def build_vtk_renderer(self):
# offscreen rendering
if (vtk.vtkVersion().GetVTKMajorVersion() == 5.0):
graphics_factory = vtk.vtkGraphicsFactory()
graphics_factory.SetOffScreenOnlyMode( 1);
graphics_factory.SetUseMesaClasses( 1 );
imaging_factory = vtk.vtkImagingFactory()
imaging_factory.SetUseMesaClasses( 1 );
self.renderer = vtk.vtkRenderer()
self.renderer.SetBackground(1, 1, 1)
self.render_window = vtk.vtkRenderWindow()
# offscreen rendering
self.render_window.SetOffScreenRendering(1)
self.render_window.AddRenderer(self.renderer)
# create a renderwindowinteractor
#if self.interact:
#self.iren = vtk.vtkRenderWindowInteractor()
#self.iren.SetRenderWindow(self.render_window)
# scalar bar
self.scalarbar = vtk.vtkScalarBarActor()
# To avoid uninitialized warning in VTK 6
self.scalarbar.SetTitle("")
# black text since background is white for printing
self.scalarbar.GetLabelTextProperty().SetColor(0, 0, 0)
self.scalarbar.GetTitleTextProperty().SetColor(0, 0, 0)
def build_vtk_renderer(self):
# offscreen rendering
if (vtk.vtkVersion().GetVTKMajorVersion() == 5.0):
graphics_factory = vtk.vtkGraphicsFactory()
graphics_factory.SetOffScreenOnlyMode( 1);
graphics_factory.SetUseMesaClasses( 1 );
imaging_factory = vtk.vtkImagingFactory()
imaging_factory.SetUseMesaClasses( 1 );
self.renderer = vtk.vtkRenderer()
self.renderer.SetBackground(1, 1, 1)
self.render_window = vtk.vtkRenderWindow()
# offscreen rendering
self.render_window.SetOffScreenRendering(1)
self.render_window.AddRenderer(self.renderer)
# create a renderwindowinteractor
#if self.interact:
#self.iren = vtk.vtkRenderWindowInteractor()
#self.iren.SetRenderWindow(self.render_window)
# scalar bar
self.scalarbar = vtk.vtkScalarBarActor()
# To avoid uninitialized warning in VTK 6
self.scalarbar.SetTitle("")
# black text since background is white for printing
self.scalarbar.GetLabelTextProperty().SetColor(0, 0, 0)
self.scalarbar.GetTitleTextProperty().SetColor(0, 0, 0)
def setup_vtk_offscreen(setup_vtk_err):
""" Used to ensure VTK renders to off screen window. """
vtk_std_err, setup_qt = setup_vtk_err
factory = vtk.vtkGraphicsFactory()
factory.SetOffScreenOnlyMode(False)
factory.SetUseMesaClasses(False)
return factory, vtk_std_err, setup_qt
def set_off_screen_rendering(window):
'Turn on off-screen rendering, if available'
gfx_factory = vtk.vtkGraphicsFactory()
gfx_factory.SetOffScreenOnlyMode(1)
gfx_factory.SetUseMesaClasses(1)
img_factory = vtk.vtkImagingFactory()
img_factory.SetUseMesaClasses(1)
window.SetOffScreenRendering(1)
def renderer_to_arr(ren, size):
"""
Convert DataFrame to HTML table.
Parameters
----------
ren : Renderer
vtk Renderer.
size : tuple of int
Size of the output image
Returns
-------
arr : array
Image as numpy array.
Notes
-----
Inspired from https://github.com/fury-gl/fury/blob/master/fury/window.py
"""
width, height = size
graphics_factory = vtk.vtkGraphicsFactory()
graphics_factory.SetOffScreenOnlyMode(1)
render_window = vtk.vtkRenderWindow()
render_window.SetOffScreenRendering(1)
render_window.AddRenderer(ren)
render_window.SetSize(width, height)
render_window.SetAlphaBitPlanes(True)
render_window.SetMultiSamples(0)
ren.UseDepthPeelingOn()
ren.SetMaximumNumberOfPeels(4)
ren.SetOcclusionRatio(0.0)
render_window.Render()
window_to_image_filter = vtk.vtkWindowToImageFilter()
window_to_image_filter.SetInput(render_window)
window_to_image_filter.Update()
vtk_image = window_to_image_filter.GetOutput()
h, w, _ = vtk_image.GetDimensions()
vtk_array = vtk_image.GetPointData().GetScalars()
components = vtk_array.GetNumberOfComponents()
arr = numpy_support.vtk_to_numpy(vtk_array).reshape(w, h, components)
return arr
def __init__(self,
mesh,
camera_position,
focal_point,
view_angle,
image_size,
view_up=(0, 1, 0)):
self.graphics = vtk.vtkGraphicsFactory()
self.graphics.SetUseMesaClasses(1)
#self.img_factory = vtk.vtkImagingFactory()
#self.img_factory.SetUseMesaClasses(1)
self.mesh = mesh
self.image_size = image_size
self.mapper = vtk.vtkPolyDataMapper()
