#include "boo/System.hpp"
#include "GameGlobalObjects.hpp"
#include "CBooRenderer.hpp"
#include "CModel.hpp"
#include "Particle/CParticleGen.hpp"
#include "Particle/CGenDescription.hpp"
#include "Particle/CDecal.hpp"
#include "Particle/CElementGen.hpp"
#include "CMetroidModelInstance.hpp"
#include "Collision/CAreaOctTree.hpp"
#include "zeus/CUnitVector.hpp"
#include "Graphics/CSkinnedModel.hpp"
#include "zeus/CVector3d.hpp"

#define FOGVOL_RAMP_RES 256
#define FOGVOL_FAR 750.0
#define FOGVOL_NEAR 0.2
#define SPHERE_RAMP_RES 32

namespace urde
{

static rstl::reserved_vector<CDrawable, 50> sDataHolder;
static rstl::reserved_vector<rstl::reserved_vector<CDrawable*, 128>, 50> sBucketsHolder;
static rstl::reserved_vector<CDrawablePlaneObject, 8> sPlaneObjectDataHolder;
static rstl::reserved_vector<u16, 8> sPlaneObjectBucketHolder;

rstl::reserved_vector<u16, 50> Buckets::sBucketIndex;
rstl::reserved_vector<CDrawable, 50>* Buckets::sData = nullptr;
rstl::reserved_vector<rstl::reserved_vector<CDrawable*, 128>, 50>* Buckets::sBuckets = nullptr;
rstl::reserved_vector<CDrawablePlaneObject, 8>* Buckets::sPlaneObjectData = nullptr;
rstl::reserved_vector<u16, 8>* Buckets::sPlaneObjectBucket = nullptr;
const float Buckets::skWorstMinMaxDistance[2] = {99999.f, -99999.f};
float Buckets::sMinMaxDistance[2];

void Buckets::Clear()
{
    sData->clear();
    sBucketIndex.clear();
    sPlaneObjectData->clear();
    sPlaneObjectBucket->clear();
    for (rstl::reserved_vector<CDrawable*, 128>& bucket : *sBuckets)
        bucket.clear();
    sMinMaxDistance[0] = skWorstMinMaxDistance[0];
    sMinMaxDistance[1] = skWorstMinMaxDistance[1];
}

void Buckets::Sort()
{
    float delta = std::max(1.f, sMinMaxDistance[1] - sMinMaxDistance[0]);
    sPlaneObjectBucket->resize(8);

    std::sort(sPlaneObjectBucket->begin(), sPlaneObjectBucket->end(),
    [](u16 a, u16 b) -> bool
    {
        return (*sPlaneObjectData)[a].GetDistance() >= (*sPlaneObjectData)[b].GetDistance();
    });

    u32 precision = 50 / (8 + 1);
    float pitch = 1.f / (delta / float(precision - 2));

    int accum = 0;
    for (u16 idx : *sPlaneObjectBucket)
    {
        ++accum;
        CDrawablePlaneObject& planeObj = (*sPlaneObjectData)[idx];
        planeObj.x24_targetBucket = precision * accum;
    }

    for (CDrawable& drawable : *sData)
    {
        int slot;
        if (sPlaneObjectBucket->empty())
        {
            slot = zeus::clamp(1, int((drawable.GetDistance() - sMinMaxDistance[0]) * pitch), 49);
        }
        else
        {
            /* TODO: Planar sort distribution */
        }

        if (slot == -1)
            slot = 49;
        (*sBuckets)[slot].push_back(&drawable);
    }

    int bucketIdx = sBuckets->size();
    for (auto it = sBuckets->rbegin() ; it != sBuckets->rend() ; ++it)
    {
        --bucketIdx;
        rstl::reserved_vector<CDrawable*, 128>& bucket = *it;
        if (bucket.size())
        {
            sBucketIndex.push_back(bucketIdx);
            std::sort(bucket.begin(), bucket.end(),
            [](CDrawable* a, CDrawable* b) -> bool
            {
                return a->GetDistance() >= b->GetDistance();
            });
        }
    }

    for (auto it = sPlaneObjectBucket->rbegin() ; it != sPlaneObjectBucket->rend() ; ++it)
    {
        CDrawablePlaneObject& planeObj = (*sPlaneObjectData)[*it];
        rstl::reserved_vector<CDrawable*, 128>& bucket = (*sBuckets)[planeObj.x24_targetBucket];
        bucket.push_back(&planeObj);
    }
}

void Buckets::InsertPlaneObject(float dist, float something, const zeus::CAABox& aabb, bool b1,
                                const zeus::CPlane& plane, bool b2, EDrawableType dtype, const void* data)
{
    sPlaneObjectData->push_back(CDrawablePlaneObject(dtype, dist, something, aabb, b1, plane, b2, data));
}

void Buckets::Insert(const zeus::CVector3f& pos, const zeus::CAABox& aabb, EDrawableType dtype,
                     const void* data, const zeus::CPlane& plane, u16 extraSort)
{
    float dist = plane.pointToPlaneDist(pos);
    sData->push_back(CDrawable(dtype, extraSort, dist, aabb, data));
    if (sMinMaxDistance[0] > dist)
        sMinMaxDistance[0] = dist;
    if (sMinMaxDistance[1] < dist)
        sMinMaxDistance[1] = dist;
}

void Buckets::Shutdown()
{
    sData = nullptr;
    sBuckets = nullptr;
    sPlaneObjectData = nullptr;
    sPlaneObjectBucket = nullptr;
}

void Buckets::Init()
{
    sData = &sDataHolder;
    sBuckets = &sBucketsHolder;
    sBuckets->resize(50);
    sPlaneObjectData = &sPlaneObjectDataHolder;
    sPlaneObjectBucket = &sPlaneObjectBucketHolder;
    sMinMaxDistance[0] = skWorstMinMaxDistance[0];
    sMinMaxDistance[1] = skWorstMinMaxDistance[1];
}

CBooRenderer::CAreaListItem::CAreaListItem
(const std::vector<CMetroidModelInstance>* geom,
 const CAreaRenderOctTree* octTree,
 std::vector<TCachedToken<CTexture>>&& textures,
 std::vector<CBooModel*>&& models, int areaIdx)
 : x0_geometry(geom), x4_octTree(octTree), x8_textures(std::move(textures)),
   x10_models(std::move(models)), x18_areaIdx(areaIdx) {}

