teaching machines

CS 455 Lecture 8 – Generating normals, depth testing, and aspect ratios

February 14, 2013 by Chris Johnson. Filed under cs455, lectures, spring 2013.

Before class

Generating Normals

• Watch http://youtu.be/pVt2RUjjgVE.
• For another perspective, read http://www.emeyex.com/site/tuts/VertexNormals.pdf.

Depth testing and aspect ratios

• Watch http://youtu.be/lQKjWjKGAc0.
• Read more about hidden surface removal solutions at http://www.cs.sun.ac.za/~lvzijl/courses/rw778/grafika/OpenGLtuts/Big/graphicsnotes009.html. Relish in the z-buffer’s simplicity.

In class

• First, get depth testing and aspect ratio handling in your previous renderer.
• Next, use W455/sphere.obj to create a satellite/moon orbiting around a planet.