/// <summary>
/// Create a new RenderQueueGroup
/// </summary>
/// <param name="renderGroup"></param>
private void AddNewRenderGroup(RenderQueueGroup renderGroup)
{
_queueGroups[renderGroup.Id] = renderGroup;
}
/// <summary>
/// Get a specific render queue group
/// </summary>
/// <param name="id">ID of the render queue group</param>
/// <returns>Returns an RenderQueueGroup</returns>
private RenderQueueGroup GetGroup(int id)
{
if (id > (int)RenderQueueGroupId.Count)
throw new ArgumentException("Invalid RenderQueueGroup id", "id");
if (_queueGroups[id] != null)
return _queueGroups[id];
RenderQueueGroup group = new RenderQueueGroup(id);
AddNewRenderGroup(group);
return group;
}