CBooRenderer::CAreaListItem::~CAreaListItem() {}

static inline bool TestBit(const u32* words, int bit)
{
    return (words[bit / 32] & (1 << (bit & 0x1f))) != 0;
}

void CBooRenderer::ActivateLightsForModel(CAreaListItem* item, CBooModel& model)
{
    std::vector<CLight> thisLights;
    thisLights.reserve(4);

    if (x300_dynamicLights.size())
    {
        u32 lightOctreeWordCount = 0;
        u32* lightOctreeWords = nullptr;
        if (item && model.x44_areaInstanceIdx != -1)
        {
            lightOctreeWordCount = item->x4_octTree->x14_bitmapWordCount;
            lightOctreeWords = item->x1c_lightOctreeWords.data();
        }

        float lightRads[4] = {-1.f, -1.f, -1.f, -1.f};
        CLight* lightRefs[4] = {};
        auto it = x300_dynamicLights.begin();
        for (int i=0 ; i<4 && it != x300_dynamicLights.end() ; ++it, lightOctreeWords += lightOctreeWordCount)
        {
            CLight& refLight = *it;
            if (lightOctreeWords && !TestBit(lightOctreeWords, model.x44_areaInstanceIdx))
                continue;

            bool foundLight = false;
            for (int j=0 ; j<i ; ++j)
            {
                if (lightRefs[j] == &refLight)
                    continue;
                float radius = model.x20_aabb.intersectionRadius(
                    zeus::CSphere(refLight.GetPosition(), refLight.GetRadius()));
                if (radius < 0.f)
                    break;
                if (lightRads[j] <= radius)
                    break;
                lightRads[j] = radius;
                lightRefs[j] = &refLight;
                thisLights.push_back(refLight);
                foundLight = true;
            }

            if (foundLight)
                continue;

            float radius = model.x20_aabb.intersectionRadius(
                zeus::CSphere(refLight.GetPosition(), refLight.GetRadius()));
            if (radius < 0.f)
                continue;
            lightRads[i] = radius;
            lightRefs[i] = &refLight;
            thisLights.push_back(refLight);
            ++i;
        }
    }

    model.ActivateLights(thisLights);
}

void CBooRenderer::RenderBucketItems(CAreaListItem* item)
{
    CModelFlags flags;
    flags.m_extendedShader = EExtendedShader::Lighting;

    for (u16 idx : Buckets::sBucketIndex)
    {
        rstl::reserved_vector<CDrawable*, 128>& bucket = (*Buckets::sBuckets)[idx];
        for (CDrawable* drawable : bucket)
        {
            switch (drawable->GetType())
            {
            case EDrawableType::Particle:
            {
                static_cast<CParticleGen*>((void*)drawable->GetData())->Render();
                break;
            }
            case EDrawableType::WorldSurface:
            {
                SetupRendererStates();
                CBooSurface* surf = static_cast<CBooSurface*>((void*)drawable->GetData());
                CBooModel* model = surf->m_parent;
                if (model)
                {
                    ActivateLightsForModel(item, *model);
                    model->DrawSurface(*surf, flags);
                }
                break;
            }
            default:
            {
                if (xa8_drawableCallback)
                {
                    xa8_drawableCallback(drawable->GetData(), xac_callbackContext,
                                         int(drawable->GetType()) - 2);
                }
                break;
            }
            }
        }
    }
}

void CBooRenderer::HandleUnsortedModel(CAreaListItem* item, CBooModel& model)
{
    ActivateLightsForModel(item, model);
    CBooSurface* surf = model.x38_firstUnsortedSurface;
    CModelFlags flags;
    flags.m_extendedShader = EExtendedShader::Lighting;
    while (surf)
    {
        model.DrawSurface(*surf, flags);
        surf = surf->m_next;
    }
}

static const struct FogVolumeControl
{

    u32 xfc_[12][2] =
    {
        {0, 1},
        {1, 3},
        {3, 2},
        {2, 0},
        {4, 5},
        {5, 7},
        {7, 6},
        {6, 4},
        {0, 4},
        {1, 5},
        {3, 7},
        {2, 6}
    };
    u32 x15c_[8] = {};
    //GXVtxDescList x17c_; {{POS, DIRECT}, {TEX0, DIRECT}}

} s_FogVolumeCtrl = {};

static const int OrthogonalAxis[3][2] =
{
    {1, 2},
    {0, 2},
    {0, 1}
};

static float GetPlaneInterpolant(const zeus::CPlane& plane,
                                 const zeus::CVector3f& vert1,
                                 const zeus::CVector3f& vert2)
{
    return zeus::clamp(0.f, -plane.pointToPlaneDist(vert1) / (vert2 - vert1).dot(plane.normal()), 1.f);
}

void CBooRenderer::CalcDrawFogFan(const zeus::CPlane* planes, int numPlanes, const zeus::CVector3f* verts,
                                  int numVerts, int iteration, int level, CFogVolumePlaneShader& fogVol)
{
    if (level == iteration)
    {
        CalcDrawFogFan(planes, numPlanes, verts, numVerts, iteration, level + 1, fogVol);
        return;
    }

    if (level == numPlanes)
    {
        fogVol.addFan(verts, numVerts);
        return;
    }

    const zeus::CPlane& plane = planes[level];
    u32 insidePlaneCount = 0;
    bool outsidePlane[4];
    for (int i=0 ; i<numVerts ; ++i)
        outsidePlane[insidePlaneCount++] = plane.normal().dot(verts[i]) < plane.d;

    u32 numUseVerts = 0;
    zeus::CVector3f useVerts[4];
    for (int i=0 ; i<numVerts ; ++i)
    {
        int nextIdx = (i + 1) % numVerts;
        int insidePair = int(outsidePlane[i]) | (int(outsidePlane[nextIdx]) << 1);
        if (!(insidePair & 0x1))
            useVerts[numUseVerts++] = verts[i];
        if (insidePair == 1 || insidePair == 2)
        {
            /* Inside/outside transition; clip verts to other plane boundary */
            const zeus::CVector3f vert1 = verts[i];
            const zeus::CVector3f vert2 = verts[nextIdx];
            float interp = GetPlaneInterpolant(plane, vert1, vert2);
            if (interp > 0.f || interp < 1.f)
                useVerts[numUseVerts++] = (vert1 * (1.f - interp)) + (vert2 * interp);
        }
    }

    if (numUseVerts >= 3)
        CalcDrawFogFan(planes, numPlanes, useVerts, numUseVerts, iteration, level + 1, fogVol);
}

void CBooRenderer::DrawFogSlices(const zeus::CPlane* planes, int numPlanes,
                                 int iteration, const zeus::CVector3f& center, float longestAxis,
                                 CFogVolumePlaneShader& fogVol)
{
    u32 vertCount = 0;
    zeus::CVector3d verts[4];
    u32 vert2Count = 0;
    zeus::CVector3f verts2[4];
    const zeus::CPlane& plane = planes[iteration];
    int longestNormAxis = std::fabs(plane[1]) > std::fabs(plane[0]);
    if (std::fabs(plane[2]) > std::fabs(plane[longestNormAxis]))
        longestNormAxis = 2;

    zeus::CVector3d pointOnPlane = center - (plane.pointToPlaneDist(center) * plane.normal());

    float deltaSign = plane[longestNormAxis] >= 0.f ? -1.f : 1.f;
    if (longestNormAxis == 1)
        deltaSign = -deltaSign;

    zeus::CVector3d vec1;
    zeus::CVector3d vec2;

    vec1[OrthogonalAxis[longestNormAxis][0]] = longestAxis;
    vec2[OrthogonalAxis[longestNormAxis][1]] = deltaSign * longestAxis;

    verts[vertCount++] = pointOnPlane - vec1 - vec2;
    verts[vertCount++] = pointOnPlane + vec1 - vec2;
    verts[vertCount++] = pointOnPlane + vec1 + vec2;
    verts[vertCount++] = pointOnPlane - vec1 + vec2;

    zeus::CVector3d planeNormal = plane.normal();
    for (const zeus::CVector3d& vert : verts)
        verts2[vert2Count++] = vert - (planeNormal * (planeNormal.dot(vert) - plane.d));

