CWE-ou-minkata/Sources/Tools/MaxConvert/plClusterUtil.cpp

/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011  Cyan Worlds, Inc.

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*==LICENSE==*/

#include "hsWindows.h"
#include <commdlg.h>

#include "Max.h"
#include "stdmat.h"
#include "bmmlib.h"
#include "iparamb2.h"
#include "meshdlib.h" 

#include "hsTypes.h"

#include <vector>
#include <algorithm>

#include "MaxMain/plMaxNode.h"
#include "MaxComponent/plComponent.h"
#include "MaxComponent/plLightGrpComponent.h"
#include "MaxComponent/plSoftVolumeComponent.h"

#include "plClusterUtil.h"

#include "plDrawable/plClusterGroup.h"
#include "plDrawable/plCluster.h"
#include "plDrawable/plSpanTemplate.h"
#include "plDrawable/plSpanInstance.h"
#include "plDrawable/plGeometrySpan.h"

#include "plSurface/hsGMaterial.h"
#include "plSurface/plLayer.h"
#include "plScene/plVisRegion.h"
#include "plGLight/plLightInfo.h"

#include "plMeshConverter.h"
#include "hsVertexShader.h"
#include "plLightMapGen.h"

#include "hsResMgr.h"
#include "pnKeyedObject/plUoid.h"

#include "pnMessage/plNodeRefMsg.h"

#include "plTweak.h"

plConst(int) kDefMinFaces(200);
plConst(int) kDefMaxFaces(1000);
plConst(hsScalar) kDefMinSize(50.f);

plClusterUtil::plClusterUtil()
:   fGroup(nil),
    fTemplNode(nil),
    fTemplate(nil),
    fMinFaces(kDefMinFaces),
    fMaxFaces(kDefMaxFaces),
    fMinSize(kDefMinSize),
    fIdx(0)
{
}

plClusterUtil::~plClusterUtil()
{
}

plClusterGroup* plClusterUtil::CreateGroup(plMaxNode* templNode, const char* name)
{
    plClusterGroup* retVal = TRACKED_NEW plClusterGroup;
    
    char buff[256];
    sprintf(buff, "%s_%s_%d", name, templNode->GetName(), fIdx++);
    hsgResMgr::ResMgr()->NewKey(buff, retVal, templNode->GetLocation(), templNode->GetLoadMask());

    plKey sceneNode = templNode->GetRoomKey();
    retVal->SetSceneNode(sceneNode);

    plNodeRefMsg* refMsg = TRACKED_NEW plNodeRefMsg(sceneNode, plRefMsg::kOnCreate, -1, plNodeRefMsg::kGeneric);
    hsgResMgr::ResMgr()->AddViaNotify(retVal->GetKey(), refMsg, plRefFlags::kActiveRef);

    return retVal;
}

plClusterGroup* plClusterUtil::SetupGroup(plClusterGroup *group, plMaxNode* templNode, plSpanTemplateB* templ)
{
    fTemplNode = templNode;
    fGroup = group;
    fTemplate = templ;

    fGroup->fTemplate = templ;
    fGroup->ISendToSelf(plClusterGroup::kRefMaterial, templ->fMaterial);

    fGroup->fRenderLevel = templ->fRenderLevel;

    fMinInsts = fMinFaces / templ->NumTris();
    fMaxInsts = fMaxFaces / templ->NumTris();
    if( fMinInsts < 1 )
        fMinInsts = 1;
    if( fMaxInsts <= fMinInsts )
        fMaxInsts = fMinInsts+1;

    // STUB
    // Finish setting up the group here (lights, visregions, LOD), extracting all info
    // from the template node.
    ISetupGroupFromTemplate(templNode);

    return fGroup;
}

void plClusterUtil::ISetupGroupFromTemplate(plMaxNode* templ)
{
    plLightGrpComponent* liGrp = plLightGrpComponent::GetComp(templ);
    if( liGrp )
    {
        const hsTArray<plLightInfo*>& lights = liGrp->GetLightInfos();
        int i;
        for( i = 0; i < lights.GetCount(); i++ )
        {
            fGroup->ISendToSelf(plClusterGroup::kRefLight, lights[i]);
        }
    }
    if( templ->HasFade() )
    {
        hsScalar maxDist = 0;
        hsScalar minDist = 0;

