/usr/share/vtk/Annotation/Python/multiLineText.py is in vtk-examples 5.8.0-14.1ubuntu3.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 | #!/usr/bin/env python
# This example demonstrates the use of multiline 2D text using
# vtkTextMappers. It shows several justifications as well as
# single-line and multiple-line text inputs.
import vtk
font_size = 14
# Create the text mappers and the associated Actor2Ds.
# The font and text properties (except justification) are the same for
# each single line mapper. Let's create a common text property object
singleLineTextProp = vtk.vtkTextProperty()
singleLineTextProp.SetFontSize(font_size)
singleLineTextProp.SetFontFamilyToArial()
singleLineTextProp.BoldOff()
singleLineTextProp.ItalicOff()
singleLineTextProp.ShadowOff()
# The font and text properties (except justification) are the same for
# each multi line mapper. Let's create a common text property object
multiLineTextProp = vtk.vtkTextProperty()
multiLineTextProp.ShallowCopy(singleLineTextProp)
multiLineTextProp.BoldOn()
multiLineTextProp.ItalicOn()
multiLineTextProp.ShadowOn()
multiLineTextProp.SetLineSpacing(0.8)
# The text is on a single line and bottom-justified.
singleLineTextB = vtk.vtkTextMapper()
singleLineTextB.SetInput("Single line (bottom)")
tprop = singleLineTextB.GetTextProperty()
tprop.ShallowCopy(singleLineTextProp)
tprop.SetVerticalJustificationToBottom()
tprop.SetColor(1, 0, 0)
singleLineTextActorB = vtk.vtkActor2D()
singleLineTextActorB.SetMapper(singleLineTextB)
singleLineTextActorB.GetPositionCoordinate().SetCoordinateSystemToNormalizedDisplay()
singleLineTextActorB.GetPositionCoordinate().SetValue(0.05, 0.85)
# The text is on a single line and center-justified (vertical
# justification).
singleLineTextC = vtk.vtkTextMapper()
singleLineTextC.SetInput("Single line (centered)")
tprop = singleLineTextC.GetTextProperty()
tprop.ShallowCopy(singleLineTextProp)
tprop.SetVerticalJustificationToCentered()
tprop.SetColor(0, 1, 0)
singleLineTextActorC = vtk.vtkActor2D()
singleLineTextActorC.SetMapper(singleLineTextC)
singleLineTextActorC.GetPositionCoordinate().SetCoordinateSystemToNormalizedDisplay()
singleLineTextActorC.GetPositionCoordinate().SetValue(0.05, 0.75)
# The text is on a single line and top-justified.
singleLineTextT = vtk.vtkTextMapper()
singleLineTextT.SetInput("Single line (top)")
tprop = singleLineTextT.GetTextProperty()
tprop.ShallowCopy(singleLineTextProp)
tprop.SetVerticalJustificationToTop()
tprop.SetColor(0, 0, 1)
singleLineTextActorT = vtk.vtkActor2D()
singleLineTextActorT.SetMapper(singleLineTextT)
singleLineTextActorT.GetPositionCoordinate().SetCoordinateSystemToNormalizedDisplay()
singleLineTextActorT.GetPositionCoordinate().SetValue(0.05, 0.65)
# The text is on multiple lines and left- and top-justified.
textMapperL = vtk.vtkTextMapper()
textMapperL.SetInput("This is\nmulti-line\ntext output\n(left-top)")
tprop = textMapperL.GetTextProperty()
tprop.ShallowCopy(multiLineTextProp)
tprop.SetJustificationToLeft()
tprop.SetVerticalJustificationToTop()
tprop.SetColor(1, 0, 0)
textActorL = vtk.vtkActor2D()
textActorL.SetMapper(textMapperL)
textActorL.GetPositionCoordinate().SetCoordinateSystemToNormalizedDisplay()
textActorL.GetPositionCoordinate().SetValue(0.05, 0.5)
# The text is on multiple lines and center-justified (both horizontal and
# vertical).
textMapperC = vtk.vtkTextMapper()
textMapperC.SetInput("This is\nmulti-line\ntext output\n(centered)")
tprop = textMapperC.GetTextProperty()
tprop.ShallowCopy(multiLineTextProp)
tprop.SetJustificationToCentered()
tprop.SetVerticalJustificationToCentered()
tprop.SetColor(0, 1, 0)
textActorC = vtk.vtkActor2D()
textActorC.SetMapper(textMapperC)
textActorC.GetPositionCoordinate().SetCoordinateSystemToNormalizedDisplay()
textActorC.GetPositionCoordinate().SetValue(0.5, 0.5)