    CalcDrawFogFan(planes, numPlanes, verts2, vert2Count, iteration, 0, fogVol);
}

void CBooRenderer::RenderFogVolumeModel(const zeus::CAABox& aabb, const CModel* model,
                                        const zeus::CTransform& modelMtx, const zeus::CTransform& viewMtx,
                                        const CSkinnedModel* sModel, int pass, CFogVolumePlaneShader* fvs)
{
    if (!model && !sModel)
    {
        if (pass == 0)
        {
            zeus::CAABox xfAABB = aabb.getTransformedAABox(modelMtx);
            zeus::CUnitVector3f viewNormal(viewMtx.basis[1]);
            zeus::CPlane planes[7] =
            {
                {zeus::CVector3f::skRight, xfAABB.min.x},
                {zeus::CVector3f::skLeft, -xfAABB.max.x},
                {zeus::CVector3f::skForward, xfAABB.min.y},
                {zeus::CVector3f::skBack, -xfAABB.max.y},
                {zeus::CVector3f::skUp, xfAABB.min.z},
                {zeus::CVector3f::skDown, -xfAABB.max.z},
                {viewNormal, viewNormal.dot(viewMtx.origin) + 0.2f + 0.1f}
            };

            CGraphics::SetModelMatrix(zeus::CTransform::Identity());

            float longestAxis = std::max(std::max(
                xfAABB.max.x - xfAABB.min.x,
                xfAABB.max.y - xfAABB.min.y),
                xfAABB.max.z - xfAABB.min.z) * 2.f;

            fvs->reset(7 * 6);
            for (int i=0 ; i<7 ; ++i)
                DrawFogSlices(planes, 7, i, xfAABB.center(), longestAxis, *fvs);
            fvs->draw(0);
        }
        else
        {
            fvs->draw(pass);
        }
    }
    else
    {
        CModelFlags flags;
        switch (pass)
        {
        case 0:
        default:
            flags.m_extendedShader = EExtendedShader::SolidColorFrontfaceCullLEqualAlphaOnly;
            flags.x4_color = zeus::CColor(1.f, 1.f, 1.f, 1.f);
            break;
        case 1:
            flags.m_extendedShader = EExtendedShader::SolidColorFrontfaceCullAlwaysAlphaOnly;
            flags.x4_color = zeus::CColor(1.f, 1.f, 1.f, 1.f);
            break;
        case 2:
            flags.m_extendedShader = EExtendedShader::SolidColorBackfaceCullLEqualAlphaOnly;
            flags.x4_color = zeus::CColor(1.f, 1.f, 1.f, 0.f);
            break;
        case 3:
            flags.m_extendedShader = EExtendedShader::SolidColorBackfaceCullGreaterAlphaOnly;
            flags.x4_color = zeus::CColor(1.f, 1.f, 1.f, 0.f);
            break;
        }

        if (sModel)
        {
            sModel->Draw(flags);
        }
        else
        {
            model->UpdateLastFrame();
            model->Draw(flags);
        }
    }
}

void CBooRenderer::SetupRendererStates() const
{
    CGraphics::SetModelMatrix(zeus::CTransform::Identity());
    CGraphics::g_ColorRegs[1] = x2fc_tevReg1Color;
}

void CBooRenderer::ReallyRenderFogVolume(const zeus::CColor& color, const zeus::CAABox& aabb,
                                         const CModel* model, const CSkinnedModel* sModel)
{
    zeus::CMatrix4f proj = CGraphics::GetPerspectiveProjectionMatrix(false);
    zeus::CVector4f points[8];

    for (int i=0 ; i<8 ; ++i)
    {
        zeus::CVector3f xfPt = CGraphics::g_GXModelView * aabb.getPoint(i);
        points[i] = proj * zeus::CVector4f(xfPt);
    }

    zeus::CVector2i vpMax(0, 0);
    zeus::CVector2i vpMin(g_Viewport.x8_width, g_Viewport.xc_height);

    bool b1 = true;
    for (int i=0 ; i<20 ; ++i)
    {
        zeus::CVector3f overW;
        if (i < 8)
        {
            overW = points[i].toVec3f() * (1.f / points[i].w);
        }
        else
        {
            const zeus::CVector4f& pt1 = points[s_FogVolumeCtrl.xfc_[i-8][0]];
            const zeus::CVector4f& pt2 = points[s_FogVolumeCtrl.xfc_[i-8][1]];

            bool eq1 = (pt1.z / pt1.w) == 1.f;
            bool eq2 = (pt2.z / pt2.w) == 1.f;
            if (eq1 == eq2)
                continue;

            float interp = -(pt1.w - 1.f) / (pt2.w - pt1.w);
            if (interp <= 0.f || interp >= 1.f)
                continue;

            float wRecip = 1.f / (interp * (pt2.w - pt1.w) + pt1.w);
            zeus::CVector3f pt1_3 = pt1.toVec3f();
            zeus::CVector3f pt2_3 = pt2.toVec3f();
            overW = (pt1_3 + interp * (pt2_3 - pt1_3)) * wRecip;
        }

        //if (overW.z > 1.001f)
        //    continue;

        int vpX = zeus::clamp(0, int(g_Viewport.x8_width * overW.x * 0.5f + (g_Viewport.x8_width / 2)), int(g_Viewport.x8_width));
        int vpY = zeus::clamp(0, int(g_Viewport.xc_height * overW.y * 0.5f + (g_Viewport.xc_height / 2)), int(g_Viewport.xc_height));
        vpMax.x = std::max(vpMax.x, vpX);
        vpMin.x = std::min(vpMin.x, vpX);
        vpMax.y = std::max(vpMax.y, vpY);
        vpMin.y = std::min(vpMin.y, vpY);
        b1 = false;
    }

    zeus::CVector2i vpSize = {vpMax.x - vpMin.x, vpMax.y - vpMin.y};
    if (vpSize.x <= 0 || vpSize.y <= 0)
        return;

