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import os, sys
from paraview import simple
from vtk.vtkPVServerManagerRendering import *
from vtk import *
from paraview import smtesting
NUM_POINTS = 5
### Create the geometry
points = vtkPoints()
points.SetNumberOfPoints(NUM_POINTS)
for i in xrange(NUM_POINTS):
points.SetPoint(i, i, 0.0, 0.0)
verts = vtkCellArray()
verts.InsertNextCell(NUM_POINTS)
for i in xrange(NUM_POINTS):
verts.InsertCellPoint(i)
polyData = vtkPolyData()
polyData.SetPoints(points)
polyData.SetVerts(verts)
### Create some point data
pointData = polyData.GetPointData();
# Set up a data array containing the point ordinal values
ordinalArrayName = "Ordinal";
ordinalRange = [ 0, NUM_POINTS - 1 ]
ordinalArray = vtkDoubleArray()
ordinalArray.SetName(ordinalArrayName);
ordinalArray.SetNumberOfComponents(1);
ordinalArray.SetNumberOfTuples(NUM_POINTS);
for i in xrange(NUM_POINTS):
ordinalArray.SetTuple1(i, i)
pointData.AddArray(ordinalArray)
source = simple.TrivialProducer()
source.GetClientSideObject().SetOutput(polyData)
# create a calculator to compute distance
calculator1 = simple.Calculator(Input=source)
calculator1.ResultArrayName = 'Distance'
calculator1.Function = 'mag(coords)'
# create another calculator to compute inverse distance
calculator2 = simple.Calculator(Input=calculator1)
calculator2.ResultArrayName = 'Inverse Distance'
calculator2.Function = '%s-Distance' % str(NUM_POINTS - 1)
# Get the representation
rep = simple.Show(calculator2)
# Set up coloring by one array
rep.Representation = 'Point Gaussian'
simple.ColorBy(rep, ('POINTS', 'Ordinal'))
vtkSMPVRepresentationProxy.RescaleTransferFunctionToDataRange(rep.SMProxy, 'Ordinal', 0, False)
# Set up sizing by another array
scaleTransferFunction = simple.CreatePiecewiseFunction(Points=[0.0, 0.05, 0.5, 0.0, NUM_POINTS - 1, 0.15, 0.5, 0.0])
rep.ScaleTransferFunction = scaleTransferFunction
rep.SetScaleArray = 'Distance'
rep.ScaleByArray = 1
rep.GaussianRadius = 1
# And finally, set up opacity by a third array
opacityTransferFunction = simple.CreatePiecewiseFunction(Points=[0.0, 0.2, 0.5, 0.0, NUM_POINTS - 1, 1.0, 0.5, 0.0])
rep.OpacityTransferFunction = opacityTransferFunction
rep.OpacityArray = 'Inverse Distance'
rep.OpacityByArray = 1
# Now set a custom shader snippet
rep.CustomShader = '''
//VTK::Color::Impl
float dist = dot(offsetVCVSOutput.xy,offsetVCVSOutput.xy);
if (dist > 9.0) {
discard;
}
'''
# Now render, configure the view, and re-render
renderView = simple.Render()
renderView.CenterOfRotation = [ (NUM_POINTS - 1) / 2.0 , 0, 0 ]
renderView.CameraPosition = [ (NUM_POINTS - 1) / 2.0 , 0, NUM_POINTS * 2 ]
renderView.CameraFocalPoint = [ (NUM_POINTS - 1) / 2.0 , 0, 0 ]
renderView.CameraViewAngle = 30.0
renderView.CameraParallelProjection = 0
simple.Render(renderView)
if not smtesting.DoRegressionTesting(renderView.SMProxy):
raise smtesting.TestError('Image comparison failed.')
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