self.mapper.SetInputData(self.mesh)
self.actor = vtk.vtkActor()
self.actor.SetMapper(self.mapper)
self.camera = vtk.vtkCamera()
self.renderer = vtk.vtkRenderer()
self.renderer.SetActiveCamera(self.camera)
self.renderer.AddActor(self.actor)
self.renderer.SetBackground(0, 0, 0)
self.render_window = vtk.vtkRenderWindow()
self.render_window.SetOffScreenRendering(True)
self.render_window.AddRenderer(self.renderer)
self.interactor = vtk.vtkRenderWindowInteractor()
self.interactor.SetRenderWindow(self.render_window)
self.picker = vtk.vtkPointPicker()
self.interactor.SetPicker(self.picker)
self.render_window.SetSize(self.image_size, self.image_size)
self.camera.SetPosition(camera_position[0], camera_position[1],
camera_position[2])
self.camera.SetFocalPoint(focal_point[0], focal_point[1],
focal_point[2])
self.camera.SetViewUp(view_up)
self.camera.OrthogonalizeViewUp()
self.camera.SetViewAngle(view_angle)
self.image_filter = vtk.vtkWindowToImageFilter()
self.image_filter.SetInput(self.render_window)
def save_render_window(self, render_window, clusterviz_config, \
display_mode):
"""
Save the current render window to file
"""
# make sure we're using the mesa classes when saving to file
fact_graphics = vtkGraphicsFactory()
fact_graphics.SetUseMesaClasses(1)
fact_graphics.SetOffScreenOnlyMode(1)
render_window.OffScreenRenderingOn()
# to save the file to png, need to pass the render window
# through a filter to an image object
win2img_filter = vtkWindowToImageFilter()
win2img_filter.SetInput(render_window)
output_file = clusterviz_config.get_output_file(display_mode)
# work out the output file name's base name (the bit without .png)
base_regex = re.compile(r'(.*?)\.\w+$')
basename_search_result = base_regex.search(output_file)
if basename_search_result.group(1) is None:
self.logger.critical("Unable to determine the base image output file name.")
sys.exit(1)
output_file_basename = basename_search_result.group(1)
out_writer = vtkPNGWriter()
out_writer.SetInput(win2img_filter.GetOutput())
out_writer.SetFileName("%s.png" % output_file_basename)
# render the window to save it to file
render_window.Render()
out_writer.Write()
# and write out a file with the current date on it
from datetime import datetime
date = datetime.now()
date_str = date.strftime("%Y%m%d_%H%M")
fname_str = "%s_%s.png" % (output_file_basename, date_str)
out_writer.SetFileName(fname_str)
# save it to file
out_writer.Write()
def takeScreenShort(self):
graphics_factory = vtk.vtkGraphicsFactory();
graphics_factory.SetOffScreenOnlyMode(1);
graphics_factory.SetUseMesaClasses(1);
windows = vtk.vtkRenderWindow();
#Do not open the window!!
windows.SetOffScreenRendering(True);
windows.SetSize(self.width,self.height);
mapper = vtk.vtkPolyDataMapper();
mapper.SetInputData(self.data);
for d in ("X","Y",):
for degree in range(0,100,90):
actor = vtk.vtkActor()
actor.SetMapper(mapper);
getattr(actor,"Rotate{}".format(d))(degree);
actor.GetProperty().SetColor(0,0,0)
ren = vtk.vtkRenderer();
windows.AddRenderer(ren);
ren.AddActor(actor);
ren.SetBackground(255.0, 255.0, 255.0);
ren.ResetCamera();
cen = ren.GetActiveCamera().GetFocalPoint();
bounds = actor.GetBounds();
lightOne = vtk.vtkLight();
lightOne.SetFocalPoint(cen);
lightOne.SetPosition(cen);
lightOne.PositionalOff();
lightTwo = vtk.vtkLight();
lightTwo.SetFocalPoint(cen);
lightTwo.SetPosition(bounds[0],bounds[2],bounds[4]);
lightTwo.PositionalOn();
lightThree = vtk.vtkLight();
lightThree.SetFocalPoint(cen);
lightThree.SetPosition(bounds[1],bounds[3],bounds[5]);
lightThree.PositionalOn();
ren.AddLight(lightOne);
ren.AddLight(lightTwo);
ren.AddLight(lightThree);
windows.Render();
self.saveToImage(windows,"{}_{}_{}".format(self.fileName,d,degree));
windows.RemoveRenderer(ren);
def takeScreenShort(self):
graphics_factory = vtk.vtkGraphicsFactory();
graphics_factory.SetOffScreenOnlyMode(1);
graphics_factory.SetUseMesaClasses(1);
windows = vtk.vtkRenderWindow();
#Do not open the window!!