    SClipScreenRect rect = {};
    rect.x4_left = vpMin.x;
    rect.x8_top = vpMin.y;
    rect.xc_width = vpSize.x;
    rect.x10_height = vpSize.y;
    
    rect.x4_left = 0;
    rect.x8_top = 0;
    rect.xc_width = g_Viewport.x8_width;
    rect.x10_height = g_Viewport.xc_height;
    
    //CGraphics::SetScissor(vpMin.x, vpMin.y, vpSize.x, vpSize.y);

    CFogVolumePlaneShader* fvs;
    if (!model && !sModel)
    {
        fvs = &*((m_nextFogVolumePlaneShader == m_fogVolumePlaneShaders.end()) ?
        m_fogVolumePlaneShaders.insert(m_fogVolumePlaneShaders.end(), CFogVolumePlaneShader()) :
        m_nextFogVolumePlaneShader++);
    }
    else
    {
        fvs = nullptr;
    }

    RenderFogVolumeModel(aabb, model, CGraphics::g_GXModelMatrix, CGraphics::g_ViewMatrix, sModel, 0, fvs);
    RenderFogVolumeModel(aabb, model, CGraphics::g_GXModelMatrix, CGraphics::g_ViewMatrix, sModel, 1, fvs);

    CGraphics::ResolveSpareDepth(rect, 0);

    RenderFogVolumeModel(aabb, model, CGraphics::g_GXModelMatrix, CGraphics::g_ViewMatrix, sModel, 2, fvs);
    RenderFogVolumeModel(aabb, model, CGraphics::g_GXModelMatrix, CGraphics::g_ViewMatrix, sModel, 3, fvs);

    CGraphics::ResolveSpareDepth(rect, 1);

    auto fvf = (m_nextFogVolumeFilter == m_fogVolumeFilters.end()) ?
        m_fogVolumeFilters.insert(m_fogVolumeFilters.end(), CFogVolumeFilter()) :
        m_nextFogVolumeFilter++;
    fvf->draw2WayPass(color);
    fvf->draw1WayPass(color);
    
    //CGraphics::SetScissor(g_Viewport.x0_left, g_Viewport.x4_top, g_Viewport.x8_width, g_Viewport.xc_height);
}

void CBooRenderer::GenerateFogVolumeRampTex(boo::IGraphicsDataFactory::Context& ctx)
{
    u8 data[FOGVOL_RAMP_RES][FOGVOL_RAMP_RES] = {};
    for (int y=0 ; y<FOGVOL_RAMP_RES ; ++y)
    {
        for (int x=0 ; x<FOGVOL_RAMP_RES ; ++x)
        {
            int tmp = y << 16 | x << 8 | 0x7f;
            double a = zeus::clamp(0.0, (-150.0 / (tmp / double(0xffffff) *
                (FOGVOL_FAR - FOGVOL_NEAR) - FOGVOL_FAR) - FOGVOL_NEAR) * 3.0 /
                (FOGVOL_FAR - FOGVOL_NEAR), 1.0);
            data[y][x] = (a * a + a) / 2.f * 255;
        }
    }
    x1b8_fogVolumeRamp = ctx.newStaticTexture(FOGVOL_RAMP_RES, FOGVOL_RAMP_RES, 1,
                                              boo::TextureFormat::I8, data[0],
                                              FOGVOL_RAMP_RES * FOGVOL_RAMP_RES);
}

void CBooRenderer::GenerateSphereRampTex(boo::IGraphicsDataFactory::Context& ctx)
{
    u8 data[SPHERE_RAMP_RES][SPHERE_RAMP_RES] = {};
    float halfRes = SPHERE_RAMP_RES / 2.f;
    for (int y=0 ; y<SPHERE_RAMP_RES ; ++y)
    {
        for (int x=0 ; x<SPHERE_RAMP_RES ; ++x)
        {
            zeus::CVector2f vec((x - halfRes) / halfRes, (y - halfRes) / halfRes);
            data[y][x] = 255 - zeus::clamp(0.f, vec.canBeNormalized() ? vec.magnitude() : 0.f, 1.f) * 255;
        }
    }
    x220_sphereRamp = ctx.newStaticTexture(SPHERE_RAMP_RES, SPHERE_RAMP_RES, 1,
                                           boo::TextureFormat::I8, data[0],
                                           SPHERE_RAMP_RES * SPHERE_RAMP_RES);
}

void CBooRenderer::GenerateScanLinesVBO(boo::IGraphicsDataFactory::Context& ctx)
{
    std::vector<zeus::CVector3f> verts;
    verts.reserve(670);

    for (int i=0 ; i<112 ; ++i)
    {
        if (i != 0)
            verts.push_back(verts.back());
        verts.push_back(zeus::CVector3f(-1.f, 0.f, (i * (4.f / 448.f) + (1.f / 448.f)) * 2.f - 1.f));
        verts.push_back(zeus::CVector3f(-1.f, 0.f, (i * (4.f / 448.f) - (1.f / 448.f)) * 2.f - 1.f));
        verts.push_back(zeus::CVector3f( 1.f, 0.f, (i * (4.f / 448.f) + (1.f / 448.f)) * 2.f - 1.f));
        verts.push_back(zeus::CVector3f( 1.f, 0.f, (i * (4.f / 448.f) - (1.f / 448.f)) * 2.f - 1.f));
        if (i != 111)
            verts.push_back(verts.back());
    }

    m_scanLinesEvenVBO = ctx.newStaticBuffer(boo::BufferUse::Vertex, verts.data(),
                                             sizeof(zeus::CVector3f), verts.size());

    verts.clear();

    for (int i=0 ; i<112 ; ++i)
    {
        if (i != 0)
            verts.push_back(verts.back());
        verts.push_back(zeus::CVector3f(-1.f, 0.f, (i * (4.f / 448.f) + (3.f / 448.f)) * 2.f - 1.f));
        verts.push_back(zeus::CVector3f(-1.f, 0.f, (i * (4.f / 448.f) + (1.f / 448.f)) * 2.f - 1.f));
        verts.push_back(zeus::CVector3f( 1.f, 0.f, (i * (4.f / 448.f) + (3.f / 448.f)) * 2.f - 1.f));
        verts.push_back(zeus::CVector3f( 1.f, 0.f, (i * (4.f / 448.f) + (1.f / 448.f)) * 2.f - 1.f));
        if (i != 111)
            verts.push_back(verts.back());
    }

    m_scanLinesOddVBO = ctx.newStaticBuffer(boo::BufferUse::Vertex, verts.data(),
                                            sizeof(zeus::CVector3f), verts.size());
}

void CBooRenderer::LoadThermoPalette()
{
    m_thermoPaletteTex = xc_store.GetObj("TXTR_ThermoPalette");
    CTexture* thermoTexObj = m_thermoPaletteTex.GetObj();
    if (thermoTexObj)
        x288_thermoPalette = thermoTexObj->GetPaletteTexture();
}

void CBooRenderer::LoadBallFade()
{
    m_ballFadeTex = xc_store.GetObj("TXTR_BallFade");
    CTexture* ballFadeTexObj = m_ballFadeTex.GetObj();
    if (ballFadeTexObj)
        m_ballFade = ballFadeTexObj->GetBooTexture();
}

