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"""Test the vtk.mutable() type and test pass-by-reference.
Created on Sept 19, 2010 by David Gobbi
"""
import sys
import vtk
from vtk.test import Testing
class TestMutable(Testing.vtkTest):
def testFloatMutable(self):
m = vtk.mutable(3.0)
n = vtk.mutable(4.0)
m *= 2
self.assertEqual(m, 6.0)
self.assertEqual(str(m), str(m.get()))
o = n + m
self.assertEqual(o, 10.0)
def testIntMutable(self):
m = vtk.mutable(3)
n = vtk.mutable(4)
m |= n
self.assertEqual(m, 7.0)
self.assertEqual(str(m), str(m.get()))
def testStringMutable(self):
m = vtk.mutable("%s %s!")
m %= ("hello", "world")
self.assertEqual(m, "hello world!")
def testPassByReference(self):
t = vtk.mutable(0.0)
p0 = (0.5, 0.0, 0.0)
n = (1.0, 0.0, 0.0)
p1 = (0.0, 0.0, 0.0)
p2 = (1.0, 1.0, 1.0)
x = [0.0, 0.0, 0.0]
vtk.vtkPlane.IntersectWithLine(p1, p2, n, p0, t, x)
self.assertEqual(round(t,6), 0.5)
self.assertEqual(round(x[0],6), 0.5)
self.assertEqual(round(x[1],6), 0.5)
self.assertEqual(round(x[2],6), 0.5)
t.set(0)
p = vtk.vtkPlane()
p.SetOrigin(0.5, 0.0, 0.0)
p.SetNormal(1.0, 0.0, 0.0)
p.IntersectWithLine(p1, p2, t, x)
self.assertEqual(round(t,6), 0.5)
self.assertEqual(round(x[0],6), 0.5)
self.assertEqual(round(x[1],6), 0.5)
self.assertEqual(round(x[2],6), 0.5)
if __name__ == "__main__":
Testing.main([(TestMutable, 'test')])
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