// --------------------------------------------------------
void GeometryPolygonExporter::exportPolygonSources (
MFnMesh& fnMesh,
const String& meshId,
MStringArray& uvSetNames,
MStringArray& colorSetNames,
Sources* polygonSources,
Sources* vertexSources,
const bool hasFaceVertexNorms )
{
// Initialize the members
mMeshId = meshId;
mUvSetNames = uvSetNames;
mPolygonSources = polygonSources;
mVertexSources = vertexSources;
mHasFaceVertexNormals = hasFaceVertexNorms;
mColorSetNames = colorSetNames;
// If triangulation is requested, verify that it is
// feasible by checking with all the mesh polygons
if ( ExportOptions::exportTriangles() )
{
triangulated = true;
for ( MItMeshPolygon polyIt ( fnMesh.object() ); triangulated && !polyIt.isDone(); polyIt.next() )
{
triangulated = polyIt.hasValidTriangulation();
}
}
// If we have a hole in a polygon, we can't write a <polylist>.
// Either we write <polygons> with holes or we write triangles.
// Get hole information from the mesh node.
// The format for the holes information is explained in the MFnMesh documentation.
MStatus status;
fnMesh.getHoles ( mHoleInfoArray, mHoleVertexArray, &status );
holeCount = ( status != MStatus::kSuccess ) ? 0 : ( mHoleInfoArray.length() / 3 );
// Find how many shaders are used by this instance of the mesh.
// Each instance may apply a number of different materials to different faces.
// We can use the getConnectedShaders member function of MFnMesh to find out
// this shader information for each instance.
mShaders.clear();
mShaderIndices.clear();
fnMesh.getConnectedShaders ( 0, mShaders, mShaderIndices );
// Find the polygons that correspond to each materials and export them.
uint realShaderCount = ( uint ) mShaders.length();
uint numShaders = ( uint ) std::max ( ( size_t ) 1, ( size_t ) mShaders.length() );
for ( uint shaderPosition=0; shaderPosition<numShaders; ++shaderPosition )
{
// Set the current shader position
mShaderPosition = shaderPosition;
// Export the polygons of the current shader
exportShaderPolygons ( fnMesh );
}
}
