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opengl — This part is responsible for the pseudo3D
rendering through OpenGl and gives methods to adapt the view.
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renderingMode — Controls the way OpenGL renders objects.
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light — Controls the use of lights in the rendering
window.
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text — Enables capabilities to write some text on rendering screen.
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objectList — Gives storage for ids used by OpenGL lists and
provides primitive routine for common drawing operations
(distances, torus...).
These little utilities are dealing with OpenGL. They are not essential to V_Sim but can add some nice features that can be shared between different modules.