Selection(?)

Tokage · May 25, 2003, 10:09am

Is there a way to find the relationship between screen coordinates and world coordinates without doing complex time-consuming trig? And if “selection” isn’t this, what is it?

Leyder_Dylan · May 25, 2003, 10:58am

Simply, you click and you select an object.

Tokage · May 25, 2003, 1:10pm

I mean how do you do it in code…

shinpaughp · May 25, 2003, 2:31pm

Look here http://www.opengl.org/developers/faqs/technical/selection.htm

Tokage · May 25, 2003, 3:08pm

Heh, do you have anything a little more idiot-friendly? There are topics in there that I don’t think I’ve learned about yet. Should I just forget about it then?

shinpaughp · May 25, 2003, 3:22pm

Try http://nehe.gamedev.net - they have a picking tutorial… not sure of the tut number. Also, http://www.gametutorials.com/Tutorials/opengl/OpenGL_Pg3.htm under Object Selection

[This message has been edited by shinpaughp (edited 05-25-2003).]

jmikhael · May 27, 2003, 10:59am

If you just want to transform screen coordinates to world coordinates and vise versa, you should look into gluProject and gluUnproject.