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package require vtk
vtkImageReader reader
reader SetDataByteOrderToLittleEndian
reader SetDataExtent 0 63 0 63 1 93
reader SetDataSpacing 3.2 3.2 1.5
reader SetFilePrefix "$VTK_DATA_ROOT/Data/headsq/quarter"
reader SetDataMask 0x7fff
set rangeStart 0.0
set rangeEnd 0.2
vtkLookupTable LUT
LUT SetTableRange 0 1800
LUT SetSaturationRange 1 1
LUT SetHueRange $rangeStart $rangeEnd
LUT SetValueRange 1 1
LUT SetAlphaRange 1 1
LUT Build
# The prototype of this function has
# arguments so that the code can be
# translated to python for testing.
proc changeLUT { { a 0 } { b 0 } } {
global rangeStart rangeEnd
set rangeStart [expr $rangeStart + 0.1]
set rangeEnd [expr $rangeEnd + 0.1]
if { $rangeEnd > 1.0 } {
set rangeStart 0.0
set rangeEnd 0.2
}
LUT SetHueRange $rangeStart $rangeEnd
LUT Build
}
vtkImageMapToColors mapToRGBA
mapToRGBA SetInputConnection [reader GetOutputPort]
mapToRGBA SetOutputFormatToRGBA
mapToRGBA SetLookupTable LUT
mapToRGBA AddObserver "EndEvent" changeLUT
vtkImageDataStreamer imageStreamer
imageStreamer SetInputConnection [mapToRGBA GetOutputPort]
imageStreamer SetNumberOfStreamDivisions 8
# make sure we get the correct translator.
imageStreamer UpdateInformation
[imageStreamer GetExtentTranslator] SetSplitModeToBlock
# set the window/level to 255.0/127.5 to view full range
vtkImageViewer viewer
viewer SetInputConnection [imageStreamer GetOutputPort]
viewer SetColorWindow 255.0
viewer SetColorLevel 127.5
viewer SetZSlice 50
viewer Render
#make interface
viewer Render
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