POV-Ray : Newsgroups : povray.general : Raytracing page[s] Server Time: 19 Oct 2017 10:53:28 GMT
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From: Stephen
Subject: Re: Raytracing page[s]
Date: 19 Jul 2017 15:04:57
Message: <596f7519$1@news.povray.org>
On 7/19/2017 1:01 PM, Bald Eagle wrote:
> "Kenneth" <kdw### [at] gmailcom> wrote:
>
>> Thanks for posting this link. I need as many sources as I can find, to help me
>> further understand how a matrix works, and its many uses.
>
> Well, I'm sure there are many different types of matrix - and the graphics /
> camera / projection matrix is a special application.
>
>> For example, the real magic of Rune's ILLUSION.INC include file lies in
>> his use of a matrix, with amazing results. I'm still trying to understand what
>> he did!)
>
> Just by taking a quick look at the code, (I've never used it, and the sample
> file output makes no sense to me) I'd have to say that it just takes a "flat"
> image and skews it - stretches it - so that it fits / lines up correctly with
> the field of view from the camera position - a perspective correction.
>

I've used it and would say it more translates the rays than skews them.


> This is also something I need to look into, and have only briefly played with it
> to correct some perspective distortion of photographed flat surfaces.
>
> I'm sure it could be harnessed to do some basic photogrammetry, if I ever live
> that long, have enough round tuits, and triple my caffeine intake.  ;)
>
> Glad you can use the link - it looked like a good one.   Lohmueller of course
> has some examples on his page[s] as well, and many examples are available via
> the insert menu.
>
>

You might be interested in Dr. John's FieldCam macro.

>
> Greetings, all. I have a macro that simulates a shifted lens which may
> help you. I will repost it in p.b.s-f. as FieldCam.zip. In the zip are
> three folders; one for Mac users, one for Unix users and one for M$
> users. Hope it helps

http://news.povray.org/povray.binaries.scene-files/thread/%3C48400449$1@news.povray.org%3E/?ttop=328092&toff=50



-- 

Regards
     Stephen


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From: B  Gimeno
Subject: Re: Raytracing page[s]
Date: 21 Jul 2017 16:00:01
Message: <web.5972245ab085b44be2d509f80@news.povray.org>
"Bald Eagle" <cre### [at] netscapenet> wrote:
> Just came across this as a link from a google image search.
> http://www.aleph.se/Nada/ray.html
> and as usual thought I'd share.
>
> It would make a fun (and probably quite extensive) thread to post the results of
> searching even only the terms:
> XYZ's Raytracing Page
>
> Let alone the variants of that and "rendered with POV-Ray", etc.
> :)
http://www.dimensions-math.org/
http://www.chaos-math.org/es
http://www.josleys.com/
http://www.bugman123.com/

Regards, B. Gimeno


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From: MichaelJF
Subject: Re: Raytracing page[s]
Date: 21 Jul 2017 18:45:00
Message: <web.59724af4b085b44b23142f410@news.povray.org>
Thank you all for new interesting POV-Links, But don't expect to much from the
sources given. E.g. "codeworx" (posted by Norbert) has deleted essential
parameters in his given code, which can be guest in some cases but not in all.
For older links, yielding a 404-Error (especially sites from geocities) try the
wayback-machine archive.org, many of them are still stored there.

Sorry for the short notice, but I'm running for the German parliament until the
September election. I and my party have no chance to win, but we will use it ;)

Best regards,
Michael


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From: Stephen
Subject: Re: Raytracing page[s]
Date: 22 Jul 2017 09:05:34
Message: <5973155e$1@news.povray.org>
On 7/21/2017 7:41 PM, MichaelJF wrote:
> Sorry for the short notice, but I'm running for the German parliament until the
> September election.

Good luck with it.

> I and my party have no chance to win, but we will use it;)

My sort of politician. ;)

-- 

Regards
     Stephen


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From: clipka
Subject: Re: Raytracing page[s]
Date: 22 Jul 2017 10:10:07
Message: <5973247f$1@news.povray.org>
Am 22.07.2017 um 11:05 schrieb Stephen:
> On 7/21/2017 7:41 PM, MichaelJF wrote:
>> Sorry for the short notice, but I'm running for the German parliament
>> until the
>> September election.
> 
> Good luck with it.
> 
>> I and my party have no chance to win, but we will use it;)
> 
> My sort of politician. ;)

Unfortunately I can't vote for him -- different voting district, if I'm
not mistaken.


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From: MichaelJF
Subject: Re: Raytracing page[s]
Date: 23 Jul 2017 19:50:01
Message: <web.5974fdcbb085b44ba9c263eb0@news.povray.org>
clipka <ano### [at] anonymousorg> wrote:
> Am 22.07.2017 um 11:05 schrieb Stephen:
> > On 7/21/2017 7:41 PM, MichaelJF wrote:
> >> Sorry for the short notice, but I'm running for the German parliament
> >> until the
> >> September election.
> >
> > Good luck with it.
> >
> >> I and my party have no chance to win, but we will use it;)
> >
> > My sort of politician. ;)
>
> Unfortunately I can't vote for him -- different voting district, if I'm
> not mistaken.

Many thanks, but unfortunately you're right. As usual...
Best regards,
Michael


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From: Bald Eagle
Subject: Re: Raytracing page[s]
Date: 15 Aug 2017 19:15:00
Message: <web.599347c9b085b44bc437ac910@news.povray.org>
http://www.hib-wien.at/leute/wurban/informatik/POV/supershapes/Spherical4.html

Ari may be especially interested in this one:
http://www.hib-wien.at/leute/wurban/informatik/osculating/index.html

http://www.hib-wien.at/leute/wurban/informatik/apollonius/index.html


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From: Bald Eagle
Subject: Re: Raytracing page[s]
Date: 18 Aug 2017 14:20:01
Message: <web.5996f68cb085b44bc437ac910@news.povray.org>
"Fracplanet is an interactive tool for creating random fractal planets and
terrain areas with oceans, rivers, lakes and icecaps. The results can be
exported as models to POV-Ray and to Blender, or as texture maps for more
general usage. The code is licensed under the GPL. It uses Qt and OpenGL."


http://orbittrap.ca/?m=201302
https://sourceforge.net/projects/fracplanet/


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From: Bald Eagle
Subject: Re: Raytracing page[s]
Date: 18 Aug 2017 14:20:01
Message: <web.5996f75ab085b44bc437ac910@news.povray.org>
https://groimp.wordpress.com/groimp/

"GroIMP (Growth Grammar-related Interactive Modelling Platform) is a
3D-modelling platform. GroIMP contains modeling features such as:

Interactive editing of scenes
Rich set of 3D objects, including primitives, NURBS curves and surfaces, and
height fields
Material options like colors, and textures
Real-time rendering using OpenGL
Export to POV-Ray, a free ray-tracer
....."


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From: Bald Eagle
Subject: Re: Raytracing page[s]
Date: 29 Aug 2017 16:45:00
Message: <web.59a598e2b085b44bc437ac910@news.povray.org>
This seems to have some interesting scenes and animations with pov source and
ini files.

http://phys23p.sl.psu.edu/phys_anim/povray/


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