bool LWOFile::LoadSURF(unsigned int iChunkSize)
{
Surface surf;
surf.m_vBaseColor[0] = 1.0f;
surf.m_vBaseColor[1] = 1.0f;
surf.m_vBaseColor[2] = 1.0f;
// SURF { name[S0], source[S0], attributes[SUB-CHUNK] * }
const char *pChunkEndPos=m_pData+iChunkSize;
// name
unsigned int iStrBytes=0;
if(!ReadS0(surf.m_strName,iStrBytes))
{
return false;
}
// source
if(!ReadS0(surf.m_strSource,iStrBytes))
{
return false;
}
// while there's data left
while(m_pData<pChunkEndPos)
{
// get chunk ID
unsigned int iID=0;
if(!ReadID4(iID)) return false;
// get chunk size
unsigned short iChunkSize=0;
if(!ReadU2(iChunkSize)) return false;
const char *pSubChunkEndPos=m_pData+iChunkSize;
// color
if(iID == ID4("COLR"))
{
// COLR { base-color[COL12], envelope[VX] }
// read values
if(!ReadF4(surf.m_vBaseColor[0])) return false;
if(!ReadF4(surf.m_vBaseColor[1])) return false;
if(!ReadF4(surf.m_vBaseColor[2])) return false;
}
// skip to end of sub-chunk
m_pData = pSubChunkEndPos;
if(iChunkSize%2==1) m_pData+=1;
}
m_Surfaces.push_back(surf);
return true;
}
bool LWOFile::LoadUVMap(unsigned int iChunkSize)
{
Layer *pLayer=GetLastLayer();
const char *pChunkEndPos=m_pData+iChunkSize-4;
unsigned short iDimension=0;
if(!ReadU2(iDimension))
{
return false;
}
// not 2 floats per vertex
if(iDimension!=2)
{
// just skip
m_pData+=iChunkSize-4-2;
AddError("Warning: UVMap has "+ConvertToString(iDimension)+" floats per vertex (2 expected)");
return true;
}
unsigned int iStrBytes=0;
std::string strName;
if(!ReadS0(strName,iStrBytes))
{
return false;
}
// VMAP { type[ID4], dimension[U2], name[S0],
// ( vert[VX], value[F4] # dimension )* }
UVMap *pUVMap=new UVMap();
pUVMap->m_strName=strName;
pUVMap->m_Values.resize(2*pLayer->m_iPoints);
pLayer->m_UVMaps.push_back(pUVMap);
float *pValues=&(pUVMap->m_Values[0]);
memset(pValues,0,sizeof(float)*2*pLayer->m_iPoints);
while(m_pData<pChunkEndPos)
{
unsigned int iVertexID=0;
if(!ReadVX(iVertexID)) return false;
if(iVertexID>=pLayer->m_iPoints) return false;
if(!ReadF4(pValues[iVertexID*2+0])) return false;
if(!ReadF4(pValues[iVertexID*2+1])) return false;
// flip v coordinate
pValues[iVertexID*2+1]=1-pValues[iVertexID*2+1];
}
return true;
}
bool LWOFile::LoadLAYR(unsigned int iChunkSize)
{
Layer *pLayer=new Layer();
m_Layers.push_back(pLayer);
// LAYR { number[U2], flags[U2], pivot[VEC12], name[S0], parent[U2] ? }
const char *pChunkEndPos=m_pData+iChunkSize;
if(!ReadU2(pLayer->m_iID)) return false;
if(!ReadU2(pLayer->m_iFlags)) return false;
if(!ReadF4(pLayer->m_vPivot[0])) return false;
if(!ReadF4(pLayer->m_vPivot[1])) return false;
if(!ReadF4(pLayer->m_vPivot[2])) return false;
if(!ReadS0(pLayer->m_strName)) return false;
// parent id is optional, so read it only if theres data left
if(m_pData<pChunkEndPos)
{
if(!ReadU2(pLayer->m_iParentID)) return false;
} else {
pLayer->m_iParentID=0;
}
return true;
}
bool LWOFile::LoadVMAD(unsigned int iChunkSize)
{
Layer *pLayer=GetLastLayer();
if(pLayer==NULL)
{
AddError("No LAYR before VMAD");
return false;
}