windows.SetOffScreenRendering(True);
windows.SetSize(self.width,self.height);
rot_op = RotateOp();
op_translate = TransformOp(rot_op);
for d in ("X","Y","Z",):
for degree in range(0,360,self.step):
if d == "X":
rot_op.rotateX = degree * math.pi / 180.0;
elif d == "Y":
rot_op.rotateY = degree * math.pi / 180.0;
else:
rot_op.rotateZ = degree * math.pi / 180.0;
op_translate.data = self.data;
mapper = vtk.vtkPolyDataMapper();
mapper.SetInputData(op_translate.perform());
op_translate.reset();
actor = vtk.vtkActor()
actor.SetMapper(mapper);
if self.plain_color:
actor.GetProperty().SetColor(*[c for c in self.obj_rgb]);
else:
actor.GetProperty().SetSpecularColor(*[c/255.0 for c in self.obj_rgb_spec]);
actor.GetProperty().SetDiffuseColor(*[c/255.0 for c in self.obj_rgb_diff]);
actor.GetProperty().SetAmbientColor(*[c/255.0 for c in self.obj_rgb_amb]);
ren = vtk.vtkRenderer();
windows.AddRenderer(ren);
ren.AddActor(actor);
ren.SetBackground(self.rgb[0]/255.0,self.rgb[1]/255.0,self.rgb[2]/255.0);
windows.Render();
self.saveToImage(windows,"{}_{}_{}".format(self.fileName,d,degree));
windows.RemoveRenderer(ren);
def gen_mesh_probe_png(self, probe, png_filename):
"""
Generate PNG image of the FE mesh.
Parameters
----------
probe : VTK objectstr
The probe, VTKPolyData or VTKSource.
png_filename : str
The name of the output PNG file.
"""
surface = vtk.vtkDataSetSurfaceFilter()
if vtk_version < 6:
surface.SetInput(self.vtkdata)
else:
surface.SetInputData(self.vtkdata)
surface.Update()
gf = vtk.vtkGraphicsFactory()
gf.SetOffScreenOnlyMode(1)
gf.SetUseMesaClasses(1)
ifa = vtk.vtkImagingFactory()
ifa.SetUseMesaClasses(1)
mapper = vtk.vtkPolyDataMapper()
if vtk_version < 6:
mapper.SetInput(surface.GetOutput())
else:
mapper.SetInputData(surface.GetOutput())
mapper.SetScalarModeToUseCellData()
actor = vtk.vtkActor()
actor.SetMapper(mapper)
actor.GetProperty().SetOpacity(0.33)
mapper2 = vtk.vtkPolyDataMapper()
if hasattr(probe, 'GetOutput'):
probe0 = probe.GetOutput()
else:
probe0 = probe
if vtk_version < 6:
mapper2.SetInput(probe0)
else:
mapper2.SetInputData(probe0)
actor2 = vtk.vtkActor()
actor2.SetMapper(mapper2)
actor2.GetProperty().SetColor(0,0,0)
actor2.GetProperty().SetLineWidth(2)
ren = vtk.vtkRenderer()
renWin = vtk.vtkRenderWindow()
renWin.SetOffScreenRendering(1)
renWin.AddRenderer(ren)
ren.AddActor(actor)
ren.AddActor(actor2)
ren.SetBackground(1, 1, 1)
renWin.Render()
image = vtk.vtkWindowToImageFilter()
image.SetInput(renWin)
image.Update()
writer = vtk.vtkPNGWriter()
writer.SetFileName(png_filename)
if vtk_version < 6:
writer.SetInput(image.GetOutput())
else:
writer.SetInputData(image.GetOutput())
writer.Write()
def gen_shot(vtk_filename, png_filename):
"""
Generate PNG image of the FE mesh.
Parameters
----------
vtk_filename : str
The input mesh filename (file in VTK format).
png_filename : str
The name of the output PNG file.
"""
reader = vtk.vtkUnstructuredGridReader()
reader.SetFileName(vtk_filename)
reader.Update()
bnd = reader.GetOutput().GetPoints().GetBounds()
surface0 = vtk.vtkDataSetSurfaceFilter()
surface0.SetInput(reader.GetOutput())
surface0.Update()
if abs(bnd[5] - bnd[4]) > 1.0e-12:
tr = vtk.vtkTransform()
tr.RotateWXYZ(45, 1, 1, 1)
trFilter = vtk.vtkTransformPolyDataFilter()
trFilter.SetTransform(tr)
trFilter.SetInputConnection(surface0.GetOutputPort())
trFilter.Update()
surface = trFilter
else:
surface = surface0
ca, cb = surface.GetOutput().GetCellData().GetScalars().GetRange()
lut = vtk.vtkLookupTable()
lut.SetHueRange(0.667, 0.667)
lut.SetSaturationRange(0.0, 1.0)
lut.SetValueRange(0.8, 1.0)
lut.SetAlphaRange(1.0, 1.0)
lut.SetTableRange(ca, cb)
gf = vtk.vtkGraphicsFactory()
gf.SetOffScreenOnlyMode(1)
gf.SetUseMesaClasses(1)
ifa = vtk.vtkImagingFactory()
ifa.SetUseMesaClasses(1)
mapper = vtk.vtkPolyDataMapper()
mapper.SetLookupTable(lut)
mapper.SetScalarRange(ca, cb)
mapper.SetInput(surface.GetOutput())
mapper.SetScalarModeToUseCellData()
actor = vtk.vtkActor()
actor.SetMapper(mapper)
mapper2 = vtk.vtkPolyDataMapper()
mapper2.SetInput(surface.GetOutput())
actor2 = vtk.vtkActor()
actor2.SetMapper(mapper2)
actor2.GetProperty().SetRepresentationToWireframe()
ren = vtk.vtkRenderer()
renWin = vtk.vtkRenderWindow()
renWin.SetOffScreenRendering(1)
renWin.AddRenderer(ren)
ren.AddActor(actor)
ren.AddActor(actor2)
renWin.Render()
image = vtk.vtkWindowToImageFilter()
image.SetInput(renWin)
image.Update()
base, _ = os.path.splitext(vtk_filename)
writer = vtk.vtkPNGWriter()
writer.SetFileName(png_filename)
writer.SetInput(image.GetOutput())
writer.Write()
def main(argv):
#Just get something working for testing...