        Box3 fade = templ->GetFade();
        const hsScalar kMaxMaxDist = 1.e10f;
        if( fade.Min()[2] < 0 )
        {
            minDist = fade.Min()[0];
            maxDist = kMaxMaxDist;
        }

        if( fade.Max()[2] > 0 )
            maxDist = fade.Max()[0];

        if( maxDist > minDist )
        {
            fGroup->fLOD.Set(minDist, maxDist);
        }
    }
    hsTArray<plVisRegion*> regions;
    plVisRegionComponent::CollectRegions(templ, regions);
    plEffVisSetComponent::CollectRegions(templ, regions);
    if( regions.GetCount() )
    {
        int i;
        for( i = 0; i < regions.GetCount(); i++ )
        {
            fGroup->ISendToSelf(plClusterGroup::kRefRegion, regions[i]);
        }
    }
}

class sortData
{
public:
    UInt16          fIdx0;
    UInt16          fIdx1;
    UInt16          fIdx2;
    hsScalar        fDist;

    sortData() {}
    sortData(UInt16 idx0, UInt16 idx1, UInt16 idx2, hsScalar dist)
        : fIdx0(idx0), fIdx1(idx1), fIdx2(idx2), fDist(dist)
    {
    }

    bool operator<(const sortData& ot) const { return fDist < ot.fDist; }
    bool operator>(const sortData& ot) const { return fDist > ot.fDist; }
    bool operator==(const sortData& ot) const { return fDist == ot.fDist; }
    bool operator!=(const sortData& ot) const { return fDist != ot.fDist; }
};

void plClusterUtil::ISortTemplate(plSpanTemplateB* templ) const
{
    UInt16* indexData = templ->fIndices;
    const int numTris = templ->NumTris();
    typedef std::vector<sortData> sortVec;
    sortVec vec;
    vec.resize(numTris);
    sortVec::iterator iter;
    for( iter = vec.begin(); iter != vec.end(); iter++ )
    {
        iter->fIdx0 = indexData[0];
        iter->fIdx1 = indexData[1];
        iter->fIdx2 = indexData[2];
        hsPoint3 pos;
        pos = *templ->Position(indexData[0]);
        float dist0 = pos.fX * pos.fX + pos.fY * pos.fY;
        pos = *templ->Position(indexData[1]);
        float dist1 = pos.fX * pos.fX + pos.fY * pos.fY;
        pos = *templ->Position(indexData[2]);
        float dist2 = pos.fX * pos.fX + pos.fY * pos.fY;

        iter->fDist = dist0 > dist1
            ? (dist0 > dist2
                ? dist0
                : dist2)
            : (dist1 > dist2
                ? dist1
                : dist2);

        indexData += 3;
    }

    std::sort(vec.begin(), vec.end(), std::less<sortData>());

    indexData = templ->fIndices;
    for( iter = vec.begin(); iter != vec.end(); iter++ )
    {
        indexData[0] = iter->fIdx0;
        indexData[1] = iter->fIdx1;
        indexData[2] = iter->fIdx2;
        
        indexData += 3;
    }
}

void plClusterUtil::ITemplateFromGeo(plSpanTemplateB* templ, plGeometrySpan* geo)
{
    UInt16 format = plSpanTemplate::MakeFormat(
        true, // hasColor
        geo->GetNumUVs(), // UVW count
        geo->fFormat & plGeometrySpan::kSkinIndices, // hasWgtIdx
        (geo->fFormat & plGeometrySpan::kSkinWeightMask) >> 4, // NumWeights
        true, // hasNorm
        true // hasPos;
        );
    

    UInt32 numVerts = geo->fNumVerts;
    UInt32 numTris = geo->fNumIndices / 3;
    
    // Alloc it.
    templ->Alloc(format, numVerts, numTris);
    templ->AllocColors();

