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357 lines
9.7 KiB
357 lines
9.7 KiB
2 years ago
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# This example demonstrates volume rendering and the use of vtkLODProp3D.
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# vtkLODProp3D allows the user to set different graphical representations of
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# the data to achieve different levels of interactivity.
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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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#
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# Create an SLC reader and read in the data.
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#
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vtkSLCReader reader
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reader SetFileName "$VTK_DATA_ROOT/Data/neghip.slc"
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#
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# Create transfer functions for opacity and color to be used in volume
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# properties.
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#
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vtkPiecewiseFunction opacityTransferFunction
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opacityTransferFunction AddPoint 20 0.0
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opacityTransferFunction AddPoint 255 0.2
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vtkColorTransferFunction colorTransferFunction
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colorTransferFunction AddRGBPoint 0.0 0.0 0.0 0.0
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colorTransferFunction AddRGBPoint 64.0 1.0 0.0 0.0
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colorTransferFunction AddRGBPoint 128.0 0.0 0.0 1.0
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colorTransferFunction AddRGBPoint 192.0 0.0 1.0 0.0
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colorTransferFunction AddRGBPoint 255.0 0.0 0.2 0.0
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#
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# Create volume properties
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#
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vtkVolumeProperty volumeProperty
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volumeProperty SetColor colorTransferFunction
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volumeProperty SetScalarOpacity opacityTransferFunction
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volumeProperty SetInterpolationTypeToNearest
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vtkVolumeProperty volumeProperty2
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volumeProperty2 SetColor colorTransferFunction
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volumeProperty2 SetScalarOpacity opacityTransferFunction
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volumeProperty2 SetInterpolationTypeToLinear
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#
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# Create a volume ray cast mapper. The volume is used for levels 1 and 2 of
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# LODProp3D.
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#
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vtkVolumeRayCastCompositeFunction compositeFunction
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vtkVolumeRayCastMapper volumeMapper
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volumeMapper SetInputConnection [reader GetOutputPort]
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volumeMapper SetVolumeRayCastFunction compositeFunction
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#
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# Set up the color lookup table for the probe planes to be used in levels 3 and
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# 4 of the LODProp3D
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#
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vtkLookupTable ColorLookupTable
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ColorLookupTable SetNumberOfTableValues 256
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for { set i 0 } { $i < 256 } { incr i } {
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set r [colorTransferFunction GetRedValue $i]
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set g [colorTransferFunction GetGreenValue $i]
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set b [colorTransferFunction GetBlueValue $i]
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set a [opacityTransferFunction GetValue $i]
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set a [expr $a * 10.0]
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if { $a > 1.0 } { set a 1.0 }
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ColorLookupTable SetTableValue $i $r $g $b $a
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}
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#
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# Create planes or different resolutions to probe the data read in using the
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# SLC reader. The probe results are used as levels 3 and 4 of the LODProp3D.
