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154 lines
4.6 KiB
154 lines
4.6 KiB
2 years ago
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# This example demonstrates how to use a constraint polygon in Delaunay
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# triangulation.
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#
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package require vtk
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package require vtkinteraction
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package require vtktesting
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# Generate the input points and constrained edges/polygons.
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#
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vtkPoints points
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points InsertPoint 0 1 4 0
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points InsertPoint 1 3 4 0
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points InsertPoint 2 7 4 0
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points InsertPoint 3 11 4 0
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points InsertPoint 4 13 4 0
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points InsertPoint 5 13 8 0
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points InsertPoint 6 13 12 0
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points InsertPoint 7 10 12 0
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points InsertPoint 8 7 12 0
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points InsertPoint 9 4 12 0
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points InsertPoint 10 1 12 0
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points InsertPoint 11 1 8 0
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points InsertPoint 12 3.5 5 0
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points InsertPoint 13 4.5 5 0
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points InsertPoint 14 5.5 8 0
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points InsertPoint 15 6.5 8 0
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points InsertPoint 16 6.5 5 0
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points InsertPoint 17 7.5 5 0
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points InsertPoint 18 7.5 8 0
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points InsertPoint 19 9 8 0
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points InsertPoint 20 9 5 0
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points InsertPoint 21 10 5 0
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points InsertPoint 22 10 7 0
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points InsertPoint 23 11 5 0
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points InsertPoint 24 12 5 0
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points InsertPoint 25 10.5 8 0
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points InsertPoint 26 12 11 0
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points InsertPoint 27 11 11 0
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points InsertPoint 28 10 9 0
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points InsertPoint 29 10 11 0
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points InsertPoint 30 9 11 0
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points InsertPoint 31 9 9 0
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points InsertPoint 32 7.5 9 0
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points InsertPoint 33 7.5 11 0
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points InsertPoint 34 6.5 11 0
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points InsertPoint 35 6.5 9 0
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points InsertPoint 36 5 9 0
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points InsertPoint 37 4 6 0
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points InsertPoint 38 3 9 0
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points InsertPoint 39 2 9 0
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vtkCellArray polys
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polys InsertNextCell 12
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polys InsertCellPoint 0
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polys InsertCellPoint 1
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polys InsertCellPoint 2
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polys InsertCellPoint 3
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polys InsertCellPoint 4
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polys InsertCellPoint 5
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polys InsertCellPoint 6
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polys InsertCellPoint 7
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polys InsertCellPoint 8
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polys InsertCellPoint 9
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polys InsertCellPoint 10
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polys InsertCellPoint 11
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polys InsertNextCell 28
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polys InsertCellPoint 39
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polys InsertCellPoint 38
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polys InsertCellPoint 37
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polys InsertCellPoint 36
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polys InsertCellPoint 35
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polys InsertCellPoint 34
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polys InsertCellPoint 33
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polys InsertCellPoint 32
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polys InsertCellPoint 31
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polys InsertCellPoint 30
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polys InsertCellPoint 29
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polys InsertCellPoint 28
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polys InsertCellPoint 27
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polys InsertCellPoint 26
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polys InsertCellPoint 25
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polys InsertCellPoint 24
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polys InsertCellPoint 23
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polys InsertCellPoint 22
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polys InsertCellPoint 21
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polys InsertCellPoint 20
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polys InsertCellPoint 19
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polys InsertCellPoint 18
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polys InsertCellPoint 17
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polys InsertCellPoint 16
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polys InsertCellPoint 15
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polys InsertCellPoint 14
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polys InsertCellPoint 13
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polys InsertCellPoint 12
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vtkPolyData polyData
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polyData SetPoints points
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polyData SetPolys polys
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# Notice this trick. The SetInput() method accepts a vtkPolyData that is also
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# the input to the Delaunay filter. The points of the vtkPolyData are used
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# to generate the triangulation; the polygons are used to create a constraint
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# region. The polygons are very carefully created and ordered in the right
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# direction to indicate inside and outside of the polygon.
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#
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vtkDelaunay2D del
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del SetInput polyData
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del SetSource polyData
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vtkPolyDataMapper mapMesh
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mapMesh SetInputConnection [del GetOutputPort]
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vtkActor meshActor
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meshActor SetMapper mapMesh
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# Now we just pretty the mesh up with tubed edges and balls at the vertices.
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vtkExtractEdges extract
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extract SetInputConnection [del GetOutputPort]
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vtkTubeFilter tubes
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tubes SetInputConnection [extract GetOutputPort]
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tubes SetRadius 0.1
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tubes SetNumberOfSides 6
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vtkPolyDataMapper mapEdges
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mapEdges SetInputConnection [tubes GetOutputPort]
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vtkActor edgeActor
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edgeActor SetMapper mapEdges
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eval [edgeActor GetProperty] SetColor $peacock
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[edgeActor GetProperty] SetSpecularColor 1 1 1
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[edgeActor GetProperty] SetSpecular 0.3
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[edgeActor GetProperty] SetSpecularPower 20
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[edgeActor GetProperty] SetAmbient 0.2
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[edgeActor GetProperty] SetDiffuse 0.8
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# Create graphics objects
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# Create the rendering window, renderer, and interactive renderer
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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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# Add the actors to the renderer, set the background and size
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ren1 AddActor meshActor
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ren1 AddActor edgeActor
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ren1 SetBackground 0 0 0
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renWin SetSize 450 300
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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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ren1 ResetCamera
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[ren1 GetActiveCamera] Zoom 2
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iren Initialize
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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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