Imath::Box3d HoudiniScene::readBound( double time ) const
{
OP_Node *node = retrieveNode( true );
Imath::Box3d bounds;
UT_BoundingBox box;
OP_Context context( time );
/// \todo: this doesn't account for SOPs containing multiple shapes
/// if we fix it, we need to fix the condition below as well
if ( node->getBoundingBox( box, context ) )
{
bounds = IECore::convert<Imath::Box3d>( box );
}
// paths embedded within a sop already have bounds accounted for
if ( m_contentIndex )
{
return bounds;
}
NameList children;
childNames( children );
for ( NameList::iterator it=children.begin(); it != children.end(); ++it )
{
ConstSceneInterfacePtr childScene = child( *it );
Imath::Box3d childBound = childScene->readBound( time );
if ( !childBound.isEmpty() )
{
bounds.extendBy( Imath::transform( childBound, childScene->readTransformAsMatrix( time ) ) );
}
}
return bounds;
}
MBoundingBox convert( const Imath::Box3d &from )
{
if( from.isEmpty() )
{
return MBoundingBox();
}
return MBoundingBox( convert<MPoint>( from.min ), convert<MPoint>( from.max ) );
}
static Imath::Box3d getBoundingBox(const V3d& offset, const std::vector<float>& vertices)
{
Imath::Box3d bbox;
for (size_t i = 0; i < vertices.size(); i+=3)
bbox.extendBy(V3d(vertices[i], vertices[i+1], vertices[i+2]));
if (!bbox.isEmpty())
{
bbox.min += offset;
bbox.max += offset;
}
return bbox;
}