IECoreScene::PrimitiveVariable FromMayaMeshConverter::uvs( const MString &uvSet, const std::vector<int> &vertsPerFace ) const
{
MFnMesh fnMesh( object() );
IntVectorDataPtr indexData = new IntVectorData;
vector<int> &indices = indexData->writable();
indices.reserve( fnMesh.numFaceVertices() );
// get uv data. A list of uv counts per polygon, and a bunch of uv ids:
MIntArray uvCounts, uvIds;
fnMesh.getAssignedUVs( uvCounts, uvIds, &uvSet );
int uvIdIndex = 0;
for( size_t i=0; i < vertsPerFace.size(); ++i )
{
int numPolyUvs = uvCounts[i];
int numPolyVerts = vertsPerFace[i];
if( numPolyUvs == 0 )
{
for( int j=0; j < numPolyVerts; ++j )
{
indices.push_back( 0 );
}
}
else
{
for( int j=0; j < numPolyVerts; ++j )
{
indices.push_back( uvIds[ uvIdIndex++ ] );
}
}
}
V2fVectorDataPtr uvData = new V2fVectorData;
uvData->setInterpretation( GeometricData::UV );
std::vector<Imath::V2f> &uvs = uvData->writable();
MFloatArray uArray, vArray;
fnMesh.getUVs( uArray, vArray, &uvSet );
size_t numIndices = indices.size();
if( uArray.length() == 0 )
{
uvs.resize( numIndices, Imath::V2f( .0f ) );
}
else
{
uvs.reserve( uArray.length() );
for( size_t i=0; i < uArray.length(); ++i )
{
uvs.emplace_back( uArray[i], vArray[i] );
}
}
return PrimitiveVariable( PrimitiveVariable::FaceVarying, uvData, indexData );
}
IECore::ConstObjectPtr MapProjection::computeProcessedObject( const ScenePath &path, const Gaffer::Context *context, IECore::ConstObjectPtr inputObject ) const
{
// early out if it's not a primitive with a "P" variable
const Primitive *inputPrimitive = runTimeCast<const Primitive>( inputObject.get() );
if( !inputPrimitive )
{
return inputObject;
}
const V3fVectorData *pData = inputPrimitive->variableData<V3fVectorData>( "P" );
if( !pData )
{
return inputObject;
}
// early out if the uv set name hasn't been provided
const string uvSet = uvSetPlug()->getValue();
if( uvSet == "" )
{
return inputObject;
}
// get the camera and early out if we can't find one
ScenePath cameraPath;
ScenePlug::stringToPath( cameraPlug()->getValue(), cameraPath );
ConstCameraPtr constCamera = runTimeCast<const Camera>( inPlug()->object( cameraPath ) );
if( !constCamera )
{
return inputObject;
}
M44f cameraMatrix = inPlug()->fullTransform( cameraPath );
M44f objectMatrix = inPlug()->fullTransform( path );
M44f objectToCamera = objectMatrix * cameraMatrix.inverse();
bool perspective = constCamera->getProjection() == "perspective";
Box2f normalizedScreenWindow;
if( constCamera->hasResolution() )
{
normalizedScreenWindow = constCamera->frustum();
}
else
{
// We don't know what resolution the camera is meant to render with, so take the whole aperture
// as the screen window
normalizedScreenWindow = constCamera->frustum( Camera::Distort );
}
// do the work
PrimitivePtr result = inputPrimitive->copy();
V2fVectorDataPtr uvData = new V2fVectorData();
uvData->setInterpretation( GeometricData::UV );
result->variables[uvSet] = PrimitiveVariable( PrimitiveVariable::Vertex, uvData );
const vector<V3f> &p = pData->readable();
vector<V2f> &uv = uvData->writable();
uv.reserve( p.size() );
for( size_t i = 0, e = p.size(); i < e; ++i )
{
V3f pCamera = p[i] * objectToCamera;
V2f pScreen = V2f( pCamera.x, pCamera.y );
if( perspective )
{
pScreen /= -pCamera.z;
}
uv.push_back(
V2f(
