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//
// membran.pov
//
// (c) 2022 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
//
#version 3.7;
#include "colors.inc"
#include "math.inc"
#include "membran.inc"
global_settings {
assumed_gamma 1
}
#declare imagescale = 0.037;
camera {
location <-33, 20, 50>
look_at <0, -0.005, 0>
right x * imagescale
up (9/32) * y * imagescale
}
background { color rgbt <0,0,0,1> }
light_source {
<10, 15, 40> color White
area_light <1,0,0> <0,0,1>, 10, 10
adaptive 1
jitter
}
//sky_sphere {
// pigment {
// color rgb<1,1,1>
// }
//}
//
// draw an arrow from <from> to <to> with thickness <arrowthickness> with
// color <c>
//
#macro arrow(from, to, arrowthickness, c)
#declare arrowdirection = vnormalize(to - from);
#declare arrowlength = vlength(to - from);
union {
sphere {
from, 1.1 * arrowthickness
}
cylinder {
from,
from + (arrowlength - 5 * arrowthickness) * arrowdirection,
arrowthickness
}
cone {
from + (arrowlength - 5 * arrowthickness) * arrowdirection,
2 * arrowthickness,
to,
0
}
pigment {
color c
}
finish {
specular 0.9
metallic
}
}
#end
//arrow(<-1.1,0,0>, <1.1,0,0>, 0.01, White)
//arrow(<0,-1.1,0>, <0,1.1,0>, 0.01, White)
//arrow(<0,0,-1.1>, <0,0,1.1>, 0.01, White)
mesh {
flaeche()
pigment {
color rgb<0.8,0.8,0.8> * 1.2
}
finish {
specular 0.95
metallic
}
}
#declare randr = 0.01;
#macro zylinder(k,n,r)
cylinder {
< cos((2*k+1)*pi/(2*n)), 0, sin((2*k+1)*pi/(2*n)) >,
< -cos((2*k+1)*pi/(2*n)), 0, -sin((2*k+1)*pi/(2*n)) >,
r
}
#end
#macro ring(R,r)
#declare phisteps = 100;
#declare phistep = 2 * pi / 100;
#declare phimin = 0;
#declare phimax = 2 * pi;
#declare phi = phimin;
#while (phi < phimax - phistep/2)
cylinder {
<R*cos(phi), 0, R*sin(phi)>,
<R*cos(phi+phistep), 0, R*sin(phi+phistep)>,
r
}
sphere {
<R*cos(phi), 0, R*sin(phi)>, r
}
#declare phi = phi + phistep;
#end
#end
#declare nullstelle = 13.0152;
union {
ring(1, randr)
pigment {
color rgb<1.0,0.8,0.6>
}
finish {
specular 0.95
metallic
}
}
union {
zylinder(0, 3, 0.5*randr)
zylinder(1, 3, 0.5*randr)
zylinder(2, 3, 0.5*randr)
ring(6.3802/nullstelle, 0.5*randr)
ring(9.7610/nullstelle, 0.5*randr)
pigment {
color rgb<1.0,0.8,0.6>
}
finish {
specular 0.95
metallic
}
}
#declare r = 0.2*randr;
union {
phigitter()
pigment {
color rgb<0.2,0.6,1.0>
}
finish {
specular 0.95
metallic
}
}
union {
rgitter()
pigment {
color rgb<1.0,0.4,0.6>
}
finish {
specular 0.95
metallic
}
}
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