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Topic: curveVertex syntax question (newbie) (Read 190 times) |
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katya
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curveVertex syntax question (newbie)
« on: Feb 10th, 2004, 6:22pm » |
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Hi-
I'm new to processing and most programming. Right now I'm practicing by finding already written code and trying to draw out on paper what I think the code will do to check my understanding. I'm getting confused with beginShape (LINE_STRIP); however. Why are 2 coordinates written twice when it seems to be referring to the same point? I try to eliminate different points but then clearly it doesn't work.
help
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skloopy
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Re: curveVertex syntax question (newbie)
« Reply #1 on: Feb 10th, 2004, 7:46pm » |
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I'm not an expert or anything, but I think that it's the nature of how catmull-rom splines (the ones used in curveVertex) are calculated.
The invisible points on the ends are like the tangents in beziers. They control the shape of the curve, but aren't visible. (i think)
I found this applet that helped me understand what was going on.
http://www.cse.unsw.edu.au/~lambert/splines/CatmullRom.html
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katya
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Re: curveVertex syntax question (newbie)
« Reply #2 on: Feb 10th, 2004, 11:32pm » |
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thanks!
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