    UInt32 numPos = templ->NumPos();
    UInt32 numNorm = templ->NumNorm();
    UInt32 numUVWs = templ->NumUVWs();
    UInt32 numWeights = templ->NumWeights();
    UInt32 numColor = templ->NumColor();
    UInt32 numColor2 = templ->NumColor2();
    UInt32 numWgtIdx = templ->NumWgtIdx();

    // Fill in the data.
    memcpy(templ->fIndices, geo->fIndexData, templ->IndexSize());

    int i;
    for( i = 0; i < templ->NumVerts(); i++ )
    {
        float wgt[4];
        UInt32 wgtIdx;

        geo->ExtractInitColor(i, templ->MultColor(i), templ->AddColor(i));

        hsColorRGBA color;
        geo->ExtractVertex(i, templ->Position(i), templ->Normal(i), &color);

        if( templ->NumColor() )
            *templ->Color(i) = color.ToARGB32();
        if( templ->NumColor2() )
            *templ->Color2(i) = 0; 

        int k;
        for( k = 0; k < templ->NumUVWs(); k++ )
        {
            geo->ExtractUv(i, k, templ->UVWs(i, k));
        }
        
        if( templ->NumWeights() )
        {
            geo->ExtractWeights(i, wgt, &wgtIdx);
            int j;
            for( j = 0; j < templ->NumWeights(); j++ )
                *templ->Weight(i, j) = wgt[j];
            if( templ->NumWgtIdx() )
                *templ->WgtIdx(i) = wgtIdx;
        }
    }

    // Compute the local bounds.
    templ->ComputeBounds();

    ISortTemplate(templ);
}

plSpanTemplateB* plClusterUtil::IAddTemplate(plMaxNode* templNode, plGeometrySpan* geo)
{
    // Shade our mesh.
    // STUB

    // Create our blank template
    plSpanTemplateB* templ = TRACKED_NEW plSpanTemplateB(templNode);

    templ->fRenderLevel = templNode->GetRenderLevel(!templNode->GetNoDeferDraw());

    ITemplateFromGeo(templ, geo);

    return templ;
}

void plClusterUtil::IAddTemplates(plMaxNode* templNode, plSpanTemplTab& templs)
{
    // STUB
    // Get the Mesh

    // Figure the format and total number of verts.
    // If we're lazy or pressed for time we could use MeshConverter.
    // But we'd probably spend more time undoing MeshConverter hacks than if we start
    // from scratch.
    // But, here we go descending cheerully into hell.
    // At least with this interface we can bail and do it right later without to much
    // bloodshed.
    hsTArray<plGeometrySpan*> spanArray;
    if( !plMeshConverter::Instance().CreateSpans(templNode, spanArray, false) )
        return;

    plLightMapGen::Instance().Open(::GetCOREInterface(), ::GetCOREInterface()->GetTime(), false);
    hsVertexShader::Instance().Open();

    hsVertexShader::Instance().ShadeNode(templNode, 
                templNode->GetLocalToWorld44(), templNode->GetWorldToLocal44(), 
                spanArray);

    plLightMapGen::Instance().Close();
    hsVertexShader::Instance().Close();

    int i;
    for( i = 0; i < spanArray.GetCount(); i++ )
    {
        plSpanTemplateB* templ = IAddTemplate(templNode, spanArray[i]);
        templs.Append(1, &templ);
        templ->fMaterial = spanArray[i]->fMaterial;

        delete spanArray[i];
    }
}

Box3 plClusterUtil::IBound(const plL2WTab& src) const
{
    Box3 box;
    int i;
    for( i = 0; i < src.Count(); i++ )
    {
        box += src[i].GetTrans();
    }
    return box;
}