const char *pChunkEndPos=m_pData+iChunkSize;
// VMAD { type[ID4], dimension[U2], name[S0],
// ( vert[VX], poly[VX], value[F4] # dimension )* }
unsigned int iType=0;
if(!ReadID4(iType)) return false;
// type must be uvmap
if(iType!=ID4("TXUV"))
{
AddError("Warning: Unknown discontinuous vertex map type "+ID4ToString(iType));
m_pData+=iChunkSize-4;
return true;
}
// dimension
unsigned short iDimension=0;
if(!ReadU2(iDimension))
{
return false;
}
// not 2 floats per vertex
if(iDimension!=2)
{
AddError("Warning: Discontinuous UVMap has "+ConvertToString(iDimension)+" floats per vertex (2 expected)");
// skip
m_pData+=iChunkSize-4-2;
return true;
}
// name
unsigned int iStrBytes=0;
std::string strName;
if(!ReadS0(strName,iStrBytes))
{
return false;
}
// for each uvmap
UVMap *pUV=NULL;
for(unsigned int iUV=0;iUV<pLayer->m_UVMaps.size();iUV++)
{
if(pLayer->m_UVMaps[iUV]->m_strName==strName)
{
pUV=pLayer->m_UVMaps[iUV];
}
}
if(pUV==NULL)
{
AddError("No matching UVMap for discontinuous UVMap \""+strName+"\"");
return false;
}
// read rest of chunk to memory
//
unsigned int iBytesLeft=iChunkSize-4-2-iStrBytes;
UVMapD *pUVMap=new UVMapD();
pUVMap->m_strName=strName;
pUVMap->m_pUVMap=pUV;
// worst case estimate
pUVMap->m_Entries.reserve(iBytesLeft/(2+2+4+4));
pLayer->m_UVMapDs.push_back(pUVMap);
while(m_pData<pChunkEndPos)
{
unsigned int iVertexID=0;
if(!ReadVX(iVertexID)) return false;
unsigned int iPolyID=0;
if(!ReadVX(iPolyID)) return false;
UVMapD::Entry e;
e.iVertex=iVertexID;
e.iPolygon=iPolyID;
if(!ReadF4(e.u)) return false;
if(!ReadF4(e.v)) return false;
// flip v coordinate
e.v=1-e.v;
pUVMap->m_Entries.push_back(e);
}
return true;
}
void LWOReader::ReadVMAP( UInt32 pChunkSize, Bool pPerPoly )
{
UInt32 dataRead = 0;
UInt16 dimension;
LWIndex vertexIndex;
LWIndex polygonIndex;
LWVertexMap* newVertexMap = GD_NEW(LWVertexMap, this, "VertexMap");
newVertexMap->mPerPoly = pPerPoly;
dataRead += ReadID4( newVertexMap->mType );
dataRead += ReadU2( dimension );
dataRead += ReadS0( newVertexMap->mName );
while( dataRead < pChunkSize )
{
dataRead += ReadVX( vertexIndex );
newVertexMap->mVertexIndex.push_back( vertexIndex );
if( pPerPoly )
{
dataRead += ReadVX( polygonIndex );
newVertexMap->mPolygonIndex.push_back( polygonIndex );
}
LWMapValue mapping;
switch( newVertexMap->mType )
{
case ID_PICK:
mapping.mPick = vertexIndex;
break;
case ID_WGHT:
dataRead += ReadF4( mapping.mWeight );
break;
case ID_TXUV:
dataRead += ReadF4( mapping.mUV.U );
dataRead += ReadF4( mapping.mUV.V );
break;
case ID_RGB:
dataRead += ReadF4( mapping.mRGB.R );
dataRead += ReadF4( mapping.mRGB.G );
dataRead += ReadF4( mapping.mRGB.B );
break;
case ID_RGBA:
dataRead += ReadF4( mapping.mRGBA.R );
dataRead += ReadF4( mapping.mRGBA.G );
dataRead += ReadF4( mapping.mRGBA.B );
dataRead += ReadF4( mapping.mRGBA.A );
break;
case ID_MORF:
case ID_SPOT:
case ID_MNVW:
default:
dataRead += Skip( dimension * sizeof(Float) );
break;
}
newVertexMap->mValues.push_back( mapping );
}
GetCurrentLayer()->mVertexMaps.push_back( newVertexMap );
}
