Subject:
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Re: Is it possible to use LDView as POV-Ray previewer?
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Newsgroups:
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lugnet.cad.ray
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Date:
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Tue, 6 Dec 2005 17:46:00 GMT
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Viewed:
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7881 times
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In lugnet.cad.ray, Travis Cobbs wrote:
> In lugnet.cad.ray, Timothy Gould wrote:
> > You could orthogonalise the matrix before writing it out. It's relatively easy
> > to make a routine that will find a 'best' rotation matrix that is perpendicular
> > and very close to the original. That way you don't have to deal with the up,
> > right etc.
> >
> > I can write you a C routine to do so if you like, or send you some pseudo-code.
>
> Thanks for the offer. It sounds like I can make use of parameters that Lars has
> already implemented if I just change my outputs slightly, so I think I'll go
> that route. If you've already got the code or pseudo-code lying around, I'd
> like to take a look at it, though. I'm guessing it's more accurate than my
> arbitrary tweaking of my vectors to make them perpendicular.
>
> --Travis
None handy but all I'd do is sort first and then perpendicularise one and use
the cross-product for the third. Probably what you do anyway.
To be honest I don't see why POVray is being so pedantic about it. It's only
going to be accurate matter to about 1/2000 unless you raytrace massive images.
Tim
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Message has 1 Reply:
 | | Re: Is it possible to use LDView as POV-Ray previewer?
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| (...) I'm not sure what you mean by "sort first". However, I do what you say, and make the right and up perpendicular, then use the cross product to determine the direction. POV-Ray is only pedantic when the "vista buffer" is enabled (which is true (...) (19 years ago, 6-Dec-05, to lugnet.cad.ray)
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Message is in Reply To:
| | Re: Is it possible to use LDView as POV-Ray previewer?
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| (...) Thanks for the offer. It sounds like I can make use of parameters that Lars has already implemented if I just change my outputs slightly, so I think I'll go that route. If you've already got the code or pseudo-code lying around, I'd like to (...) (19 years ago, 6-Dec-05, to lugnet.cad.ray)
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