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26 Nov 2024 17:40:41 EST (-0500)
  reference focal_point (Message 1 to 2 of 2)  
From: crz
Subject: reference focal_point
Date: 11 Mar 2004 10:08:48
Message: <40508100$1@news.povray.org>
hi, want to use fiocal blur in an animation. But as dfar as i can tell I
tell the focal_point, by giving hard coordinates.
Is it possible to use references, so say if I have like 1000 *.pov files
(each one animation frame) and 1 external inc-file and then say that
focal_point  is object: sphere01

(thus  focal_point < sphere01>   instead of  focal_point < 1, 1, -6>


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From: Severi Salminen
Subject: Re: reference focal_point
Date: 11 Mar 2004 10:28:13
Message: <4050858d$1@news.povray.org>
crz wrote:

> hi, want to use fiocal blur in an animation. But as dfar as i can tell I
> tell the focal_point, by giving hard coordinates.
> Is it possible to use references, so say if I have like 1000 *.pov files
> (each one animation frame) and 1 external inc-file and then say that
> focal_point  is object: sphere01
> 
> (thus  focal_point < sphere01>   instead of  focal_point < 1, 1, -6>

You can do it like this, for example:

// "Subject" is the point, where the focus will be sharp
// and where the sphere is positioned. You can give it any
// name and move it during animation the way you want.

#declare Subject = <1,1,-6>;

camera{
...
focal_point Subject
}

sphere{Subject,10 pigment{...}}

So whenever the sphere moves (whenever you change the vector Subject) 
both the sphere and the focal_point move. You can also add "look_at 
Subject" to the camera definition and the camera will allways look at 
the sphere. Basically you create a variable that you use to control 
various things that are related.

BTW, you don't need to have 1000 .pov files to create a 1000 frame 
animation. You should read the docs and the animation tutorials 
carefully - or ask here if there is something you don't understand.

Severi


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