Wasn't it Francois Labreque who wrote:
>Is there a way for a .pov to know at what size it's being rendered?
>
>I'm currently constantly switching from 320*240 to 600*600 to 1200*1500
>for a project I'm working on and I keep forgetting to change my up and
>right vectors...
>
>Someone help me being lazy.
You can do it in MegaPOV, but not (yet) in official PovRAY. The doc says
9.8. Image size keywords
Author: Smellenbergh
Two new keywords have been added so that the image size given in the
rendering options can be used in your scene source
image_width //reads the +Wn value
image_height //reads the +Hn value
When using those keywords to set the camera ratio (up and right
vectors) the viewing angle of the camera will always cover the full
width of the rendered image. No matter which image sizes are used, the
image will always show the right proportions. Use it like this:
up y*image_height
right x*image_width
--
Mike Williams
Gentleman of Leisure
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