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vtk_utils.py
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vtk_utils.py
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import vtk
from vtk.util import numpy_support
import math
from tqdm import tqdm, trange
import numpy as np
import matplotlib
try:
matplotlib.rcParams.update({
"pgf.texsystem": "pdflatex",
'font.family': 'serif',
'text.usetex': True,
'pgf.rcfonts': False,
})
except:
print('Could not Latex-ify labels ')
print('Current backend', matplotlib.pyplot.get_backend())
conflicting_backends = ['QtAgg', 'Qt5Agg']
if matplotlib.pyplot.get_backend() in conflicting_backends:
try:
matplotlib.use('GTK3Agg')
print('backend set to GTK3Agg to avoid conflict with VTK plot')
except:
print('Tried to switch to GTK3, failed')
print('Currently using:', matplotlib.get_backend())
def set_camera(camera, position):
pos_dict = {'N': np.array([0, 1, 0]),
'E': np.array([1, 0, 0]),
'S': np.array([0, -1, 0]),
'W': np.array([-1, 0, 0]),
'Top': np.array([0, 0, 1]),
'Bottom': np.array([0, 0, -1]),
'NE': np.array([0.707, 0.707, 0]),
'NW': np.array([0.707, -0.707, 0]),
'SE': np.array([-0.707, 0.707, 0]),
'SW': np.array([-0.707, -0.707, 0])}
pos = np.asarray(camera.GetPosition())
cent = np.asarray(camera.GetFocalPoint())
# print(dir(camera))
rad = np.sqrt(np.sum(np.square(pos-cent)))
new_pos = pos_dict[position]*rad
camera.SetPosition(new_pos)
up = np.asarray([0, 0, 1])
# camera.SetViewUp(pos_dict[position])
camera.SetViewUp(up)
class MyInteractorStyle(vtk.vtkInteractorStyleTrackballCamera):
"""[VTK class definitions to allow for more natural camera movement (trackpad style)
and keybindings for extra functionality (camera movement, printscreens etc.)]
Arguments:
expects: renderWindowInteractor, render_camera, renderWindow
"""
def __init__(self, parent, camera, renderer):
self.parent = parent
self.camera = camera
self.renderer = renderer
self.verbose = False
self.auto_up = True
self.AddObserver("MiddleButtonPressEvent", self.middle_button_press_event)
self.AddObserver("MiddleButtonReleaseEvent", self.middle_button_release_event)
self.AddObserver("LeftButtonPressEvent", self.left_button_press_event)
self.AddObserver("LeftButtonReleaseEvent", self.left_button_release_event)
self.AddObserver("KeyPressEvent", self.keyPressEvent)
# self.AutoAdjustCameraClippingRange(True)
def camera_zoom_in(self, step=2):
old = np.asarray(self.camera.GetPosition())
new = old *0.9
if self.auto_up:
up = np.asarray([0, 0, 1])
self.camera.SetViewUp(up)
self.camera.SetPosition(tuple(new))
# print(dir(self.renderer))
# self.renderer.ResetCameraClippingRange()
self.renderer.Render()
return
def camera_zoom_out(self, step=2):
old = np.asarray(self.camera.GetPosition())
new = old * 1.1
if self.auto_up:
up = np.asarray([0, 0, 1])
self.camera.SetViewUp(up)
self.camera.SetPosition(tuple(new))
# self.renderer.ResetCameraClippingRange()
self.renderer.Render()
return
def rotate_clockwise(self, step=2):
old = list(self.camera.GetPosition())
x_coord = old[0]
y_coord = old[1]
if x_coord >= 0:
if y_coord >= 0:
x_sign = -1
y_sign = 1
else:
x_sign = 1
y_sign = 1
elif y_coord >= 0:
x_sign = -1
y_sign = -1
else:
x_sign = 1
y_sign = -1
scale = 0.05
del_x = np.abs(y_coord) * scale * x_sign
del_y = np.abs(x_coord) * scale * y_sign
hypot_1 = math.hypot(old[0], old[1])
new_x = old[0] + del_x
new_y = old[1] + del_y
hypot_2 = math.hypot(new_x, new_y)
