geode.cpp

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/*  Code for writing AC3D format files, constructs one object per Geode
 * since geodes only have 1 material, and AC3D allows multiple materials you
 * may not get an exact vopy of an ac3d file used as input.
 *
 * originally by Roger James.
 * upgraded to different types of Geometry primitive by Geoff Michel.
 * Old GeoSet parsing code is commented out - will be removed eventually.
 */
#include <assert.h>
#include <list>
#include <osg/Material>
#include <osg/Texture2D>
#include <osg/Drawable>
#include <osg/Geometry>
#include <limits>
#include <iomanip>

#include "Exception.h"
#include "Geode.h"

using namespace ac3d;
using namespace std;



void Geode::OutputVertex(int Index, const osg::IndexArray *pVertexIndices, const osg::Vec2 *pTexCoords, const osg::IndexArray *pTexIndices, ostream& fout)
{
    int LocalTexIndex;
    int LocalVertexIndex;
    if (NULL == pVertexIndices)
        LocalVertexIndex = Index;
    else
        LocalVertexIndex = pVertexIndices->index(Index);
    if (NULL != pTexCoords)
    {
        // Got some tex coords
        // Check for an index
        if (NULL != pTexIndices)
            // Access tex coord array indirectly
            LocalTexIndex = pTexIndices->index(Index);
        else
            LocalTexIndex  = Index;
        fout << LocalVertexIndex << " " << pTexCoords[LocalTexIndex][0] << " " << pTexCoords[LocalTexIndex][1] << std::endl;
    }
    else
        fout << LocalVertexIndex << " 0 0" << std::endl;
}

void Geode::OutputLines(const int iCurrentMaterial, const unsigned int surfaceFlags, 
                           const osg::IndexArray *pVertexIndices, const osg::Vec2 *pTexCoords, const osg::IndexArray *pTexIndices,const osg::DrawArrays* drawArray, ostream& fout)
{
    unsigned int indexEnd = drawArray->getFirst() + drawArray->getCount();
    for(unsigned int vindex=drawArray->getFirst(); vindex<indexEnd; vindex+=2)
    {
        OutputSurfHead(iCurrentMaterial,surfaceFlags,2, fout);
        OutputVertex(vindex, pVertexIndices, pTexCoords, pTexIndices, fout);
        OutputVertex(vindex+1, pVertexIndices, pTexCoords, pTexIndices, fout);
    }
}
void Geode::OutputLineStrip(const int iCurrentMaterial, const unsigned int surfaceFlags, 
                           const osg::IndexArray *pVertexIndices, const osg::Vec2 *pTexCoords, const osg::IndexArray *pTexIndices,const osg::DrawArrays* drawArray, ostream& fout)
{
    unsigned int indexEnd = drawArray->getFirst() + drawArray->getCount();
    OutputSurfHead(iCurrentMaterial,surfaceFlags,indexEnd-drawArray->getFirst(), fout);
    for(unsigned int vindex=drawArray->getFirst(); vindex<indexEnd; ++vindex)
    {
        OutputVertex(vindex, pVertexIndices, pTexCoords, pTexIndices, fout);
    }
}
void Geode::OutputLineLoop(const int iCurrentMaterial, const unsigned int surfaceFlags, 
                           const osg::IndexArray *pVertexIndices, const osg::Vec2 *pTexCoords, const osg::IndexArray *pTexIndices,const osg::DrawArrays* drawArray, ostream& fout)
{
    unsigned int indexEnd = drawArray->getFirst() + drawArray->getCount();
    OutputSurfHead(iCurrentMaterial,surfaceFlags,indexEnd-drawArray->getFirst(), fout);
    for(unsigned int vindex=drawArray->getFirst(); vindex<indexEnd; ++vindex)
    {
        OutputVertex(vindex, pVertexIndices, pTexCoords, pTexIndices, fout);
    }
}
void Geode::OutputTriangle(const int iCurrentMaterial, const unsigned int surfaceFlags, 
                           const osg::IndexArray *pVertexIndices, const osg::Vec2 *pTexCoords, const osg::IndexArray *pTexIndices,const osg::DrawArrays* drawArray, ostream& fout)
{
    unsigned int primCount = 0;
    unsigned int indexEnd = drawArray->getFirst() + drawArray->getCount();
    for(unsigned int vindex=drawArray->getFirst(); vindex<indexEnd; ++vindex,++primCount)
    {
        
