We can easily write complex graphics routines which involve many changes to OpenGL states, off-screen buffers and complex shaders. One of the biggest problems with programming OpenGL is that if we get something wrong we can get weird results or just a blank screen. In this article we'll look at some approaches to debugging OpenGL code and GLSL shaders.

Introduction to Geometry for Computer Graphics

Geometry is a large and exciting topic. In this article we're going to look at some of the basic geometric constructs we commonly use in computer graphics, with an emphasis on those for real-time graphics and games. We'll look at points, lines, 2D and 3D shapes, as well as classifying transformations.