POV-Ray : Newsgroups : povray.binaries.images : Bug trace clarifications... : Re: Bug trace clarifications... Server Time
13 Aug 2024 03:23:52 EDT (-0400)
  Re: Bug trace clarifications...  
From: Rune
Date: 11 May 2003 02:33:10
Message: <3ebdeea6$1@news.povray.org>
Christopher James Huff wrote:
> That's all I'm saying about it, if you read the
> documentation you will figure it out.

"It traces a ray beginning at the point A in the direction specified by
the vector B."

If B was a point vector, and the direction was that from A to B, then
wouldn't you *indirectly* be specifying the direction by the vector B?
Maybe not, but it's easy to get confused. Is it really impossible to be
just a bit more understanding? it's not like he's the first to get
confused by it, so that might indicate that it's easy to get confused by
indeed.

Anyway Xilo, B is a direction, so if you want the ray to go downwards,
you should simply specify <0,-1,0> (or -y) regardless of what the
StartRay point is.

Rune
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