rescale = hypot_1/hypot_2
new = old
new[0] = (new_x * rescale)
new[1] = (new_y * rescale)
if self.auto_up:
up = np.asarray([0, 0, 1])
self.camera.SetViewUp(up)
self.camera.SetPosition(tuple(new))
self.renderer.Render()
return
def rotate_anticlockwise(self):
old = list(self.camera.GetPosition())
x_coord = old[0]
y_coord = old[1]
if x_coord > 0:
if y_coord > 0:
x_sign = 1
y_sign = -1
else:
x_sign = -1
y_sign = -1
elif y_coord > 0:
x_sign = 1
y_sign = 1
else:
x_sign = -1
y_sign = 1
scale = 0.05
del_x = np.abs(y_coord) * scale * x_sign
del_y = np.abs(x_coord) * scale * y_sign
hypot_1 = math.hypot(old[0], old[1])
new_x = old[0] + del_x
new_y = old[1] + del_y
hypot_2 = math.hypot(new_x, new_y)
rescale = hypot_1/hypot_2
new = old
new[0] = (new_x * rescale)
new[1] = (new_y * rescale)
if self.auto_up:
up = np.asarray([0, 0, 1])
self.camera.SetViewUp(up)
self.camera.SetPosition(tuple(new))
self.renderer.Render()
return
def rotate_upclockwise(self):
old = list(self.camera.GetPosition())
x_coord = old[0]
y_coord = old[1]
# print(x_coord, y_coord)
d_coord = math.hypot(x_coord, y_coord)
z_coord = old[2]
if z_coord >= 0:
z_sign = 1
d_sign = -1
else:
z_sign = 1
d_sign = 1
scale = 0.05
del_z = np.abs(d_coord) * scale * z_sign
del_d = np.abs(z_coord) * scale * d_sign
hypot_1 = math.hypot(d_coord, z_coord)
new_z = z_coord + del_z
new_d = d_coord + del_d
hypot_2 = math.hypot(new_z, new_d)
rescale = hypot_1/hypot_2
new = old
new[2] = (new_z * rescale)
new_d = (new_d * rescale)
rescale_2 = new_d/d_coord
new[0] = (x_coord * rescale_2)
new[1] = (y_coord * rescale_2)
if self.auto_up:
up = np.asarray([0, 0, 1])
self.camera.SetViewUp(up)
self.camera.SetPosition(tuple(new))
self.renderer.Render()
return
def rotate_downclockwise(self):
old = list(self.camera.GetPosition())
x_coord = old[0]
y_coord = old[1]
d_coord = math.hypot(x_coord, y_coord)
z_coord = old[2]
if z_coord >= 0:
z_sign = -1
d_sign = +1
else:
z_sign = -1
d_sign = -1
scale = 0.05
del_z = np.abs(d_coord) * scale * z_sign
del_d = np.abs(z_coord) * scale * d_sign
hypot_1 = math.hypot(d_coord, z_coord)
new_z = z_coord + del_z
new_d = d_coord + del_d
hypot_2 = math.hypot(new_z, new_d)
rescale = hypot_1/hypot_2
new = old
new[2] = (new_z * rescale)
new_d = (new_d * rescale)
rescale_2 = new_d/d_coord
new[0] = (x_coord * rescale_2)
new[1] = (y_coord * rescale_2)
if self.auto_up:
up = np.asarray([0, 0, 1])
self.camera.SetViewUp(up)
self.camera.SetPosition(tuple(new))
self.renderer.Render()
return
def screenshot(self):
w2if = vtk.vtkWindowToImageFilter()
# print(dir(w2if))
w2if.SetScale(4)
w2if.SetInput(self.renderer)
w2if.Update()
writer = vtk.vtkPNGWriter()
writer.SetFileName("screenshot.png")
writer.SetInputData(w2if.GetOutput())
writer.Write()
def keyPressEvent(self, obj, event):
key = str(self.parent.GetKeySym())
# check here for available keypresses supported by Qt & VTK
# https://github.com/Kitware/VTK/blob/master/GUISupport/Qt/QVTKInteractorAdapter.cxx
if key == 'Left':
self.rotate_clockwise()
if key == 'Right':
self.rotate_anticlockwise()
if key == 'Up':
self.rotate_upclockwise()
if key == 'Down':
self.rotate_downclockwise()
if key == 'c':
self.screenshot()
if key == 'equal':
self.camera_zoom_in()
if key == 'minus':
self.camera_zoom_out()
if key == 's':
self.export_geometry()
return
def export_geometry(self, savename='export.gltf', verbose=True):
if verbose:
print('writing GLTF to %s' % savename)
try:
