Tập Lái
20/12/14
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green-line well Ican express that as the some other vertical movement and horizontalmovement so that's great that works really wellusing vectors am I can go the other way to I can dothe horizontal movement and the vertical movement works great so what if I try this with rotation wellit turns out it doesn't work that well so let's say take my teapot rotatedaround the handle then rotated around the spout wellhere's where I ended up let's try again take my teapot rotatedaround the spout then around the handle well ended upsomewhere completely different so rotation inherently is messy itdoesn't work as well as linear movement Tom so what are we gonna do are we screwed fromthere's a couple ways of expressing rotation that work pretty well so we'll talk about those this one'sreally cheating but I like it let's forget about rotation and justtalk


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