Here in Ohio, the Meijer's (grocery/other stuff)have them going into the "overlord booth", I mean, uh, office... (WHY do they stick them to the underside of the roof? -- it's terribly eery) I don't think I've ever seen the tubes used tho...
There is a feedback method under OpenGL... For picking object you render your image (passing in named objects) and as they intersect your mouse position, you get back a list (depth sorted) of things your mouse "hit". That being said, it's quite slow (fine for an editor, bad for a game).
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Here in Ohio, the Meijer's (grocery/other stuff)have them going into the "overlord booth", I mean, uh, office... (WHY do they stick them to the underside of the roof? -- it's terribly eery) I don't think I've ever seen the tubes used tho...
There is a feedback method under OpenGL... For picking object you render your image (passing in named objects) and as they intersect your mouse position, you get back a list (depth sorted) of things your mouse "hit". That being said, it's quite slow (fine for an editor, bad for a game).