CBooRenderer::CBooRenderer(IObjectStore& store, IFactory& resFac)
: x8_factory(resFac), xc_store(store), x2a8_thermalRand(20)
{
    g_Renderer = this;
    xee_24_ = true;

    m_staticEntropy = store.GetObj("RandomStaticEntropy");

    m_gfxToken = CGraphics::CommitResources([&](boo::IGraphicsDataFactory::Context& ctx) -> bool
    {
        GenerateFogVolumeRampTex(ctx);
        GenerateSphereRampTex(ctx);
        m_ballShadowId = ctx.newRenderTexture(m_ballShadowIdW, m_ballShadowIdH, true, false);
        GenerateScanLinesVBO(ctx);
        return true;
    });
    LoadThermoPalette();
    LoadBallFade();
    m_thermHotFilter.emplace();

    Buckets::Init();

    m_nextFogVolumePlaneShader = m_fogVolumePlaneShaders.end();
    m_nextFogVolumeFilter = m_fogVolumeFilters.end();
}

void CBooRenderer::AddWorldSurfaces(CBooModel& model)
{
    CBooSurface* surf = model.x3c_firstSortedSurface;
    while (surf)
    {
        const CBooModel::MaterialSet::Material& mat = model.GetMaterialByIndex(surf->m_data.matIdx);
        zeus::CAABox aabb = surf->GetBounds();
        zeus::CVector3f pt = aabb.closestPointAlongVector(xb0_viewPlane.vec);
        Buckets::Insert(pt, aabb, EDrawableType::WorldSurface, surf, xb0_viewPlane,
                        mat.heclIr.m_blendDst != boo::BlendFactor::Zero);
        surf = surf->m_next;
    }
}

std::list<CBooRenderer::CAreaListItem>::iterator
CBooRenderer::FindStaticGeometry(const std::vector<CMetroidModelInstance>* geometry)
{
    return std::find_if(x1c_areaListItems.begin(), x1c_areaListItems.end(),
                        [&](CAreaListItem& item) -> bool {return item.x0_geometry == geometry;});
}

void CBooRenderer::AddStaticGeometry(const std::vector<CMetroidModelInstance>* geometry,
                                     const CAreaRenderOctTree* octTree, int areaIdx)
{
    auto search = FindStaticGeometry(geometry);
    if (search == x1c_areaListItems.end())
    {
        std::vector<TCachedToken<CTexture>> textures;
        std::vector<CBooModel*> models;
        if (geometry->size())
        {
            (*geometry)[0].m_instance->MakeTexturesFromMats(textures, xc_store);
            models.reserve(geometry->size());
            int instIdx = 0;
            for (const CMetroidModelInstance& inst : *geometry)
            {
                models.push_back(inst.m_instance.get());
                models.back()->x44_areaInstanceIdx = instIdx++;
            }
        }
        x1c_areaListItems.emplace_back(geometry, octTree, std::move(textures), std::move(models), areaIdx);
    }
}

void CBooRenderer::EnablePVS(const CPVSVisSet* set, u32 areaIdx)
{
    xc8_pvs.emplace(*set);
    xe0_pvsAreaIdx = areaIdx;
}

void CBooRenderer::DisablePVS()
{
    xc8_pvs = std::experimental::nullopt;
}

void CBooRenderer::RemoveStaticGeometry(const std::vector<CMetroidModelInstance>* geometry)
{
    auto search = FindStaticGeometry(geometry);
    if (search != x1c_areaListItems.end())
        x1c_areaListItems.erase(search);
}

void CBooRenderer::DrawAreaGeometry(int areaIdx, int mask, int targetMask)
{
    x318_30_inAreaDraw = true;
    SetupRendererStates();
    CModelFlags flags;

    for (CAreaListItem& item : x1c_areaListItems)
    {
        if (areaIdx != -1 || item.x18_areaIdx == areaIdx)
        {
            CPVSVisSet* pvs = xc8_pvs ? &*xc8_pvs : nullptr;
            if (xe0_pvsAreaIdx != item.x18_areaIdx)
                pvs = nullptr;
            int modelIdx = 0;
            for (auto it = item.x10_models.begin() ; it != item.x10_models.end() ; ++it, ++modelIdx)
            {
                CBooModel* model = *it;
                if (pvs)
                {
                    bool visible = pvs->GetVisible(modelIdx) != EPVSVisSetState::EndOfTree;
                    if ((xc4_pvsMode == EPVSMode::PVS && !visible) || (xc4_pvsMode == EPVSMode::PVSAndMask && visible))
                        continue;
                }
                if ((model->x41_mask & mask) != targetMask)
                    continue;
                if (!x44_frustumPlanes.aabbFrustumTest(model->x20_aabb))
                    continue;

                for (const CBooSurface* surf = model->x38_firstUnsortedSurface ; surf ; surf = surf->m_next)
                    model->DrawSurface(*surf, flags);
                for (const CBooSurface* surf = model->x3c_firstSortedSurface ; surf ; surf = surf->m_next)
                    model->DrawSurface(*surf, flags);
            }
        }
    }

    x318_30_inAreaDraw = false;
}

void CBooRenderer::DrawUnsortedGeometry(int areaIdx, int mask, int targetMask)
{
    SetupRendererStates();

    CAreaListItem* lastOctreeItem = nullptr;

    for (CAreaListItem& item : x1c_areaListItems)
    {
        if (areaIdx != -1 && item.x18_areaIdx != areaIdx)
            continue;

        if (item.x4_octTree)
            lastOctreeItem = &item;

        CPVSVisSet* pvs = nullptr;
        if (xc8_pvs)
            pvs = &*xc8_pvs;
        if (xe0_pvsAreaIdx != item.x10_models.size())
            pvs = nullptr;

        u32 idx = 0;
        for (auto it = item.x10_models.begin() ; it != item.x10_models.end() ; ++it, ++idx)
        {
            CBooModel* model = *it;
            if (pvs)
            {
                bool vis = pvs->GetVisible(idx) != EPVSVisSetState::EndOfTree;
                switch (xc4_pvsMode)
                {
                case EPVSMode::PVS:
                {
                    if (!vis)
                    {
                        model->x40_25_modelVisible = false;
                        continue;
                    }
                    break;
                }
                case EPVSMode::PVSAndMask:
                {
                    if (!vis && (model->x41_mask & mask) != targetMask)
                    {
                        model->x40_25_modelVisible = false;
                        continue;
                    }
                }
                default: break;
                }
            }

            if ((model->x41_mask & mask) != targetMask)
            {
                model->x40_25_modelVisible = false;
                continue;
            }

            if (!x44_frustumPlanes.aabbFrustumTest(model->x20_aabb))
            {
                model->x40_25_modelVisible = false;
                continue;
            }

            if (x318_25_drawWireframe)
            {
                model->x40_25_modelVisible = false;
                //HandleUnsortedModelWireframe();
                continue;
            }

            model->x40_25_modelVisible = true;
            HandleUnsortedModel(lastOctreeItem, *model);
        }