try:
opts, args = getopt.getopt(argv, "hi:", ["ifile="])
except getopt.GetoptError as err:
print 'tviewer.py -i <inputfile.vtk>'
print(str(err))
for opt, arg in opts:
if opt == '-h':
print 'tviewer.py -i <inputfile.vtk>'
sys.exit()
elif opt in ("-i", "--ifile"):
inputfile = arg
print("Going to load and view ", inputfile)
#Read data
reader = vtk.vtkXMLImageDataReader()
reader.SetFileName(inputfile)
reader.Update()
#lut = vtk.vtkLookupTable()
#lut.SetNumberOfColors(65535)
#lut.SetHueRange(0.0, 2.667)
#lut.SetVectorMode(vtk.vtkScalarsToColors.MAGNITUDE)
#lut.Build()
#Setup offscreen rendering
graphics_factory = vtk.vtkGraphicsFactory()
graphics_factory.SetOffScreenOnlyMode(1)
graphics_factory.SetUseMesaClasses(1)
#imaging_factory = vtk.vtkImagingFactory()
#imaging_factory.SetUseMesaClasses(1)
#Get image from reader
image = reader.GetOutput()
#image.SetSpacing(1,1,1)
#image.GetPointData().SetScalars(image.GetPointData().GetVectors())
#Compute Q Criterion for texture mapping
vorticity = vtk.vtkGradientFilter()
vorticity.SetInputData(image)
vorticity.SetInputScalars(image.FIELD_ASSOCIATION_POINTS, "Velocity")
vorticity.ComputeQCriterionOn()
#vorticity.SetComputeGradient(0)
vorticity.Update()
#Generate contour for comparison
c = vtk.vtkContourFilter()
#c.SetValue(0,1128)
c.SetValue(0, 450)
image.GetPointData().SetScalars(
vorticity.GetOutput().GetPointData().GetVectors("Q-criterion"))
c.SetInputData(image)
c.Update()
contour = c.GetOutput()
#contour.GetCellData().SetScalars(image.GetPointData().GetVectors("Velocity"))
normals = vtk.vtkPolyDataNormals()
normals.SetInputData(contour)
normals.SetFeatureAngle(45) #?
normals.Update()
#print normals.GetOutput()
mapper = vtk.vtkPolyDataMapper()
mapper.SetInputData(normals.GetOutput())
mapper.ScalarVisibilityOn()
mapper.SetScalarRange(-1, 1)
mapper.SetScalarModeToUsePointFieldData()
mapper.ColorByArrayComponent("Velocity", 0)
#print image
#print contour
#mapper.SelectColorArray("Q-criterion")
#mapper.SetLookupTable(lut)
#print mapper
actor = vtk.vtkActor()
actor.SetMapper(mapper)
ren = vtk.vtkRenderer()
ren.AddActor(actor)
ren.SetBackground(1, 1, 1)
ren.ResetCamera()
renWin = vtk.vtkRenderWindow()
renWin.SetSize(400, 400)
renWin.SetOffScreenRendering(1)
renWin.AddRenderer(ren)
renWin.Render()
windowToImageFilter = vtk.vtkWindowToImageFilter()
windowToImageFilter.SetInput(renWin)
windowToImageFilter.Update()
w = vtk.vtkPNGWriter()
w.SetFileName("cube.png")
w.SetInputConnection(windowToImageFilter.GetOutputPort())
w.Write()
def main(argv):
#Just get something working for testing...
try:
opts, args = getopt.getopt(argv,"hi:", ["ifile="])
except getopt.GetoptError as err:
print 'tviewer.py -i <inputfile.vtk>'
print (str(err))
for opt, arg in opts:
if opt == '-h':
print 'tviewer.py -i <inputfile.vtk>'
sys.exit()
elif opt in ("-i", "--ifile"):
inputfile = arg
print("Going to load and view ", inputfile)
#Read data
reader = vtk.vtkXMLImageDataReader()
reader.SetFileName(inputfile)
reader.Update()
#lut = vtk.vtkLookupTable()
#lut.SetNumberOfColors(65535)
#lut.SetHueRange(0.0, 2.667)
#lut.SetVectorMode(vtk.vtkScalarsToColors.MAGNITUDE)
#lut.Build()
#Setup offscreen rendering
graphics_factory = vtk.vtkGraphicsFactory()
graphics_factory.SetOffScreenOnlyMode(1)
graphics_factory.SetUseMesaClasses(1)
#imaging_factory = vtk.vtkImagingFactory()
#imaging_factory.SetUseMesaClasses(1)
#Get image from reader
image = reader.GetOutput()
#image.SetSpacing(1,1,1)
#image.GetPointData().SetScalars(image.GetPointData().GetVectors())
#Compute Q Criterion for texture mapping
vorticity = vtk.vtkGradientFilter()
vorticity.SetInputData(image)
vorticity.SetInputScalars(image.FIELD_ASSOCIATION_POINTS,"Velocity")
vorticity.ComputeQCriterionOn()
#vorticity.SetComputeGradient(0)
vorticity.Update()
#Generate contour for comparison
c = vtk.vtkContourFilter()
#c.SetValue(0,1128)
c.SetValue(0,450)
image.GetPointData().SetScalars(vorticity.GetOutput().GetPointData().GetVectors("Q-criterion"))
c.SetInputData(image)
c.Update()
contour = c.GetOutput()
#contour.GetCellData().SetScalars(image.GetPointData().GetVectors("Velocity"))
normals = vtk.vtkPolyDataNormals()
normals.SetInputData(contour)
normals.SetFeatureAngle(45) #?
