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#!/usr/bin/env mayavi2
"""This script demonstrates how one can script Mayavi's core API to display
streamlines and an iso surface.
"""
# Author: Prabhu Ramachandran <prabhu_r@users.sf.net>
# Copyright (c) 2005-2007, Enthought, Inc.
# License: BSD Style.
# Standard library imports
from os.path import join, abspath, dirname
# Enthought library imports
from mayavi.scripts import mayavi2
from mayavi.sources.vtk_xml_file_reader import VTKXMLFileReader
from mayavi.sources.vrml_importer import VRMLImporter
from mayavi.modules.outline import Outline
from mayavi.modules.streamline import Streamline
from mayavi.modules.iso_surface import IsoSurface
def setup_data(fname):
"""Given a VTK XML file name `fname`, this creates a mayavi2
reader for it and adds it to the pipeline. It returns the reader
created.
"""
r = VTKXMLFileReader()
r.initialize(fname)
mayavi.add_source(r)
return r
def show_vrml(fname):
"""Given a VRML file name it imports it into the scene.
"""
r = VRMLImporter()
r.initialize(fname)
mayavi.add_source(r)
return r
def streamline():
"""Sets up the mayavi pipeline for the visualization.
"""
# Create an outline for the data.
o = Outline()
mayavi.add_module(o)
s = Streamline(streamline_type='tube')
mayavi.add_module(s)
s.stream_tracer.integration_direction = 'both'
s.seed.widget.center = 3.5, 0.625, 1.25
s.module_manager.scalar_lut_manager.show_scalar_bar = True
i = IsoSurface()
mayavi.add_module(i)
i.contour.contours[0] = 550
i.actor.property.opacity = 0.5
@mayavi2.standalone
def main():
mayavi.new_scene()
data_dir = mayavi2.get_data_dir(dirname(abspath(__file__)))
vrml_fname = join(data_dir, 'room_vis.wrl')
r = show_vrml(vrml_fname)
fname = join(data_dir, 'fire_ug.vtu')
r = setup_data(fname)
streamline()
if __name__ == '__main__':
main()
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