public VimHelper(IRenderApi api, VimScene vim)
{
(Vim, Api) = (vim, api);
Api.Scene.GetNodeToInstanceTable(ref NodeIndices, ref Instances);
Debug.Assert(NodeIndices.Length == Instances.Length);
Flags = new bool[NodeIndices.Length];
for (var i = 0; i < NodeIndices.Length; ++i)
{
NodeIndexToInstanceIndex.Add(NodeIndices[i], i);
InstanceToNodeIndex.Add(Instances[i], NodeIndices[i]);
}
ElementIndexToSceneNode = Vim.GetElementIndexToSceneNodeMap();
}