CG Lecture 3, Thurs 20160901

Today will end at 5 because the President is holding a reception.

If you're interested, the Fall 2014 version of this course is here. This year is 90% the same.

Here is My local cache of Angel's web site . It may be faster to access.
(Several times, I've been glad to have a local cache of some web site, because the web site later vanished.)

Linear algebra tutorial

For students confused by the linear algebra questions on homework 1, the following may help:

Also see wikipedia.

Some older graphics texts have appendices summarizing the relevant linear algebra.

The scalar (dot) product is needed to do things like this:
 compute how a ball bounces off a wall in pong
 compute lighting effects (how light reflects from a surface)

The cross product's applications include:
 compute torque and angular momentum.
 compute the area of a parallelogram.
It is the only operator that you'll probably ever see that is not associative. Ax(BxC) != (AxB)xC.

The triple product (A.BxC) computes the volume of a parallelepiped.


We'll continue with the textbook powerpoint slides.