[fpc-pascal] Calculating Pixels to represent 3D coordinates

[James Richters]

I'm curious if Freepascal has any package available that would calculate X,Y screen pixels based on 3D  X,Y,Z  data at some given rotations.  I'm using Agg-Pas with PTC-Graph in a console application on Windows.   I'm not sure what the technical term is for figuring out what pixels are used to represent 3D coordinates on a 2D screen, but I'm hoping maybe there is something that just does the calculations that I can use in conjunction with Agg-Pas and PTC-Graph instead of moving to a complete graphics package.

James