POV-Ray: Newsgroups: povray.general: How to check if three points are in line?: Re: How to check if three points are in line?

POV-Ray : Newsgroups : povray.general : How to check if three points are in line? : Re: How to check if three points are in line?		Server Time 23 Apr 2024 07:37:32 EDT (-0400)

From: kurtz le pirate
Date: 6 Jun 2020 04:03:41
Message: <5edb4ddd$1@news.povray.org>

On 06/06/2020 05:12, Tor Olav Kristensen wrote:

> #declare vC = vcross(p2 - p1, p3 - p1);
> 
> 
> Now if vlength(vC) <= Nil, then the points are in line or almost in line.

Wholeheartedly agree.
If cross product of two vectors is null, the points are aligned.
Just be careful about 'null' value.

-- 
Kurtz le pirate
Compagnie de la Banquise

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