dirty_vertex_ranges()

std::vector< GraphicsOperator::DirtyVertexRange > MayaFlux::Nodes::Network::PathOperator::dirty_vertex_ranges ( ) const

overridevirtual

One DirtyVertexRange per path whose PathGeneratorNode needs a GPU update, so add_control_point() on one path re-uploads only that path's vertices.

Ranges are in add_path() order, matching get_vertex_data() and build_cluster_ids(); group_index is the path index and feeds get_vertex_data_for_collection(). Empty when no path changed.

Reimplemented from MayaFlux::Nodes::Network::GraphicsOperator.

Definition at line 220 of file PathOperator.cpp.

{
    std::vector<DirtyVertexRange> ranges;
 
    uint32_t offset = 0;
    uint32_t index = 0;
    for (const auto& path : m_paths) {
        const auto count = static_cast<uint32_t>(path->get_vertex_count());
        if (path->needs_gpu_update()) {
            ranges.push_back(DirtyVertexRange {
                .group_index = index,
                .vertex_offset = offset,
                .vertex_count = count });
        }
        offset += count;
        ++index;
    }
 
    return ranges;
}

References count, MayaFlux::Nodes::Network::GraphicsOperator::DirtyVertexRange::group_index, index, m_paths, and offset.