Here's a start:
http://www.blitzbasic.com/codearcs/codearcs.php?code=676
Do the reverse, and once you know the FoV it's pretty simple to calculate the rect points once you know the distance and the field of view in degrees. It's morning here and I'm having only my second cup of coffee so it's best to leave the actual math to somebody who's fully awake :)
http://www.blitzbasic.com/codearcs/codearcs.php?code=676
Do the reverse, and once you know the FoV it's pretty simple to calculate the rect points once you know the distance and the field of view in degrees. It's morning here and I'm having only my second cup of coffee so it's best to leave the actual math to somebody who's fully awake :)