    }

    //SetupCGraphicsStates();
}

void CBooRenderer::DrawSortedGeometry(int areaIdx, int mask, int targetMask)
{
    SetupRendererStates();

    CAreaListItem* lastOctreeItem = nullptr;

    for (CAreaListItem& item : x1c_areaListItems)
    {
        if (areaIdx != -1 && item.x18_areaIdx != areaIdx)
            continue;

        if (item.x4_octTree)
            lastOctreeItem = &item;

        for (auto it = item.x10_models.begin() ; it != item.x10_models.end() ; ++it)
        {
            CBooModel* model = *it;
            if (model->x40_25_modelVisible)
                AddWorldSurfaces(*model);
        }
    }

    Buckets::Sort();
    RenderBucketItems(lastOctreeItem);

    //SetupCGraphicsStates();
    //DrawRenderBucketsDebug();
    Buckets::Clear();
}

void CBooRenderer::DrawStaticGeometry(int modelCount, int mask, int targetMask)
{
    DrawUnsortedGeometry(modelCount, mask, targetMask);
    DrawSortedGeometry(modelCount, mask, targetMask);
}

void CBooRenderer::DrawModelFlat(const CModel& model, const CModelFlags& flags, bool unsortedOnly)
{
    model.GetInstance().DrawFlat(unsortedOnly ?
                                     CBooModel::ESurfaceSelection::UnsortedOnly :
                                     CBooModel::ESurfaceSelection::All,
                                 flags.m_extendedShader);
}

void CBooRenderer::PostRenderFogs()
{
    for (const auto& warp : x2c4_spaceWarps)
        DrawSpaceWarp(warp.first, warp.second);
    x2c4_spaceWarps.clear();

    x2ac_fogVolumes.sort([](const CFogVolumeListItem& a, const CFogVolumeListItem& b)
    {
        zeus::CAABox aabbA = a.x34_aabb.getTransformedAABox(a.x0_transform);
        bool insideA = aabbA.pointInside(zeus::CVector3f(CGraphics::g_ViewPoint.x, CGraphics::g_ViewPoint.y, aabbA.min.z));

        zeus::CAABox aabbB = b.x34_aabb.getTransformedAABox(b.x0_transform);
        bool insideB = aabbB.pointInside(zeus::CVector3f(CGraphics::g_ViewPoint.x, CGraphics::g_ViewPoint.y, aabbB.min.z));

        if (insideA != insideB)
            return insideA;

        float dotA = aabbA.furthestPointAlongVector(CGraphics::g_ViewMatrix.basis[1]).dot(CGraphics::g_ViewMatrix.basis[1]);
        float dotB = aabbB.furthestPointAlongVector(CGraphics::g_ViewMatrix.basis[1]).dot(CGraphics::g_ViewMatrix.basis[1]);
        return dotA < dotB;
    });
    for (const CFogVolumeListItem& fog : x2ac_fogVolumes)
    {
        CGraphics::SetModelMatrix(fog.x0_transform);
        ReallyRenderFogVolume(fog.x30_color, fog.x34_aabb, fog.x4c_model.GetObj(), fog.x5c_skinnedModel);
    }
    x2ac_fogVolumes.clear();
}

void CBooRenderer::AddParticleGen(const CParticleGen& gen)
{
    auto bounds = gen.GetBounds();
    if (bounds)
    {
        zeus::CVector3f pt = bounds.value().closestPointAlongVector(xb0_viewPlane.vec);
        Buckets::Insert(pt, bounds.value(), EDrawableType::Particle, &gen, xb0_viewPlane, 0);
    }
}

void CBooRenderer::AddPlaneObject(const void*, const zeus::CAABox&, const zeus::CPlane&, int)
{

}

void CBooRenderer::AddDrawable(const void* obj, const zeus::CVector3f& pos, const zeus::CAABox& aabb, int mode, EDrawableSorting sorting)
{
    if (sorting == EDrawableSorting::UnsortedCallback)
        xa8_drawableCallback(obj, xac_callbackContext, mode);
    else
        Buckets::Insert(pos, aabb, EDrawableType(mode + 2), obj, xb0_viewPlane, 0);
}

void CBooRenderer::SetDrawableCallback(TDrawableCallback cb, const void* ctx)
{
    xa8_drawableCallback = cb;
    xac_callbackContext = ctx;
}

void CBooRenderer::SetWorldViewpoint(const zeus::CTransform& xf)
{
    CGraphics::SetViewPointMatrix(xf);
    xb0_viewPlane.vec = xf.basis[1];
    xb0_viewPlane.d = xf.basis[1].dot(xf.origin);
}

void CBooRenderer::SetPerspective(float fovy, float width, float height, float znear, float zfar)
{
    CGraphics::SetPerspective(fovy, width / height, znear, zfar);
}

void CBooRenderer::SetPerspective(float fovy, float aspect, float znear, float zfar)
{
    CGraphics::SetPerspective(fovy, aspect, znear, zfar);
}

std::pair<zeus::CVector2f, zeus::CVector2f>
CBooRenderer::SetViewportOrtho(bool centered, float znear, float zfar)
{
    float left = centered ? g_Viewport.x0_left - g_Viewport.x10_halfWidth : 0.f;
    float bottom = centered ? g_Viewport.x4_top - g_Viewport.x14_halfHeight : 0.f;
    float top = centered ? g_Viewport.x0_left + g_Viewport.x14_halfHeight : g_Viewport.xc_height;
    float right = centered ? g_Viewport.x4_top + g_Viewport.x10_halfWidth : g_Viewport.x8_width;

