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59 lines
1.7 KiB
59 lines
1.7 KiB
2 years ago
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# This example demonstrates the use of vtkVectorText and vtkFollower.
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# vtkVectorText is used to create 3D annotation. vtkFollower is used to
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# position the 3D text and to ensure that the text always faces the
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# renderer's active camera (i.e., the text is always readable).
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#
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# First we include the VTK Tcl packages which will make available
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# all of the vtk commands to Tcl
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#
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package require vtk
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package require vtkinteraction
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# Create the axes and the associated mapper and actor.
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vtkAxes axes
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axes SetOrigin 0 0 0
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vtkPolyDataMapper axesMapper
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axesMapper SetInputConnection [axes GetOutputPort]
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vtkActor axesActor
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axesActor SetMapper axesMapper
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# Create the 3D text and the associated mapper and follower (a type of
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# actor). Position the text so it is displayed over the origin of the axes.
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vtkVectorText atext
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atext SetText "Origin"
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vtkPolyDataMapper textMapper
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textMapper SetInputConnection [atext GetOutputPort]
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vtkFollower textActor
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textActor SetMapper textMapper
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textActor SetScale 0.2 0.2 0.2
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textActor AddPosition 0 -0.1 0
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# Create the Renderer, RenderWindow, and RenderWindowInteractor.
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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.
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ren1 AddActor axesActor
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ren1 AddActor textActor
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# Zoom in closer.
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ren1 ResetCamera
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[ren1 GetActiveCamera] Zoom 1.6
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# Reset the clipping range of the camera; set the camera of the follower;
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# render.
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ren1 ResetCameraClippingRange
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textActor SetCamera [ren1 GetActiveCamera]
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renWin Render
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# Set the user method (bound to key 'u')
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#
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iren AddObserver UserEvent {wm deiconify .vtkInteract}
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# Withdraw the default tk window.
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wm withdraw .
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