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#
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set types [list hres lres]
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foreach type $types {
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for { set i 0 } { $i < 3 } { incr i } {
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vtkPlaneSource plane${i}_${type}
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vtkTransform transform${i}_${type}
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transform${i}_${type} Identity
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vtkTransformPolyDataFilter transpd${i}_${type}
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transpd${i}_${type} SetInputConnection [plane${i}_${type} GetOutputPort]
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transpd${i}_${type} SetTransform transform${i}_${type}
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vtkProbeFilter probe${i}_${type}
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probe${i}_${type} SetInputConnection [transpd${i}_${type} GetOutputPort]
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probe${i}_${type} SetSource [reader GetOutput]
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vtkCastToConcrete cast${i}_${type}
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cast${i}_${type} SetInputConnection [probe${i}_${type} GetOutputPort]
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vtkTriangleFilter tf${i}_${type}
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tf${i}_${type} SetInput [cast${i}_${type} GetPolyDataOutput]
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vtkStripper strip${i}_${type}
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strip${i}_${type} SetInputConnection [tf${i}_${type} GetOutputPort]
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}
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transform0_${type} Translate 33.0 33.0 33.0
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transform0_${type} Scale 66.0 66.0 66.0
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transform1_${type} Translate 33.0 33.0 33.0
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transform1_${type} RotateX 90
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transform1_${type} Scale 66.0 66.0 66.0
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transform2_${type} Translate 33.0 33.0 33.0
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transform2_${type} RotateY 90
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transform2_${type} Scale 66.0 66.0 66.0
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vtkAppendPolyData apd_${type}
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apd_${type} AddInput [tf0_${type} GetOutput]
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apd_${type} AddInput [tf1_${type} GetOutput]
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apd_${type} AddInput [tf2_${type} GetOutput]
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vtkPolyDataMapper probeMapper_${type}
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probeMapper_${type} SetInputConnection [apd_${type} GetOutputPort]
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probeMapper_${type} SetColorModeToMapScalars
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probeMapper_${type} SetLookupTable ColorLookupTable
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probeMapper_${type} SetScalarRange 0 255
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}
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#
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# Set the resolution of each of the planes just created
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#
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plane0_hres SetResolution 60 60
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plane1_hres SetResolution 60 60
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plane2_hres SetResolution 60 60
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plane0_lres SetResolution 25 25
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plane1_lres SetResolution 25 25
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plane2_lres SetResolution 25 25
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#
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# Set the opacity to be used in the probe mappers
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#
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vtkProperty probeProperty
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probeProperty SetOpacity 0.99
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#
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# Create outline to be used as level 5 in the LODProp3D
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#
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vtkOutlineFilter outline
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outline SetInputConnection [reader GetOutputPort]
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vtkPolyDataMapper outlineMapper
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outlineMapper SetInputConnection [outline GetOutputPort]
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vtkProperty outlineProperty
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outlineProperty SetColor 1 1 1
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#
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# Create the LODProp3D and add the mappers to it.
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#
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vtkLODProp3D lod
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set level1 [lod AddLOD volumeMapper volumeProperty2 0.0]
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set level2 [lod AddLOD volumeMapper volumeProperty 0.0]
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set level3 [lod AddLOD probeMapper_hres probeProperty 0.0]
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set level4 [lod AddLOD probeMapper_lres probeProperty 0.0]
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set level5 [lod AddLOD outlineMapper outlineProperty 0.0]
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#
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# Create the render window and the renderer.
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#
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vtkRenderWindow renWin
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vtkRenderer ren1
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renWin AddRenderer ren1
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#
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# Add the LODProp3D to the renderer and set the background
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#
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ren1 AddViewProp lod
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ren1 SetBackground 0.1 0.2 0.4
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#
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# Withdraw the default tk window
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#
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wm withdraw .
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#
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# Create the user interface including the RenderWindow
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#
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toplevel .top \
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-visual best
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wm protocol .top WM_DELETE_WINDOW ::vtk::cb_exit
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frame .top.ren
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frame .top.controls
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pack .top.controls \
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-side left -anchor n \
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-padx 3 -pady 3
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pack .top.ren \
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-side right -anchor n \
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-padx 3 -pady 3 \
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-expand t -fill both
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#
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# Create Tk renderwidget, bind events
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#
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vtkTkRenderWidget .top.ren.rw \
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-rw renWin \
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-width 300 \
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-height 300
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::vtk::bind_tk_render_widget .top.ren.rw
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pack .top.ren.rw \
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-expand t -fill both
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#
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# Create LOD display controls
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#
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label .top.controls.lod \
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-text "LOD Selected:"
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pack .top.controls.lod \