normals.Update()
#print normals.GetOutput()
mapper = vtk.vtkPolyDataMapper()
mapper.SetInputData(normals.GetOutput())
mapper.ScalarVisibilityOn()
mapper.SetScalarRange(-1,1)
mapper.SetScalarModeToUsePointFieldData()
mapper.ColorByArrayComponent("Velocity", 0)
#print image
#print contour
#mapper.SelectColorArray("Q-criterion")
#mapper.SetLookupTable(lut)
#print mapper
actor = vtk.vtkActor()
actor.SetMapper(mapper)
ren = vtk.vtkRenderer()
ren.AddActor(actor)
ren.SetBackground(1,1,1)
ren.ResetCamera()
renWin = vtk.vtkRenderWindow()
renWin.SetSize(400,400)
renWin.SetOffScreenRendering(1)
renWin.AddRenderer(ren)
renWin.Render()
windowToImageFilter = vtk.vtkWindowToImageFilter()
windowToImageFilter.SetInput(renWin)
windowToImageFilter.Update()
w = vtk.vtkPNGWriter()
w.SetFileName("cube.png")
w.SetInputConnection(windowToImageFilter.GetOutputPort())
w.Write()
def snapshot(scene,
fname=None,
size=(300, 300),
offscreen=True,
order_transparent=False,
stereo='off'):
"""Save a snapshot of the scene in a file or in memory.
Parameters
-----------
scene : Scene() or vtkRenderer
Scene instance
fname : str or None
Save PNG file. If None return only an array without saving PNG.
size : (int, int)
``(width, height)`` of the window. Default is (300, 300).
offscreen : bool
Default True. Go stealthmode no window should appear.
order_transparent : bool
Default False. Use depth peeling to sort transparent objects.
stereo: string
Set the stereo type. Default is 'off'. Other types include: \n
'opengl': OpenGL frame-sequential stereo. Referred to as \
'CrystalEyes' by VTK. \n
'anaglyph': For use with red/blue glasses. See VTK docs to \
use different colors. \n
'interlaced': Line interlaced. \n
'checkerboard': Checkerboard interlaced. \n
'left': Left eye only. \n
'right': Right eye only. \n
'horizontal': Side-by-side.
Returns
-------
arr : ndarray
Color array of size (width, height, 3) where the last dimension
holds the RGB values.
"""
width, height = size
if offscreen:
graphics_factory = vtk.vtkGraphicsFactory()
graphics_factory.SetOffScreenOnlyMode(1)
# TODO check if the line below helps in something
# graphics_factory.SetUseMesaClasses(1)
render_window = vtk.vtkRenderWindow()
if offscreen:
render_window.SetOffScreenRendering(1)
if stereo.lower() != 'off':
enable_stereo(render_window, stereo)
render_window.AddRenderer(scene)
render_window.SetSize(width, height)
if order_transparent:
# Use a render window with alpha bits
# as default is 0 (false))
render_window.SetAlphaBitPlanes(True)
# Force to not pick a framebuffer with a multisample buffer
# (default is 8)
render_window.SetMultiSamples(0)
# Choose to use depth peeling (if supported)
# (default is 0 (false)):
scene.UseDepthPeelingOn()
# Set depth peeling parameters
# Set the maximum number of rendering passes (default is 4)
scene.SetMaximumNumberOfPeels(4)
# Set the occlusion ratio (initial value is 0.0, exact image):
scene.SetOcclusionRatio(0.0)
render_window.Render()
window_to_image_filter = vtk.vtkWindowToImageFilter()
window_to_image_filter.SetInput(render_window)
window_to_image_filter.Update()
vtk_image = window_to_image_filter.GetOutput()
h, w, _ = vtk_image.GetDimensions()
vtk_array = vtk_image.GetPointData().GetScalars()
components = vtk_array.GetNumberOfComponents()
arr = numpy_support.vtk_to_numpy(vtk_array).reshape(h, w, components)
if fname is None:
return arr
writer = vtk.vtkPNGWriter()
writer.SetFileName(fname)
writer.SetInputConnection(window_to_image_filter.GetOutputPort())
writer.Write()
return arr
def gen_shot(vtk_filename, png_filename):
"""
Generate PNG image of the FE mesh.
