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How can i use the camera which is horizontally orthographic and vertically
perspective projection?
I couldn't find such option in basic POV-ray.
So, I download the Megapov which has user_defined option.
But I cannot understand it.
I want to know if the user_defined camera can make the scene what i want, and if
yes, how can i do that with the option.
I'l so appreciate your advices.
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From: jan dvorak
Subject: Re: horizontally orthographic and vertically perspective projection
Date: 20 Oct 2008 04:31:45
Message: <48fc41f1$1@news.povray.org>
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pyromania napsal(a):
> How can i use the camera which is horizontally orthographic and vertically
> perspective projection?
> I couldn't find such option in basic POV-ray.
> So, I download the Megapov which has user_defined option.
> But I cannot understand it.
> I want to know if the user_defined camera can make the scene what i want, and if
> yes, how can i do that with the option.
> I'l so appreciate your advices.
>
>
hello,
the cylindric camera might look a bit like what you're looking for.
If this is not good enough (which probably isn't).
To define a camera type, you need to define two vectors for each pixel:
where to shoot the ray from (location) and which direction to shoot at
(direction).
You can define vector as a function of u and v. U runs from left to
right in the interval [0..1], V runs from bottom to top.
There are two ways to define these functions. In the first one you
define each vector component (x,y,z) independently.
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From: Alain
Subject: Re: horizontally orthographic and vertically perspective projection
Date: 21 Oct 2008 15:46:32
Message: <48fe3198$1@news.povray.org>
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pyromania nous illumina en ce 2008-10-19 20:47 -->
> How can i use the camera which is horizontally orthographic and vertically
> perspective projection?
> I couldn't find such option in basic POV-ray.
> So, I download the Megapov which has user_defined option.
> But I cannot understand it.
> I want to know if the user_defined camera can make the scene what i want, and if
> yes, how can i do that with the option.
> I'l so appreciate your advices.
>
>
The closest that I can think of is one of the cylindrical cameras.
Take a look at camera{cylinder 4, The_rest_of_your_camera_definition}
horizontal cylinder, viewpoint moves along the cylinder's axis
All rays are perpendicular to the axis of the camera like an orthographic
projection, but are spread around the axis, like in perspective.
--
Alain
-------------------------------------------------
A pat on the back is only a few centimeters from a kick in the butt.
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