Point3 plClusterUtil::ILength(const plL2WTab& src) const
{
    Box3 box = IBound(src);
    return box.Max() - box.Min();
}

int plClusterUtil::ISelectAxis(const plL2WTab& src) const
{
    Box3 box = IBound(src);
    Point3 del = box.Max() - box.Min();
    if( del.x > del.y )
    {
        if( del.x > del.z )
            return 0;
        else
            return 2;
    }
    if( del.y > del.z )
        return 1;

    return 2;
}

static int sortAxis = 0;
static int cmp(const void *elem1, const void *elem2) 
{
    Matrix3* m1 = (Matrix3*) elem1;
    Matrix3* m2 = (Matrix3*) elem2;

    float d1 = m1->GetTrans()[sortAxis];
    float d2 = m2->GetTrans()[sortAxis];

    if( d1 < d2 )
        return -1;
    else if( d1 > d2 )
        return 1;

    return 0;
}


hsBool plClusterUtil::ISplitCluster(plSpanTemplateB* templ, plL2WTab& src, plL2WTab& lo, plL2WTab& hi)
{
    // Tried this, seems to work pretty well, but a more even grid is probably wiser at
    // this point.
#if 0 // MAX_SEP
    if( src.Count() <= fMinInsts)
        return false;

    // Pick an axis
    sortAxis = ISelectAxis(src);

    if( src.Count() < fMaxInsts)
    {
        Point3 len = ILength(src);
        if( len[sortAxis] < fMinSize )
            return false;
    }

    // Sort by that axis
    src.Sort(cmp);

    // Find the biggest gap
    float maxDist = 0;
    int pivot = 0;
    int i;
    for( i = 1; i < src.Count(); i++ )
    {
        float dist = src[i].GetTrans()[sortAxis] - src[i-1].GetTrans()[sortAxis];
        if( dist > maxDist )
        {
            maxDist = dist;
            pivot = i;
        }
    }
    hsAssert((pivot > 0) && (pivot < src.Count()), "Invalid pivot found");

    // Put everyone above it in hi, below it in lo
    lo.Append(pivot, src.Addr(0));
    hi.Append(src.Count()-pivot, src.Addr(pivot));

#else // MAX_SEP

    if( src.Count() <= fMinInsts )
        return false;

    // Pick an axis
    sortAxis = ISelectAxis(src);

    if( src.Count() < fMaxInsts)
    {
        Point3 len = ILength(src);
        if( len[sortAxis] < fMinSize )
            return false;
    }

    // Sort by that axis
    src.Sort(cmp);

    int pivot = src.Count() >> 1;
    lo.Append(pivot, src.Addr(0));
    hi.Append(src.Count()-pivot, src.Addr(pivot));
#endif // MAX_SEP

    return true;
}

void plClusterUtil::IFindClustersRecur(plSpanTemplateB* templ, plL2WTab& src, plL2WTabTab& dst)
{
    plL2WTab lo;
    plL2WTab hi;

    if( ISplitCluster(templ, src, lo, hi) )
    {
        // Keep going
        IFindClustersRecur(templ, lo, dst);
        IFindClustersRecur(templ, hi, dst);
    }
    else
    {
        plL2WTab* tab = TRACKED_NEW plL2WTab(src);
        dst.Append(1, &tab);
    }
}

void plClusterUtil::IFreeClustersRecur(plL2WTabTab& dst) const
{
    int i;
    for( i = 0; i < dst.Count(); i++ )
        delete dst[i];
}

inline hsScalar inlGetAlpha(UInt32* color)
{
    return hsScalar(*color >> 24) / 255.99f;
}

plSpanEncoding plClusterUtil::ISelectEncoding(plPoint3TabTab& delPosTab, plColorTabTab& colorsTab)
{
    hsBool hasColor = false;
    hsBool hasAlpha = false;
    hsScalar maxLenSq = 0;
    hsScalar maxX = 0;
    hsScalar maxY = 0;
    hsScalar maxZ = 0;
    int i;
    for( i = 0; i < delPosTab.Count(); i++ )
    {
        int j;
        if( delPosTab[i] )
        {
            plPoint3Tab& delPos = *delPosTab[i];
            for( j = 0; j < delPos.Count(); j++ )
            {
                hsScalar lenSq = delPos[j].MagnitudeSquared();
                if( lenSq > maxLenSq )
                    maxLenSq = lenSq;
                hsScalar d = fabs(delPos[j].fX);
                if( d > maxX )
                    maxX = d;
                d = fabs(delPos[j].fY);
                if( d > maxY )
                    maxY = d;
                d = fabs(delPos[j].fZ);
                if( d > maxZ )
                    maxZ = d;

