private ulong GetMaterialGeoKey(HxScene.GeometryNode node, out int materialIndex, out int geoIndex)
{
if (geometryCollection.TryGetValue(node.Geometry, out geoIndex))
{
if (node is HxScene.MaterialGeometryNode materialNode && materialNode.Material != null &&
materialCollection.TryGetValue(materialNode.Material, out materialIndex))
{
return(GetMaterialGeoKey(materialIndex, geoIndex));
}
else
{
materialIndex = 0;
return(GetMaterialGeoKey(0, geoIndex));
}
}
/// <summary>
/// Creates the mesh information. Since Assimp requires each mesh has one material only.
/// Geometry has to be duplicated if they are using different material
/// </summary>
/// <param name="geoNode">The geo node.</param>
/// <returns></returns>
private MeshInfo OnCreateMeshInfo(HxScene.GeometryNode geoNode)
{
MeshInfo info = null;
if (geoNode is HxScene.MaterialGeometryNode materialNode && materialNode.Material != null)
{
var key = GetMaterialGeoKey(geoNode, out var materialIndex, out var geoIndex);
if (!meshInfos.TryGetValue(key, out var existing))
{
info = new MeshInfo(key, geoNode.Geometry, geoNode.Name, geoIndex, materialIndex);
}
else
{
info = existing;
}
if (info != null && info.Bones == null && materialNode is HxScene.BoneSkinMeshNode boneNode)
{
info.Bones = boneNode.Bones;
}
}
return(info);
}
