DistancePolyDataFilter
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DistancePolyDataFilter.py
#!/usr/bin/env python3
from dataclasses import dataclass
from pathlib import Path
# noinspection PyUnresolvedReferences
import vtkmodules.vtkInteractionStyle
# noinspection PyUnresolvedReferences
import vtkmodules.vtkRenderingOpenGL2
from vtkmodules.vtkCommonColor import vtkNamedColors
from vtkmodules.vtkFiltersCore import vtkCleanPolyData
from vtkmodules.vtkFiltersGeneral import vtkDistancePolyDataFilter
from vtkmodules.vtkFiltersSources import (
vtkSphereSource
)
from vtkmodules.vtkIOGeometry import (
vtkBYUReader,
vtkOBJReader,
vtkSTLReader
)
from vtkmodules.vtkIOLegacy import vtkPolyDataReader
from vtkmodules.vtkIOPLY import vtkPLYReader
from vtkmodules.vtkIOXML import vtkXMLPolyDataReader
from vtkmodules.vtkInteractionWidgets import (
vtkScalarBarRepresentation,
vtkScalarBarWidget
)
from vtkmodules.vtkRenderingAnnotation import vtkScalarBarActor
from vtkmodules.vtkRenderingCore import (
vtkActor,
vtkPolyDataMapper,
vtkRenderWindow,
vtkRenderWindowInteractor,
vtkRenderer,
vtkTextProperty
)
def get_program_parameters():
import argparse
description = 'Compute the distance function from one vtkPolyData to another.'
epilogue = '''
'''
parser = argparse.ArgumentParser(description=description, epilog=epilogue,
formatter_class=argparse.RawDescriptionHelpFormatter)
parser.add_argument('filename1', default=None, nargs='?', help='Enter the first polydata file name.')
parser.add_argument('filename2', default=None, nargs='?', help='Enter the second polydata filename.')
args = parser.parse_args()
return args.filename1, args.filename2
def main():
file_name1, file_name2 = get_program_parameters()
input1 = None
input2 = None
if file_name1 and file_name2:
input1 = read_poly_data(file_name1)
input2 = read_poly_data(file_name1)
if input1 is None or input2 is None:
sphere_source1 = vtkSphereSource(center=(1, 0, 0), phi_resolution=21, theta_resolution=21)
input1 = sphere_source1.update().output
sphere_source2 = vtkSphereSource(phi_resolution=21, theta_resolution=21)
input2 = sphere_source2.update().output
colors = vtkNamedColors()
clean1 = vtkCleanPolyData(input_data=input1)
clean2 = vtkCleanPolyData(input_data=input2)
distance_filter = vtkDistancePolyDataFilter()
distance_filter.input_connection = (0, clean1.output_port)
distance_filter.input_connection = (1, clean2.output_port)
distance_filter.update()
scalar_range = distance_filter.output.point_data.scalars.range
mapper = vtkPolyDataMapper(scalar_range=scalar_range)
distance_filter >> mapper
actor = vtkActor(mapper=mapper)
scalar_bar_properties = ScalarBarProperties()
scalar_bar_properties.lut = mapper.lookup_table
scalar_bar_properties.orientation = True
scalar_bar_properties.title_text = 'Distance'
scalar_bar_properties.number_of_labels = 4
text_property = vtkTextProperty(color=colors.GetColor3d('MidnightBlue'), bold=True, italic=True, shadow=True,
font_size=16,
justification=TextProperty.Justification.VTK_TEXT_LEFT)
label_text_property = vtkTextProperty(color=colors.GetColor3d('MidnightBlue'), bold=True, italic=True, shadow=True,
font_size=12,
justification=TextProperty.Justification.VTK_TEXT_LEFT)
renderer = vtkRenderer(gradient_background=True, background=colors.GetColor3d('Silver'),
background2=colors.GetColor3d('Gold'))
ren_win = vtkRenderWindow(size=(600, 500), window_name='DistancePolyDataFilter')
ren_win.AddRenderer(renderer)
ren_win_interactor = vtkRenderWindowInteractor()
ren_win_interactor.render_window = ren_win
renderer.AddActor(actor)
scalar_bar_widget = make_scalar_bar_widget(scalar_bar_properties, text_property, label_text_property,
ren_win_interactor)
ren_win.Render()
scalar_bar_widget.On()
ren_win_interactor.Start()
def read_poly_data(file_name):
if not file_name:
print(f'No file name.')