            }
        }

        if( colorsTab[i] )
        {
            plColorTab& color = *colorsTab[i];
            for( j = 0; j < color.Count(); j++ )
            {
                UInt32 col = color[j];
                if( (col & 0x00ffffff) != 0x00ffffff )
                    hasColor = true;
                if( (col & 0xff000000) != 0xff000000 )
                    hasAlpha = true;
            }
        }
    }

    UInt32 code = 0;
    hsScalar posScale = 1.f;

    if( hasColor && hasAlpha )
        code |= plSpanEncoding::kColAI88;
    else if( hasColor )
        code |= plSpanEncoding::kColI8;
    else if( hasAlpha )
        code |= plSpanEncoding::kColA8;

    plConst(hsScalar) kPosQuantum(0.5 / 12.f); // 1/2 inch.
    hsScalar maxLen = hsSquareRoot(maxLenSq);
    if( maxLen > kPosQuantum )
    {
        if( (maxX < kPosQuantum) && (maxY < kPosQuantum) )
        {
            code |= plSpanEncoding::kPos008;
            posScale = maxLen / 255.9f;
        }
        else if( (maxLen / 255.9f) < kPosQuantum )
        {
            code |= plSpanEncoding::kPos888;
            posScale = maxLen / 255.9f;
        }
        else if( (maxLen / hsScalar(1 << 10)) < kPosQuantum )
        {
            code |= plSpanEncoding::kPos101010;
            posScale = maxLen / hsScalar(1 << 10);
        }
        else
        {
            code |= plSpanEncoding::kPos161616;
            posScale = maxLen / hsScalar(1 << 16);
        }
    }
    return plSpanEncoding(code, posScale);
}

static int CompTemplates(const void *elem1, const void *elem2) 
{
    plSpanTemplateB* templA = *((plSpanTemplateB**)elem1);
    plSpanTemplateB* templB = *((plSpanTemplateB**)elem2);

    hsScalar hA = templA->GetLocalBounds().GetMaxs().fZ;
    hsScalar hB = templB->GetLocalBounds().GetMaxs().fZ;

    if( hA < hB )
        return -1;

    if( hA > hB )
        return 1;

    return 0;
}

void plClusterUtil::ISortTemplates(plSpanTemplTab& templs) const
{
    templs.Sort(CompTemplates);

    float maxZ = -1.e33f;

    int i;
    for( i = 1; i < templs.Count(); i++ )
    {
        templs[i]->fRenderLevel.Set(templs[i-1]->fRenderLevel.Level() + 1);
    }
}

plSpanTemplTab plClusterUtil::MakeTemplates(INode* templNode)
{
    plSpanTemplTab templs;
    IAddTemplates((plMaxNode*)templNode, templs);
    ISortTemplates(templs);
    return templs;
}

void plClusterUtil::AddClusters(plL2WTab& insts, plDeformVert* def, plShadeVert* shade)
{
    plPoint3TabTab delPos;
    plColorTabTab colors;

    plL2WTabTab clusters;
    IFindClustersRecur(fTemplate, insts, clusters);

    int j;
    for( j = 0; j < clusters.Count(); j++ )
    {
        // Create a plCluster to hold them all.
        plCluster* cluster = fGroup->IAddCluster();

        // Get the delPositions and colors for all the instances
        IAllocPosAndColor(fTemplate, *clusters[j], delPos, colors);

        IDelPosAndColor(fTemplate, 
                            *clusters[j],
                            def, shade,
                            delPos, colors);


        // Look through the results and pick out a proper encoding
        plSpanEncoding code = ISelectEncoding(delPos, colors);
        cluster->SetEncoding(code);

        // Now create, encode and add all the insts to the cluster.
        IAddInstsToCluster(cluster, fTemplate, *clusters[j], delPos, colors);

