CG Lecture 3, Thurs 2016-09-01
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Today will end at 5 because the President is holding a reception.
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If you're interested, the Fall 2014 version of this course is here. This year is 90% the same.
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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.)
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Linear algebra tutorial
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For students confused by the linear algebra questions on homework 1, the following may help:
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Also see wikipedia.
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Some older graphics texts have appendices summarizing the relevant linear algebra.
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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)
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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.
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The triple product (A.BxC) computes the volume of a parallelepiped.
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We'll continue with the textbook powerpoint slides.