check pdmtl abstractions too. they contain that and a lot more . check gems.* patches
https://github.com/aalex/pdmtl 2013/12/6 tim vets <[email protected]> > [list-dotprod] from list-abs might come in handy > > > 2013/12/6 Claude Heiland-Allen <[email protected]> > >> On 05/12/13 23:40, João Pais wrote: >> >>> Hello list, >>> >>> I had a doubt, will try to explain. >>> >>> I wanted to define a line in a 3d space through 2 points, and be able to >>> find out the distance from another point to that line. Since I'm very >>> bad at math, I wanted to know if anyone has done something similar, or >>> knows how to get to it. >>> >> >> http://paulbourke.net/geometry/pointlineplane/ >> >> first example on the page, you just need to clamp u to [0..1] if you want >> to make it work for a line segment instead of an infinite line. >> >> >> Claude >> >> >> As I see it, the process goes this way: >>> - define a line from coordinates x1,y1,z1 to x2,y2,z2 >>> - declare the point x3,y3,z3 >>> - find the distance from that point to the nearest point belonging to >>> the said line >>> >>> >>> Any existing examples with gem rendering would be great. >>> >>> Thanks as usual, >>> >>> jmmmp >>> >> >> -- >> http://mathr.co.uk >> >> >> >> _______________________________________________ >> [email protected] mailing list >> UNSUBSCRIBE and account-management -> http://lists.puredata.info/ >> listinfo/pd-list >> > > > _______________________________________________ > [email protected] mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list > >
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