Simon Lemieux <Rei### [at] sympaticoca> wrote:
>>   I know functions and isosurfaces, but I don't know what are isofunctions.

> Hehe, pardon, my newbieness or shall I say my
> too-long-since-my-last-ray-traceness...  I did mix these two up, I was
> talking about isosurfaces which seems to be the kind of abstract
> mathematical objects made for me!

  An isosurface is an equipotential surface, that is, it consists of all
the points in space where the value of the given function is a given constant
(usually, but not necessarily, 0).

  A similar entity is an isobar. Isobars are 2D lines in a geographic map.
The line consists of all the points where air pressure is the same (a given
constant value).

-- 
#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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