I am writing a simple code to zoom in on an image wherever the user clicks the left mouse-button
In my mouse-callback function, I am getting the window coordinates returned. The window size is (500,500). How do I convert the returned window coordinates into my world coordinates (gluOrtho2D)?
My initial world coordinates are set up as gluOrtho2D(-1.5,0.5,-1.25,1.25).
Is there an openGL call that will give me the world coordinates in the callback? Or should there be another approach?
Thanks in advance.