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import sys
if sys.path[0] != "../..":
sys.path.insert(0, "../..")
import unittest
import math
from pyx import *
class BoxTestCase(unittest.TestCase):
def testDistance(self):
b1 = box.polygon(center=(0.5, math.sqrt(3)/6), corners=((0, 0), (1, 0), (0.5, math.sqrt(3)/2)))
b2 = box.polygon(center=(0.5, math.sqrt(3)/6), corners=((0, 0), (1, 0), (0.5, math.sqrt(3)/2)))
b2.transform(trafo.translate(3, 0))
b3 = box.polygon(center=(0.5, math.sqrt(3)/6), corners=((0, 0), (1, 0), (0.5, math.sqrt(3)/2)))
b3.transform(trafo.translate(3, 3 * math.tan(math.pi/6)))
b4 = box.polygon(center=(0.5, math.sqrt(3)/6), corners=((0, 0), (1, 0), (0.5, math.sqrt(3)/2)))
b4.transform(trafo.translate(0, 3))
b5 = box.polygon(center=(0.5, math.sqrt(3)/6), corners=((0, 0), (1, 0), (0.5, math.sqrt(3)/2)))
b5.transform(trafo.translate(0.5, 0.5))
self.assertAlmostEqual(unit.topt(b1.boxdistance(b2)), unit.topt(2))
self.assertAlmostEqual(unit.topt(b1.boxdistance(b3)), unit.topt(math.sqrt(9*(1 + math.tan(math.pi/6)**2)) - math.sqrt(3)/2))
self.assertAlmostEqual(unit.topt(b1.boxdistance(b4)), unit.topt(3 - math.sqrt(3)/2))
self.assertAlmostEqual(unit.topt(b2.boxdistance(b1)), unit.topt(2))
self.assertAlmostEqual(unit.topt(b3.boxdistance(b1)), unit.topt(math.sqrt(9*(1 + math.tan(math.pi/6)**2)) - math.sqrt(3)/2))
self.assertAlmostEqual(unit.topt(b4.boxdistance(b1)), unit.topt(3 - math.sqrt(3)/2))
self.assertRaises(box.BoxCrossError, b1.boxdistance, b5)
self.assertRaises(box.BoxCrossError, b5.boxdistance, b1)
if __name__ == "__main__":
unittest.main()
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