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//Here is a quick-n-cheap demo of my proximity pattern...
//*******************************************
#include "colors.inc"
#version unofficial MegaPov 0.4;
//-------------------------------------------
camera {
location < 2, 8,-20>
look_at < 0, 0, 0>
angle 35//30
}
//*******************************************
#declare Prox =
difference {
sphere {< 0, 0, 0>, 5}
cylinder {< 0, 0,-5.1>, < 0, 0, 5.1>, 2.5}
box {< 0, 0,-5.1>, < 5.1, 5.1, 5.1>}
texture {
pigment {color White*0.35}
finish {brilliance 2}
}
}
object {Prox}
sphere {< 0, 0, 0>, 7.5 hollow
texture {
pigment {color White filter 1}
}
interior {
media {
emission color Green*0.5
intervals 1 samples 15, 15
confidence 0.99 variance 1/128
method 3
density {
proximity {Prox, 1
samples 40
max_density 1
type 1//minimum distance
// method 0//point in BBox
method 1//Always use random direction.
//Slower, but pretty fast because all
//points are prety close to Prox
sides 1//Outside only
}
color_map {
[0 color Black]
//Since only the outside is being calculated, all points
//inside the object are set to 0.
//We want the color to range from 1 at the surface(distance 0)
//to 0 as the distance increases, and the inside to be 0. That
//is the reason for this short entry at the beginning of the
//color_map.
[0.01 color White]
[1 color Black]
}
}
}
}
}
//*******************************************
light_source { < -30, 55, -40>*100 color White*0.8}
light_source { < 10, 15, -30>*100 color White*0.4}
//-------------------------------------------
--
Chris Huff
e-mail: chr### [at] yahoo com
Web page: http://chrishuff.dhs.org/
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