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"""Simple test for the GenericModule.
"""
# Author: Prabhu Ramachandran <prabhu [at] aero . iitb . ac . in>
# Copyright (c) 2008, Prabhu Ramachandran
# 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 TestGenericModule(TestCase):
def test(self):
self.main()
def do(self):
############################################################
# Imports.
script = self.script
from mayavi.filters.optional import Optional
from mayavi.filters.warp_scalar import WarpScalar
from mayavi.filters.cut_plane import CutPlane
from mayavi.components.poly_data_normals import PolyDataNormals
from mayavi.components.contour import Contour
from mayavi.components.actor import Actor
from mayavi.modules.generic_module import GenericModule
from mayavi.sources.vtk_xml_file_reader import VTKXMLFileReader
############################################################
# Create a new scene and set up the visualization.
s = self.new_scene()
# Read a VTK (old style) data file.
r = VTKXMLFileReader()
r.initialize(get_example_data('fire_ug.vtu'))
script.add_source(r)
# We now create the complete equivalent of a ScalarCutPlane in
# the next block!
cp = CutPlane()
w = WarpScalar()
warper = Optional(filter=w, label_text='Enable warping', enabled=False)
c = Contour()
ctr = Optional(filter=c, label_text='Enable contours', enabled=False)
p = PolyDataNormals(name='Normals')
normals = Optional(filter=p, label_text='Compute normals', enabled=False)
a = Actor()
components = [cp, warper, ctr, normals, a]
m = GenericModule(name='ScalarCutPlane',
components=components,
contour=c, actor=a)
script.add_module(m)
s.scene.isometric_view()
########################################
# do the testing.
def check(mod):
"""Check if test status is OK for the given module."""
cut, warper, ctr, normals, a = mod.components
c = ctr.filter
# The intermediate ones are disabled.
assert normals.outputs[0] is cut.outputs[0]
# Enable the contours.
ctr.enabled = True
assert ctr.outputs[0] is c.outputs[0]
assert ctr.outputs[0] is normals.outputs[0]
n_output = get_output(normals.outputs[0])
rng = n_output.point_data.scalars.range
assert (rng[1] - rng[0]) < 1e-4
# Turn on auto-contours
c.auto_contours = True
# Increase number of contours and the range should change.
c.number_of_contours = 10
n_output = get_output(normals.outputs[0])
assert len(n_output.points) != 0
rng = n_output.point_data.scalars.range
assert rng[0] < rng[1]
# Check if pipeline_changed is correctly propagated.
old = get_output(normals.outputs[0])
assert a.mapper.scalar_mode == 'default'
c.filled_contours = True
n_output = get_output(normals.outputs[0])
c_output = get_output(c.outputs[0])
assert n_output != old
assert n_output is c_output
# Check if the actor responds correctly to the
# filled_contour change.
assert a.mapper.scalar_mode == 'use_cell_data'
# Set back everything to original state.
c.filled_contours = False
assert a.mapper.scalar_mode == 'default'
c.number_of_contours = 1
c.auto_contours = False
ctr.enabled = False
assert normals.outputs[0] is cut.outputs[0]
check(m)
############################################################
# 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
s.scene.isometric_view()
# Now do the check.
m = s.children[0].children[0].children[0]
check(m)
############################################################
# 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.
m = s.children[0].children[0].children[0]
s.scene.isometric_view()
check(m)
# 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.
m = s.children[0].children[0].children[0]
s.scene.isometric_view()
check(m)
# If we have come this far, we are golden!
if __name__ == "__main__":
t = TestGenericModule()
t.test()
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