MObject createPoly(double iFrame, PolyMeshAndColors & iNode,
MObject & iParent)
{
Alembic::AbcGeom::IPolyMeshSchema schema = iNode.mMesh.getSchema();
MString name(iNode.mMesh.getName().c_str());
MObject obj;
// add other properties
if (!schema.isConstant())
{
MFloatPointArray emptyPt;
MIntArray emptyInt;
MFnMesh fnMesh;
obj = fnMesh.create(0, 0, emptyPt, emptyInt, emptyInt, iParent);
fnMesh.setName(name);
}
else
{
Alembic::AbcCoreAbstract::index_t index, ceilIndex;
double alpha = getWeightAndIndex(iFrame, schema.getTimeSampling(),
schema.getNumSamples(), index, ceilIndex);
Alembic::AbcGeom::IPolyMeshSchema::Sample samp;
schema.get(samp, Alembic::Abc::ISampleSelector(index));
MFloatPointArray ptArray;
Alembic::Abc::P3fArraySamplePtr ceilPoints;
if (index != ceilIndex)
{
Alembic::AbcGeom::IPolyMeshSchema::Sample ceilSamp;
schema.get(ceilSamp, Alembic::Abc::ISampleSelector(ceilIndex));
ceilPoints = ceilSamp.getPositions();
}
fillPoints(ptArray, samp.getPositions(), ceilPoints, alpha);
MFnMesh fnMesh;
fillTopology(fnMesh, iParent, ptArray, samp.getFaceIndices(),
samp.getFaceCounts());
fnMesh.setName(iNode.mMesh.getName().c_str());
setPolyNormals(iFrame, fnMesh, schema.getNormalsParam());
setUVs(iFrame, fnMesh, schema.getUVsParam());
obj = fnMesh.object();
}
MFnMesh fnMesh(obj);
MString pathName = fnMesh.partialPathName();
setInitialShadingGroup(pathName);
setColors(iFrame, fnMesh, iNode.mC3s, iNode.mC4s, true);
if ( !schema.getNormalsParam().valid() )
{
MFnNumericAttribute attr;
MString attrName("noNormals");
MObject attrObj = attr.create(attrName, attrName,
MFnNumericData::kBoolean, true);
attr.setKeyable(true);
attr.setHidden(false);
fnMesh.addAttribute(attrObj, MFnDependencyNode::kLocalDynamicAttr);
}
return obj;
}
void readPoly(double iFrame, MFnMesh & ioMesh, MObject & iParent,
PolyMeshAndColors & iNode, bool iInitialized)
{
Alembic::AbcGeom::IPolyMeshSchema schema = iNode.mMesh.getSchema();
Alembic::AbcGeom::MeshTopologyVariance ttype = schema.getTopologyVariance();
Alembic::AbcCoreAbstract::index_t index, ceilIndex;
double alpha = getWeightAndIndex(iFrame,
schema.getTimeSampling(), schema.getNumSamples(), index, ceilIndex);
MFloatPointArray pointArray;
Alembic::Abc::P3fArraySamplePtr ceilPoints;
// we can just read the points
if (ttype != Alembic::AbcGeom::kHeterogenousTopology && iInitialized)
{
Alembic::Abc::P3fArraySamplePtr points = schema.getPositionsProperty(
).getValue(Alembic::Abc::ISampleSelector(index));
if (alpha != 0.0)
{
ceilPoints = schema.getPositionsProperty().getValue(
Alembic::Abc::ISampleSelector(ceilIndex) );
}
fillPoints(pointArray, points, ceilPoints, alpha);
ioMesh.setPoints(pointArray, MSpace::kObject);
setColors(iFrame, ioMesh, iNode.mC3s, iNode.mC4s, !iInitialized);
if (schema.getNormalsParam().getNumSamples() > 1)
{
setPolyNormals(iFrame, ioMesh, schema.getNormalsParam());
}
if (schema.getUVsParam().getNumSamples() > 1)
{
setUVs(iFrame, ioMesh, schema.getUVsParam());
}
return;
}
// we need to read the topology
Alembic::AbcGeom::IPolyMeshSchema::Sample samp;
schema.get(samp, Alembic::Abc::ISampleSelector(index));
if (alpha != 0.0 && ttype != Alembic::AbcGeom::kHeterogenousTopology)
{
ceilPoints = schema.getPositionsProperty().getValue(
Alembic::Abc::ISampleSelector(ceilIndex) );
}
fillPoints(pointArray, samp.getPositions(), ceilPoints, alpha);
fillTopology(ioMesh, iParent, pointArray, samp.getFaceIndices(),
samp.getFaceCounts());
setPolyNormals(iFrame, ioMesh, schema.getNormalsParam());
setUVs(iFrame, ioMesh, schema.getUVsParam());
setColors(iFrame, ioMesh, iNode.mC3s, iNode.mC4s, !iInitialized);
}