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#!/usr/bin/env python |
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# $Id$ |
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import vtk |
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import sys, os, re |
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import getopt |
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(opts, args) = getopt.getopt(sys.argv[1:], |
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"d:f:ph", |
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["dirname=", "fnamestem=", "preproc", "help"], |
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) |
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def usage(): |
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print "Usage:" |
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print " velVis.py -d <dirname> -f <fnamestem> -p -i\n" |
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print " Arguments:" |
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print " -d/--dirname: directory of vtk files to process (req)" |
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print " -f/--fnamestem: filename stem of vtk files to process (req)" |
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print " -p/--preproc: preprocess vtk files to find global vector max? (opt)" |
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print " -i/--interactive: interactive use of first frame? (opt)" |
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#dirName = '/data/raid2/matt/results/050516/m3dpData/vis' |
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dirName = None |
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fnameStem = None |
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interactive = False |
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preproc = False # preprocess to find the global max of the data |
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for option, arg in opts: |
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if option in ('-d', '--dirname'): |
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dirName = arg |
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elif option in ('-f', '--fnamestem'): |
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fnameStem = arg |
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elif option in ('-p', '--preproc'): |
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preproc = True |
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elif option in ('-i', '--interactive'): |
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interactive = True |
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elif option in ('-h', '--help'): |
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usage() |
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sys.exit(0) |
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if dirName is None: |
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print "You must supply a directory of vtk files to process\n" |
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usage() |
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sys.exit(1) |
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if fnameStem is None: |
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print "You must supply the filename stem of the files to process" |
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print "The filename stem is the part of the filename without the" |
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print "frame number or extension\n" |
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usage() |
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sys.exit(1) |
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# now need to determine the number of files to process |
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dirList = os.listdir(dirName) |
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r = re.compile( "%s\\d+\\.\\w+" % fnameStem ) |
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count = 0 # counter for the number of files found |
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fnames = [] |
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for fname in dirList: |
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if r.match(fname): |
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fnames.append(fname) |
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count += 1 |
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# determine the first frame number and number of frames |
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fnames.sort() |
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firstFile = fnames[0] |
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r = re.compile("([a-zA-Z-])(\\d+)(\\.)(\\w+)") |
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firstNum = r.findall(firstFile) |
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firstNum = int(firstNum[0][1]) |
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# grab the filename extension as well, just in case |
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extn = r.findall(firstFile) |
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extn = extn[0][3] |
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# the number of frames should be equal to the count |
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if interactive: |
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numFrames = 1 |
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mesa = False |
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else: |
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numFrames = count |
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mesa = True |
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# try and work out the format of the zero-padded frame number |
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if count < 10: |
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formatString = '"%01d"' |
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elif count < 100: |
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formatString = '"%02d"' |
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elif count < 1000: |
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formatString = '"%03d"' |
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elif count < 10000: |
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formatString = '"%04d"' |
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elif count < 100000: |
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formatString = '"%05d"' |
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else: |
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print "Sorry, can't handle greater than 100000 input frames" |
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sys.exit(1) |
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# use mesa if required |
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if mesa: |
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factGraphics = vtk.vtkGraphicsFactory() |
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factGraphics.SetUseMesaClasses(1) |
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factImage = vtk.vtkImagingFactory() |
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factImage.SetUseMesaClasses(1) |
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# perform some preprocessing to find the global max of the vector data norm |
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maxNorm = 0 |