    CGraphics::SetOrtho(left, right, top, bottom, znear, zfar);
    CGraphics::SetViewPointMatrix(zeus::CTransform::Identity());
    CGraphics::SetModelMatrix(zeus::CTransform::Identity());

    return {{left, bottom}, {right, top}};
}

void CBooRenderer::SetClippingPlanes(const zeus::CFrustum& frustum)
{
    x44_frustumPlanes = frustum;
}

void CBooRenderer::SetViewport(int l, int b, int w, int h)
{
    CGraphics::SetViewport(l, b, w, h);
    CGraphics::SetScissor(l, b, w, h);
}

void CBooRenderer::SetDebugOption(EDebugOption, int)
{
}

void CBooRenderer::BeginScene()
{
    CGraphics::SetViewport(0, 0, g_Viewport.x8_width, g_Viewport.xc_height);
    CGraphics::SetPerspective(75.f, CGraphics::g_ProjAspect, 1.f, 4096.f);
    CGraphics::SetModelMatrix(zeus::CTransform::Identity());
#if 0
    if (x310_phazonSuitMaskCountdown != 0)
    {
        --x310_phazonSuitMaskCountdown;
        if (x310_phazonSuitMaskCountdown == 0)
            x314_phazonSuitMask.reset();
    }
#endif
    x318_27_currentRGBA6 = x318_26_requestRGBA6;
    if (!x318_31_persistRGBA6)
        x318_26_requestRGBA6 = false;
    //GXSetPixelFmt(x318_27_currentRGBA6);
    CGraphics::BeginScene();
    m_nextFogVolumePlaneShader = m_fogVolumePlaneShaders.begin();
    m_nextFogVolumeFilter = m_fogVolumeFilters.begin();
}

void CBooRenderer::EndScene()
{
    CGraphics::EndScene();
    if (x2dc_reflectionAge >= 2)
    {
        // Delete reflection tex x14c_
    }
    else
    {
        ++x2dc_reflectionAge;
    }
}

void CBooRenderer::SetAmbientColor(const zeus::CColor& color)
{
    CGraphics::SetAmbientColor(color);
}

void CBooRenderer::DrawString(const char*, int, int)
{
}

u32 CBooRenderer::GetFPS()
{
    return 0;
}

void CBooRenderer::CacheReflection(TReflectionCallback cb, void* ctx, bool clearAfter)
{
    if (!x318_24_refectionDirty)
        return;
    x318_24_refectionDirty = false;
    x2dc_reflectionAge = 0;

    BindReflectionDrawTarget();
    SViewport backupVp = g_Viewport;
    SetViewport(0, 0, 256, 256);
    CGraphics::g_BooMainCommandQueue->clearTarget();
    cb(ctx, CBooModel::g_ReflectViewPos);
    boo::SWindowRect rect(0, 0, 256, 256);
    CGraphics::g_BooMainCommandQueue->resolveBindTexture(x14c_reflectionTex, rect, false, 0, true, false);
    BindMainDrawTarget();
    SetViewport(backupVp.x0_left, backupVp.x4_top, backupVp.x8_width, backupVp.xc_height);
}

void CBooRenderer::DrawSpaceWarp(const zeus::CVector3f& pt, float strength)
{
    m_spaceWarpFilter.setStrength(strength);
    m_spaceWarpFilter.draw(pt);
}

void CBooRenderer::DrawThermalModel(const CModel& model, const zeus::CColor& mulCol, const zeus::CColor& addCol)
{
    CModelFlags flags;
    flags.m_extendedShader = EExtendedShader::Thermal;
    flags.x4_color = mulCol;
    flags.addColor = addCol;
    model.UpdateLastFrame();
    model.Draw(flags);
}

void CBooRenderer::DrawXRayOutline(const zeus::CAABox& aabb)
{
    CModelFlags flags;
    flags.m_extendedShader = EExtendedShader::ForcedAlpha;

    for (CAreaListItem& item : x1c_areaListItems)
    {
        if (item.x4_octTree)
        {
            std::vector<u32> bitmap;
            item.x4_octTree->FindOverlappingModels(bitmap, aabb);

            for (u32 c=0 ; c<item.x4_octTree->x14_bitmapWordCount ; ++c)
            {
                for (u32 b=0 ; b<32 ; ++b)
                {
                    if (bitmap[c] & (1 << b))
                    {
                        CBooModel* model = item.x10_models[c * 32 + b];
                        model->UpdateUniformData(flags, nullptr, nullptr);
                        const CBooSurface* surf = model->x38_firstUnsortedSurface;
                        while (surf)
                        {
                            if (surf->GetBounds().intersects(aabb))
                                model->DrawSurface(*surf, flags);
                            surf = surf->m_next;
                        }
                    }
                }
            }
        }
    }
}

void CBooRenderer::SetWireframeFlags(int)
{
}

void CBooRenderer::SetWorldFog(ERglFogMode mode, float startz, float endz, const zeus::CColor& color)
{
    if (x318_28_disableFog)
        mode = ERglFogMode::None;
    CGraphics::SetFog(mode, startz, endz, color);
}

void CBooRenderer::RenderFogVolume(const zeus::CColor&, const zeus::CAABox&, const TLockedToken<CModel>*, const CSkinnedModel*)
{
}

void CBooRenderer::SetThermal(bool thermal, float level, const zeus::CColor& color)
{
    x318_29_thermalVisor = thermal;
    x2f0_thermalVisorLevel = level;
    x2f4_thermColor = color;
    CDecal::SetMoveRedToAlphaBuffer(false);
    CElementGen::SetMoveRedToAlphaBuffer(false);
}

void CBooRenderer::SetThermalColdScale(float scale)
{
    x2f8_thermColdScale = zeus::clamp(0.f, scale, 1.f);
}

void CBooRenderer::DoThermalBlendCold()
{
    zeus::CColor a = zeus::CColor::lerp(x2f4_thermColor, zeus::CColor::skWhite, x2f8_thermColdScale);
    m_thermColdFilter.setColorA(a);
    float bFac = 0.f;
    float bAlpha = 1.f;
    if (x2f8_thermColdScale < 0.5f)
    {
        bAlpha = x2f8_thermColdScale * 2.f;
        bFac = (1.f - bAlpha) / 8.f;
    }
    zeus::CColor b{bFac, bFac, bFac, bAlpha};
    m_thermColdFilter.setColorB(b);
    zeus::CColor c = zeus::CColor::lerp(zeus::CColor::skBlack, zeus::CColor::skWhite,
                                        zeus::clamp(0.f, (x2f8_thermColdScale - 0.25f) * 4.f / 3.f, 1.f));
    m_thermColdFilter.setColorC(c);

    m_thermColdFilter.setScale(x2f8_thermColdScale);

    m_thermColdFilter.setShift(x2a8_thermalRand.Next() % 32);
    m_thermColdFilter.draw();
    CElementGen::SetMoveRedToAlphaBuffer(true);
    CDecal::SetMoveRedToAlphaBuffer(true);
}

void CBooRenderer::DoThermalBlendHot()
{
    m_thermHotFilter->draw();
}

u32 CBooRenderer::GetStaticWorldDataSize()
{
    return 0;
}

void CBooRenderer::PrepareDynamicLights(const std::vector<CLight>& lights)
{
    x300_dynamicLights = lights;
    for (CAreaListItem& area : x1c_areaListItems)
    {
        if (const CAreaRenderOctTree* arot = area.x4_octTree)
        {
            area.x1c_lightOctreeWords.clear();
            area.x1c_lightOctreeWords.resize(arot->x14_bitmapWordCount * lights.size());
            u32* wordPtr = area.x1c_lightOctreeWords.data();
            for (const CLight& light : lights)
            {
                float radius = light.GetRadius();
                zeus::CVector3f vMin = light.GetPosition() - radius;
                zeus::CVector3f vMax = light.GetPosition() + radius;
                zeus::CAABox aabb(vMin, vMax);
                arot->FindOverlappingModels(wordPtr, aabb);
                wordPtr += arot->x14_bitmapWordCount;
            }
        }
    }
}