# The text is on multiple lines and right- and bottom-justified.
textMapperR = vtk.vtkTextMapper()
textMapperR.SetInput("This is\nmulti-line\ntext output\n(right-bottom)")
tprop = textMapperR.GetTextProperty()
tprop.ShallowCopy(multiLineTextProp)
tprop.SetJustificationToRight()
tprop.SetVerticalJustificationToBottom()
tprop.SetColor(0, 0, 1)
textActorR = vtk.vtkActor2D()
textActorR.SetMapper(textMapperR)
textActorR.GetPositionCoordinate().SetCoordinateSystemToNormalizedDisplay()
textActorR.GetPositionCoordinate().SetValue(0.95, 0.5)
# Draw the grid to demonstrate the placement of the text.
# Set up the necessary points.
Pts = vtk.vtkPoints()
Pts.InsertNextPoint(0.05, 0.0, 0.0)
Pts.InsertNextPoint(0.05, 1.0, 0.0)
Pts.InsertNextPoint(0.5, 0.0, 0.0)
Pts.InsertNextPoint(0.5, 1.0, 0.0)
Pts.InsertNextPoint(0.95, 0.0, 0.0)
Pts.InsertNextPoint(0.95, 1.0, 0.0)
Pts.InsertNextPoint(0.0, 0.5, 0.0)
Pts.InsertNextPoint(1.0, 0.5, 0.0)
Pts.InsertNextPoint(0.00, 0.85, 0.0)
Pts.InsertNextPoint(0.50, 0.85, 0.0)
Pts.InsertNextPoint(0.00, 0.75, 0.0)
Pts.InsertNextPoint(0.50, 0.75, 0.0)
Pts.InsertNextPoint(0.00, 0.65, 0.0)
Pts.InsertNextPoint(0.50, 0.65, 0.0)
# Set up the lines that use these points.
Lines = vtk.vtkCellArray()
Lines.InsertNextCell(2)
Lines.InsertCellPoint(0)
Lines.InsertCellPoint(1)
Lines.InsertNextCell(2)
Lines.InsertCellPoint(2)
Lines.InsertCellPoint(3)
Lines.InsertNextCell(2)
Lines.InsertCellPoint(4)
Lines.InsertCellPoint(5)
Lines.InsertNextCell(2)
Lines.InsertCellPoint(6)
Lines.InsertCellPoint(7)
Lines.InsertNextCell(2)
Lines.InsertCellPoint(8)
Lines.InsertCellPoint(9)
Lines.InsertNextCell(2)
Lines.InsertCellPoint(10)
Lines.InsertCellPoint(11)
Lines.InsertNextCell(2)
Lines.InsertCellPoint(12)
Lines.InsertCellPoint(13)
# Create a grid that uses these points and lines.
Grid = vtk.vtkPolyData()
Grid.SetPoints(Pts)
Grid.SetLines(Lines)
# Set up the coordinate system.
normCoords = vtk.vtkCoordinate()
normCoords.SetCoordinateSystemToNormalizedViewport()
# Set up the mapper and actor (2D) for the grid.
mapper = vtk.vtkPolyDataMapper2D()
mapper.SetInput(Grid)
mapper.SetTransformCoordinate(normCoords)
gridActor = vtk.vtkActor2D()
gridActor.SetMapper(mapper)
gridActor.GetProperty().SetColor(0.1, 0.1, 0.1)
# Create the Renderer, RenderWindow, and RenderWindowInteractor
ren = vtk.vtkRenderer()
renWin = vtk.vtkRenderWindow()
renWin.AddRenderer(ren)
iren = vtk.vtkRenderWindowInteractor()
iren.SetRenderWindow(renWin)
# Add the actors to the renderer; set the background and size; zoom in
# closer to the image; render
ren.AddActor2D(textActorL)
ren.AddActor2D(textActorC)
ren.AddActor2D(textActorR)
ren.AddActor2D(singleLineTextActorB)
ren.AddActor2D(singleLineTextActorC)
ren.AddActor2D(singleLineTextActorT)
ren.AddActor2D(gridActor)
ren.SetBackground(1, 1, 1)
renWin.SetSize(500, 300)
ren.GetActiveCamera().Zoom(1.5)
iren.Initialize()
renWin.Render()
iren.Start()
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