Thanks Warp.


"Warp" <war### [at] tagpovrayorg> wrote in message 
news:424b122d@news.povray.org...
> Alf Peake <alf### [at] peake42freeservecouk> wrote:
>> For this aspect ratio I would also suggest adding this inside your
>> camera{} block:  right x*image_width/image_height
>
>  That should be used with care.
>
>  Automatic aspect ratio adjustment can change the viewing area in
> unexpected ways when the resolution is changed (well, more precisely
> the aspect ratio of the rendered image is changed). Inadverted changes
> in the viewing area can cause unwanted results if parts of the scene
> which should not appear in the image suddenly come into view or if
> important parts of the scene suddenly go out of view.
>
>  Also the combination of that command with other camera parameters
> can cause unexpected results. For instance, if 'angle' is used in
> addition to that 'right', the automatic aspect ratio correction will
> behave differently ('angle' fixes the horizontal viewing area and
> it will no longer be affected by 'right', which will start affecting
> the *vertical* viewing area).
>
>  Also, that form of the automatic aspect ratio correction works only
> if you really want *square* pixels. While that is usually the case,
> it's not universal. There are some applications where anamorphic
> images (non-square pixels) are needed.
>
> -- 
> #macro M(A,N,D,L)plane{-z,-9pigment{mandel L*9translate N color_map{[0rgb 
> x]
> [1rgb 9]}scale<D,D*3D>*1e3}rotate y*A*8}#end M(-3<1.206434.28623>70,7)M(
> -1<.7438.1795>1,20)M(1<.77595.13699>30,20)M(3<.75923.07145>80,99)// - 
> Warp -

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