gallery/path/circles.py

   1 from pyx import *
   2
   3 circ1 = path.circle(0, 0, 1.5)
   4 circ2 = path.circle(1, 1, 1)
   5 (circ1a, circ1b), (circ2a, circ2b) = circ1.intersect(circ2)
   6 intersection = (circ2.split([circ2b, circ2a])[1]
   7                 << circ1.split([circ1a, circ1b])[1])
   8 intersection[-1].close()
   9
  10 union = (circ1.split([circ1a, circ1b])[0]
  11          << circ2.split([circ2b, circ2a])[0])
  12 union[-1].close()
  13
  14 c = canvas.canvas()
  15 c.fill(union, [color.rgb.blue])
  16 c.fill(intersection, [color.rgb.red])
  17 c.stroke(circ1)
  18 c.stroke(circ2)
  19 c.writeEPSfile("circles")
  20 c.writePDFfile("circles")