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|
//
// diffusion.pov
//
// (c) 2021 Prof Dr Andreas Müller, OST Ostscheizer Fachhochschule
//
#version 3.7;
#include "colors.inc"
global_settings {
assumed_gamma 1
}
#declare imagescale = 0.034;
#declare N = 100;
#declare r = 0.43;
#declare R = 1;
camera {
location <43, 25, -20>
look_at <0, -0.01, 0>
right 16/9 * x * imagescale
up y * imagescale
}
light_source {
<10, 20, -40> color White
area_light <1,0,0> <0,0,1>, 10, 10
adaptive 1
jitter
}
sky_sphere {
pigment {
color rgb<1,1,1>
}
}
#macro rotiere(phi, vv)
< cos(phi) * vv.x - sin(phi) * vv.z, vv.y, sin(phi) * vv.x + cos(phi) * vv.z >
#end
#macro punkt(phi,theta)
rotiere(phi, < R + r * cos(theta), r * sin(theta), 0 >)
#end
mesh {
#declare phistep = 2 * pi / N;
#declare thetastep = 2 * 2 * pi / N;
#declare phi = 0;
#while (phi < 2 * pi - phistep/2)
#declare theta = 0;
#while (theta < 2 * pi - thetastep/2)
triangle {
punkt(phi , theta ),
punkt(phi + phistep, theta ),
punkt(phi + phistep, theta + thetastep)
}
triangle {
punkt(phi , theta ),
punkt(phi + phistep, theta + thetastep),
punkt(phi , theta + thetastep)
}
#declare theta = theta + thetastep;
#end
#declare phi = phi + phistep;
#end
pigment {
color Gray
}
finish {
specular 0.9
metallic
}
}
#declare thetastart = -0.2;
#declare thetaend = 1.2;
#declare phistart = 5;
#declare phiend = 6;
union {
#declare thetastep = 0.2;
#declare theta = thetastart;
#while (theta < thetaend + thetastep/2)
#declare phistep = (phiend-phistart)/N;
#declare phi = phistart;
#while (phi < phiend - phistep/2)
sphere { punkt(phi,theta), 0.01 }
cylinder {
punkt(phi,theta),
punkt(phi+phistep,theta),
0.01
}
#declare phi = phi + phistep;
#end
sphere { punkt(phi,theta), 0.01 }
#declare theta = theta + thetastep;
#end
pigment {
color Red
}
finish {
specular 0.9
metallic
}
}
union {
#declare phistep = 0.2;
#declare phi = phistart;
#while (phi < phiend + phistep/2)
#declare thetastep = (thetaend-thetastart)/N;
#declare theta = thetastart;
#while (theta < thetaend - thetastep/2)
sphere { punkt(phi,theta), 0.01 }
cylinder {
punkt(phi,theta),
punkt(phi,theta+thetastep),
0.01
}
#declare theta = theta + thetastep;
#end
sphere { punkt(phi,theta), 0.01 }
#declare phi = phi + phistep;
#end
pigment {
color Blue
}
finish {
specular 0.9
metallic
}
}
#macro punkt2(a,b)
punkt(5.6+a*sqrt(3)/2-b/2,0.2+a/2 + b*sqrt(3)/2)
#end
#declare darkgreen = rgb<0,0.6,0>;
#declare astart = 0;
#declare aend = 1;
#declare bstart = -0.2;
#declare bend = 1.2;
union {
#declare a = astart;
#declare astep = 0.2;
#while (a < aend + astep/2)
#declare b = bstart;
#declare bstep = (bend - bstart)/N;
#while (b < bend - bstep/2)
sphere { punkt2(a,b), 0.01 }
cylinder { punkt2(a,b), punkt2(a,b+bstep), 0.01 }
#declare b = b + bstep;
#end
sphere { punkt2(a,b), 0.01 }
#declare a = a + astep;
#end
pigment {
color darkgreen
}
finish {
specular 0.9
metallic
}
}
union {
#declare b = bstart;
#declare bstep = 0.2;
#while (b < bend + bstep/2)
#declare a = astart;
#declare astep = (aend - astart)/N;
#while (a < aend - astep/2)
sphere { punkt2(a,b), 0.01 }
cylinder { punkt2(a,b), punkt2(a+astep,b), 0.01 }
#declare a = a + astep;
#end
sphere { punkt2(a,b), 0.01 }
#declare b = b + bstep;
#end
pigment {
color Orange
}
finish {
specular 0.9
metallic
}
}
|
