1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
//
// curvature.pov
//
// (c) 2022 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
//
#version 3.7;
#include "colors.inc"
global_settings {
assumed_gamma 1
}
#declare imagescale = 0.13;
camera {
location <10, 10, -40>
look_at <0, 0, 0>
right x * imagescale
up y * imagescale
}
light_source {
<-10, 10, -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(<-2.7,0,0>, <2.7,0,0>, 0.03, White)
arrow(<0,-2.7,0>, <0,2.7,0>, 0.03, White)
arrow(<0,0,-2.7>, <0,0,2.7>, 0.03, White)
#include "spherecurve.inc"
|
