How to select objects in 3D?

OpenGL OpenGL: Basic Coding
1

Hi.
I was quiet enthusiastically reading the chapter of redbook on selection, hoping to find a solution to my object picking problem for my project. To my disappointment, it didn’t give a method to distinguish between objects at different depths, but which lie at the same cursor position. So once again, seeking the help of real opengl people over here. I simply want to select that object which lies at the frontmost. I have enabled depth buffering.

Thanks.

2

Look at the pickdepth.c example in the RedBook? Try running it and notice how the closer square (name 1) has the lower depth value (0.333333). The lower the depth … the closer it is.

3

OOps! I think i was in a hurry to read the chapter!
Thanks.