        IFreePosAndColor(delPos, colors);
    }
    
    IFreeClustersRecur(clusters);
}

void plClusterUtil::IAddInstsToCluster(plCluster* cluster, plSpanTemplateB* templ, 
                                       const plL2WTab& insts, 
                                       plPoint3TabTab& delPos, 
                                       plColorTabTab& colors)
{
    int i;
    for( i = 0; i < insts.Count(); i++ )
    {
        plSpanInstance* span = TRACKED_NEW plSpanInstance;
        span->Alloc(cluster->GetEncoding(), templ->NumVerts());

        span->SetLocalToWorld(plMaxNodeBase::Matrix3ToMatrix44(insts[i]));

        span->Encode(cluster->GetEncoding(), templ->NumVerts(),
            delPos[i] ? delPos[i]->Addr(0) : nil,
            colors[i] ? colors[i]->Addr(0) : nil);

        cluster->IAddInst(span);
    }
}


void plClusterUtil::IAllocPosAndColor(plSpanTemplateB* templ, const plL2WTab& insts,
                                    plPoint3TabTab& delPos, plColorTabTab& colors)
{
    delPos.SetCount(insts.Count());
    colors.SetCount(insts.Count());

    const int numVerts = templ->NumVerts();
    int i;
    for( i = 0; i < insts.Count(); i++ )
    {
        delPos[i] = nil;
        colors[i] = nil;
    }
}

void plClusterUtil::IFreePosAndColor(plPoint3TabTab& delPos, plColorTabTab& colors) const
{
    int i;
    for( i = 0; i < delPos.Count(); i++ )
        delete delPos[i];
    for( i = 0; i < colors.Count(); i++ )
        delete colors[i];
}

void plClusterUtil::IDelPosAndColor(plSpanTemplateB* templ, 
                                    const plL2WTab& insts, plDeformVert* def, plShadeVert* shade,
                                    plPoint3TabTab& delPos, plColorTabTab& colors)
{

    hsBool doDef = def != nil;
    hsBool doCol = shade != nil;
    // For each inst
    int i;
    for( i = 0; i < insts.Count(); i++ )
    {
        hsBounds3Ext wBnd = templ->GetLocalBounds();
        hsMatrix44 l2w = plMaxNodeBase::Matrix3ToMatrix44(insts[i]);
        hsMatrix44 w2l;
        l2w.GetInverse(&w2l);
        hsMatrix44 w2lT;
        w2l.GetTranspose(&w2lT);

        wBnd.Transform(&l2w);

        if( doDef )
        {
            def->Begin(templ->GetSrcNode(), wBnd);

            delPos[i] = TRACKED_NEW plPoint3Tab;
            delPos[i]->SetCount(templ->NumVerts());
            int j;
            for( j = 0; j < templ->NumVerts(); j++ )
            {
                hsPoint3 p = l2w * *templ->Position(j);
                plPoint3Tab& dp = *delPos[i];
                dp[j] = def->GetDel(p);
                dp[j] = w2l * dp[j];
            }
            
            def->End();
        }



        // Make the stored colors the actual output UInt32.
        // templ has the mult and add colors, apply them here.
        if( doCol )
        {
            shade->Begin(templ->GetSrcNode(), wBnd);

            colors[i] = TRACKED_NEW plColorTab;
            colors[i]->SetCount(templ->NumVerts());
            int j;
            for( j = 0; j < templ->NumVerts(); j++ )
            {
                hsPoint3 pos = *templ->Position(j);
                pos += (*delPos[i])[j];
                pos = l2w * pos;

                hsVector3 norm = *templ->Normal(j);
                norm = w2lT * norm;
                
                Color rgb = shade->GetShade(pos, norm);

                rgb *= Color(templ->MultColor(j)->r, templ->MultColor(j)->g, templ->MultColor(j)->b);
                rgb += Color(templ->AddColor(j)->r, templ->AddColor(j)->g, templ->AddColor(j)->b);

                (*colors[i])[j] = hsColorRGBA().Set(rgb.r, rgb.g, rgb.b, templ->MultColor(j)->a).ToARGB32();
            }
            shade->End();
        }

    }
}