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if not interactive and preproc: |
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print "Preprocessing vector data" |
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sys.stdout.write("Completed: ") |
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for i in range(numFrames): |
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frameNum = eval(formatString) % i |
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reader = vtk.vtkXMLUnstructuredGridReader() |
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reader.SetFileName("%s/%s%s.%s" % (dirName,fnameStem,frameNum,extn)) |
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reader.Update() |
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grid = reader.GetOutput() |
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norm = grid.GetPointData().GetVectors().GetMaxNorm() |
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if norm > maxNorm: |
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maxNorm = norm |
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sys.stdout.write("%3.0f%%\b\b\b\b" % (float(i)/float(numFrames), )) |
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print "" |
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for i in range(firstNum, numFrames+firstNum): |
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frameNum = eval(formatString) % i |
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reader = vtk.vtkXMLUnstructuredGridReader() |
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reader.SetFileName("%s/%s%s.%s" % (dirName,fnameStem,frameNum,extn)) |
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reader.Update() |
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print "Processing %s" % fnames[i] |
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grid = reader.GetOutput() |
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# grab the model centre and bounds |
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centre = grid.GetCenter() |
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bounds = grid.GetBounds() |
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# grab the norm of the vectors |
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norm = vtk.vtkVectorNorm() |
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norm.SetInput(grid) |
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if not preproc: |
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maxNorm = grid.GetPointData().GetVectors().GetMaxNorm() |
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# to make arrow glyphs need an arrow source |
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arrow = vtk.vtkArrowSource() |
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# the arrows are 3D glyphs so set that up now |
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glyph = vtk.vtkGlyph3D() |
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glyph.ScalingOn() |
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glyph.SetScaleModeToScaleByScalar() |
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glyph.SetColorModeToColorByScalar() |
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glyph.SetVectorModeToUseVector() |
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glyph.SetScaleFactor(0.1/maxNorm) |
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glyph.SetInput(norm.GetOutput()) |
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glyph.SetSource(arrow.GetOutput()) |
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glyph.ClampingOff() |
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# set up a stripper to speed up rendening |
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stripper = vtk.vtkStripper() |
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stripper.SetInput(glyph.GetOutput()) |
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# make a lookup table for the colour map and invert it (colours look |
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# better when it's inverted) |
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lut = vtk.vtkLookupTable() |
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refLut = vtk.vtkLookupTable() |
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lut.Build() |
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refLut.Build() |
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for j in range(256): |
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lut.SetTableValue(j, refLut.GetTableValue(255-j)) |
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# set up the mapper |
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mapper = vtk.vtkPolyDataMapper() |
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mapper.SetInput(stripper.GetOutput()) |
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mapper.SetScalarRange(0,maxNorm) |
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mapper.SetLookupTable(lut) |
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# set up the actor |
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actor = vtk.vtkActor() |
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actor.SetMapper(mapper) |
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# set up the text properties for nice text |
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font_size = 20 |
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textProp = vtk.vtkTextProperty() |
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textProp.SetFontSize(font_size) |
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textProp.SetFontFamilyToArial() |
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textProp.BoldOff() |
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textProp.ItalicOff() |
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textProp.ShadowOff() |
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textProp.SetColor(0.0, 0.0, 0.0) |
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# make a title |
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title = vtk.vtkTextMapper() |
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title.SetInput("Velocity flow vectors in mantle convection") |
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# make the title text use the text properties |
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titleProp = title.GetTextProperty() |
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titleProp.ShallowCopy(textProp) |
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titleProp.SetJustificationToCentered() |
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titleProp.SetVerticalJustificationToTop() |
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titleProp.BoldOn() |
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# make the actor for the title |
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titleActor = vtk.vtkTextActor() |
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titleActor.SetMapper(title) |
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titleActor.GetPositionCoordinate().SetCoordinateSystemToNormalizedDisplay() |
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titleActor.GetPositionCoordinate().SetValue(0.5, 0.95) |
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# make a frame counter |
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counter = vtk.vtkTextMapper() |
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counter.SetInput("frame: %d" % i) |
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# make the counter use the text properties |
