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| View Original: | Non-Desargues configuration.svg (540x531) | |||
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| Keywords: Non-Desargues configuration.svg A 10<sub>3</sub> configuration that is not incidence-isomorphic to a Desargues configuration Redrawn more accurately from a bitmap image by Michael Hardy en Image Pentagrams png own 2008-04-08 David Eppstein Source code This image was created as a pdf file by the following Python code then recolored in Adobe Illustrator and converted to SVG <source lang python > from pyx import canvas path color from math import rot e pi 0 4j i for i in range 5 def orient p q return p real q imag - p imag q real def testx x p rot1 real + 1j x return orient p - 1 p rot3 - 1 lo hi 3 4 while hi - lo > 1e-8 mid lo+hi /2 0 if testx mid < 0 hi mid else lo mid c canvas canvas scale 2 0 def edge p q c stroke path line p real scale p imag scale q real scale q imag scale color rgb black def point p c fill path circle p real scale p imag scale 0 08 scale color rgb red for i in range 5 p2 1 roti-4 p3 rot1 real + 1j mid roti p4 p3 rot2 edge p3 p4 edge p4 p2 for i in range 5 point 1 roti point rot1 real + 1j mid roti c writePDFfile Non-Desargues configuration </source> Files by User David Eppstein from en wikipedia Projective geometry Lines and points Images with Python source code | ||||
