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Shader-based OpenGL is a powerful and exciting tool for individuals with data visualization needs, interests in gaming, a need to create and manipulate synthetic environments, and a variety of other high-performance tasks. It is well-known that shader-based OpenGL is difficult to learn for programmers with no prior graphics API experience -- some have even claimed it's impossible to teach to individuals without such prior exposure. In this paper, we report on our experiences developing an educational approach that we believe has contributed to the base of evidence that it is not only possible, but also desirable to do so. Our overriding goal has been to learn and exploit the extent to which mastering a complex graphics API like modern shader-based OpenGL can be enhanced by using a software design framework into which relevant concepts can be placed, thus facilitating more rapid assimilation and mastery of the concepts. We have been using this technique in our Introduction to Computer Graphics course in which we have two primary goals: teach shader-based OpenGL to students who have no prior experience using a graphics API, and present a framework to students that will scale up to medium and large scale applications, both in terms of code size as well as data size. We do not in any way suggest that our architecture is the 'best' for all advanced graphics applications, or even for teaching. Instead we simply claim that use of such a framework helps students master complex OpenGL concepts and develop nontrivial interactive 3D applications. Once students fully understand the basics, they should find it easy to migrate to other perhaps quite different architectures.

Using a software framework to enhance online teaching of shader-based OpenGL