def setUp(self):
"""Initial setting up of test fixture, automatically called by TestCase before any other test method is invoked"""
e = NullEngine()
# Uncomment to see visualization for debugging etc.
#e = Engine()
e.start()
s = e.new_scene()
self.e = e
self.s = s
############################################################
# Create a new scene and set up the visualization.
d = ArraySource()
sc, vec = self.make_data()
d.origin = (-5, -5, -5)
d.scalar_data = sc
d.vector_data = vec
e.add_source(d)
# Create an outline for the data.
o = Outline()
e.add_module(o)
# Glyphs for the scalars
g = Glyph()
e.add_module(g)
g.glyph.glyph_source.glyph_position = 'center'
g.glyph.glyph.vector_mode = 'use_normal'
g.glyph.glyph.scale_factor = 0.5
g.glyph.mask_points.on_ratio = 20
g.actor.property.line_width = 1.0
v = VectorCutPlane()
glyph = v.glyph
gs = glyph.glyph_source
gs.glyph_position = 'tail'
gs.glyph_source = gs.glyph_list[1]
e.add_module(v)
v.implicit_plane.set(normal=(0, 1, 0), origin=(0, 3, 0))
v = VectorCutPlane()
glyph = v.glyph
gs = glyph.glyph_source
gs.glyph_source = gs.glyph_list[2]
gs.glyph_position = 'head'
e.add_module(v)
v.implicit_plane.set(normal=(0, 1, 0), origin=(0, -2, 0))
self.g = g
self.v = v
self.scene = e.current_scene
return
def glyph():
"""The script itself. We needn't have defined a function but
having a function makes this more reusable.
"""
# 'mayavi' is always defined on the interpreter.
# Create a new VTK scene.
mayavi.new_scene()
# Read a VTK (old style) data file.
r = VTKXMLFileReader()
r.initialize(
join(mayavi2.get_data_dir(dirname(abspath(__file__))), 'fire_ug.vtu'))
mayavi.add_source(r)
# Create an outline and a vector cut plane.
mayavi.add_module(Outline())
v = VectorCutPlane()
mayavi.add_module(v)
v.glyph.color_mode = 'color_by_scalar'
# Now mask the points and show glyphs (we could also use
# Vectors but glyphs are a bit more generic)
m = MaskPoints()
m.filter.trait_set(on_ratio=10, random_mode=True)
mayavi.add_filter(m)
g = Glyph()
mayavi.add_module(g)
# Note that this adds the module to the filtered output.
g.glyph.scale_mode = 'scale_by_vector'
# Use arrows to view the scalars.
gs = g.glyph.glyph_source
gs.glyph_source = gs.glyph_dict['arrow_source']
def do(self):
############################################################
# Imports.
script = self.script
from mayavi.sources.array_source import ArraySource
from mayavi.modules.outline import Outline
from mayavi.modules.glyph import Glyph
from mayavi.modules.vector_cut_plane import VectorCutPlane
############################################################
# Create a new scene and set up the visualization.
s = self.new_scene()
d = ArraySource()
sc, vec = self.make_data()
d.origin = (-5, -5, -5)
d.scalar_data = sc
d.vector_data = vec
script.add_source(d)
# Create an outline for the data.
o = Outline()
script.add_module(o)
# Glyphs for the scalars
g = Glyph()
script.add_module(g)
g.glyph.glyph_source.glyph_position = 'center'
g.glyph.glyph.vector_mode = 'use_normal'
g.glyph.glyph.scale_factor = 0.5
g.actor.property.line_width = 1.0
v = VectorCutPlane()
glyph = v.glyph
gs = glyph.glyph_source
gs.glyph_position = 'tail'
gs.glyph_source = gs.glyph_list[1]
script.add_module(v)
v.implicit_plane.trait_set(normal=(0, 1, 0), origin=(0, 3, 0))
v = VectorCutPlane()
glyph = v.glyph
gs = glyph.glyph_source
gs.glyph_source = gs.glyph_list[2]
gs.glyph_position = 'head'
script.add_module(v)
v.implicit_plane.trait_set(normal=(0, 1, 0), origin=(0, -2, 0))
# Set the scene to a suitable view.
self.set_view(s)
self.check()
############################################################
# Test if the modules respond correctly when the components
# are changed.
g.actor = g.actor.__class__()
glyph = g.glyph
g.glyph = glyph.__class__()
g.glyph = glyph
glyph = v.glyph
v.glyph = glyph.__class__()
v.glyph = glyph
v.actor = v.actor.__class__()
v.cutter = v.cutter.__class__()
ip = v.implicit_plane
v.implicit_plane = ip.__class__()
v.implicit_plane = ip
s.render()
self.check()
############################################################
# Test if saving a visualization and restoring it works.
# Save visualization.
f = BytesIO()
f.name = abspath('test.mv2') # We simulate a file.
script.save_visualization(f)
f.seek(0) # So we can read this saved data.
