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Original file (676 × 720 pixels, file size: 174 KB, MIME type: image/png)
Summary
Template:Created with Persistence of Vision
Summary
| Description |
English: A trefoil knot. |
|---|---|
| Source |
Own work |
| Date |
2010-03-21 |
| Author | |
| Permission (Reusing this file) |
See below.
|
Licensing
 | I, the copyright holder of this work, hereby release it into the public domain. This applies worldwide. If this is not legally possible: |
Source
This image was created using POV-Ray for Windows, version 3.6. The image was rendered to an 1800 x 1800 square, using 0.3 anti-aliasing.
#include "colors.inc"
/* Makes a trefoil knot using a hypotrochoid */
background { color White }
global_settings { assumed_gamma 1.0}
camera
{
location <0, 0, -25>
right <1,0,0> up <0,1,0>
look_at <0, 0, 0>
angle 5
}
light_source
{
<0, 20, -50>
color White
area_light <5, 0, 0>, <0, 5, 0>, 10, 10 /* very slow, decrease 10 to 2 for experiments */
adaptive 3
}
#declare r_tube = 0.1;
#declare num_steps = 36;
#declare step_size = 1/num_steps;
sphere_sweep
{
cubic_spline num_steps+3,
#declare N = -1;
#while(N <= num_steps + 1)
#declare theta = 2 * pi * N * step_size;
<0.3*( 2*sin(2*theta)-sin(theta) ), 0.3*( 2*cos(2*theta)+cos(theta) ), 0.3*sin(3*theta)>, r_tube
/* uses a hypotrochoid */
#declare N = N + 1;
#end
pigment { color rgb <0,0.25,1> }
finish
{
ambient 0.15
diffuse 0.85
brilliance 2
phong 0.25
phong_size 5
}
}
plane
{
<0,0,-1>, -0.4
pigment { color White }
finish
{
ambient 0.35
diffuse 0.65
}
}
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 11:51, 21 November 2023 | | 676 × 720 (174 KB) | Isidore (talk | contribs) | {{Created with Persistence of Vision}} == {{int:filedesc}} == {{Information |Description={{en|1=A trefoil knot.}} |Source={{own}} |Author=Jim.belk |Date=2010-03-21 |Permission= |other_versions= }} == {{int:license-header}} == {{PD-self}} == Source == This image was created using POV-Ray for Windows, version 3.6. The image was rendered to an 1800 x 1800 square, using 0.3 anti-aliasing. <syntaxhighlight lang="pov"> #include "colors.inc" /* Makes a trefoil knot using... |
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