//---------------------------------------------------
// Retrieve the bind pose for a controller/joint std::pair
//
MMatrix DagHelper::getBindPoseInverse ( const MObject& controller, const MObject& influence )
{
MStatus status;
if ( controller.apiType() == MFn::kSkinClusterFilter )
{
MFnSkinCluster controllerFn ( controller );
// Find the correct index for the pre-bind matrix
uint index = controllerFn.indexForInfluenceObject ( MDagPath::getAPathTo ( influence ), &status );
if ( status != MStatus::kSuccess ) return MMatrix::identity;
MPlug preBindMatrixPlug = controllerFn.findPlug ( "bindPreMatrix", &status );
preBindMatrixPlug = preBindMatrixPlug.elementByLogicalIndex ( index, &status );
if ( status != MStatus::kSuccess ) return MMatrix::identity;
// Get the plug's matrix
MMatrix ret;
if ( !DagHelper::getPlugValue ( preBindMatrixPlug, ret ) ) return MMatrix::identity;
return ret;
}
else if ( controller.apiType() == MFn::kJointCluster )
{
MMatrix ret;
DagHelper::getPlugValue ( influence, "bindPose", ret );
return ret.inverse();
}
else return MMatrix::identity;
}