return None
valid_suffixes = ['.g', '.obj', '.stl', '.ply', '.vtk', '.vtp']
path = Path(file_name)
ext = None
if path.suffix:
ext = path.suffix.lower()
if path.suffix not in valid_suffixes:
print(f'No reader for this file suffix: {ext}')
return None
reader = None
if ext == '.ply':
reader = vtkPLYReader(file_name=file_name)
elif ext == '.vtp':
reader = vtkXMLPolyDataReader(file_name=file_name)
elif ext == '.obj':
reader = vtkOBJReader(file_name=file_name)
elif ext == '.stl':
reader = vtkSTLReader(file_name=file_name)
elif ext == '.vtk':
reader = vtkPolyDataReader(file_name=file_name)
elif ext == '.g':
reader = vtkBYUReader(file_name=file_name)
if reader:
reader.update()
poly_data = reader.output
return poly_data
else:
return None
class ScalarBarProperties:
"""
The properties needed for scalar bars.
"""
named_colors = vtkNamedColors()
lut = None
# These are in pixels
maximum_dimensions = {'width': 100, 'height': 260}
title_text = '',
number_of_labels: int = 5
# Orientation vertical=True, horizontal=False
orientation: bool = True
# Horizontal and vertical positioning
position_v = {'point1': (0.85, 0.1), 'point2': (0.1, 0.7)}
position_h = {'point1': (0.10, 0.1), 'point2': (0.7, 0.1)}
def make_scalar_bar_widget(scalar_bar_properties, text_property, label_text_property, interactor):
"""
Make a scalar bar widget.
:param scalar_bar_properties: The lookup table, title name, maximum dimensions in pixels and position.
:param text_property: The properties for the title.
:param label_text_property: The properties for the labels.
:param interactor: The vtkInteractor.
:return: The scalar bar widget.
"""
sb_actor = vtkScalarBarActor(lookup_table=scalar_bar_properties.lut, title=scalar_bar_properties.title_text,
unconstrained_font_size=False, number_of_labels=scalar_bar_properties.number_of_labels,
label_text_property=label_text_property, title_text_property=text_property
)
sb_rep = vtkScalarBarRepresentation(enforce_normalized_viewport_bounds=True,
orientation=scalar_bar_properties.orientation)
# Set the position
sb_rep.position_coordinate.SetCoordinateSystemToNormalizedViewport()
sb_rep.position2_coordinate.SetCoordinateSystemToNormalizedViewport()
if scalar_bar_properties.orientation:
sb_rep.position_coordinate.value = scalar_bar_properties.position_v['point1']
sb_rep.position2_coordinate.value = scalar_bar_properties.position_v['point2']
else:
sb_rep.position_coordinate.value = scalar_bar_properties.position_h['point1']
sb_rep.position2_coordinate.value = scalar_bar_properties.position_h['point2']
widget = vtkScalarBarWidget(representation=sb_rep, scalar_bar_actor=sb_actor, interactor=interactor, enabled=True)
return widget
@dataclass(frozen=True)
class TextProperty:
@dataclass(frozen=True)
class Justification:
VTK_TEXT_LEFT: int = 0
VTK_TEXT_CENTERED: int = 1
VTK_TEXT_RIGHT: int = 2
@dataclass(frozen=True)
class VerticalJustification:
VTK_TEXT_BOTTOM: int = 0
VTK_TEXT_CENTERED: int = 1
VTK_TEXT_TOP: int = 2
if __name__ == '__main__':
main()