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  • Status: Solved
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OpenGL and MFC - Lclick coordinate

I have a 2-D grid on a window. When the user left clicks on
the space of the grid, I need to get the coordinate that was clicked in the OpenGL projection, not the pixel coordinates
of the window passed in Cpoint of the OnLButtonDown(UINT nFlags, CPoint point).

I need help finding those corrindates so that the user can create an object where he just clicked.
[Using Visual C++ 5.0]
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vinny5
Asked:
vinny5
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1 Solution
 
vinny5Author Commented:
Edited text of question
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vinny5Author Commented:
Edited text of question
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Tommy HuiEngineerCommented:
When displaying the grid, don't you keep track of the origin of the grid and the projection matrix? If so, then you can apply the projection matrix to the point after adjusting for the origin of the grid. This will give you the translated point.


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vinny5Author Commented:
Thanks, but I still dont exactly know how to apply the projection matrix to the point.  But I see what your saying, I have the superbible and I havent seen an example like this. If you havent noticed im a begginer of OpenGL, and MFC.

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