exporter = vtk.vtkGLTFExporter()
except AttributeError:
print('Gltf exporting is not supported in your version of VTK, try updating')
exporter.SetInput(self.parent.GetRenderWindow())
exporter.InlineDataOn()
exporter.SetFileName(savename)
exporter.Update()
exporter.Write()
if verbose:
print('File written')
def left_button_press_event(self, obj, event):
if self.verbose:
print("left Button pressed")
self.OnLeftButtonDown()
return
def left_button_release_event(self, obj, event):
if self.verbose:
print("left Button released")
self.OnLeftButtonUp()
return
def middle_button_press_event(self, obj, event):
if self.verbose:
print("Middle Button pressed")
self.OnMiddleButtonDown()
return
def middle_button_release_event(self, obj, event):
if self.verbose:
print("Middle Button released")
self.OnMiddleButtonUp()
return
def make_colormap(c_range=(0,1), color='viridis', cnum=100, invert=False, verbose=False, dark_mode=False):
# Possible values are:
# Accent, Accent_r, Blues, Blues_r, BrBG, BrBG_r,
# BuGn, BuGn_r, BuPu, BuPu_r, CMRmap, CMRmap_r, Dark2, Dark2_r, GnBu,
# GnBu_r, Greens, Greens_r, Greys, Greys_r, OrRd, OrRd_r, Oranges, Oranges_r,
# PRGn, PRGn_r, Paired, Paired_r, Pastel1, Pastel1_r, Pastel2, Pastel2_r,
# PiYG, PiYG_r, PuBu, PuBuGn, PuBuGn_r, PuBu_r, PuOr, PuOr_r, PuRd, PuRd_r,
# Purples, Purples_r, RdBu, RdBu_r, RdGy, RdGy_r, RdPu, RdPu_r, RdYlBu,
# RdYlBu_r, RdYlGn, RdYlGn_r, Reds, Reds_r, Set1, Set1_r, Set2, Set2_r,
# Set3, Set3_r, Spectral, Spectral_r, Wistia, Wistia_r, YlGn, YlGnBu,
# YlGnBu_r, YlGn_r, YlOrBr, YlOrBr_r, YlOrRd, YlOrRd_r, afmhot, afmhot_r,
# autumn, autumn_r, binary, binary_r, bone, bone_r, brg, brg_r, bwr, bwr_r,
# cividis, cividis_r, cool, cool_r, coolwarm, coolwarm_r, copper, copper_r,
# cubehelix, cubehelix_r, flag, flag_r, gist_earth, gist_earth_r, gist_gray,
# gist_gray_r, gist_heat, gist_heat_r, gist_ncar, gist_ncar_r, gist_rainbow,
# gist_rainbow_r, gist_stern, gist_stern_r, gist_yarg, gist_yarg_r, gnuplot,
# gnuplot2, gnuplot2_r, gnuplot_r, gray, gray_r, hot, hot_r, hsv, hsv_r,
# inferno, inferno_r, jet, jet_r, magma, magma_r, nipy_spectral,
# nipy_spectral_r, ocean, ocean_r, pink, pink_r, plasma, plasma_r,
# prism, prism_r, rainbow, rainbow_r, seismic, seismic_r, spring,
# spring_r, summer, summer_r, tab10, tab10_r, tab20, tab20_r, tab20b,
# tab20b_r, tab20c, tab20c_r, terrain, terrain_r, twilight, twilight_r,
# twilight_shifted, twilight_shifted_r, viridis, viridis_r, winter, winter_r
if verbose:
if color is None:
print('No colormap supplied, defaulting to Viridis')
else:
print('Making colormap:', color)
if verbose:
print('Using Matplotlib color tables')
try:
mpl_data = matplotlib.cm.get_cmap(color)
except ValueError:
try:
color = color[5:]
print(color)
mpl_data = matplotlib.cm.get_cmap(color)
dark_mode = True
print('Using Dark Mode')
except ValueError:
mpl_data = matplotlib.cm.get_cmap('viridis')
cm_data = np.zeros([cnum, 3])
for i in range(cnum):
cm_data[i,:] = mpl_data(i/cnum)[0:3]
colormap = np.asarray(cm_data)
if dark_mode:
colormap = colormap * [0.1, 0.1, 0.1]
if invert:
if verbose:
print('Using inverted direction')
colormap = np.flip(colormap, axis=0)
scale = np.linspace(c_range[0], c_range[1], num=colormap.shape[0])
colormap = np.vstack([scale, colormap.T]).T
if verbose:
print('Colormap made')
return colormap
def make_LUT(colormap='viridis', invert=False, verbose=False, c_range=(0,1), nan_color=(1,0,0,1), scale_type='linear'):
