Method loadFaceIndicesBuffer_

source/MRViewer/MRRenderLabelObject.cpp:480–501

}

RenderBufferRef<Vector3i> RenderLabelObject::loadFaceIndicesBuffer_()
{
    auto& glBuffer = GLStaticHolder::getStaticGLBuffer();
    if ( !( dirty_ & DIRTY_FACE ) || !objLabel_->labelRepresentingMesh() )
        return glBuffer.prepareBuffer<Vector3i>( faceIndicesSize_, !facesIndicesBuffer_.valid() );

    MR_TIMER;

    const auto& mesh = objLabel_->labelRepresentingMesh();
    const auto& topology = mesh->topology;
    auto numF = topology.lastValidFace() + 1;
    auto buffer = glBuffer.prepareBuffer<Vector3i>( faceIndicesSize_ = numF );

    BitSetParallelForAll( topology.getValidFaces(), [&] ( FaceId f )
    {
        if ( f >= numF )
            return;
        topology.getTriVerts( f, ( VertId( & )[3] ) buffer[int( f )] );
    } );

    return buffer;
}

MR_REGISTER_RENDER_OBJECT_IMPL( ObjectLabel, RenderLabelObject )