        if ((primCount%3) == 0)
        {
            OutputSurfHead(iCurrentMaterial,surfaceFlags,3, fout);
        }
        OutputVertex(vindex, pVertexIndices, pTexCoords, pTexIndices, fout);
    }
}
void Geode::OutputTriangleStrip(const int iCurrentMaterial, const unsigned int surfaceFlags, 
                            const osg::IndexArray *pVertexIndices, const osg::Vec2 *pTexCoords, const osg::IndexArray *pTexIndices,const osg::DrawArrays* drawArray, std::ostream& fout)
{
    unsigned int indexEnd = drawArray->getFirst() + drawArray->getCount();
    unsigned int evenodd=0;
    for(unsigned int vindex=drawArray->getFirst(); vindex<indexEnd-2; ++vindex, evenodd++)
    {
        
        OutputSurfHead(iCurrentMaterial,surfaceFlags,3, fout);
        if (evenodd%2==0) {
            OutputVertex(vindex, pVertexIndices, pTexCoords, pTexIndices, fout);
            OutputVertex(vindex+1, pVertexIndices, pTexCoords, pTexIndices, fout);
        } else {
            OutputVertex(vindex+1, pVertexIndices, pTexCoords, pTexIndices, fout);
            OutputVertex(vindex, pVertexIndices, pTexCoords, pTexIndices, fout);
        }
        OutputVertex(vindex+2, pVertexIndices, pTexCoords, pTexIndices, fout);
    }
}
void Geode::OutputTriangleFan(const int iCurrentMaterial, const unsigned int surfaceFlags, 
                           const osg::IndexArray *pVertexIndices, const osg::Vec2 *pTexCoords, const osg::IndexArray *pTexIndices,const osg::DrawArrays* drawArray, std::ostream& fout)
{
    unsigned int indexEnd = drawArray->getFirst() + drawArray->getCount();
    for(unsigned int vindex=drawArray->getFirst()+1; vindex<indexEnd-1; ++vindex)
    {
        OutputSurfHead(iCurrentMaterial,surfaceFlags,3, fout);
        OutputVertex(drawArray->getFirst(), pVertexIndices, pTexCoords, pTexIndices, fout);
        OutputVertex(vindex, pVertexIndices, pTexCoords, pTexIndices, fout);
        OutputVertex(vindex+1, pVertexIndices, pTexCoords, pTexIndices, fout);
    }
}
void Geode::OutputQuads(const int iCurrentMaterial, const unsigned int surfaceFlags, 
                            const osg::IndexArray *pVertexIndices, const osg::Vec2 *pTexCoords, const osg::IndexArray *pTexIndices,const osg::DrawArrays* drawArray, std::ostream& fout)
{
    unsigned int primCount = 0;
    unsigned int indexEnd = drawArray->getFirst() + drawArray->getCount();
    for(unsigned int vindex=drawArray->getFirst(); vindex<indexEnd; ++vindex,++primCount)
    {
        
        if ((primCount%4) == 0)
        {
            OutputSurfHead(iCurrentMaterial,surfaceFlags,4, fout);
        }
        OutputVertex(vindex, pVertexIndices, pTexCoords, pTexIndices, fout);
    }
}
void Geode::OutputQuadStrip(const int iCurrentMaterial, const unsigned int surfaceFlags, 
                            const osg::IndexArray *pVertexIndices, const osg::Vec2 *pTexCoords, const osg::IndexArray *pTexIndices,const osg::DrawArrays* drawArray, std::ostream& fout)
{
    unsigned int indexEnd = drawArray->getFirst() + drawArray->getCount();
    for(unsigned int vindex=drawArray->getFirst(); vindex<indexEnd-2; vindex+=2)
    {
        OutputSurfHead(iCurrentMaterial,surfaceFlags,4, fout);
        OutputVertex(vindex, pVertexIndices, pTexCoords, pTexIndices, fout);
        OutputVertex(vindex+1, pVertexIndices, pTexCoords, pTexIndices, fout);
        OutputVertex(vindex+3, pVertexIndices, pTexCoords, pTexIndices, fout);
        OutputVertex(vindex+2, pVertexIndices, pTexCoords, pTexIndices, fout);
    }
}
void Geode::OutputPolygon(const int iCurrentMaterial, const unsigned int surfaceFlags, 
                            const osg::IndexArray *pVertexIndices, const osg::Vec2 *pTexCoords, const osg::IndexArray *pTexIndices,const osg::DrawArrays* drawArray, std::ostream& fout)
{
    unsigned int indexEnd = drawArray->getFirst() + drawArray->getCount();
    OutputSurfHead(iCurrentMaterial,surfaceFlags,drawArray->getCount(), fout);
    for(unsigned int vindex=drawArray->getFirst(); vindex<indexEnd; vindex++)
    {
        OutputVertex(vindex, pVertexIndices, pTexCoords, pTexIndices, fout);
    }
}
//=======  draw array length cases
void Geode::OutputLineDARR(const int iCurrentMaterial, const unsigned int surfaceFlags,
        const osg::IndexArray *pVertexIndices, const osg::Vec2 *pTexCoords, const osg::IndexArray *pTexIndices,const osg::DrawArrayLengths* drawArrayLengths, ostream& fout)
{
    unsigned int vindex = drawArrayLengths->getFirst();
    for(osg::DrawArrayLengths::const_iterator primItr = drawArrayLengths->begin(); primItr <drawArrayLengths->end(); ++primItr)
    {
        unsigned int localPrimLength;
        localPrimLength = 2;
        
