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80 lines
1.9 KiB
80 lines
1.9 KiB
package require vtk
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package require vtkinteraction
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# Create the RenderWindow, Renderer and both Actors
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#
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vtkRenderer ren1
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vtkRenderWindow renWin
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renWin AddRenderer ren1
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vtkRenderWindowInteractor iren
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iren SetRenderWindow renWin
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# create some points on a sphere such that the data is not in the form
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# of z = f(x,y)
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#
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vtkMath math1
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vtkPoints points
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vtkFloatArray vectors
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vectors SetNumberOfComponents 3
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for {set i 0} {$i<100} {incr i 1} {
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set theta [math1 Random 0.31415 2.8]
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set phi [math1 Random 0.31415 2.8]
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eval points InsertPoint $i [expr cos($theta)*sin($phi)] [expr sin($theta)*sin($phi)] [expr cos($phi)]
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eval vectors InsertTuple3 $i [expr cos($theta)*sin($phi)] [expr sin($theta)*sin($phi)] [expr cos($phi)]
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}
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vtkPolyData profile
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profile SetPoints points
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[profile GetPointData] SetVectors vectors
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# build a transform that rotates this data into z = f(x,y)
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#
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vtkTransform transform
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transform RotateX 90
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# triangulate the data using the specified transform
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#
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vtkDelaunay2D del1
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del1 SetInput profile
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del1 SetTransform transform
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del1 BoundingTriangulationOff
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del1 SetTolerance 0.001
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del1 SetAlpha 0.0
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vtkShrinkPolyData shrink
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shrink SetInputConnection [del1 GetOutputPort]
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vtkPolyDataMapper map
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map SetInputConnection [shrink GetOutputPort]
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vtkActor triangulation
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triangulation SetMapper map
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[triangulation GetProperty] SetColor 1 0 0
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[triangulation GetProperty] BackfaceCullingOn
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# Add the actors to the renderer, set the background and size
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#
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ren1 AddActor triangulation
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ren1 SetBackground 1 1 1
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renWin SetSize 300 300
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renWin Render
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set cam1 [ren1 GetActiveCamera]
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$cam1 Zoom 1.5
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$cam1 Azimuth 90
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$cam1 Elevation 30
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$cam1 Azimuth -60
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# render the image
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#
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iren AddObserver UserEvent {wm deiconify .vtkInteract}
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renWin Render
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# prevent the tk window from showing up then start the event loop
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wm withdraw .
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