Hello everyone!

I am wrestling with a problem that I was wondering if anyone might have an answer to...

I am trying to write a formula for a ball bouncing in a room.

The values I feel necessary are...

Ball_X, Ball_Y, Ball_Z (current location of ball in 3Dimensional room.)
Screen_ball_X, Screen_ball_Y (actual location of ball on screen)

Assuming room is 20 ft high, 20 ft wide, and 40 feet long (or perhaps better to say 240 by 240 by 480 inches) how would I transpose this three dimensional model into a two dimensional visual representation on the screen.

I also recognize I need variables such as gravity, resistance (eg. ball rolling on floor), velocity and direction but right now I am just trying to figure out a simple formula for translating 3D ballX, BallY, and BallZ to 2D BallX and BallY.

Any thoughts would be greatly appreciated!

Thanks!