"""
This module shows a grid plane of the given input structured,
rectilinear or structured points grid with the scalar data either as a
color map or as contour lines. This works only for structured grid,
structured point and rectilinear grid data. Note that one can either
specify a total number of contours between the minimum and maximum
values by entering a single integer or specify the individual contours
by specifying a Python list/tuple in the GUI.
This code is distributed under the conditions of the BSD license. See
LICENSE.txt for details.
Copyright (c) 2001-2003, Prabhu Ramachandran.
"""
__author__ = "Prabhu Ramachandran <prabhu_r@users.sf.net>"
__version__ = "$Revision: 1.12 $"
__date__ = "$Date: 2005/08/02 18:30:13 $"
import Base.Objects, Common
import Tkinter, tkColorChooser
import vtk
import vtkPipeline.vtkMethodParser
debug = Common.debug
def set_extents (plane, lst):
debug ("In set_extents ()")
plane.SetExtent (lst[0], lst[1], lst[2], lst[3], lst[4], lst[5])
class ContourGridPlane (Base.Objects.Module):
""" This module shows a grid plane of the given input structured,
rectilinear or structured points grid with the scalar data either
as a color map or as contour lines. This works only for
structured grid, structured point and rectilinear grid data. Note
that one can either specify a total number of contours between the
minimum and maximum values by entering a single integer or specify
the individual contours by specifying a Python list/tuple in the
GUI."""
def __init__ (self, mod_m):
debug ("In ContourGridPlane::__init__ ()")
Common.state.busy ()
Base.Objects.Module.__init__ (self, mod_m)
self.act = None
out = self.mod_m.GetOutput ()
if out.IsA('vtkStructuredGrid'):
self.plane = vtk.vtkStructuredGridGeometryFilter ()
elif out.IsA ('vtkStructuredPoints') or out.IsA('vtkImageData'):
if hasattr (vtk, 'vtkImageDataGeometryFilter'):
self.plane = vtk.vtkImageDataGeometryFilter ()
else:
self.plane = vtk.vtkStructuredPointsGeometryFilter ()
elif out.IsA ('vtkRectilinearGrid'):
self.plane = vtk.vtkRectilinearGridGeometryFilter ()
else:
msg = "This module does not support the %s dataset."%(out.GetClassName())
raise Base.Objects.ModuleException, msg
self.cont_fil = vtk.vtkContourFilter ()
self.mapper = self.map = vtk.vtkPolyDataMapper ()
self.actor = self.act = vtk.vtkActor ()
self._initialize ()
self._gui_init ()
self.renwin.Render ()
Common.state.idle ()
def __del__ (self):
debug ("In ContourGridPlane::__del__ ()")
if self.act:
self.renwin.remove_actors (self.act)
self.renwin.Render ()
def _initialize (self):
debug ("In ContourGridPlane::_initialize ()")
self.map.SetLookupTable (self.mod_m.get_scalar_lut ())
self.data_range = self.mod_m.get_scalar_data_range ()
self.map.SetScalarRange (self.data_range)
data_out = self.mod_m.GetOutput ()
dim = data_out.GetDimensions ()
self.dim = [dim[0] -1, dim[1] -1, dim[2] -1]
self.plane.SetInput (data_out)
self.map.SetInput (self.plane.GetOutput ())
self.act.SetMapper (self.map)
self.act.GetProperty ().SetColor (*Common.config.fg_color)
self.act.GetProperty ().SetLineWidth (4)
self.act.GetProperty ().BackfaceCullingOff ()
self.act.GetProperty ().FrontfaceCullingOff ()
self.renwin.add_actors (self.act)
# used for the pipeline browser
self.pipe_objs = self.act
def _gui_init (self):
debug ("In ContourGridPlane::_gui_init ()")
self.axis_var = Tkinter.IntVar ()
self.slider = None
self.slider_pos = 0
self.axis_var.set (0)
self.change_axis ()
self.root = None
self._contour_init ()
self._auto_sweep_init ()
self.sweep_step.set (1)
def _contour_init (self):
debug ("In ContourGridPlane::_contour_init ()")
Base.Objects.Module._contour_init (self)
self.contour_on.set (0)
self.linew_var.set (self.act.GetProperty ().GetLineWidth ())
self.n_cnt.set ("10")
dr = self.mod_m.get_scalar_data_range ()
self.min_cnt.set (dr[0])
self.max_cnt.set (dr[1])
def SetInput (self, source):
debug ("In ContourGridPlane::SetInput ()")
Common.state.busy ()
self.plane.SetInput (source)
dim = source.GetDimensions ()
self.dim = [dim[0] -1, dim[1] -1, dim[2] -1]
dr = self.mod_m.get_scalar_data_range ()
self.config_extents()
if (dr[0] != self.data_range[0]) or (dr[1] != self.data_range[1]):
self.map.SetScalarRange (dr)
self.data_range = dr
self.min_cnt.set (dr[0])
self.max_cnt.set (dr[1])
self.change_contour ()
Common.state.idle ()
def save_config (self, file):
debug ("In ContourGridPlane::save_config ()")
file.write ("%d, %d, %d, %s, %f, %f\n"%(self.axis_var.get (),
