POV-Ray: Newsgroups: povray.advanced-users: How does one test to see if a triangle's verticies are arranged in a clockwise or counter clockwise direction?: Re: How does one test to see if a triangle's verticies are arranged in a clockwise or counter clockwise direction?

POV-Ray : Newsgroups : povray.advanced-users : How does one test to see if a triangle's verticies are arranged in a clockwise or counter clockwise direction? : Re: How does one test to see if a triangle's verticies are arranged in a clockwise or counter clockwise direction?		Server Time 29 Jul 2024 16:29:53 EDT (-0400)

From: Jim Kress
Date: 29 Jun 2002 23:34:05
Message: <3d1e7c2d$1@news.povray.org>

> that comes to mind is: Shoot a ray from the surface of the triangle to one
> side of it (it doesn't really matter which direction), and if hits an even
> amount of other triangles (also 0 is even), that side is is outside, else
> it's inside.

Got any suggestions how I would do this?  I've looked through the Internet
and have not been able to find an algorithum (or code) that would show me
how this is done.

Thanks.

Jim

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