Parameters
----------
vtk_filename : str
The input mesh filename (file in VTK format).
png_filename : str
The name of the output PNG file.
"""
reader = vtk.vtkUnstructuredGridReader()
reader.SetFileName(vtk_filename)
reader.Update()
bnd = reader.GetOutput().GetPoints().GetBounds()
surface0 = vtk.vtkDataSetSurfaceFilter()
surface0.SetInput(reader.GetOutput())
surface0.Update()
if abs(bnd[5] - bnd[4]) > 1.0e-12:
tr = vtk.vtkTransform()
tr.RotateWXYZ(45,1,1,1)
trFilter = vtk.vtkTransformPolyDataFilter()
trFilter.SetTransform(tr)
trFilter.SetInputConnection(surface0.GetOutputPort())
trFilter.Update()
surface = trFilter
else:
surface = surface0
ca,cb = surface.GetOutput().GetCellData().GetScalars().GetRange()
lut = vtk.vtkLookupTable()
lut.SetHueRange(0.667, 0.667)
lut.SetSaturationRange(0.0, 1.0)
lut.SetValueRange(0.8, 1.0)
lut.SetAlphaRange(1.0, 1.0)
lut.SetTableRange(ca,cb)
gf = vtk.vtkGraphicsFactory()
gf.SetOffScreenOnlyMode(1)
gf.SetUseMesaClasses(1)
ifa = vtk.vtkImagingFactory()
ifa.SetUseMesaClasses(1)
mapper = vtk.vtkPolyDataMapper()
mapper.SetLookupTable(lut)
mapper.SetScalarRange(ca,cb);
mapper.SetInput(surface.GetOutput())
mapper.SetScalarModeToUseCellData()
actor = vtk.vtkActor()
actor.SetMapper(mapper)
mapper2 = vtk.vtkPolyDataMapper()
mapper2.SetInput(surface.GetOutput())
actor2 = vtk.vtkActor()
actor2.SetMapper(mapper2)
actor2.GetProperty().SetRepresentationToWireframe()
ren = vtk.vtkRenderer()
renWin = vtk.vtkRenderWindow()
renWin.SetOffScreenRendering(1)
renWin.AddRenderer(ren)
ren.AddActor(actor)
ren.AddActor(actor2)
renWin.Render()
image = vtk.vtkWindowToImageFilter()
image.SetInput(renWin)
image.Update()
base, _ = os.path.splitext(vtk_filename)
writer = vtk.vtkPNGWriter()
writer.SetFileName(png_filename)
writer.SetInput(image.GetOutput())
writer.Write()
def snapshot(scene,
fname=None,
size=(300, 300),
offscreen=True,
order_transparent=False):
"""Save a snapshot of the scene in a file or in memory.
Parameters
-----------
scene : Scene() or vtkRenderer
Scene instance
fname : str or None
Save PNG file. If None return only an array without saving PNG.
size : (int, int)
``(width, height)`` of the window. Default is (300, 300).
offscreen : bool
Default True. Go stealthmode no window should appear.
order_transparent : bool
Default False. Use depth peeling to sort transparent objects.
Returns
-------
arr : ndarray
Color array of size (width, height, 3) where the last dimension
holds the RGB values.
"""
width, height = size
if offscreen:
graphics_factory = vtk.vtkGraphicsFactory()
graphics_factory.SetOffScreenOnlyMode(1)
# TODO check if the line below helps in something
# graphics_factory.SetUseMesaClasses(1)
render_window = vtk.vtkRenderWindow()
if offscreen:
render_window.SetOffScreenRendering(1)
render_window.AddRenderer(scene)
render_window.SetSize(width, height)
if order_transparent:
# Use a render window with alpha bits
# as default is 0 (false))
render_window.SetAlphaBitPlanes(True)
# Force to not pick a framebuffer with a multisample buffer
# (default is 8)
render_window.SetMultiSamples(0)
# Choose to use depth peeling (if supported)
# (default is 0 (false)):
scene.UseDepthPeelingOn()
# Set depth peeling parameters
# Set the maximum number of rendering passes (default is 4)
scene.SetMaximumNumberOfPeels(4)
# Set the occlusion ratio (initial value is 0.0, exact image):
scene.SetOcclusionRatio(0.0)
render_window.Render()
window_to_image_filter = vtk.vtkWindowToImageFilter()
window_to_image_filter.SetInput(render_window)
window_to_image_filter.Update()
vtk_image = window_to_image_filter.GetOutput()
h, w, _ = vtk_image.GetDimensions()
vtk_array = vtk_image.GetPointData().GetScalars()
components = vtk_array.GetNumberOfComponents()
arr = numpy_support.vtk_to_numpy(vtk_array).reshape(h, w, components)
if fname is None:
return arr
writer = vtk.vtkPNGWriter()
writer.SetFileName(fname)
writer.SetInputConnection(window_to_image_filter.GetOutputPort())
writer.Write()
return arr
# this is the one used in the matlab docs: z = x*exp(-x^2-y^2)
z = zeros((len(x),len(y)), dtype=floating)
# boy do *I* feel old fashioned writing it this way
# surely there's another way to do it: - something to do later
for i in range(len(x)):
for j in range(len(y)):
z[i,j] = x[i]*exp(-x[i]*x[i] - y[j]*y[j])
import vtk
interactive = True
if not interactive:
_factGraphics = vtk.vtkGraphicsFactory()
_factGraphics.SetUseMesaClasses(1)
_factImage = vtk.vtkImagingFactory()
_factImage.SetUseMesaClasses(1)
# set up the renderer and the render window
_ren = vtk.vtkRenderer()
_renWin = vtk.vtkRenderWindow()
_renWin.AddRenderer(_ren)
_renWin.SetSize(640,480)
if not interactive:
_renWin.OffScreenRenderingOn()
# set up the points
_points = vtk.vtkPoints()
_points.SetNumberOfPoints(len(x))
def main(argv):
#Just get something working for testing...
