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"""Simple test for the grid plane and outline module.
"""
# Author: Prabhu Ramachandran <prabhu_r@users.sf.net>
# Copyright (c) 2005, Enthought, Inc.
# License: BSD Style.
# Standard library imports.
from os.path import abspath
from io import BytesIO
import copy
# Local imports.
from common import TestCase, get_example_data
class TestGridPlane(TestCase):
def check(self):
script = self.script
s = script.engine.current_scene
mm = s.children[0].children[0]
gp1, gp2, gp3 = mm.children[1:]
assert gp1.grid_plane.axis == 'x'
assert gp1.grid_plane.position == 0
assert gp1.actor.property.ambient == 1.0
assert gp2.grid_plane.axis == 'y'
assert gp2.grid_plane.position == 16
assert gp2.actor.property.ambient == 1.0
assert gp3.grid_plane.axis == 'z'
assert gp3.grid_plane.position == 6
assert gp3.actor.property.ambient == 1.0
def test(self):
self.main()
def do(self):
############################################################
# Imports.
script = self.script
from mayavi.sources.vtk_file_reader import VTKFileReader
from mayavi.modules.outline import Outline
from mayavi.modules.grid_plane import GridPlane
############################################################
# Create a new scene and set up the visualization.
s = self.new_scene()
# Read a VTK (old style) data file.
r = VTKFileReader()
r.initialize(get_example_data('heart.vtk'))
script.add_source(r)
# Create an outline for the data.
o = Outline()
script.add_module(o)
# Create three simple grid plane modules.
# First normal to 'x' axis.
gp1 = GridPlane()
script.add_module(gp1)
# Second normal to 'y' axis.
gp2 = GridPlane()
# We'll test how robust things are by setting attributes
# *before* we add it to the scene.
gp2.grid_plane.axis = 'y'
gp2.grid_plane.position = 16
script.add_module(gp2)
# Third normal to 'z' axis.
gp3 = GridPlane()
script.add_module(gp3)
gp3.grid_plane.axis = 'z'
gp3.grid_plane.position = 6
for gp in (gp1, gp2, gp3):
gp.actor.property.trait_set(ambient=1.0)
# Set the scene to an isometric view.
s.scene.isometric_view()
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
self.check()
############################################################
# Test if the MayaVi2 visualization can be deepcopied.
# Pop the source object.
source = s.children.pop()
# Add it back to see if that works without error.
s.children.append(source)
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
self.check()
# If we have come this far, we are golden!
if __name__ == "__main__":
t = TestGridPlane()
t.test()
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