def test_property(self):
"""Test if Property's color works ok in all circumstances."""
p = tvtk.Property()
val = (0., 1., 0.)
p.color = val
p.specular = 1.0
self.assertEqual(p.specular_color, val)
self.assertEqual(p.diffuse_color, val)
self.assertEqual(p.ambient_color, val)
sc = (1., 0., 1.)
p.specular_color = sc
self.assertEqual(p.specular_color, sc)
self.assertEqual(p.diffuse_color, val)
self.assertEqual(p.ambient_color, val)
self.assertEqual(p.color, (0.5, 0.5, 0.5))
# Test pickling.
s = cPickle.dumps(p)
del p
p = cPickle.loads(s)
self.assertEqual(p.specular_color, sc)
self.assertEqual(p.diffuse_color, val)
self.assertEqual(p.ambient_color, val)
self.assertEqual(p.color, (0.5, 0.5, 0.5))
def earth_actor(radius=0.5, opacity=1.0):
""" Creates an earth source and returns the actor. """
source = tvtk.EarthSource(radius=radius, on_ratio=16, outline=0)
mapper = tvtk.PolyDataMapper(input=source.output)
prop = tvtk.Property(opacity=opacity)
actor = tvtk.Actor(mapper=mapper, property=prop)
return actor
def test_obj_del(self):
"""Test object deletion and reference cycles."""
p = tvtk.Property()
p.representation = 0
ref = weakref.ref(p)
del p
self.assertEqual(ref(), None)
def arrow_actor(color=colors.peacock, opacity=1.0, resolution=24):
""" Creates a 3D Arrow and returns an actor. """
source = tvtk.ArrowSource(tip_resolution=resolution,
shaft_resolution=resolution)
mapper = tvtk.PolyDataMapper(input=source.output)
prop = tvtk.Property(opacity=opacity, color=color)
actor = tvtk.Actor(mapper=mapper, property=prop)
return actor
def cube_actor(center=(0, 0, 0), color=colors.blue, opacity=1.0):
""" Creates a cube and returns the tvtk.Actor. """
source = tvtk.CubeSource(center=center)
mapper = tvtk.PolyDataMapper(input=source.output)
p = tvtk.Property(opacity=opacity, color=color)
actor = tvtk.Actor(mapper=mapper, property=p)
return actor
def cylinder_actor(center=(0, 0, 0), radius=0.5, resolution=64,
color=colors.green, opacity=1.0):
""" Creates a cylinder and returns a tvtk.Actor. """
source = tvtk.CylinderSource(center=center, radius=radius,
resolution=resolution)
mapper = tvtk.PolyDataMapper(input=source.output)
prop = tvtk.Property(opacity=opacity, color=color)
actor = tvtk.Actor(mapper=mapper, property=prop)
return actor
def sphere_actor(center=(0, 0, 0), radius=0.5, resolution=32,
color=colors.purple, opacity=1.0):
""" Creates a sphere and returns the actor. """
source = tvtk.SphereSource(center=center, radius=radius,
theta_resolution=resolution,
phi_resolution=resolution)
mapper = tvtk.PolyDataMapper(input=source.output)
prop = tvtk.Property(opacity=opacity, color=color)
actor = tvtk.Actor(mapper=mapper, property=prop)
return actor
def cone_actor(center=(0, 0, 0), height=1.0, radius=0.5,
direction=(1, 0, 0), resolution=100, color=colors.red,
opacity=1.0):
""" Sets up a cone actor and returns the tvtk.Actor object."""
source = tvtk.ConeSource(center=center, height=height,
radius=radius, direction=direction,
resolution=resolution)
mapper = tvtk.PolyDataMapper(input=source.output)
p = tvtk.Property(opacity=opacity, color=color)
actor = tvtk.Actor(mapper=mapper, property=p)
return actor
def show(d):
l = tvtk.LookupTable(table_range=(0, 1))
m = tvtk.PolyDataMapper(input=d.output,
scalar_visibility=True,
scalar_mode="use_cell_data")
p = tvtk.Property(representation="s")
a = tvtk.Actor(mapper=m, property=p)
ren = tvtk.Renderer(background=(.1, .2, .4))
ren.add_actor(a)
rw = tvtk.RenderWindow(size=(600, 600))
rw.add_renderer(ren)
rwi = tvtk.RenderWindowInteractor(render_window=rw)
rwi.initialize()
rwi.start()
def test_do_change(self):
"""Test if VTK object changes when trait is changed."""
p = tvtk.Property()
p.edge_visibility = not p.edge_visibility
p.representation = 'p'
p.interpolation = 'phong'
p.opacity = 0.5
p.color = (0, 1, 0)
p.diffuse_color = (1, 1, 1)
p.specular_color = (1, 1, 0)
for t, g in p._updateable_traits_:
val = getattr(p._vtk_obj, g)()
if t in ['representation', 'interpolation']:
self.assertEqual(val, getattr(p, t + '_'))
else:
self.assertEqual(val, getattr(p, t))
def __init__(self):
self.b = False
self.i = 7
self.l = 1234567890123456789
self.f = math.pi
self.c = complex(1.01234, 2.3)
self.n = None
self.s = 'String'
self.u = u'Unicode'
self.inst = A()
self.tuple = (1, 2, 'a', A())
self.list = [1, 1.1, 'a', 1j, self.inst]
self.pure_list = range(5)
self.dict = {'a': 1, 'b': 2, 'ref': self.inst}
self.numeric = numpy.ones((2, 2, 2), 'f')
self.ref = self.numeric
self._tvtk = tvtk.Property()
def test_init_traits(self):
"""Test if the objects traits can be set in __init__."""
