"Bald Eagle" <cre### [at] netscapenet> wrote:
> William F Pokorny <ano### [at] anonymousorg> wrote:
>
> > 1) I cannot find 'D = ray.Direction;' in my yuqk code? Where and in what
> > version of source code are you seeing this?
>
> Right because that line is not explicitly there.
> D is implicitly defined as the ray direction.
>
> Then in line 256 we do:    len = D.length();
>
> Which is why we need to get rid of the y component for reasons explained.
>
> So really what we need is an extra line that REdefines the _projected_ ray
> direction as D = <D.x, 0, D.y> before that length and normalization take place.
>
> - BW

https://news.povray.org/web.68e8688f251da1bc1f9dae3025979125%40news.povray.org

"2. The issue (*) above was a result of the ray direction being used as-is.
When I had an angled ray, the length was too large, and overly shortened my
perpendicular vector.
When I only used the ray projection onto the xz plane, all of my perpendicular
vectors were of the proper length."

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