I am a french student and I need to pass 3D coordinates into 2D screen coordinates, please help me.

# How can I transform 3D Coordinates into 2D screen coordinates

I am an italian student, and use gluProject (I assume you were asking for how to do it in OpenGL ).

- Get current viewing matrix, projection matrix, viewport dimension
- call gluProject passing x, y, z, and the matrices from point 1)
- read winx, winy, and winz(!)

The winz coord is used for clipping, I think (I couldnâ€™t remeber precisely).

You should be interested in winx and winy.

This is the process as described in the red-book. Have a glance.

[This message has been edited by paolom (edited 03-10-2000).]

this is a handy tutorial for your prob

http://www.velocity.net/~waz/glgamedev/view.cgi?V=tutorial_glfeedback&S=1