POV-Ray : Newsgroups : povray.newusers : Compute camera position Server Time: 17 Jun 2019 06:37:21 GMT
  Compute camera position (Message 1 to 3 of 3)  
From: kurtz le pirate
Subject: Compute camera position
Date: 10 Jul 2016 15:14:46
Message: <57826666$1@news.povray.org>
Hello,

I have datas to plot in <y,z> plane from 0..max(MaxY,MaxZ).
Image ratio is 1:1.

To see full image, camera position is <???, max/2, max/2>
and look at <0, max/2, max/2> ok.

But how to compute the x part of camera location ?



thanks

-- 
Kurtz le pirate
Compagnie de la Banquise


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From: kurtz le pirate
Subject: Re: Compute camera position
Date: 10 Jul 2016 15:51:05
Message: <57826ee9$1@news.povray.org>
Le 10/07/2016 à 17:14, kurtz le pirate a écrit :
>
> Hello,
>
> I have datas to plot in <y,z> plane from 0..max(MaxY,MaxZ).
> Image ratio is 1:1.
>
> To see full image, camera position is <???, max/2, max/2>
> and look at <0, max/2, max/2> ok.
>
> But how to compute the x part of camera location ?


Found :
	ceil((max*0.50)/tan(radians(cameraAngle*0.50)))




-- 
Kurtz le pirate
Compagnie de la Banquise


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From: William F Pokorny
Subject: Re: Compute camera position
Date: 10 Jul 2016 16:02:01
Message: <57827179$1@news.povray.org>
On 07/10/2016 11:14 AM, kurtz le pirate wrote:
>
> Hello,
>
> I have datas to plot in <y,z> plane from 0..max(MaxY,MaxZ).
> Image ratio is 1:1.
>
> To see full image, camera position is <???, max/2, max/2>
> and look at <0, max/2, max/2> ok.
>
> But how to compute the x part of camera location ?
>

You could, I think, use the orthographic camera without the angle 
keyword. Just some offset +-x, a direction vector toward your "data"
and in your case, symmetric adjustment of the up and right vector 
magnitudes to encompass your data if need be.

Bill P.


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