[Sidefx-houdini-list] VEX Surface SHOP Type : Pz

Mark Alexander malexander at sidefx.com
Wed Nov 14 17:35:16 EST 2007


> What is exactly Pz ?

Pz is the distance from the camera plane to the plane that the shaded 
point is on (parallel to the camera plane; the camera plane is 
perpendicular to the camera viewing direction and passes through the 
camera position). It is *not* the 3D distance from the camera to the 
point shaded.

If you want the 3D distance, use P instead (a point). Take the length of 
that vector and you've got the proper 3D distance (this can be done in 
VOPs or COPs).

Cheers,
M.



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