Subject:
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Re: Ribbed hoses synth
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Newsgroups:
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lugnet.cad, lugnet.cad.dev
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Date:
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Fri, 24 Dec 2004 01:35:33 GMT
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Viewed:
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1330 times
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In lugnet.cad, Don Heyse wrote:
>
> Hey I know a spiffy little recursive algorithm that'd probably do
> a nice job of that. I used to use it in 2D to reduce the size of
> vectorized scanned image files, but it should extend nicely to 3D.
>
> You start with the end points of a curve. Then you find the farthest
> point on the curve from the straight line between the ends. Split
> the line at that point if the distance is greater than your angular
> tolerance. Recursively apply this to the two new segments.
>
> The distance is just the cross product divided by the length of the
> line segment between the end points (the area of a parallelegram
> divided by the base).
>
> If you want to get fancy, you can check for a negative dot product,
> which tells you a split point is past one of the ends of the line
> segment. Then you can use the radial distance instead of the
> perpendicular distance.
Thanks, but I have a simple iterative solution that works well.
Kevin
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Message is in Reply To:
 | | Re: Ribbed hoses synth
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| (...) Hey I know a spiffy little recursive algorithm that'd probably do a nice job of that. I used to use it in 2D to reduce the size of vectorized scanned image files, but it should extend nicely to 3D. You start with the end points of a curve. (...) (20 years ago, 19-Dec-04, to lugnet.cad, lugnet.cad.dev)
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