www/png/example.py

   1 import math
   2 from pyx import *
   3
   4 class rgbgradient(color.lineargradient):
   5
   6     def getcolor(self, x):
   7         return color.lineargradient.getcolor(self, x).rgb()
   8
   9 rgbHue = rgbgradient(color.hsb(0, 1, 1), color.hsb(1, 1, 1))
  10
  11 class phasecolorsurface(graph.style.surface):
  12
  13     def midcolor(self, *c):
  14         return math.atan2(sum([math.sin(x) for x in c]), sum([math.cos(x) for x in c]))
  15
  16 g = graph.graphxyz(size=3.5, zscale=0.3, projector=graph.graphxyz.central(3, 25, 8),
  17                    x=graph.axis.lin(painter=None),
  18                    y=graph.axis.lin(painter=None),
  19                    z=graph.axis.lin(painter=None),
  20                    x2=None, y2=None)
  21 g.plot(graph.data.file("example.dat", x=1, y=2, z=3, color=4), [phasecolorsurface(gradient=rgbHue, backcolor=color.rgb.black)])
  22 g.writeEPSfile("example")