def testBufferShared(self):
"""Test the special buffer_shared() check that VTK provides."""
a = bytearray(b'hello')
self.assertEqual(vtk.buffer_shared(a, a), True)
b = bytearray(b'hello')
self.assertEqual(vtk.buffer_shared(a, b), False)
a = vtk.vtkFloatArray()
a.SetNumberOfComponents(3)
a.InsertNextTuple((10, 7, 4))
a.InsertNextTuple((85, 8, 2))
b = vtk.vtkFloatArray()
b.SetVoidArray(a, 6, True)
self.assertEqual(vtk.buffer_shared(a, b), True)
c = vtk.vtkFloatArray()
c.DeepCopy(a)
self.assertEqual(vtk.buffer_shared(a, c), False)
if sys.hexversion >= 0x02070000:
m = memoryview(a)
self.assertEqual(vtk.buffer_shared(a, m), True)
if sys.hexversion < 0x03000000:
m = buffer(a)
self.assertEqual(vtk.buffer_shared(a, m), True)
def testBufferShared(self):
"""Test the special buffer_shared() check that VTK provides."""
a = bytearray(b'hello')
self.assertEqual(vtk.buffer_shared(a, a), True)
b = bytearray(b'hello')
self.assertEqual(vtk.buffer_shared(a, b), False)
a = vtk.vtkFloatArray()
a.SetNumberOfComponents(3)
a.InsertNextTuple((10, 7, 4))
a.InsertNextTuple((85, 8, 2))
b = vtk.vtkFloatArray()
b.SetVoidArray(a, 6, True)
self.assertEqual(vtk.buffer_shared(a, b), True)
c = vtk.vtkFloatArray()
c.DeepCopy(a)
self.assertEqual(vtk.buffer_shared(a, c), False)
if sys.hexversion >= 0x02070000:
m = memoryview(a)
self.assertEqual(vtk.buffer_shared(a, m), True)
if sys.hexversion < 0x03000000:
m = buffer(a)
self.assertEqual(vtk.buffer_shared(a, m), True)
def __array_finalize__(self, obj):
# Copy the VTK array only if the two share data
slf = _make_tensor_array_contiguous(self)
obj2 = _make_tensor_array_contiguous(obj)
self.VTKObject = None
try:
# This line tells us that they are referring to the same buffer.
# Much like two pointers referring to same memory location in C/C++.
if buffer_shared(slf, obj2):
self.VTKObject = getattr(obj, 'VTKObject', None)
except TypeError:
pass
self.Association = getattr(obj, 'Association', None)
self.DataSet = getattr(obj, 'DataSet', None)
def __array_finalize__(self,obj):
# Copy the VTK array only if the two share data
slf = _make_tensor_array_contiguous(self)
obj2 = _make_tensor_array_contiguous(obj)
self.VTKObject = None
try:
# This line tells us that they are referring to the same buffer.
# Much like two pointers referring to same memory location in C/C++.
if buffer_shared(slf, obj2):
self.VTKObject = getattr(obj, 'VTKObject', None)
except TypeError:
pass
self.Association = getattr(obj, 'Association', None)
self.DataSet = getattr(obj, 'DataSet', None)