lerpfactor( pScreen.x, normalizedScreenWindow.min.x, normalizedScreenWindow.max.x ),
lerpfactor( pScreen.y, normalizedScreenWindow.min.y, normalizedScreenWindow.max.y )
)
);
}
return result;
}
IECore::ObjectPtr MeshFromNuke::doConversion( IECore::ConstCompoundObjectPtr operands ) const
{
// topology
IntVectorDataPtr verticesPerFaceData = new IntVectorData;
IntVectorDataPtr vertexIdsData = new IntVectorData;
std::vector<int> &verticesPerFace = verticesPerFaceData->writable();
std::vector<int> &vertexIds = vertexIdsData->writable();
unsigned numPrimitives = m_geo->primitives();
const DD::Image::Primitive **primitives = m_geo->primitive_array();
std::vector<unsigned> tmpFaceVertices;
for( unsigned primIndex=0; primIndex<numPrimitives; primIndex++ )
{
const DD::Image::Primitive *prim = primitives[primIndex];
unsigned numFaces = prim->faces();
for( unsigned faceIndex=0; faceIndex<numFaces; faceIndex++ )
{
unsigned numFaceVertices = prim->face_vertices( faceIndex );
verticesPerFace.push_back( numFaceVertices );
tmpFaceVertices.resize( numFaceVertices );
prim->get_face_vertices( faceIndex, &(tmpFaceVertices[0]) );
for( unsigned i=0; i<numFaceVertices; i++ )
{
vertexIds.push_back( prim->vertex( tmpFaceVertices[i] ) );
}
}
}
MeshPrimitivePtr result = new MeshPrimitive( verticesPerFaceData, vertexIdsData, "linear" );
// points
if( const DD::Image::PointList *pl = m_geo->point_list() )
{
V3fVectorDataPtr p = new V3fVectorData();
p->writable().resize( pl->size() );
std::transform( pl->begin(), pl->end(), p->writable().begin(), IECore::convert<Imath::V3f, DD::Image::Vector3> );
result->variables["P"] = PrimitiveVariable( PrimitiveVariable::Vertex, p );
}
// uvs
PrimitiveVariable::Interpolation uvInterpolation = PrimitiveVariable::Vertex;
const DD::Image::Attribute *uvAttr = m_geo->get_typed_group_attribute( DD::Image::Group_Points, "uv", DD::Image::VECTOR4_ATTRIB );
if( !uvAttr )
{
uvAttr = m_geo->get_typed_group_attribute( DD::Image::Group_Vertices, "uv", DD::Image::VECTOR4_ATTRIB );
uvInterpolation = PrimitiveVariable::FaceVarying;
}
if( uvAttr )
{
V2fVectorDataPtr uvData = new V2fVectorData();
uvData->setInterpretation( GeometricData::UV );
std::vector<Imath::V2f> &uvs = uvData->writable();
uvs.reserve( uvAttr->size() );
unsigned numUVs = uvAttr->size();
for( unsigned i=0; i<numUVs; i++ )
{
// as of Cortex 10, we take a UDIM centric approach
// to UVs, which clashes with Nuke, so we must flip
// the v values during conversion.
uvs.emplace_back( uvAttr->vector4( i ).x, 1.0 - uvAttr->vector4( i ).y );
}
result->variables["uv"] = PrimitiveVariable( uvInterpolation, uvData );
}
// normals
PrimitiveVariable::Interpolation nInterpolation = PrimitiveVariable::Vertex;
const DD::Image::Attribute *nAttr = m_geo->get_typed_group_attribute( DD::Image::Group_Points, "N", DD::Image::NORMAL_ATTRIB );
if( !nAttr )
{
nAttr = m_geo->get_typed_group_attribute( DD::Image::Group_Vertices, "N", DD::Image::NORMAL_ATTRIB );
nInterpolation = PrimitiveVariable::FaceVarying;
}
if( nAttr )
{
V3fVectorDataPtr nd = new V3fVectorData();
std::vector<Imath::V3f> &n = nd->writable();
n.resize( nAttr->size() );
for( unsigned i=0; i<n.size(); i++ )
{
n[i] = IECore::convert<Imath::V3f, DD::Image::Vector3>( nAttr->normal( i ) );
}
result->variables["N"] = PrimitiveVariable( nInterpolation, nd );
}
return result;
}