Return the red, green and blue components for a
color as doubles.
'''
rgb = [0.0, 0.0, 0.0] # black
vtk.vtkNamedColors().GetColorRGB(colorName, rgb)
return rgb
ren1 = vtk.vtkRenderer()
renWin = vtk.vtkRenderWindow()
renWin.AddRenderer(ren1)
iren = vtk.vtkRenderWindowInteractor()
iren.SetRenderWindow(renWin)
# create implicit function primitives
cone = vtk.vtkCone()
cone.SetAngle(20)
vertPlane = vtk.vtkPlane()
vertPlane.SetOrigin(.1, 0, 0)
vertPlane.SetNormal(-1, 0, 0)
basePlane = vtk.vtkPlane()
basePlane.SetOrigin(1.2, 0, 0)
basePlane.SetNormal(1, 0, 0)
iceCream = vtk.vtkSphere()
iceCream.SetCenter(1.333, 0, 0)
iceCream.SetRadius(0.5)
bite = vtk.vtkSphere()
#!/usr/bin/env python import vtk from vtk.test import Testing from vtk.util.misc import vtkGetDataRoot VTK_DATA_ROOT = vtkGetDataRoot() # This example demonstrates adding two implicit models # to produce an (unexpected!) result # first we load in the standard vtk packages into tcl geomObject1 = vtk.vtkCone() geomObject2 = vtk.vtkSphere() geomObject2.SetRadius(0.5) geomObject2.SetCenter(0.5, 0, 0) sum = vtk.vtkImplicitSum() sum.SetNormalizeByWeight(1) sum.AddFunction(geomObject1, 2) sum.AddFunction(geomObject2, 1) sample = vtk.vtkSampleFunction() sample.SetImplicitFunction(sum) sample.SetSampleDimensions(60, 60, 60) sample.ComputeNormalsOn() surface = vtk.vtkContourFilter() surface.SetInputConnection(sample.GetOutputPort()) surface.SetValue(0, 0.0) mapper = vtk.vtkPolyDataMapper() mapper.SetInputConnection(surface.GetOutputPort()) mapper.ScalarVisibilityOff() actor = vtk.vtkActor() actor.SetMapper(mapper) actor.GetProperty().SetDiffuseColor(0.2, 0.4, 0.6) actor.GetProperty().SetSpecular(0.4)
def main():
colors = vtk.vtkNamedColors()
# Create implicit function primitives. These have been carefully placed to
# give the effect that we want. We are going to use various combinations of
# these functions to create the shape we want for example, we use planes
# intersected with a cone (which is infinite in extent) to get a finite
# cone.
#
cone = vtk.vtkCone()
cone.SetAngle(20)
vertPlane = vtk.vtkPlane()
vertPlane.SetOrigin(.1, 0, 0)
vertPlane.SetNormal(-1, 0, 0)
basePlane = vtk.vtkPlane()
basePlane.SetOrigin(1.2, 0, 0)
basePlane.SetNormal(1, 0, 0)
iceCream = vtk.vtkSphere()
iceCream.SetCenter(1.333, 0, 0)
iceCream.SetRadius(0.5)
bite = vtk.vtkSphere()
bite.SetCenter(1.5, 0, 0.5)
bite.SetRadius(0.25)
# Combine primitives to build ice-cream cone. Clip the cone with planes.
theCone = vtk.vtkImplicitBoolean()
theCone.SetOperationTypeToIntersection()
theCone.AddFunction(cone)
theCone.AddFunction(vertPlane)
theCone.AddFunction(basePlane)
# Take a bite out of the ice cream.
theCream = vtk.vtkImplicitBoolean()
theCream.SetOperationTypeToDifference()
theCream.AddFunction(iceCream)
theCream.AddFunction(bite)
# The sample function generates a distance function from the
# implicit function (which in this case is the cone). This is
# then contoured to get a polygonal surface.
#
theConeSample = vtk.vtkSampleFunction()
theConeSample.SetImplicitFunction(theCone)
theConeSample.SetModelBounds(-1, 1.5, -1.25, 1.25, -1.25, 1.25)
theConeSample.SetSampleDimensions(128, 128, 128)
theConeSample.ComputeNormalsOff()
theConeSurface = vtk.vtkContourFilter()
theConeSurface.SetInputConnection(theConeSample.GetOutputPort())
theConeSurface.SetValue(0, 0.0)
coneMapper = vtk.vtkPolyDataMapper()
coneMapper.SetInputConnection(theConeSurface.GetOutputPort())
coneMapper.ScalarVisibilityOff()
coneActor = vtk.vtkActor()
coneActor.SetMapper(coneMapper)
coneActor.GetProperty().SetColor(colors.GetColor3d("chocolate"))