colormap = make_colormap(c_range=c_range, color=colormap, invert=invert, verbose=verbose)
colorSeries = vtk.vtkColorSeries()
colorSeries.SetNumberOfColors(colormap.shape[0])
try:
for cnum, color in enumerate(colormap):
color = (255*color[1:4]).astype(int)
vcolor = vtk.vtkColor3ub(color)
colorSeries.SetColor(cnum, vcolor)
lut = vtk.vtkLookupTable()
colorSeries.BuildLookupTable(lut, colorSeries.ORDINAL)
lut.SetNanColor(nan_color)
except TypeError:
for cnum, color in enumerate(colormap):
color = (255*color[1:4]).astype(int)
vcolor = vtk.vtkColor3ub(color[0], color[1], color[2])
colorSeries.SetColor(cnum, vcolor)
lut = vtk.vtkLookupTable()
colorSeries.BuildLookupTable(lut, colorSeries.ORDINAL)
lut.SetNanColor(nan_color)
lut.SetRange(c_range)
if scale_type == 'linear':
lut.SetScaleToLinear()
elif scale_type == 'logarithmic':
lut.SetScaleToLog10()
return lut
def add_polydata(locations,
scalar_dict=None,
initial_key=None,
renderer=None,
glyph_type='cube',
glyph_scale=2,
fixed_voxel_size=True,
colormap='viridis',
opacity=1.0,
colors=None,
resolution=24,
verbose=False):
"""[Creates a polydata actor from a set of coordinates & scalars]
Arguments:
locations {[numpy array (N,3)]} -- [the locations of the points]
scalar_vals {[dictionary]} -- [the scalar values in a key:value dictionary]
Keyword Arguments:
glyph_type {str} -- [the shape of the glyph used, can be sphere] (default: {'cube'})
glyph_scale {int} -- [the default scale of the glyph] (default: {2})
fixed_voxel_size {bool} -- [bool if you want the glyphs to scale] (default: {True})
colormap {[type]} -- [colormap of the polydata] (default: {None})
opacity {float} -- [polydata opacity, use with caution as it affects rendering] (default: {1.0})
resolution {int} -- [the rendering resolution of the sphere glyph] (default: {6})
"""
if verbose:
print('Input shape:', locations.shape)
if np.ndim(locations) < 2:
print('input array appears to be 1D, shape:', locations.shape, 'size:', locations.size)
if locations.size == 3:
locations = locations.reshape([-1,3])
elif locations.size == 2:
locations = np.vstack([locations, 0])
locations = locations.reshape([-1,3])
else:
locations = locations[:3].reshape([-1,3])
if locations.shape[1] > 3:
print('3D point cloud expected, got', locations.shape)
locations = locations[:,:3]
print('Points truncated to', locations.shape)
elif locations.shape[1] == 2:
print('3D point cloud expected, got', locations.shape)
locations = np.hstack((locations, np.zeros((locations.shape[0],1))))
print('Points padded to', locations.shape)
points = vtk.vtkPoints()
points.SetData(numpy_support.numpy_to_vtk(locations.astype(np.float)))
# for location in locations:
# points.InsertNextPoint(location[0], location[1], location[2])
polydata = vtk.vtkPolyData()
polydata.SetPoints(points)
total_points = points.GetNumberOfPoints()
if scalar_dict is not None:
if isinstance(scalar_dict, np.ndarray):
if verbose:
print('array specified as scalars, shape', scalar_dict.shape, 'total points expected:', total_points)
scalar_array = scalar_dict
scalar_dict = dict()
if np.ndim(scalar_array) == 2:
# print('Array is 2D')
if scalar_array.shape[0] == total_points:
# print('scalar array is tall')
for s_num, scalar in enumerate(scalar_array.T):
# print(scalar.shape)
key_name = 'array_%i' % s_num
scalar_dict.update({key_name: scalar})
elif scalar_array.shape[1] == total_points:
# print('scalar array is wide')
for s_num, scalar in enumerate(scalar_array):
# print(scalar.shape)
key_name = 'array_%i' % s_num
scalar_dict.update({key_name: scalar})
elif np.ndim(scalar_array) == 1:
# print('Array is 1D')
scalar_dict.update({'scalar_0':scalar_array})
# for scalar in scalar_array:
# print(scalar.shape)
else:
scalar_dict = dict({'value': np.zeros(locations.shape[0])})
# scalar_dict = dict({'value': np.zeros(locations.shape[0])})
else:
scalar_dict = dict({'value': np.zeros(locations.shape[0])})
for key_name in scalar_dict.keys():
# print('Key name', key_name)
scalar_color = vtk.vtkFloatArray()
scalar_color.SetNumberOfComponents(1)
scalar_color.SetName(key_name)
scalar_vals = scalar_dict[key_name]
# print(np.nanmin(scalar_vals), np.nanmax(scalar_vals))
for pointId in range(total_points):
try:
scalar_color.InsertNextValue(scalar_vals[pointId])
except:
scalar_color.InsertNextValue(0)
break
polydata.GetPointData().AddArray(scalar_color)
# print('saved_keyname', key_name)
polydata.GetPointData().SetScalars(scalar_color)
polydata.GetPointData().SetActiveScalars(key_name)
if colors is not None:
Colors = vtk.vtkUnsignedCharArray()
Colors.SetNumberOfComponents(3)
Colors.SetName("Colors")
if isinstance(colors, str):
print('Singular named color for set assumed, google \'VTK named colors\' for options')
if colors[:5] == 'dark_':
print('Dark mode enabled')
colors = colors[5:]
single_color = (np.asarray(vtk.vtkNamedColors().GetColor3d(colors)) * 0.3)
else:
single_color = vtk.vtkNamedColors().GetColor3d(colors)
single_color = np.asarray((single_color[0], single_color[1], single_color[2] )) * 255
# print(single_color)
for _ in range(total_points):
Colors.InsertNextTuple3(*single_color)
elif np.ndim(colors) == 1:
print('Singular RGB [0-255] color triple for set assumed')
for _ in range(total_points):
Colors.InsertNextTuple3(*colors)
else:
print('List of RGB [0-255] color triples for set assumed')
for color in colors:
# print(color)
Colors.InsertNextTuple3(*color)
polydata.GetPointData().SetScalars(Colors)
polydata.Modified()
if initial_key is not None:
scalar_color = vtk.vtkFloatArray()
scalar_color.SetNumberOfComponents(1)
scalar_color.SetName(key_name)
scalar_vals = scalar_dict[initial_key]
for pointId in range(total_points):
try:
scalar_color.InsertNextValue(scalar_vals[pointId])
except:
scalar_color.InsertNextValue(0)
break
polydata.GetPointData().SetScalars(scalar_color)
if glyph_type == 'sphere':
glyphSource = vtk.vtkSphereSource()
glyphSource.SetPhiResolution(resolution)
glyphSource.SetThetaResolution(resolution)
elif glyph_type == 'tetrahedron':
glyphSource = vtk.vtkPlatonicSolidSource()
glyphSource.SetSolidTypeToTetrahedron()
elif glyph_type == 'octahedron':
glyphSource = vtk.vtkPlatonicSolidSource()
glyphSource.SetSolidTypeToOctahedron()
elif glyph_type == 'icosahedron':
glyphSource = vtk.vtkPlatonicSolidSource()
glyphSource.SetSolidTypeToIcosahedron()
elif glyph_type == 'dodecahedron':
glyphSource = vtk.vtkPlatonicSolidSource()
glyphSource.SetSolidTypeToDodecahedron()
else: # default to cube
glyphSource = vtk.vtkCubeSource()
glyph3D = vtk.vtkGlyph3D()
glyph3D.SetSourceConnection(glyphSource.GetOutputPort())
glyph3D.SetInputData(polydata)
if fixed_voxel_size:
if verbose:
print('Fixed voxel size')
glyph3D.SetScaleFactor(glyph_scale)
glyph3D.SetInputArrayToProcess(0, 0, 0, 0, 'RTData')
glyph3D.SetColorModeToColorByScalar()
else:
if verbose:
print('Scalar voxel size')
