High!

geep999 wrote:

> That's interesting. I did experiment a bit with heightfields, but couldn't
> figure out how to wrap it onto a sphere.

What about defining an image_map pigment (preferably a "simple 
cylindrical map" with 2:1 edge ratio, otherwise you'll got ugly 
distortions toward the poles), probing the color value of each pixel 
with eval_pigment() and then calculate each vertex of the spherical 
mesh2 by this formula, with long being latitude (0 to 360) and lat being 
latitude (90 to -90):

[radius calculated from pixel's RGB values] * 
<sin(radians(-long))*cos(radians(lat)), sin(radians(lat)), 
cos(radians(-long))*cos(radians(lat))>

Note that long must be negative, otherwise you'll get a mirrored map!

See you in Khyberspace!

Yadgar

Post a reply to this message