mpl_toolkits.mplot3d.proj3d.proj_transform_clip
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mpl_toolkits.mplot3d.proj3d.proj_transform_clip(xs, ys, zs, M)[source] - 
Transform the points by the projection matrix and return the clipping result returns txs,tys,tzs,tis
 
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    https://matplotlib.org/2.2.3/api/_as_gen/mpl_toolkits.mplot3d.proj3d.proj_transform_clip.html