        for(GLsizei primCount = 0; primCount < *primItr; ++primCount)
        {
            if ((primCount%localPrimLength)==0)
            {
                OutputSurfHead(iCurrentMaterial,surfaceFlags,localPrimLength, fout);
            }
            OutputVertex(vindex, pVertexIndices, pTexCoords, pTexIndices, fout);
            ++vindex;
        }
        
    }
}

void Geode::OutputTriangleDARR(const int iCurrentMaterial, const unsigned int surfaceFlags,
        const osg::IndexArray *pVertexIndices, const osg::Vec2 *pTexCoords, const osg::IndexArray *pTexIndices,const osg::DrawArrayLengths* drawArrayLengths, ostream& fout)
{
    unsigned int vindex = drawArrayLengths->getFirst();
    for(osg::DrawArrayLengths::const_iterator primItr = drawArrayLengths->begin(); primItr <drawArrayLengths->end(); ++primItr)
    {
        unsigned int localPrimLength;
        localPrimLength = 3;
        
        for(GLsizei primCount = 0; primCount < *primItr; ++primCount)
        {
            if ((primCount%localPrimLength)==0)
            {
                OutputSurfHead(iCurrentMaterial,surfaceFlags,localPrimLength, fout);
            }
            OutputVertex(vindex, pVertexIndices, pTexCoords, pTexIndices, fout);
            ++vindex;
        }
        
    }
}

void Geode::OutputQuadsDARR(const int iCurrentMaterial, const unsigned int surfaceFlags,
        const osg::IndexArray *pVertexIndices, const osg::Vec2 *pTexCoords, const osg::IndexArray *pTexIndices,const osg::DrawArrayLengths* drawArrayLengths, ostream& fout)
{
    unsigned int vindex = drawArrayLengths->getFirst();
    for(osg::DrawArrayLengths::const_iterator primItr = drawArrayLengths->begin(); primItr <drawArrayLengths->end()-4; primItr+=4)
    {
        unsigned int localPrimLength;
        localPrimLength = 4;
        
        for(GLsizei primCount = 0; primCount < *primItr; ++primCount)
        {
            OutputSurfHead(iCurrentMaterial,surfaceFlags,localPrimLength, fout);
            OutputVertex(vindex, pVertexIndices, pTexCoords, pTexIndices, fout);
            OutputVertex(vindex+1, pVertexIndices, pTexCoords, pTexIndices, fout);
            OutputVertex(vindex+2, pVertexIndices, pTexCoords, pTexIndices, fout);
            OutputVertex(vindex+3, pVertexIndices, pTexCoords, pTexIndices, fout);
            vindex+=4;
        }
        
    }
}
void Geode::OutputQuadStripDARR(const int iCurrentMaterial, const unsigned int surfaceFlags,
        const osg::IndexArray *pVertexIndices, const osg::Vec2 *pTexCoords, const osg::IndexArray *pTexIndices,const osg::DrawArrayLengths* drawArrayLengths, ostream& fout)
{
    unsigned int vindex = drawArrayLengths->getFirst();
    for(osg::DrawArrayLengths::const_iterator primItr = drawArrayLengths->begin(); primItr <drawArrayLengths->end()-2; primItr+=2)
    {
        unsigned int localPrimLength;
        localPrimLength = *primItr;
        
        for(GLsizei primCount = 0; primCount < *primItr; ++primCount)