self.slider_pos,
self.contour_on.get (),
self.n_cnt.get (),
self.min_cnt.get (),
self.max_cnt.get ()))
p = vtkPipeline.vtkMethodParser.VtkPickler ()
for obj in (self.plane, self.cont_fil, self.map, self.act,
self.act.GetProperty ()):
p.dump (obj, file)
def load_config (self, file):
debug ("In ContourGridPlane::load_config ()")
a, pos, cnt_on, n_cnt, min_cnt, max_cnt = eval (file.readline ())
self.axis_var.set (a)
self.slider_pos = pos
self.contour_on.set (cnt_on)
self.n_cnt.set (str(n_cnt))
self.min_cnt.set (min_cnt)
self.max_cnt.set (max_cnt)
p = vtkPipeline.vtkMethodParser.VtkPickler ()
if self.plane.GetClassName () == 'vtkImageDataGeometryFilter':
p.load (self.plane, file, 'vtkStructuredPointsGeometryFilter')
else:
p.load (self.plane, file, 'vtkImageDataGeometryFilter')
for obj in (self.cont_fil, self.map, self.act,
self.act.GetProperty ()):
p.load (obj, file)
self.config_extents ()
self.do_contour ()
def config_changed (self):
debug ("In ContourGridPlane::config_changed ()")
self.act.GetProperty ().SetColor(*Common.config.fg_color)
def make_main_gui (self):
debug ("In ContourGridPlane::make_main_gui ()")
frame = Tkinter.Frame (self.root, relief='ridge', bd=2)
frame.pack (side='top', fill='both', expand=1)
txt = ("X-Axis", "Y-Axis", "Z-Axis")
#self.axis_on_but = []
for i in range (3):
b = Tkinter.Radiobutton (frame, text=txt[i],
variable=self.axis_var,
value=i, command=self.change_axis)
b.grid (row=i, column=0)
#self.axis_on_but.append (b)
val = self.dim[self.axis_var.get ()]
self.slider = Tkinter.Scale (frame, label="Position", from_=0,
to=val, length="8c",
orient='horizontal')
self.slider.set (self.slider_pos)
self.slider.grid (row=3, column=0, pady=3)
self.slider.bind ("<ButtonRelease>", self.change_slider)
self.make_actor_gui (color=0, scalar=0, representation=0)
self.make_contour_gui ()
self.make_auto_sweep_gui ()
def config_extents (self):
debug ("In ContourGridPlane::config_extents ()")
Common.state.busy ()
i = self.axis_var.get ()
dim = self.dim
extents = [0, dim[0], 0, dim[1], 0, dim[2]]
extents[2*i] = self.slider_pos
extents[2*i+1] = self.slider_pos
set_extents (self.plane, extents)
self.renwin.Render ()
Common.state.idle ()
def change_axis (self, event=None):
debug ("In ContourGridPlane::change_axis ()")
i = self.axis_var.get ()
if self.slider:
self.slider.config (from_=0, to=self.dim[i])
self.config_extents ()
def change_slider (self, event=None):
debug ("In ContourGridPlane::change_slider ()")
val = self.slider.get ()
self.slider_pos = val
self.config_extents ()
def do_contour (self, event=None):
debug ("In ContourGridPlane::do_contour ()")
Common.state.busy ()
if self.contour_on.get ():
if not self.mod_m.get_scalar_data_name ():
self.contour_on.set (0)
msg = "Warning: No scalar data present to contour!"
Common.print_err (msg)
return
self.cont_fil.SetInput (self.plane.GetOutput ())
self.map.SetInput (self.cont_fil.GetOutput ())
else:
self.map.SetInput (self.plane.GetOutput ())
self.change_contour ()
Common.state.idle ()
def change_contour (self, event=None):
debug ("In ContourGridPlane::change_contour ()")
Common.state.busy ()
min_cnt = self.min_cnt.get ()
max_cnt = self.max_cnt.get ()
if max_cnt < min_cnt:
msg = "Error: Max. contour less than min. contour. "\
"Setting to defaults."
debug (msg)
dr = self.data_range
min_cnt, max_cnt = dr[0], dr[1]
self.min_cnt.set (min_cnt)
self.max_cnt.set (max_cnt)
n_cnt = eval (self.n_cnt.get ())
auto = 1
if hasattr(n_cnt, "__getitem__"):
auto = 0
if self.contour_on.get ():
if auto:
self.cont_fil.GenerateValues (n_cnt, min_cnt, max_cnt)
else:
self.cont_fil.SetNumberOfContours(len(n_cnt))
for i in range(len(n_cnt)):
self.cont_fil.SetValue(i, n_cnt[i])
self.cont_fil.Update ()
self.renwin.Render ()
Common.state.idle ()
def do_sweep (self, event=None):
debug ("In ContourGridPlane::do_sweep ()")
if self.sweep_var.get ():
val = int (1000*self.sweep_delay.get ())
self.root.after (val, self.update_sweep)
def update_sweep (self):
debug ("In ContourGridPlane::update_sweep ()")
if self.sweep_var.get ():
d_pos = self.sweep_step.get ()
pos = self.slider_pos + d_pos
if (d_pos > 0) and (pos > self.dim[self.axis_var.get ()]):
pos = 0
elif (d_pos < 0) and (pos < 0):
pos = self.dim[self.axis_var.get ()]
self.slider.set (pos)
self.change_slider ()
val = int (1000*self.sweep_delay.get ())
self.root.after (val, self.update_sweep)
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