void CBooRenderer::SetWorldLightMultiplyColor(const zeus::CColor& color)
{
    CGraphics::g_ColorRegs[1] = color;
}

void CBooRenderer::SetWorldLightFadeLevel(float level)
{
    x2fc_tevReg1Color = zeus::CColor(level, level, level, 1.f);
}

void CBooRenderer::ReallyDrawPhazonSuitIndirectEffect(const zeus::CColor& vertColor, /*const CTexture& maskTex,*/
                                                      const CTexture& indTex, const zeus::CColor& modColor,
                                                      float scale, float offX, float offY)
{
    m_phazonSuitFilter.draw(modColor, scale, offX * scale, offY * scale);
}

void CBooRenderer::ReallyDrawPhazonSuitEffect(const zeus::CColor& modColor /*, const CTexture& maskTex*/)
{
    m_phazonSuitFilter.draw(modColor, 0.f, 0.f, 0.f);
}

void CBooRenderer::DoPhazonSuitIndirectAlphaBlur(float blurRadius /*, float f2*/, const TLockedToken<CTexture>& indTex)
{
    m_phazonSuitFilter.drawBlurPasses(blurRadius, indTex.IsLoaded() ? indTex.GetObj() : nullptr);
}

void CBooRenderer::DrawPhazonSuitIndirectEffect(const zeus::CColor& nonIndirectMod, const TLockedToken<CTexture>& indTex,
                                                const zeus::CColor& indirectMod, float blurRadius,
                                                float scale, float offX, float offY)
{
    /* Indirect background already in binding 0 */

    /* Resolve alpha channel of just-drawn phazon suit into binding 1 */
    SClipScreenRect rect(g_Viewport);
    CGraphics::ResolveSpareTexture(rect, 1);

    /* Perform blur filter and resolve into binding 2 */
    DoPhazonSuitIndirectAlphaBlur(blurRadius, indTex);

    /* Draw effect; subtracting binding 1 from binding 2 for the filter 'cutout' */
    if (indTex && indTex.IsLoaded())
        ReallyDrawPhazonSuitIndirectEffect(zeus::CColor::skWhite, *indTex, indirectMod, scale, offX, offY);
    else
        ReallyDrawPhazonSuitEffect(nonIndirectMod);
}

void CBooRenderer::AllocatePhazonSuitMaskTexture()
{
    x318_26_requestRGBA6 = true;
    x310_phazonSuitMaskCountdown = 2;
}

void CBooRenderer::FindOverlappingWorldModels(std::vector<u32>& modelBits, const zeus::CAABox& aabb) const
{
    u32 bitmapWords = 0;
    for (const CAreaListItem& item : x1c_areaListItems)
        if (item.x4_octTree)
            bitmapWords += item.x4_octTree->x14_bitmapWordCount;

    if (!bitmapWords)
    {
        modelBits.clear();
        return;
    }

    modelBits.clear();
    modelBits.resize(bitmapWords);

    u32 curWord = 0;
    for (const CAreaListItem& item : x1c_areaListItems)
    {
        if (!item.x4_octTree)
            continue;

        item.x4_octTree->FindOverlappingModels(modelBits.data() + curWord, aabb);

        u32 wordModel = 0;
        for (int i=0 ; i<item.x4_octTree->x14_bitmapWordCount ; ++i, wordModel += 32)
        {
            u32& word = modelBits[i];
            if (!word)
                continue;
            for (int j=0 ; j<32 ; ++j)
            {
                if ((1 << j) & word)
                {
                    const zeus::CAABox& modelAABB = item.x10_models[wordModel + j]->x20_aabb;
                    if (!modelAABB.intersects(aabb))
                        word &= ~(1 << j);
                }
            }
        }

        curWord += item.x4_octTree->x14_bitmapWordCount;
    }
}

int CBooRenderer::DrawOverlappingWorldModelIDs(int alphaVal, const std::vector<u32>& modelBits,
                                               const zeus::CAABox& aabb) const
{
    SetupRendererStates();

    CModelFlags flags;
    flags.m_extendedShader = EExtendedShader::SolidColor; // Do solid color draw

    u32 curWord = 0;
    for (const CAreaListItem& item : x1c_areaListItems)
    {
        if (!item.x4_octTree)
            continue;

        u32 wordModel = 0;
        for (int i=0 ; i<item.x4_octTree->x14_bitmapWordCount ; ++i, wordModel += 32)
        {
            const u32& word = modelBits[i];
            if (!word)
                continue;
            for (int j=0 ; j<32 ; ++j)
            {
                if ((1 << j) & word)
                {
                    if (alphaVal > 255)
                        return alphaVal;

                    flags.x4_color.a = alphaVal / 255.f;
                    const CBooModel& model = *item.x10_models[wordModel + j];
                    const_cast<CBooModel&>(model).VerifyCurrentShader(0);
                    for (const CBooSurface* surf = model.x38_firstUnsortedSurface; surf; surf = surf->m_next)
                        if (surf->GetBounds().intersects(aabb))
                            model.DrawSurface(*surf, flags);
                    alphaVal += 4;
                }
            }
        }

        curWord += item.x4_octTree->x14_bitmapWordCount;
    }

    return alphaVal;
}

void CBooRenderer::DrawOverlappingWorldModelShadows(int alphaVal, const std::vector<u32>& modelBits,
                                                    const zeus::CAABox& aabb, float alpha) const
{
    CModelFlags flags;
    flags.x4_color.a = alpha;
    flags.m_extendedShader = EExtendedShader::MorphBallShadow; // Do shadow draw

    u32 curWord = 0;
    for (const CAreaListItem& item : x1c_areaListItems)
    {
        if (!item.x4_octTree)
            continue;

        u32 wordModel = 0;
        for (int i=0 ; i<item.x4_octTree->x14_bitmapWordCount ; ++i, wordModel += 32)
        {
            const u32& word = modelBits[i];
            if (!word)
                continue;
            for (int j=0 ; j<32 ; ++j)
            {
                if ((1 << j) & word)
                {
                    if (alphaVal > 255)
                        return;

                    flags.x4_color.r = alphaVal / 255.f;
                    const CBooModel& model = *item.x10_models[wordModel + j];
                    const_cast<CBooModel&>(model).VerifyCurrentShader(0);
                    for (const CBooSurface* surf = model.x38_firstUnsortedSurface; surf; surf = surf->m_next)
                        if (surf->GetBounds().intersects(aabb))
                            model.DrawSurface(*surf, flags);
                    alphaVal += 4;
                }
            }
        }

        curWord += item.x4_octTree->x14_bitmapWordCount;
    }
}

}