glyph3D.ClampingOff()
glyph3D.SetScaleModeToScaleByScalar()
# glyph3D.SetInputArrayToProcess(0, 0, 0, Colors, key_name)
glyph3D.SetScaleFactor(glyph_scale)
glyph3D.Update()
lut = make_LUT(colormap=colormap)
mapper = vtk.vtkPolyDataMapper()
mapper.SetInputConnection(glyph3D.GetOutputPort())
try:
mapper.SetScalarRange(np.nanmin(scalar_vals), np.nanmax(scalar_vals))
except ValueError:
mapper.SetScalarRange(0, 1)
mapper.SetLookupTable(lut)
actor = vtk.vtkActor()
actor.SetMapper(mapper)
actor.GetProperty().SetOpacity(opacity)
if renderer is None:
return actor # , mesh_actor, volume_test]
else:
renderer.AddActor(actor)
def add_polyhedron(vertices, faces, labels=None, offset=[0, 0, 0], scalars=None, secondary_offset=None, rotation=None, opacity=1.0, verbose=False, mesh_color='black', color_map='viridis', c_range=None, representation='surface', interpolate_scalars=True):
colors = vtk.vtkNamedColors()
points = vtk.vtkPoints()
visited = list()
narrowed_vertices = list()
if labels is not None:
if verbose:
print('assuming points need relabelling reduction')
for face in faces:
for input_vertex in face:
if input_vertex not in visited:
vertex = vertices[np.argwhere(labels == input_vertex), :].flatten() + offset
narrowed_vertices.append(vertex)
visited.append(input_vertex)
narrowed_vertices = np.asarray(narrowed_vertices)
visited = np.asarray(visited)
new_faces = list()
for face in faces:
new_face = [np.argwhere(visited == face[0]), np.argwhere(visited == face[1]), np.argwhere(visited == face[2])]
new_faces.append(new_face)
faces = np.squeeze(np.asarray(new_faces))
else:
narrowed_vertices = np.asarray(vertices) + offset
for vertex in narrowed_vertices:
points.InsertNextPoint(vertex[0], vertex[1], vertex[2])
cell_array = vtk.vtkCellArray()
if faces.shape[1] == 3:
for face in faces:
Triangle = vtk.vtkTriangle()
Triangle.GetPointIds().SetId(0,face[0])
Triangle.GetPointIds().SetId(1,face[1])
Triangle.GetPointIds().SetId(2,face[2])
cell_array.InsertNextCell(Triangle)
elif faces.shape[1] == 4:
for face in faces:
quad = vtk.vtkQuad()
quad.GetPointIds().SetId(0,face[0])
quad.GetPointIds().SetId(1,face[1])
quad.GetPointIds().SetId(2,face[2])
quad.GetPointIds().SetId(3,face[3])
cell_array.InsertNextCell(quad)
else:
for face in faces:
cell = vtk.vtkPolygon()
for p_num, point in enumerate(face):
cell.GetPointIds().SetId(p_num, point)
cell_array.InsertNextCell(cell)
polydata = vtk.vtkPolyData()
polydata.SetPoints(points)
polydata.SetPolys(cell_array)
# Create a mapper and actor
mapper = vtk.vtkDataSetMapper()
mapper.SetInputData(polydata)
actor = vtk.vtkActor()
actor.SetMapper(mapper)
actor.GetProperty().SetColor(colors.GetColor3d(mesh_color))
if scalars is not None:
if c_range is None:
c_range = (np.min(scalars), np.max(scalars))
lut = make_LUT(colormap=color_map, c_range=c_range, nan_color=(0,1,0,1))
actor.GetMapper().SetLookupTable(lut)
actor.GetMapper().SetScalarRange(c_range)
actor.GetMapper().GetInput().GetPointData().SetScalars(numpy_support.numpy_to_vtk(scalars))
actor.GetMapper().SetInterpolateScalarsBeforeMapping(interpolate_scalars)
actor.GetProperty().SetOpacity(opacity)
if representation == 'wireframe':
actor.GetProperty().SetRepresentationToWireframe()
return actor
def add_stl(filename,
renderer=None,
opacity=1.0,
specular=0.1,
ambient=0.0,
scale=(1, 1, 1),
translate=(0, 0, 0),
rotate=(0, 0, 0),
mesh_color="blue",
use_wireframe=False,
scale_then_translate=False,
