check pdmtl abstractions too.

they contain that and a lot more .

check gems.* patches

https://github.com/aalex/pdmtl

2013/12/6 tim vets <timvets@gmail.com>

[list-dotprod] from list-abs might come in handy

2013/12/6 Claude Heiland-Allen <claude@mathr.co.uk>

On 05/12/13 23:40, Joćo 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

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