On 12/12/2009 12:58 PM, stbenge wrote:
> Hello,
>
> I'm developing a set of macros to load and manipulate 16-bit height
> field data. With them, you can import red/green 16-bit grayscale images
> and manipulate them as you would any other pigment. There are functions
> for finding edges (via a proximity pattern), finding angles for special
> effects, and even one for exporting red/green images to a few 24-bit
> image formats (to compensate for 3.7's rudimentary 16-bit support). They
> can be used to add features to existing height field data or to create
> new data. The pigments can be used in isosurfaces. I'm keeping my macros
> easy-to-use this time :)
>
> Unfortunately, there are limitations. For one, POV-Ray's handling of
> image_maps produces strange edge artifacts, so I'm having to bring the
> edges of the images down to zero. This creates a sharp drop-off at the
> perimeter of the height field. It's not a feature I wanted.
>
> Another problem is speed. A person would have to develop their height
> maps in a 2D fashion to avoid high parse times, but the macros *can* be
> used directly in a scene.
>
> Considering these limitations, does anyone think they might find such an
> include file useful? I'm pretty much done with most of the functions, so
> all I need is one response so I can begin making example files!
>
> ~Sam

See here:

http://wiki.povray.org/content/Knowledgebase:High_precision_heightfields


--
Michael Horvath
mik### [at] gmailcom
http://isometricland.com

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