Lessons 21 - 25

	Lines, Antialiasing, Timing, Ortho View And Simple Sounds This is my first large tutorial. In this tutorial you will learn about: Lines, Anti-Aliasing, Orthographic Projection, Timing, Basic Sound Effects, and Simple Game Logic. Hopefully there's enough in this tutorial to keep everyone happy :) I spent 2 days coding this tutorial, and about 2 weeks writing this HTML file. If you've ever played Amidar, the game you write in this tutorial may bring back memories. You have to fill in a grid while avoiding nasty enemies. A special item appears from time to time to help make life easier. Learn lots and have fun doing it!
	Bump-Mapping, Multi-Texturing & Extensions This tutorial code was written by Jens Schneider. Right off the start I'd like to point out that this is an advanced tutorial. If you're still uncertain about the basics, please go back and read the previous lessons. If you're a new GL programmer, this lesson may be a bit much. In this lesson, you will modify the code from lesson 6 to support hardware multi-texturing on cards that support it, along with a really cool visual effect called bump-mapping. Please let Jens Schneider know what you think of the tutorial, it's always nice when visitors contribute to the site, it benefits us all. Everyone that has contributed a tutorial or project deserves credit, please let them know their work is appreciated!
	Sphere Mapping Quadrics In OpenGL This tutorial code was written by GB Schmick and is based on his quadrics tutorial (lesson 18). In lesson 15 (texture mapped fonts) I talked a little bit about sphere mapping. I explained how to auto-generate texture coordinates, and how to set up sphere mapping, but because lesson 15 was fairly simple I decided to keep the tutorial simple, leaving out alot of details in regards to sphere mapping. Now that the lessons are a little more advanced it's time to dive into the world of sphere mapping. TipTup did an excellent job on the tutorial, so if you appreciate his work, let him know!
	Tokens, Extensions, Scissor Testing And TGA Loading In this tutorial I will teach you how to read and parse what OpenGL extensions are supported by your video card. I will also show you how to use scissor testing to create a cool scrolling window effect. And most importantly I will show you how to load and use TGA (targa) image files as textures in projects of your own. TGA files support the alpha channel, allowing you to create some great blending effects, and they are easy to create and work with. Not only that, by using TGA files, we no longer depend on the glAUX library. Something I'm sure alot of you guys will appreciate!
	Morphing & Loading Objects From A File This tutorial code was written by Piotr Cieslak. Learn how to load simple objects from a text file, and morph smoothly from one object into another. The effect in this tutorial has to be seen to be appreciated. The effect taught in this demo can be used to animated objects similar to the swimming dolphin in my Dolphin demo, or to twist and bend objects into many different shapes. You can also modify the code to use lines or solid polygons. Great effect! Hope you appreciate Piotr's work!