void OgreMeshDeserializer::readGeometry()
{
std::vector<char> vertexBuffer;
std::vector<OgreMeshDeserializer::VertexElement> elements;
unsigned int vertexCount = 0;
readInts(m_stream, &vertexCount, 1);
// Find optional geometry streams
if (!m_stream.eof()) {
unsigned short streamID = readChunk(m_stream);
while (!m_stream.eof() &&
(streamID == M_GEOMETRY_VERTEX_DECLARATION ||
streamID == M_GEOMETRY_VERTEX_BUFFER)) {
switch (streamID) {
case M_GEOMETRY_VERTEX_DECLARATION:
elements = readGeometryVertexDeclaration();
break;
case M_GEOMETRY_VERTEX_BUFFER:
vertexBuffer = readGeometryVertexBuffer(vertexCount);
break;
default:
skipChunk(m_stream);
}
// Get next stream
if (!m_stream.eof()) {
streamID = readChunk(m_stream);
}
}
if (!elements.empty()) {
for (auto& element : elements) {
if (element.vSemantic == VertexElementSemantic::VES_POSITION) {
size_t vertexSize = vertexBuffer.size() / vertexCount;
for (size_t i = 0; i < vertexCount; ++i) {
char* vertexStart = vertexBuffer.data() + (i * vertexSize);
char* positionStart = vertexStart + element.offset;
if (element.vType == VertexElementType::VET_FLOAT3) {
float* positions = reinterpret_cast<float*>(positionStart);
m_vertices.push_back(*positions);
positions++;
m_vertices.push_back(*positions);
positions++;
m_vertices.push_back(*positions);
}
}
}
}
}
if (!m_stream.eof()) {
// Backpedal back to start of non-submesh stream
backpedalChunkHeader(m_stream);
}
}
}
void readGeometry(IOReadBase* pRead, CSubMesh& subMesh)
{
unsigned int vertexCount = 0;
pRead->Read(&vertexCount,sizeof(unsigned int));
unsigned short streamID;
unsigned int uLength;
pRead->Read(&streamID,sizeof(unsigned short));
pRead->Read(&uLength,sizeof(unsigned int));
std::vector<GeometryVertexElement> setElement;
while(!pRead->IsEof() && (streamID == M_GEOMETRY_VERTEX_DECLARATION ||streamID == M_GEOMETRY_VERTEX_BUFFER ))
{
switch (streamID)
{
case M_GEOMETRY_VERTEX_DECLARATION:
readGeometryVertexDeclaration(pRead, setElement);
break;
case M_GEOMETRY_VERTEX_BUFFER:
readGeometryVertexBuffer(pRead, subMesh, setElement, vertexCount);
break;
}
// Get next stream
if (!pRead->IsEof())
{
pRead->Read(&streamID,sizeof(unsigned short));
pRead->Read(&uLength,sizeof(unsigned int));
}
}
if (!pRead->IsEof())
{
// Backpedal back to start of non-submesh stream
pRead->Move(-STREAM_OVERHEAD_SIZE);
}
}
void
OgreMeshReader::readGeometry(VertexElementStore &vertexElements)
{
OSG_OGRE_LOG(("OgreMeshReader::readGeometry\n"));
UInt32 vertCount = readUInt32(_is);
BufferVertexMap bufferMap;
OSG_OGRE_LOG(("OgreMeshReader::readGeometry: vertCount '%d'\n", vertCount));
bool stop = false;
while(_is)
{
readChunkHeader(_is);
switch(_header.chunkId)
{
case CHUNK_GEOMETRY_VERTEX_DECLARATION:
readGeometryVertexDeclaration(vertexElements, bufferMap);
break;
case CHUNK_GEOMETRY_VERTEX_BUFFER:
readGeometryVertexBuffer(vertCount, vertexElements, bufferMap);
break;
default:
OSG_OGRE_LOG(("OgreMeshReader::readGeometry: Unknown chunkId '0x%x'\n",
_header.chunkId));
stop = true;
break;
};
if(stop == true)
{
skip(_is, -_chunkHeaderSize);
break;
}
}
}