try:
opts, args = getopt.getopt(argv,"hi:", ["ifile="])
except getopt.GetoptError as err:
print 'tviewer.py -i <inputfile.vtk>'
print (str(err))
for opt, arg in opts:
if opt == '-h':
print 'tviewer.py -i <inputfile.vtk>'
sys.exit()
elif opt in ("-i", "--ifile"):
inputfile = arg
print("Going to load and view ", inputfile)
#Read data
reader = vtk.vtkXMLImageDataReader()
reader.SetFileName(inputfile)
reader.Update()
#Setup offscreen rendering
graphics_factory = vtk.vtkGraphicsFactory()
graphics_factory.SetOffScreenOnlyMode(1)
graphics_factory.SetUseMesaClasses(1)
#Get image from reader
image = reader.GetOutput()
print ("Image read in")
#compute q-criterion
vorticity = vtk.vtkGradientFilter()
vorticity.SetInputData(image)
vorticity.SetInputScalars(image.FIELD_ASSOCIATION_POINTS,"Velocity")
vorticity.ComputeQCriterionOn()
vorticity.SetComputeGradient(0)
vorticity.Update()
print ("Vorticity done")
#Get magnitude not sure we need it now. lets see.
#mag = vtk.vtkImageMagnitude()
#cp = vtk.vtkCellDataToPointData()
#cp.SetInputData(vorticity.GetOutput())
#cp.Update()
#image.GetPointData().SetScalars(cp.GetOutput().GetPointData().GetVectors())
#mag.SetInputData(image)
#mag.Update()
#m = mag.GetOutput()
image.GetPointData().SetScalars(vorticity.GetOutput().GetPointData().GetVectors("Q-criterion"))
print image
#image.GetPointData().SetScalars(image.GetPointData().GetVectors("Velocity"))
c = vtk.vtkContourFilter()
#c.SetValue(0,1128)
c.SetValue(0,600)
c.SetInputData(image)
c.Update()
#import pdb; pdb.set_trace()
contour = c.GetOutput()
#contour.GetCellData().SetScalars(image.GetPointData().GetVectors("Velocity"))
print "Contour done"
#normals = vtk.vtkPolyDataNormals()
#normals.SetInputData(contour)
#normals.SetFeatureAngle(45) #?
#normals.Update()
#print normals.GetOutput()
mapper = vtk.vtkPolyDataMapper()
mapper.SetInputData(contour)
mapper.ScalarVisibilityOn()
mapper.SetScalarRange(-1,1)
mapper.SetScalarModeToUsePointFieldData()
mapper.ColorByArrayComponent("Velocity", 0)
#import pdb; pdb.set_trace()
print ("mapped")
#print mapper
actor = vtk.vtkActor()
actor.SetMapper(mapper)
ren = vtk.vtkRenderer()
ren.AddActor(actor)
ren.SetBackground(1,1,1)
ren.ResetCamera()
#camera = vtk.vtkCamera()
#camera.SetPosition(0,0,0)
#camera.SetFocalPoint(0,0,0)
#ren.SetActiveCamera(camera)
renWin = vtk.vtkRenderWindow()
renWin.SetSize(600,600)
renWin.AddRenderer(ren)
renWin.SetOffScreenRendering(1)
#import pdb; pdb.set_trace()
#iren = vtk.vtkRenderWindowInteractor()
#iren.SetRenderWindow(renWin)
#iren.Initialize()
#iren.Start()
windowToImageFilter = vtk.vtkWindowToImageFilter()
windowToImageFilter.SetInput(renWin)
windowToImageFilter.Update()
w = vtk.vtkPNGWriter()
w.SetFileName("cube.png")
w.SetInputConnection(windowToImageFilter.GetOutputPort())
w.Write()
def gen_mesh_probe_png(self, probe, png_filename):
"""
Generate PNG image of the FE mesh.
Parameters
----------
probe : VTK objectstr
The probe, VTKPolyData or VTKSource.
png_filename : str
The name of the output PNG file.
