guwinston

In the [`in_frustum`](https://github.com/graphdeco-inria/diff-gaussian-rasterization/blob/59f5f77e3ddbac3ed9db93ec2cfe99ed6c5d121d/cuda_rasterizer/auxiliary.h#L139) function, only `p_view.z` is used for culling. Why not use `p_hom` in the NDC space for culling? From the commented code, it seems that the clipping range...