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Index › Programming Questions & Help › Syntax Questions › world and screen coordinates

aquilo YaBB Newbies Offline Posts: 6 Switzerland	world and screen coordinates Sep 30th, 2007, 3:40pm   Is there an way to get the "world" coordinates from screen coordinates? After many changes (translations, scalings, rotations) in the transformations matrix, I'd like to point with the mouse on a location on the screen. Instead of the screen coordinates I need to have world coordinates. Adi

fjen God Member Offline Posts: 965	Re: world and screen coordinates Reply #1 - Sep 30th, 2007, 3:46pm   have you tried screenX(), ..? http://processing.org/reference/screenX_.html F

aquilo YaBB Newbies Offline Posts: 6 Switzerland	Re: world and screen coordinates Reply #2 - Sep 30th, 2007, 3:57pm   I think I need the reverse of screenX. With mouseX a have the screen coordinate, but I don't know where this is in my world (which is projected on the screen).

JohnG Ex Member	Re: world and screen coordinates Reply #3 - Sep 30th, 2007, 4:39pm   If you're using OpenGL I wrote a function a while back that'll do what you want: http://processing.org/discourse/yabb_beta/YaBB.cgi?board=OpenGL;action=display;num=1176483247

aquilo YaBB Newbies Offline Posts: 6 Switzerland	Re: world and screen coordinates Reply #4 - Sep 30th, 2007, 5:33pm   Thank you John! I integrated the OpenGL and it works perfectly! I thought that this could be a silly question, but your answer shows me that the problem is not so trivial.