c_genDesc.GetObj()->x9c_NCSY.get();
+        if (ncsy)
+            ncsy->GetValue(x50_curFrame, ncsyVal);
+
+        CGenDescription* ictsDesc = icts.m_gen.GetObj();
+        if (!(x226 && ictsDesc->x45_31_OPTS))
+        {
+            x234_children.reserve(ncsyVal + x234_children.size());
+            for (int i=0 ; i<ncsyVal ; ++i)
+            {
+                CElementGen* chGen = ConstructChildParticleSystem(icts.m_gen);
+                x234_children.emplace_back(chGen);
+            }
+        }
+    }
+
+    SChildGeneratorDesc& iits = x1c_genDesc.GetObj()->xb8_IITS;
+    if (iits.m_found && x64 != x50_curFrame && x50_curFrame < x214_PSLT &&
+        x68_particleEmission == 1 && x50_curFrame >= x258_SISY &&
+        ((x50_curFrame - x258_SISY) % x25c_PISY) == 0)
+    {
+        CGenDescription* iitsDesc = iits.m_gen.GetObj();
+        if (!(x226 && iitsDesc->x45_31_OPTS))
+        {
+            CElementGen* chGen = ConstructChildParticleSystem(iits.m_gen);
+            x234_children.emplace_back(chGen);
+        }
+    }
+
+    CSpawnSystemKeyframeData* kssm = x1c_genDesc.GetObj()->xd0_KSSM.get();
+    if (kssm && x64 != x50_curFrame && x50_curFrame < x214_PSLT)
+    {
+    }
+
 }
 
 void CElementGen::UpdateLightParameters()
diff --git a/Runtime/Particle/CElementGen.hpp b/Runtime/Particle/CElementGen.hpp
index 31edf480c..6d9fdcc03 100644
--- a/Runtime/Particle/CElementGen.hpp
+++ b/Runtime/Particle/CElementGen.hpp
@@ -184,6 +184,7 @@ public:
     void CreateNewParticles(int);
     void UpdatePSTranslationAndOrientation();
     void UpdateChildParticleSystems(double);
+    CElementGen* ConstructChildParticleSystem(const TToken<CGenDescription>&);
     void UpdateLightParameters();
     void BuildParticleSystemBounds();
 
diff --git a/Runtime/Particle/CSpawnSystemKeyframeData.cpp b/Runtime/Particle/CSpawnSystemKeyframeData.cpp
index e69de29bb..c0f03d10a 100644
--- a/Runtime/Particle/CSpawnSystemKeyframeData.cpp
+++ b/Runtime/Particle/CSpawnSystemKeyframeData.cpp
@@ -0,0 +1,50 @@
+#include "CSpawnSystemKeyframeData.hpp"
+#include "CSimplePool.hpp"
+
+namespace Retro
+{
+
+CSpawnSystemKeyframeData::CSpawnSystemKeyframeData(CInputStream& in)
+{
+    x0 = in.readUint32Big();
+    x4 = in.readUint32Big();
+    x8 = in.readUint32Big();
+    xc = in.readUint32Big();
+
+    u32 count = in.readUint32Big();
+    x10_spawns.reserve(count);
+    for (u32 i=0 ; i<count ; ++i)
+    {
+        u32 v1 = in.readUint32Big();
+        x10_spawns.emplace_back(v1, std::vector<CSpawnSystemKeyframeInfo>());
+        std::vector<CSpawnSystemKeyframeInfo>& v2 = x10_spawns.back().second;
+        u32 v2c = in.readUint32Big();
+        v2.reserve(v2c);
+        for (u32 j=0 ; j<v2c ; ++j)
+            v2.emplace_back(in);
+    }
+}
+
+CSpawnSystemKeyframeData::CSpawnSystemKeyframeInfo::CSpawnSystemKeyframeInfo(CInputStream& in)
+{
+    x0_id = in.readUint32Big();
+    x4 = in.readUint32Big();
+    x8 = in.readUint32Big();
+    xc = in.readUint32Big();
+}
+
+void CSpawnSystemKeyframeData::LoadAllSpawnedSystemTokens(CSimplePool* pool)
+{
+    for (auto& spawn : x10_spawns)
+        for (CSpawnSystemKeyframeInfo& elem : spawn.second)
+            elem.LoadToken(pool);
+}
+
+void CSpawnSystemKeyframeData::CSpawnSystemKeyframeInfo::LoadToken(CSimplePool* pool)
+{
+    x10_token = std::move(pool->GetObj({FOURCC('PART'), x0_id}));
+    x10_token.Lock();
+    x18_found = true;
+}
+
+}
diff --git a/Runtime/Particle/CSpawnSystemKeyframeData.hpp b/Runtime/Particle/CSpawnSystemKeyframeData.hpp
index 7251a8fde..1b5d1e606 100644
--- a/Runtime/Particle/CSpawnSystemKeyframeData.hpp
+++ b/Runtime/Particle/CSpawnSystemKeyframeData.hpp
@@ -2,13 +2,35 @@
 #define __RETRO_CSPAWNSYSTEMKEYFRAMEDATA_HPP__
 
 #include "IOStreams.hpp"
+#include "CToken.hpp"
 
 namespace Retro
 {
 class CSimplePool;
+class CGenDescription;
 
 class CSpawnSystemKeyframeData
 {
+public:
+    class CSpawnSystemKeyframeInfo
+    {
+        friend class CSpawnSystemKeyframeData;
+        u32 x0_id;
+        u32 x4;
+        u32 x8;
+        u32 xc;
+        TToken<CGenDescription> x10_token;
+        bool x18_found = false;
+        void LoadToken(CSimplePool* pool);
+    public:
+        CSpawnSystemKeyframeInfo(CInputStream& in);
+    };
+private:
+    u32 x0;
+    u32 x4;
+    u32 x8;
+    u32 xc;
+    std::vector<std::pair<u32, std::vector<CSpawnSystemKeyframeInfo>>> x10_spawns;
 public:
     CSpawnSystemKeyframeData(CInputStream& in);
     void LoadAllSpawnedSystemTokens(CSimplePool* pool);