Interacting with the 3D Display
Once polygons are defined, OpenGL performs a series of transformations to produce a scene. The details of projecting the 3D model onto a 2D screen are complex. We give here some sketchy descriptions of the process as necessary to describe some user accessible settings. For further information, the reader is referred to an OpenGL reference book.
The 3D rendering process is skipped if the 3D window is iconified.
On some systems, resizing the 3D window to a different aspect ratio results in distortion of the image that persists even if the image is redrawn and rescaled. Moritz must be terminated and restarted to remove the distortion. Because this problem does not occur on other systems, it is apparently caused by the particular implementation of OpenGL.
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