File:Lissajous Stevedore Knot.png

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Summary

Description
English: A Lissajous stevedore knot.
Date
Source Own work
Author Jim.belk

Licensing

Public domain I, the copyright holder of this work, release this work into the public domain. This applies worldwide.
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I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

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, and then cropped and compressed using pngcrush.

#include "colors.inc"
     
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 = 0.07;
#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;
    < 0.8*cos(3*theta + 1.5), 0.8*cos(2*theta + 0.2) + 0.075, 0.3*cos(5*theta)>, r_tube
    #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
    }
  }

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26 March 2010

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Date/TimeThumbnailDimensionsUserComment
current17:35, 27 March 2010Thumbnail for version as of 17:35, 27 March 20101,694 × 1,780 (629 KB)Jim.belk{{Information |Description={{en|1=A Lissajous stevedore knot.}} |Source={{own}} |Author=Jim.belk |Date=2010-03-26 |Permission= |other_versions= }} Category:Knots (knot theory) Category:Lissajous curves [[Category:Images includin

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