public OutlinerScene()
{
objectCounter = 0;
objects = new Dictionary<Int32, OutlinerObject>();
layers = new Dictionary<Int32, OutlinerLayer>();
materials = new Dictionary<Int32, OutlinerMaterial>();
objects_by_parentHandle = new Dictionary<Int32, List<Int32>>();
objects_by_layerHandle = new Dictionary<Int32, List<Int32>>();
objects_by_materialHandle = new Dictionary<Int32, List<Int32>>();
layers_by_parentHandle = new Dictionary<Int32, List<Int32>>();
materials_by_parentHandle = new Dictionary<Int32, List<Int32>>();
AddMaterial(new OutlinerMaterial(this, UnassignedHandle, RootHandle, "", ""));
}