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74 lines
2.0 KiB
74 lines
2.0 KiB
2 years ago
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# This example shows how to generate and manipulate texture coordinates.
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# A random cloud of points is generated and then triangulated with
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# vtkDelaunay3D. Since these points do not have texture coordinates,
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# we generate them with vtkTextureMapToCylinder.
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package require vtk
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# Begin by generating 25 random points in the unit sphere.
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#
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vtkPointSource sphere
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sphere SetNumberOfPoints 25
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# Triangulate the points with vtkDelaunay3D. This generates a convex hull
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# of tetrahedron.
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#
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vtkDelaunay3D del
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del SetInputConnection [sphere GetOutputPort]
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del SetTolerance 0.01
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# The triangulation has texture coordinates generated so we can map
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# a texture onto it.
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#
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vtkTextureMapToCylinder tmapper
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tmapper SetInputConnection [del GetOutputPort]
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tmapper PreventSeamOn
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# We scale the texture coordinate to get some repeat patterns.
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vtkTransformTextureCoords xform
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xform SetInputConnection [tmapper GetOutputPort]
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xform SetScale 4 4 1
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# vtkDataSetMapper internally uses a vtkGeometryFilter to extract the
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# surface from the triangulation. The output (which is vtkPolyData) is
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# then passed to an internal vtkPolyDataMapper which does the
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# rendering.
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vtkDataSetMapper mapper
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mapper SetInputConnection [xform GetOutputPort]
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# A texture is loaded using an image reader. Textures are simply images.
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# The texture is eventually associated with an actor.
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#
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vtkBMPReader bmpReader
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bmpReader SetFileName "$VTK_DATA_ROOT/Data/masonry.bmp"
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vtkTexture atext
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atext SetInputConnection [bmpReader GetOutputPort]
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atext InterpolateOn
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vtkActor triangulation
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triangulation SetMapper mapper
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triangulation SetTexture atext
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# Create the standard rendering stuff.
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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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#
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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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# render the image
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#
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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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