[Plib-users] Window (x,y) to world coordinates

[Ask F. J. <ask...@ya...>]

Hello all,

I have a PLIB application in which my camera is facing down along the Z axis to
look at a grid on the XY plane.  I can move the camera up and down along the Z
axis to effectively 'zoom' my view of the plane.  I can also move the camera
along the XY axis, but in all cases I am looking down square upon the XY axis .

What I am looking for is a way to translate window coordinates obtained from the
mouse to world coordinates, taking into account the window dimensions and
current camera position.  Is there an easy formula or matrix operation in PLIB
that will allow me to do this?  I tried playing around with the ortho matrix,
but my experimentation didn't get me very far.

BTW, PLIB is wonderful.  Its very gradual learning curve and intutitive
interface is the main reason why I switched back from Direct3D to OpenGL for my
application.

Thanks for your help,
Aaron [ask...@ya...]



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