# The same here for the ice cream.
#
theCreamSample = vtk.vtkSampleFunction()
theCreamSample.SetImplicitFunction(theCream)
theCreamSample.SetModelBounds(0, 2.5, -1.25, 1.25, -1.25, 1.25)
theCreamSample.SetSampleDimensions(128, 128, 128)
theCreamSample.ComputeNormalsOff()
theCreamSurface = vtk.vtkContourFilter()
theCreamSurface.SetInputConnection(theCreamSample.GetOutputPort())
theCreamSurface.SetValue(0, 0.0)
creamMapper = vtk.vtkPolyDataMapper()
creamMapper.SetInputConnection(theCreamSurface.GetOutputPort())
creamMapper.ScalarVisibilityOff()
creamActor = vtk.vtkActor()
creamActor.SetMapper(creamMapper)
creamActor.GetProperty().SetDiffuseColor(colors.GetColor3d("mint"))
creamActor.GetProperty().SetSpecular(.6)
creamActor.GetProperty().SetSpecularPower(50)
# Create the usual rendering stuff.
#
ren1 = vtk.vtkRenderer()
renWin = vtk.vtkRenderWindow()
renWin.AddRenderer(ren1)
iren = vtk.vtkRenderWindowInteractor()
iren.SetRenderWindow(renWin)
# Add the actors to the renderer, set the background and size.
#
ren1.AddActor(coneActor)
ren1.AddActor(creamActor)
ren1.SetBackground(colors.GetColor3d("SlateGray"))
renWin.SetSize(640, 480)
ren1.ResetCamera()
ren1.GetActiveCamera().Roll(90)
ren1.GetActiveCamera().Dolly(1.25)
ren1.ResetCameraClippingRange()
iren.Initialize()
# render the image
#
renWin.Render()
iren.Start()
#!/usr/bin/env python import vtk from vtk.test import Testing from vtk.util.misc import vtkGetDataRoot VTK_DATA_ROOT = vtkGetDataRoot() ren1 = vtk.vtkRenderer() renWin = vtk.vtkRenderWindow() renWin.AddRenderer(ren1) iren = vtk.vtkRenderWindowInteractor() iren.SetRenderWindow(renWin) # create implicit function primitives cone = vtk.vtkCone() cone.SetAngle(20) vertPlane = vtk.vtkPlane() vertPlane.SetOrigin(.1,0,0) vertPlane.SetNormal(-1,0,0) basePlane = vtk.vtkPlane() basePlane.SetOrigin(1.2,0,0) basePlane.SetNormal(1,0,0) iceCream = vtk.vtkSphere() iceCream.SetCenter(1.333,0,0) iceCream.SetRadius(0.5) bite = vtk.vtkSphere() bite.SetCenter(1.5,0,0.5) bite.SetRadius(0.25) # combine primitives to build ice-cream cone theCone = vtk.vtkImplicitBoolean() theCone.SetOperationTypeToIntersection() theCone.AddFunction(cone) theCone.AddFunction(vertPlane)
#!/usr/bin/env python import vtk from vtk.test import Testing from vtk.util.misc import vtkGetDataRoot VTK_DATA_ROOT = vtkGetDataRoot() # This example demonstrates adding two implicit models # to produce an (unexpected!) result # first we load in the standard vtk packages into tcl geomObject1 = vtk.vtkCone() geomObject2 = vtk.vtkSphere() geomObject2.SetRadius(0.5) geomObject2.SetCenter(0.5,0,0) sum = vtk.vtkImplicitSum() sum.SetNormalizeByWeight(1) sum.AddFunction(geomObject1,2) sum.AddFunction(geomObject2,1) sample = vtk.vtkSampleFunction() sample.SetImplicitFunction(sum) sample.SetSampleDimensions(60,60,60) sample.ComputeNormalsOn() surface = vtk.vtkContourFilter() surface.SetInputConnection(sample.GetOutputPort()) surface.SetValue(0,0.0) mapper = vtk.vtkPolyDataMapper() mapper.SetInputConnection(surface.GetOutputPort()) mapper.ScalarVisibilityOff() actor = vtk.vtkActor() actor.SetMapper(mapper) actor.GetProperty().SetDiffuseColor(0.2,0.4,0.6) actor.GetProperty().SetSpecular(0.4)
