## 4.2 POV-Ray SDL tutorial: A raytracer

You know you have been raytracing too long when ...
... You've been asked how you did that thing you did, by the author of the raytracer you used to do it.
-- Alex McLeod

In 'POV-Ray SDL tutorial: A raytracer' ...
4.2.1 | Introduction
4.2.2 | The idea and the code
4.2.3 | Short introduction to raytracing
4.2.4 | Global settings
4.2.5 | Scene definition
4.2.6 | Initializing the raytracer
4.2.7 | Ray-sphere intersection
4.2.8 | The Trace macro
4.2.9 | Calculating the image
4.2.10 | Creating the colored mesh
4.2.11 | The Camera-setup