Get the 2D location of an 3D object

Hi,
I have a chain of points, around 27 of them, i want to make a hittest with 3 different radius. What the way to convert the 3D location to a 2D point on the screen?
If I cannot get the 2d location I'm planning on doing it with raycast, but I'm sure it will cost more performance then a simple Pythagore dist.

Thanks in advance!

-romrome

Check for sio2Project & sio2UnProject, as they are behaving the same way as gluProject and gluUnProject... You can do 2D -> 3D _or_ 3D -> 2D coordinates conversion.

Check Tutorial14 as an example of using sio2Project() to get a point in 3D space converted in 2D space coordinates.

fast reply, i like it!