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counterProp = counter.GetTextProperty() |
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counterProp.ShallowCopy(textProp) |
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counterProp.SetJustificationToLeft() |
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counterProp.SetVerticalJustificationToTop() |
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counterProp.SetFontSize(14) |
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# make the actor for the frame counter |
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counterActor = vtk.vtkTextActor() |
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counterActor.SetMapper(counter) |
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counterActor.GetPositionCoordinate().SetCoordinateSystemToNormalizedDisplay() |
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counterActor.GetPositionCoordinate().SetValue(0.05, 0.8) |
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# use a scalar bar |
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scalarBar = vtk.vtkScalarBarActor() |
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scalarBar.SetLookupTable(lut) |
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scalarBar.SetWidth(0.1) |
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scalarBar.SetHeight(0.7) |
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scalarBar.SetPosition(0.9, 0.2) |
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scalarBar.SetTitle("|v|") |
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# set up its title text properties |
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scalarBarProp = scalarBar.GetTitleTextProperty() |
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scalarBarProp.ShallowCopy(textProp) |
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scalarBarProp.SetFontSize(10) |
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# set up the label text properties |
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scalarBarTextProp = scalarBar.GetLabelTextProperty() |
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scalarBarTextProp.ShallowCopy(textProp) |
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scalarBarTextProp.SetFontSize(10) |
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# put an outline around the data |
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outline = vtk.vtkOutlineSource() |
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outline.SetBounds(bounds) |
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# make its mapper |
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outlineMapper = vtk.vtkPolyDataMapper() |
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outlineMapper.SetInput(outline.GetOutput()) |
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# make its actor |
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outlineActor = vtk.vtkActor() |
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outlineActor.SetMapper(outlineMapper) |
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outlineActor.GetProperty().SetColor(0,0,0) |
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# set up the renderer and render window |
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ren = vtk.vtkRenderer() |
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renWin = vtk.vtkRenderWindow() |
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renWin.SetSize(800,600) |
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renWin.AddRenderer(ren) |
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ren.SetBackground(1,1,1) |
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# add the relevant actors |
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ren.AddActor(actor) |
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ren.AddActor(titleActor) |
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ren.AddActor(counterActor) |
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ren.AddActor(scalarBar) |
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ren.AddActor(outlineActor) |
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cam = ren.GetActiveCamera() |
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cam.Azimuth(0) |
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cam.Elevation(-90) |
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cam.Zoom(1.2) |
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ren.SetActiveCamera(cam) |
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ren.ResetCameraClippingRange() |
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# add some axes |
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axes = vtk.vtkCubeAxesActor2D() |
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axes.SetInput(grid) |
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axes.SetCamera(ren.GetActiveCamera()) |
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axes.SetLabelFormat("%6.4g") |
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axes.SetFlyModeToOuterEdges() |
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axes.SetFontFactor(0.8) |
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axes.SetAxisTitleTextProperty(textProp) |
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axes.SetAxisLabelTextProperty(textProp) |
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axes.SetXLabel("x") |
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axes.SetYLabel("y") |
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axes.SetZLabel("z") |
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axes.SetNumberOfLabels(5) |
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axes.GetProperty().SetColor(0,0,0) |
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ren.AddProp(axes) |
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if interactive: |
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# set up stuff for interactive viewing |
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iren = vtk.vtkRenderWindowInteractor() |
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iren.SetRenderWindow(renWin) |
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iren.Initialize() |
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renWin.Render() |
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iren.Start() |
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else: |
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renWin.OffScreenRenderingOn() |
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renWin.Render() |
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# the WindowToImageFilter is what one uses to save the window to an |
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# image file |
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win2img = vtk.vtkWindowToImageFilter() |
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win2img.SetInput(renWin) |
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# set up the PNMWriter as we're saving to pnm |
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writer = vtk.vtkPNMWriter() |
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writer.SetFileName("%s%04d.pnm" % (fnameStem,i)) |
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writer.SetInput(win2img.GetOutput()) |
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writer.Write() |
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print "Wrote %s%04d.pnm" % (fnameStem,i) |
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# vim: expandtab shiftwidth=4: |
Parent Directory
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