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72 lines
2.3 KiB
72 lines
2.3 KiB
2 years ago
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#
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# This simple example shows how to do basic rendering and pipeline
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# creation. It also demonstrates the use of the LODActor.
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#
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# We start off by loading some Tcl modules. One is the basic VTK library;
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# the second is a package for rendering, and the last includes a set
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# of color definitions.
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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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# This creates a polygonal cylinder model with eight circumferential facets.
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#
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vtkSTLReader part
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part SetFileName "$VTK_DATA_ROOT/Data/42400-IDGH.stl"
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# The mapper is responsible for pushing the geometry into the graphics
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# library. It may also do color mapping, if scalars or other attributes
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# are defined.
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#
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vtkPolyDataMapper partMapper
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partMapper SetInputConnection [part GetOutputPort]
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# The LOD actor is a special type of actor. It will change appearance in
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# order to render faster. At the highest resolution, it renders ewverything
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# just like an actor. The middle level is a point cloud, and the lowest
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# level is a simple bounding box.
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vtkLODActor partActor
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partActor SetMapper partMapper
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eval [partActor GetProperty] SetColor $light_grey
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partActor RotateX 30.0
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partActor RotateY -45.0
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# Create the graphics structure. The renderer renders into the
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# render window. The render window interactor captures mouse events
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# and will perform appropriate camera or actor manipulation
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# depending on the nature of the events.
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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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# Add the actors to the renderer, set the background and size
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#
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ren1 AddActor partActor
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ren1 SetBackground 0.1 0.2 0.4
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renWin SetSize 200 200
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# The next line associates a Tcl proc with a "keypress-u" event
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# in the rendering window. In this case the proc deiconifies the
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# .vtkInteract Tk form that was defined when we loaded
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# "package require vtkinteraction".
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iren AddObserver UserEvent {wm deiconify .vtkInteract}
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# This starts the event loop and as a side effect causes an initial render.
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iren Initialize
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# We'll zoom in a little by accessing the camera and invoking a "Zoom"
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# method on it.
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ren1 ResetCamera
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[ren1 GetActiveCamera] Zoom 1.5
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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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