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-side top -anchor w \
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-padx 5 -pady 6
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label .top.controls.l1 -text "Level 1 FPS:"
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label .top.controls.l2 -text "Level 2 FPS:"
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label .top.controls.l3 -text "Level 3 FPS:"
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label .top.controls.l4 -text "Level 4 FPS:"
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label .top.controls.l5 -text "Level 5 FPS:"
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pack .top.controls.l1 .top.controls.l2 .top.controls.l3 .top.controls.l4 .top.controls.l5 \
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-side top -anchor w \
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-padx 5 -pady 2
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#
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# Create frame rate controls
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#
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set still_update_rate 0.5
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set interactive_update_rate 5.0
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proc update_rates {{foo 0}} {
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global still_update_rate interactive_update_rate
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set iren [renWin GetInteractor]
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$iren SetStillUpdateRate $still_update_rate
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$iren SetDesiredUpdateRate $interactive_update_rate
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}
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update_rates
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scale .top.controls.s1 \
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-label "Still FPS:" \
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-orient horizontal \
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-length 150 \
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-from 0.05 -to 1.0 -resolution 0.05 \
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-variable still_update_rate \
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-command update_rates \
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-highlightthickness 0
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scale .top.controls.s2 \
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-label "Moving FPS:" \
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-orient horizontal \
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-length 150 \
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-from 1.0 -to 100.0 -resolution 1.0 \
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-variable interactive_update_rate \
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-command update_rates \
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-highlightthickness 0
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pack .top.controls.s1 .top.controls.s2 \
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-side top \
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-anchor w -padx 5 -pady 6
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button .top.controls.quit \
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-text "Quit" \
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-command ::vtk::cb_exit
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pack .top.controls.quit \
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-side top \
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-padx 5 -pady 6 \
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-expand 1 -fill both
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#
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# Determine whether to allow automatic LOD selection.
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#
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if { [info command rtExMath] != "" } {
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lod AutomaticLODSelectionOff
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lod SetSelectedLODID $level3
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}
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#
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# Create a Tcl procedure to display (in the user interface) which LOD is
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# currently active.
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# This proc is called each time an EndEvent is triggered by the renderer.
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#
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renWin AddObserver EndEvent ChangeLabels
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proc ChangeLabels { } {
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global level1 level2 level3 level4 level5
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set value [lod GetLastRenderedLODID]
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if { $value == $level1 } {
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.top.controls.lod configure -text "LOD Selected: Level 1"
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} elseif { $value == $level2 } {
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.top.controls.lod configure -text "LOD Selected: Level 2"
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} elseif { $value == $level3 } {
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.top.controls.lod configure -text "LOD Selected: Level 3"
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} elseif { $value == $level4 } {
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.top.controls.lod configure -text "LOD Selected: Level 4"
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} elseif { $value == $level5 } {
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.top.controls.lod configure -text "LOD Selected: Level 5"
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}
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set value [lod GetLODEstimatedRenderTime $level1]
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if { $value == 0 } {
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.top.controls.l1 configure -text "Level 1 FPS: unknown"
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} else {
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.top.controls.l1 configure -text \
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"Level 1 FPS: [format "%.2f" [expr 1.0 / $value]]"
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}
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set value [lod GetLODEstimatedRenderTime $level2]
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if { $value == 0 } {
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.top.controls.l2 configure -text "Level 2 FPS: unknown"
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} else {
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.top.controls.l2 configure -text \
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"Level 2 FPS: [format "%.2f" [expr 1.0 / $value]]"
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}
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set value [lod GetLODEstimatedRenderTime $level3]
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if { $value == 0 } {
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.top.controls.l3 configure -text "Level 3 FPS: unknown"
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} else {
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.top.controls.l3 configure -text \
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"Level 3 FPS: [format "%.2f" [expr 1.0 / $value]]"
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}
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set value [lod GetLODEstimatedRenderTime $level4]
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if { $value == 0 } {
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.top.controls.l4 configure -text "Level 4 FPS: unknown"
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} else {
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.top.controls.l4 configure -text \
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"Level 4 FPS: [format "%.2f" [expr 1.0 / $value]]"
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}
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set value [lod GetLODEstimatedRenderTime $level5]
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if { $value == 0 } {
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.top.controls.l5 configure -text "Level 5 FPS: unknown"
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} else {
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.top.controls.l5 configure -text \
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"Level 5 FPS: [format "%.2f" [expr 1.0 / $value]]"
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}
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}
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#
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# Render into the RenderWindow
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#
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renWin Render
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tkwait window .
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