www/png/example.py

   1 import math
   2 from pyx import *
   3
   4 class phasecolorsurface(graph.style.surface):
   5
   6     def midcolor(self, *c):
   7         return math.atan2(sum([math.sin(x) for x in c]), sum([math.cos(x) for x in c]))
   8
   9 g = graph.graphxyz(size=3.5, zscale=0.3, projector=graph.graphxyz.central(3, 25, 8),
  10                    x=graph.axis.lin(painter=None),
  11                    y=graph.axis.lin(painter=None),
  12                    z=graph.axis.lin(painter=None),
  13                    x2=None, y2=None)
  14 g.plot(graph.data.file("example.dat", x=1, y=2, z=3, color=4), [phasecolorsurface(gradient=color.rgbgradient.Rainbow, coloraxis=graph.axis.lin(min=-math.pi, max=math.pi), backcolor=color.rgb.black, keygraph=None)])
  15 g.writeEPSfile("example")