File:Blue Trefoil Knot.png
Original file (1,690 × 1,800 pixels, file size: 583 KB, MIME type: image/png)
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Summary[edit]
DescriptionBlue Trefoil Knot.png |
English: A trefoil knot. |
Date | |
Source | Own work |
Author | Jim.belk |
Licensing[edit]
Public domainPublic domainfalsefalse |
I, the copyright holder of this work, release this work into the public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law. |
Source[edit]
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
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 15:45, 15 May 2015 | 1,690 × 1,800 (583 KB) | RokerHRO (talk | contribs) | optipng -o7 -i0 → 5.71% decrease | |
00:13, 6 February 2011 | 1,690 × 1,800 (619 KB) | Beao (talk | contribs) | Transparent. | ||
23:16, 22 March 2010 | 1,690 × 1,800 (530 KB) | AnonMoos (talk | contribs) | cropping left and right margins, increasing PNG compression | ||
18:43, 21 March 2010 | 1,800 × 1,800 (993 KB) | Jim.belk (talk | contribs) | {{Information |Description={{en|1=A trefoil knot.}} |Source={{own}} |Author=Jim.belk |Date=2010-03-21 |Permission= |other_versions= }} Category:Trefoil knots |
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Horizontal resolution | 28.35 dpc |
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Vertical resolution | 28.35 dpc |
File change date and time | 00:13, 6 February 2011 |