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# Author: Prabhu Ramachandran <prabhu [at] aero . iitb . ac . in>
# Copyright (c) 2008, Enthought, Inc.
# License: BSD Style.
# Standard library imports.
from os.path import abspath
from io import BytesIO
import copy
# Local imports.
from mayavi.core.common import get_output
from common import TestCase, get_example_data
class TestSetActiveAttribute(TestCase):
def check(self):
"""Check if the visualization is OK. Note that this is not an
image based check, which is very convenient.
"""
e = self.script.engine
scene = e.current_scene
src = scene.children[0]
assert src.point_scalars_name == 'u'
c = src.children[1]
sc = get_output(c.outputs[0]).point_data.scalars
assert sc.name == 'u'
# It is an iso-contour!
assert sc.range[0] == sc.range[1]
aa = c.children[0].children[0]
assert aa.point_scalars_name == 't'
sc = get_output(aa.outputs[0]).point_data.scalars
assert sc.name == 't'
assert abs(sc.range[0] - 308) < 1.0
assert abs(sc.range[1] - 631) < 1.0
s = aa.children[0].children[0]
def test(self):
self.main()
def do(self):
"""Test for the SetActiveAttribute filter.
"""
from mayavi.sources.api import VTKXMLFileReader
from mayavi.filters.contour import Contour
from mayavi.filters.api import PolyDataNormals
from mayavi.filters.set_active_attribute import SetActiveAttribute
from mayavi.modules.api import Surface, Outline
mayavi = script = self.script
scene = self.new_scene()
r = VTKXMLFileReader()
r.initialize(get_example_data('fire_ug.vtu'))
mayavi.add_source(r)
r.point_scalars_name = 'u'
o = Outline()
mayavi.add_module(o)
c = Contour()
mayavi.add_filter(c)
n = PolyDataNormals()
mayavi.add_filter(n)
aa = SetActiveAttribute()
mayavi.add_filter(aa)
aa.point_scalars_name = 't'
s = Surface()
mayavi.add_module(s)
scene.scene.isometric_view()
# Check if things are OK.
self.check()
############################################################
# Test if saving a visualization and restoring it works.
# Save visualization.
f = BytesIO()
f.name = abspath('test.mv2') # We simulate a file.
mayavi.save_visualization(f)
f.seek(0) # So we can read this saved data.
# Remove existing scene.
engine = mayavi.engine
engine.close_scene(s)
# Load visualization
mayavi.load_visualization(f)
s = engine.current_scene
# Now do the check.
s.scene.isometric_view()
self.check()
############################################################
# Test if the Mayavi2 visualization can be deep-copied.
# Pop the source object.
source = s.children.pop()
# Add it back to see if that works without error.
s.children.append(source)
# Now do the check.
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.
source1 = copy.deepcopy(source)
s.children[0] = source1
# Now do the check.
s.scene.isometric_view()
self.check()
# If we have come this far, we are golden!
if __name__ == '__main__':
t = TestSetActiveAttribute()
t.test()
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