test/functional/test_bbox.py

   1 #!/usr/bin/env python
   2 import sys; sys.path[:0] = ["../.."]
   3
   4 from pyx import *
   5 from pyx.path import *
   6
   7 def bboxrect(cmd):
   8     return cmd.bbox().rect()
   9
  10 def drawpathwbbox(c, p):
  11     c.stroke(p, [color.rgb.red])
  12     np = p.normpath()
  13     c.stroke(np, [color.rgb.green, style.linestyle.dashed])
  14     c.stroke(bboxrect(p))
  15
  16 def testarcbbox(c):
  17     for phi in range(0,360,30):
  18        drawpathwbbox(c,path(arc(phi*0.1, phi*0.1, 1, 0, phi)))
  19
  20     for phi in range(0,360,30):
  21        drawpathwbbox(c,path(arc(phi*0.1, 5+phi*0.1, 1, phi, 360)))
  22
  23     for phi in range(0,360,30):
  24        drawpathwbbox(c,path(arc(phi*0.1, 10+phi*0.1, 1, phi, phi+30)))
  25
  26     for phi in range(0,360,30):
  27        drawpathwbbox(c,path(arc(phi*0.1, 15+phi*0.1, 1, phi, phi+120)))
  28
  29     for phi in range(0,360,30):
  30        drawpathwbbox(c,path(arc(phi*0.1, 20+phi*0.1, 1, phi, phi+210)))
  31
  32     for phi in range(0,360,30):
  33        drawpathwbbox(c,path(arc(phi*0.1, 25+phi*0.1, 1, phi, phi+300)))
  34
  35     for phi in range(0,360,30):
  36        drawpathwbbox(c,path(arc(phi*0.1, 30+phi*0.1, 1, phi, phi+390)))
  37
  38
  39     for phi in range(0,360,30):
  40        drawpathwbbox(c,path(moveto(20+phi*0.1, phi*0.09),
  41                             arc(20+phi*0.1, phi*0.1, 1, 0, phi)))
  42
  43     for phi in range(0,360,30):
  44        drawpathwbbox(c,path(moveto(20+phi*0.1, 5+phi*0.11),
  45                             arc(20+phi*0.1, 5+phi*0.1, 1, 0, phi)))
  46
  47     for phi in range(0,360,30):
  48        drawpathwbbox(c,path(moveto(20+phi*0.1, 10+phi*0.09),
  49                             arcn(20+phi*0.1, 10+phi*0.1, 1, 0, phi)))
  50
  51     for phi in range(0,360,30):
  52        drawpathwbbox(c,path(moveto(20+phi*0.1, 15+phi*0.11),
  53                             arcn(20+phi*0.1, 15+phi*0.1, 1, 0, phi)))
  54
  55     for phi in range(0,360,30):
  56        drawpathwbbox(c,path(moveto(50+phi*0.1, phi*0.09),
  57                             arc(50+phi*0.1, phi*0.1, 1, 0, phi),
  58                             rlineto(1,1)))
  59
  60     for phi in range(0,360,30):
  61        drawpathwbbox(c,path(moveto(50+phi*0.1, 5+phi*0.11),
  62                             arc(50+phi*0.1, 5+phi*0.1, 1, 0, phi),
  63                             rlineto(1,1)))
  64
  65     for phi in range(0,360,30):
  66        drawpathwbbox(c,path(moveto(50+phi*0.1, 10+phi*0.09),
  67                             arcn(50+phi*0.1, 10+phi*0.1, 1, 0, phi),
  68                             rlineto(1,1)))
  69
  70     for phi in range(0,360,30):
  71        drawpathwbbox(c,path(moveto(50+phi*0.1, 15+phi*0.11),
  72                             arcn(50+phi*0.1, 15+phi*0.1, 1, 0, phi),
  73                             rlineto(1,1)))
  74
  75
  76 def testcurvetobbox(c):
  77     drawpathwbbox(c,path(moveto(10,60), curveto(12,66,14,65,12,69)))
  78
  79
  80 def testtrafobbox(c):
  81     sc=c.insert(canvas.canvas([trafo.translate(0,40).rotated(10)]))
  82
  83     p=path(moveto(10,10), curveto(12,16,14,15,12,19));   drawpathwbbox(sc,p)
  84     p=path(moveto(5,17), curveto(6,18, 5,16, 7,15));     drawpathwbbox(sc,p)
  85
  86
  87 def testclipbbox(c):
  88     clip = canvas.clip(rect(11,-9,10,5))
  89
  90     p1 = path(moveto(10,-10), curveto(12,-4, 14,-5, 12,-1));
  91     p2 = path(moveto(12,-8), curveto(6,-2, 5,-4, 7,-5));
  92
  93     # just a simple test for clipping
  94     sc = c.insert(canvas.canvas([clip]))
  95     drawpathwbbox(sc, p1)
  96     drawpathwbbox(sc, p2)
  97
  98     # more complicated operations
  99
 100     # 1. transformation followed by clipping:
 101     # in this case, the clipping path will be evaluated in the
 102     # context of the already transformed canvas, so that the
 103     # actually displayed portion of the path should be the same
 104     sc = c.insert(canvas.canvas([trafo.translate(5,0), clip]))
 105     drawpathwbbox(sc, p1)
 106     drawpathwbbox(sc, p2)
 107
 108     # 2. clipping followed by transformation
 109     # in this case, the clipping path will not be transformed, so
 110     # that the display portionof the path should change
 111     sc = c.insert(canvas.canvas([clip, trafo.translate(1,1)]))
 112     drawpathwbbox(sc, p1)
 113     drawpathwbbox(sc, p2)
 114
 115
 116 c = canvas.canvas()
 117 testarcbbox(c)
 118 testcurvetobbox(c)
 119 testtrafobbox(c)
 120 testclipbbox(c)
 121 c.writeEPSfile("test_bbox", paperformat=document.paperformat.A4, rotated=1, fittosize=1)
 122 c.writePDFfile("test_bbox")