finding the 3D coordinates of a bitmap pixel

[Anonymous]

I've got a bitmap on a plane. This bitmap has pixels. I want to find specific pixels based on a filter that I have developed, and extract those pixels' 3d coordinates. I can't for the life of me figure out how to do this, or if it is at all possible.

Anyone have any ideas?

Thanks!

Tim Borrelli
Principal Technical Animator/Character Animator
Volition, Inc

[Anonymous]

I don't see the correct algorithm you want to use to find the coordinates.
Apart from that, what is your major goal? Maybe it can be achieved in another way.

[jeff]

Perhaps you could ignore the fact that there is a bitmap, and use the dimension of the bitmap to divide the plane (similar to percentage). Then the plane center and rotation, plus percent (pixel) offset, with some basic trigonometry, should give you the 3D coords. of the "pixel".

-Jeff

[PiXeL_MoNKeY]

You would need to convert the barycentric coordinates of the UV position to extract the World XYZ position. You may try searching the CGTalk 3ds max Maxscript section for barycentric coordinates to get some more info, for example what is posted here may help.