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I have a little LWJGL application and I have been trying to figure out how to successfully use the GLU.gluUnProject function in order to transform a given point on the screen (mouse position) to world coordinates. I found several examples on Google and really tried hard to get it to work. I do manage to get a result vector but the values it gives me make no sense.

I am programming on a LWJGL project and have been trying to figure out how to successfully use the GLU.gluUnProject function in order to transform a given point on the screen (mouse position) to world coordinates. I found several examples on Google and really tried hard to get it to work. I do manage to get a result vector but the values it gives me make no sense.

None of the three resulting coordinates makes sense to me. As far as I can tell x should be somewhere around 240 (each tile in the scene is of size 120 x 80 pixels). It should definately be positive though and not -0.0580 or -0.0208.

None of the three resulting coordinates makes sense to me. As far as I can tell x should be somewhere around 240 (each tile in the scene is of size 120 x 80 pixels). It should definitely be positive though and not -0.0580 or -0.0208.

screen capture http://img819.imageshack.us/img819/9452/as8k.jpg

I rewrote the code several times using different implementations of other people but could not get it to work. Maybe somebody could give me a hint. What I am doing wrong?

Thanks a lot for any advice or link of any kind! I really appreciate your help!

Greetings Xoric

I rewrote the code several times using different implementations of other people but could not get it to work. Maybe somebody could give me a hint. What I am doing wrong?