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(dirname(enthought.mayavi.__file__),
'examples', 'data', '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.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.
g.glyph.glyph_source = g.glyph.glyph_list[1]
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.
"""
mayavi.new_scene()
r = VTKXMLFileReader()
r.initialize(fname)
mayavi.add_source(r)
return r
def contour():
"""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 scene.
mayavi.new_scene()
# Read a VTK (old style) data file.
r = VTKFileReader()
r.initialize(join(dirname(enthought.mayavi.__file__),
'examples', 'data', 'heart.vtk'))
mayavi.add_source(r)
# Create an outline for the data.
o = Outline()
mayavi.add_module(o)
# Create three simple grid plane modules.
# First normal to 'x' axis.
gp = GridPlane()
mayavi.add_module(gp)
# Second normal to 'y' axis.
gp = GridPlane()
mayavi.add_module(gp)
gp.grid_plane.axis = 'y'
# Third normal to 'z' axis.
gp = GridPlane()
mayavi.add_module(gp)
gp.grid_plane.axis = 'z'
# Create one ContourGridPlane normal to the 'x' axis.
cgp = ContourGridPlane()
mayavi.add_module(cgp)
# Set the position to the middle of the data.
cgp.grid_plane.position = 15
# Another with filled contours normal to 'y' axis.
cgp = ContourGridPlane()
mayavi.add_module(cgp)
# Set the axis and position to the middle of the data.
cgp.grid_plane.axis = 'y'
cgp.grid_plane.position = 15
cgp.contour.filled_contours = True
# An isosurface module.
iso = IsoSurface(compute_normals=True)
mayavi.add_module(iso)
iso.contour.contours = [220.0]
# An interactive scalar cut plane.
cp = ScalarCutPlane()
mayavi.add_module(cp)
cp.implicit_plane.normal = 0,0,1
def view_numpy():
"""Example showing how to view a 3D numpy array in mayavi2.
"""
# 'mayavi' is always defined on the interpreter.
mayavi.new_scene()
# Make the data and add it to the pipeline.
data = make_data()
src = ArraySource(transpose_input_array=False)
src.scalar_data = data
mayavi.add_source(src)
# Visualize the data.
o = Outline()
mayavi.add_module(o)
ipw = ImagePlaneWidget()
mayavi.add_module(ipw)
ipw.module_manager.scalar_lut_manager.show_scalar_bar = True
ipw_y = ImagePlaneWidget()
mayavi.add_module(ipw_y)
ipw_y.ipw.plane_orientation = 'y_axes'
"""Add a TVTK data object `tvtk_data` to the mayavi pipleine.
"""
d = VTKDataSource()
d.data = tvtk_data
mayavi.add_source(d)
def surf_regular():
"""Now visualize the data as done in mlab.
"""
w = WarpScalar()
mayavi.add_filter(w)
o = Outline()
s = Surface()
mayavi.add_module(o)
mayavi.add_module(s)
if __name__ == '__main__':
mayavi.new_scene()
d = make_data()
add_data(d)
surf_regular()
# <markdowncell>
# examples_attachments/surf_regular_mlab.png
#
# * * * * *
#
# CategoryCookbook
#