p = tvtk.Property(opacity=0.1, color=(1, 0, 0), representation='p')
self.assertEqual(p.opacity, 0.1)
self.assertEqual(p.color, (1.0, 0.0, 0.0))
self.assertEqual(p.representation, 'points')
# Test case where the object traits are wrong.
self.assertRaises(TraitError, tvtk.Property, foo='bar')
cs = tvtk.ConeSource(radius=0.1, height=0.5, resolution=32)
self.assertEqual(cs.radius, 0.1)
self.assertEqual(cs.height, 0.5)
self.assertEqual(cs.resolution, 32)
# Test case where the object traits are wrong.
self.assertRaises(TraitError, tvtk.ConeSource, foo=1)
def test_tvtk_dataset_name(self):
"Can tvtk datasets can be converted to names correctly."
datasets = [
tvtk.ImageData(),
tvtk.StructuredPoints(),
tvtk.RectilinearGrid(),
tvtk.StructuredGrid(),
tvtk.PolyData(),
tvtk.UnstructuredGrid(),
tvtk.Property(), # Not a dataset!
'foo', # Not a TVTK object.
]
expect = [
'image_data', 'image_data', 'rectilinear_grid', 'structured_grid',
'poly_data', 'unstructured_grid', 'none', 'none'
]
result = [pipeline_info.get_tvtk_dataset_name(d) for d in datasets]
self.assertEqual(result, expect)
def test_property_change_notification(self):
"""Test if changes to properties generate notification events."""
# Create a dummy class to test with.
class Junk:
def f(self, obj, name, old, new):
self.data = obj, name, old, new
z = Junk()
cs = tvtk.ConeSource()
m = tvtk.PolyDataMapper()
m.on_trait_change(z.f, 'input')
m.input = cs.output
self.assertEqual(z.data, (m, 'input', None, cs.output))
m.input = None
self.assertEqual(z.data, (m, 'input', cs.output, None))
m.on_trait_change(z.f, 'input', remove=True)
m.input = cs.output
a = tvtk.Actor()
a.on_trait_change(z.f, 'mapper')
a.on_trait_change(z.f, 'property')
a.mapper = m
self.assertEqual(z.data, (a, 'mapper', None, m))
old = a.property
new = tvtk.Property()
a.property = new
self.assertEqual(z.data, (a, 'property', old, new))
# Check if property notification occurs on add_input/remove_input
a = tvtk.AppendPolyData()
a.on_trait_change(z.f, 'input')
pd = tvtk.PolyData()
a.add_input(pd)
old, new = None, pd
self.assertEqual(z.data, (a, 'input', old, new))
a.remove_input(pd)
old, new = pd, None
self.assertEqual(z.data, (a, 'input', old, new))
a.remove_all_inputs()
old, new = None, None
self.assertEqual(z.data, (a, 'input', old, new))
def test_auto_update(self):
"""Test if traits are updated when the VTK object changes."""
p = tvtk.Property()
obj = p._vtk_obj
obj.SetEdgeVisibility(1)
self.assertEqual(p.edge_visibility, 1)
obj.SetOpacity(0.5)
self.assertEqual(p.opacity, 0.5)
obj.SetRepresentationToPoints()
self.assertEqual(p.representation, 'points')
val = (1.0, 1.0, 0.0)
obj.SetColor(val)
self.assertEqual(p.color, val)
val = (1.0, 0.0, 0.0)
obj.SetDiffuseColor(val)
self.assertEqual(p.diffuse_color, val)
val = (0.0, 1.0, 0.0)
obj.SetSpecularColor(val)
self.assertEqual(p.specular_color, val)
# To access any VTK object, we use 'tvtk', which is a Python wrapping of # VTK replacing C++ setters and getters by Python properties and # converting numpy arrays to VTK arrays when setting data. from enthought.tvtk.api import tvtk v = mlab.figure() # Create a first sphere # The source generates data points sphere = tvtk.SphereSource(center=(0, 0, 0), radius=0.5) # The mapper converts them into position in, 3D with optionally color (if # scalar information is available). sphere_mapper = tvtk.PolyDataMapper(input=sphere.output) # The Property will give the parameters of the material. p = tvtk.Property(opacity=0.2, color=(1, 0, 0)) # The actor is the actually object in the scene. sphere_actor = tvtk.Actor(mapper=sphere_mapper, property=p) v.scene.add_actor(sphere_actor) # Create a second sphere sphere2 = tvtk.SphereSource(center=(7, 0, 1), radius=0.2) sphere_mapper2 = tvtk.PolyDataMapper(input=sphere2.output) p = tvtk.Property(opacity=0.3, color=(1, 0, 0)) sphere_actor2 = tvtk.Actor(mapper=sphere_mapper2, property=p) v.scene.add_actor(sphere_actor2) # Create a line between the two spheres line = tvtk.LineSource(point1=(0, 0, 0), point2=(7, 0, 1)) line_mapper = tvtk.PolyDataMapper(input=line.output) line_actor = tvtk.Actor(mapper=line_mapper)