smoothing_passes=0,
max_subdivisions=0
):
"""[Used to load in standard STL files and translate them]
Arguments:
filename {[string]} -- [the filename of the STL]
Keyword Arguments:
opacity {float} -- [opacity of the object] (default: {1.0})
scale {tuple} -- [x,y,z scale] (default: {(1, 1, 1)})
translate {tuple} -- [x,y,z shift] (default: {(0, 0, 0)})
rotate {tuple} -- [rotation in degrees] (default: {(0, 0, 0)})
mesh_color {str} -- [color of the mesh, taken from VTK colors] (default: {"blue"})
use_wireframe {bool} -- [renders the wireframe instead] (default: {False})
"""
colors = vtk.vtkNamedColors()
reader = vtk.vtkSTLReader()
reader.SetFileName(filename)
reader.Update()
transform = vtk.vtkTransform()
transform.RotateX(rotate[0])
transform.RotateY(rotate[1])
transform.RotateZ(rotate[2])
if scale_then_translate:
transform.Scale(scale)
transform.Translate(translate)
else:
transform.Translate(translate)
transform.Scale(scale)
transformFilter = vtk.vtkTransformPolyDataFilter()
transformFilter.SetInputConnection(reader.GetOutputPort())
transformFilter.SetTransform(transform)
transformFilter.Update()
if max_subdivisions > 0:
print('subdividing mesh, may take a while')
subdivider = vtk.vtkAdaptiveSubdivisionFilter()
subdivider.SetMaximumNumberOfPasses(max_subdivisions)
subdivider.SetInputConnection(transformFilter.GetOutputPort())
subdivider.Update()
transformFilter = subdivider
if smoothing_passes > 0:
smooth_loop = vtk.vtkSmoothPolyDataFilter()
smooth_loop.SetNumberOfIterations(smoothing_passes)
smooth_loop.SetRelaxationFactor(0.1)
smooth_loop.BoundarySmoothingOn()
smooth_loop.SetInputConnection(transformFilter.GetOutputPort())
smooth_loop.Update()
mapper = vtk.vtkPolyDataMapper()
mapper.SetInputConnection(smooth_loop.GetOutputPort())
else:
mapper = vtk.vtkPolyDataMapper()
mapper.SetInputConnection(transformFilter.GetOutputPort())
actor = vtk.vtkActor()
actor.SetMapper(mapper)
if mesh_color is not None:
if isinstance(mesh_color, str):
actor.GetProperty().SetColor(colors.GetColor3d(mesh_color))
else:
actor.GetProperty().SetColor(mesh_color[0], mesh_color[1], mesh_color[2])
actor.GetProperty().SetOpacity(opacity)
actor.GetProperty().SetSpecular(specular)
actor.GetProperty().SetSpecularPower(80.0)
actor.GetProperty().SetAmbient(ambient)
actor.GetProperty().SetInterpolationToGouraud()
if use_wireframe:
actor.GetProperty().SetRepresentationToWireframe()
if renderer is None:
return actor
else:
renderer.AddActor(actor)
def add_polygon(position=[0,0,0], vertices=None, polygon='hexagon', mesh_color='red', rotation_offset=0, opacity=1, verbose=True):
if vertices is None:
if verbose:
print('No custom vertices supplied, drawing', polygon, 'with center:', position, 'rotation:', rotation_offset)
polygon_dict = dict(triangle=3, square=4, pentagon=5, hexagon=6, heptagon=7, octagon=8, nonagon=9, decagon=10)
if polygon is not None:
segments = polygon_dict[polygon]
polygon_angle = 360/segments
vertices = np.zeros([segments, 3])
for wedge in range(segments):
vertex_angle = (wedge*polygon_angle) + rotation_offset
x_pos = math.sin(math.radians(vertex_angle)) + position[0]
y_pos = math.cos(math.radians(vertex_angle)) + position[1]
z_pos = position[2]
vertices[wedge, :] = [x_pos, y_pos, z_pos]
points = vtk.vtkPoints()
for vertex in vertices:
# print(vertex)
points.InsertNextPoint(vertex)
polygon = vtk.vtkPolygon()
polygon.GetPointIds().SetNumberOfIds(vertices.shape[0])