# Remove existing scene.
engine = script.engine
engine.close_scene(s)
# Load visualization
script.load_visualization(f)
s = engine.current_scene
# Set the scene to a suitable view.
self.set_view(s)
self.check()
############################################################
# Test if the MayaVi2 visualization can be deepcopied.
# Pop the source object.
sources = s.children
s.children = []
# Add it back to see if that works without error.
s.children.extend(sources)
self.set_view(s)
self.check()
# Now deepcopy the source and replace the existing one with
# the copy. This basically simulates cutting/copying the
# object from the UI via the right-click menu on the tree
# view, and pasting the copy back.
sources1 = copy.deepcopy(sources)
s.children[:] = sources
self.set_view(s)
self.check()
def do(self):
############################################################
# Imports.
script = self.script
from mayavi.sources.array_source import ArraySource
from mayavi.modules.outline import Outline
from mayavi.modules.glyph import Glyph
from mayavi.modules.vector_cut_plane import VectorCutPlane
############################################################
# Create a new scene and set up the visualization.
s = self.new_scene()
d = ArraySource()
sc, vec = self.make_data()
d.origin = (-5, -5, -5)
d.scalar_data = sc
d.vector_data = vec
script.add_source(d)
# Create an outline for the data.
o = Outline()
script.add_module(o)
# Glyphs for the scalars
g = Glyph()
script.add_module(g)
g.glyph.glyph_source.glyph_position = 'center'
g.glyph.glyph.vector_mode = 'use_normal'
g.glyph.glyph.scale_factor = 0.5
g.actor.property.line_width = 1.0
v = VectorCutPlane()
glyph = v.glyph
gs = glyph.glyph_source
gs.glyph_position = 'tail'
gs.glyph_source = gs.glyph_list[1]
script.add_module(v)
v.implicit_plane.trait_set(normal=(0, 1, 0), origin=(0, 3, 0))
v = VectorCutPlane()
glyph = v.glyph
gs = glyph.glyph_source
gs.glyph_source = gs.glyph_list[2]
gs.glyph_position = 'head'
script.add_module(v)
v.implicit_plane.trait_set(normal=(0, 1, 0), origin=(0, -2, 0))
# Set the scene to a suitable view.
self.set_view(s)
self.check()
############################################################
# Test if the modules respond correctly when the components
# are changed.
g.actor = g.actor.__class__()
glyph = g.glyph
g.glyph = glyph.__class__()
g.glyph = glyph
glyph = v.glyph
v.glyph = glyph.__class__()
v.glyph = glyph
v.actor = v.actor.__class__()
v.cutter = v.cutter.__class__()
ip = v.implicit_plane
v.implicit_plane = ip.__class__()
v.implicit_plane = ip
s.render()
self.check()
############################################################
# Test if saving a visualization and restoring it works.
# Save visualization.
f = BytesIO()
f.name = abspath('test.mv2') # We simulate a file.
script.save_visualization(f)
f.seek(0) # So we can read this saved data.
# Remove existing scene.
engine = script.engine
engine.close_scene(s)
# Load visualization
script.load_visualization(f)
s = engine.current_scene
# Set the scene to a suitable view.
self.set_view(s)
self.check()
############################################################
# Test if the MayaVi2 visualization can be deepcopied.
# Pop the source object.
sources = s.children
s.children = []
# Add it back to see if that works without error.
s.children.extend(sources)
self.set_view(s)
self.check()
# Now deepcopy the source and replace the existing one with
# the copy. This basically simulates cutting/copying the
# object from the UI via the right-click menu on the tree
# view, and pasting the copy back.
sources1 = copy.deepcopy(sources)
s.children[:] = sources
self.set_view(s)
self.check()