"""
surface = vtk.vtkDataSetSurfaceFilter()
if vtk_version < 6:
surface.SetInput(self.vtkdata)
else:
surface.SetInputData(self.vtkdata)
surface.Update()
gf = vtk.vtkGraphicsFactory()
gf.SetOffScreenOnlyMode(1)
gf.SetUseMesaClasses(1)
ifa = vtk.vtkImagingFactory()
ifa.SetUseMesaClasses(1)
mapper = vtk.vtkPolyDataMapper()
if vtk_version < 6:
mapper.SetInput(surface.GetOutput())
else:
mapper.SetInputData(surface.GetOutput())
mapper.SetScalarModeToUseCellData()
actor = vtk.vtkActor()
actor.SetMapper(mapper)
actor.GetProperty().SetOpacity(0.33)
mapper2 = vtk.vtkPolyDataMapper()
if hasattr(probe, 'GetOutput'):
probe0 = probe.GetOutput()
else:
probe0 = probe
if vtk_version < 6:
mapper2.SetInput(probe0)
else:
mapper2.SetInputData(probe0)
actor2 = vtk.vtkActor()
actor2.SetMapper(mapper2)
actor2.GetProperty().SetColor(0,0,0)
actor2.GetProperty().SetLineWidth(2)
ren = vtk.vtkRenderer()
renWin = vtk.vtkRenderWindow()
renWin.SetOffScreenRendering(1)
renWin.AddRenderer(ren)
ren.AddActor(actor)
ren.AddActor(actor2)
ren.SetBackground(1, 1, 1)
renWin.Render()
image = vtk.vtkWindowToImageFilter()
image.SetInput(renWin)
image.Update()
writer = vtk.vtkPNGWriter()
writer.SetFileName(png_filename)
if vtk_version < 6:
writer.SetInput(image.GetOutput())
else:
writer.SetInputData(image.GetOutput())
writer.Write()
def main(argv):
#Just get something working for testing...
try:
opts, args = getopt.getopt(argv, "hi:", ["ifile="])
except getopt.GetoptError as err:
print 'tviewer.py -i <inputfile.vtk>'
print(str(err))
for opt, arg in opts:
if opt == '-h':
print 'tviewer.py -i <inputfile.vtk>'
sys.exit()
elif opt in ("-i", "--ifile"):
inputfile = arg
print("Going to load and view ", inputfile)
#Read data
reader = vtk.vtkXMLImageDataReader()
reader.SetFileName(inputfile)
reader.Update()
#Setup offscreen rendering
graphics_factory = vtk.vtkGraphicsFactory()
graphics_factory.SetOffScreenOnlyMode(1)
graphics_factory.SetUseMesaClasses(1)
#Get image from reader
image = reader.GetOutput()
print("Image read in")
#compute q-criterion
vorticity = vtk.vtkGradientFilter()
vorticity.SetInputData(image)
vorticity.SetInputScalars(image.FIELD_ASSOCIATION_POINTS, "Velocity")
vorticity.ComputeQCriterionOn()
vorticity.SetComputeGradient(0)
vorticity.Update()
print("Vorticity done")
#Get magnitude not sure we need it now. lets see.
#mag = vtk.vtkImageMagnitude()
#cp = vtk.vtkCellDataToPointData()
#cp.SetInputData(vorticity.GetOutput())
#cp.Update()
#image.GetPointData().SetScalars(cp.GetOutput().GetPointData().GetVectors())
#mag.SetInputData(image)
#mag.Update()
#m = mag.GetOutput()
image.GetPointData().SetScalars(
vorticity.GetOutput().GetPointData().GetVectors("Q-criterion"))
print image
#image.GetPointData().SetScalars(image.GetPointData().GetVectors("Velocity"))
c = vtk.vtkContourFilter()
#c.SetValue(0,1128)
c.SetValue(0, 600)
c.SetInputData(image)
c.Update()
#import pdb; pdb.set_trace()
contour = c.GetOutput()
#contour.GetCellData().SetScalars(image.GetPointData().GetVectors("Velocity"))
print "Contour done"
#normals = vtk.vtkPolyDataNormals()
#normals.SetInputData(contour)
#normals.SetFeatureAngle(45) #?
#normals.Update()
#print normals.GetOutput()
mapper = vtk.vtkPolyDataMapper()
mapper.SetInputData(contour)
mapper.ScalarVisibilityOn()
mapper.SetScalarRange(-1, 1)
mapper.SetScalarModeToUsePointFieldData()
mapper.ColorByArrayComponent("Velocity", 0)
#import pdb; pdb.set_trace()
print("mapped")
#print mapper
actor = vtk.vtkActor()
actor.SetMapper(mapper)
ren = vtk.vtkRenderer()
ren.AddActor(actor)
ren.SetBackground(1, 1, 1)
ren.ResetCamera()
#camera = vtk.vtkCamera()
#camera.SetPosition(0,0,0)
#camera.SetFocalPoint(0,0,0)
#ren.SetActiveCamera(camera)
renWin = vtk.vtkRenderWindow()
renWin.SetSize(600, 600)
renWin.AddRenderer(ren)
renWin.SetOffScreenRendering(1)
#import pdb; pdb.set_trace()
#iren = vtk.vtkRenderWindowInteractor()
#iren.SetRenderWindow(renWin)
#iren.Initialize()
#iren.Start()
windowToImageFilter = vtk.vtkWindowToImageFilter()
windowToImageFilter.SetInput(renWin)
windowToImageFilter.Update()
w = vtk.vtkPNGWriter()
w.SetFileName("cube.png")
w.SetInputConnection(windowToImageFilter.GetOutputPort())
w.Write()