CameraModel1
VTKExamples/Python/Visualization/CameraModel1
Description¶
This example illustrates the camera movement around the focal point.
Note
For camera movement centered at the camera position see CameraModel2.
Note
This example corresponds to Figure 3-12 in the VTK Text.
Note
This is an adaptation of the code written by Chung Kai Lun Pete.
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See (Cxx)
Question
If you have a simple question about this example contact us at VTKExamplesProject If your question is more complex and may require extended discussion, please use the VTK Discourse Forum
Code¶
CameraModel1.py
#!/usr/bin/env python # -*- coding: utf-8 -*- import vtk def main(): colors = vtk.vtkNamedColors() # Set the colors. colors.SetColor("AzimuthArrowColor", [255, 77, 77, 255]) colors.SetColor("ElevationArrowColor", [77, 255, 77, 255]) colors.SetColor("RollArrowColor", [255, 255, 77, 255]) colors.SetColor("SpikeColor", [255, 77, 255, 255]) colors.SetColor("BkgColor", [26, 51, 102, 255]) # Create a rendering window, renderer and interactor. ren = vtk.vtkRenderer() renWin = vtk.vtkRenderWindow() renWin.AddRenderer(ren) iren = vtk.vtkRenderWindowInteractor() iren.SetRenderWindow(renWin) # Create a camera model. camCS = vtk.vtkConeSource() camCS.SetHeight(1.5) camCS.SetResolution(12) camCS.SetRadius(0.4) camCBS = vtk.vtkCubeSource() camCBS.SetXLength(1.5) camCBS.SetZLength(0.8) camCBS.SetCenter(0.4, 0, 0) camAPD = vtk.vtkAppendFilter() camAPD.AddInputConnection(camCBS.GetOutputPort()) camAPD.AddInputConnection(camCS.GetOutputPort()) camMapper = vtk.vtkPolyDataMapper() camMapper.SetInputConnection(camAPD.GetOutputPort()) camActor = vtk.vtkLODActor() camActor.SetMapper(camMapper) camActor.SetScale(2, 2, 2) # Draw the arrows. pd = vtk.vtkPolyData() ca = vtk.vtkCellArray() fp = vtk.vtkPoints() fp.InsertNextPoint(0, 1, 0) fp.InsertNextPoint(8, 1, 0) fp.InsertNextPoint(8, 2, 0) fp.InsertNextPoint(10, 0.01, 0) fp.InsertNextPoint(8, -2, 0) fp.InsertNextPoint(8, -1, 0) fp.InsertNextPoint(0, -1, 0) ca.InsertNextCell(7) ca.InsertCellPoint(0) ca.InsertCellPoint(1) ca.InsertCellPoint(2) ca.InsertCellPoint(3) ca.InsertCellPoint(4) ca.InsertCellPoint(5) ca.InsertCellPoint(6) pd.SetPoints(fp) pd.SetPolys(ca) pd2 = vtk.vtkPolyData() ca2 = vtk.vtkCellArray() fp2 = vtk.vtkPoints() fp2.InsertNextPoint(0, 1, 0) fp2.InsertNextPoint(8, 1, 0) fp2.InsertNextPoint(8, 2, 0) fp2.InsertNextPoint(10, 0.01, 0) ca2.InsertNextCell(4) ca2.InsertCellPoint(0) ca2.InsertCellPoint(1) ca2.InsertCellPoint(2) ca2.InsertCellPoint(3) pd2.SetPoints(fp2) pd2.SetLines(ca2) arrowIM = vtk.vtkImplicitModeller() arrowIM.SetInputData(pd) arrowIM.SetSampleDimensions(50, 20, 8) arrowCF = vtk.vtkContourFilter() arrowCF.SetInputConnection(arrowIM.GetOutputPort()) arrowCF.SetValue(0, 0.2) arrowWT = vtk.vtkWarpTo() arrowWT.SetInputConnection(arrowCF.GetOutputPort()) arrowWT.SetPosition(5, 0, 5) arrowWT.SetScaleFactor(0.85) arrowWT.AbsoluteOn() arrowT = vtk.vtkTransform() arrowT.RotateY(60) arrowT.Translate(-1.33198, 0, -1.479) arrowT.Scale(1, 0.5, 1) arrowTF = vtk.vtkTransformFilter() arrowTF.SetInputConnection(arrowWT.GetOutputPort()) arrowTF.SetTransform(arrowT) arrowMapper = vtk.vtkDataSetMapper() arrowMapper.SetInputConnection(arrowTF.GetOutputPort()) arrowMapper.ScalarVisibilityOff() # Draw the azimuth arrows. a1Actor = vtk.vtkLODActor() a1Actor.SetMapper(arrowMapper) a1Actor.RotateZ(180) a1Actor.SetPosition(1, 0, -1) a1Actor.GetProperty().SetColor(colors.GetColor3d("AzimuthArrowColor")) a1Actor.GetProperty().SetSpecularColor(colors.GetColor3d("White")) a1Actor.GetProperty().SetSpecular(0.3) a1Actor.GetProperty().SetSpecularPower(20) a1Actor.GetProperty().SetAmbient(0.2) a1Actor.GetProperty().SetDiffuse(0.8) a2Actor = vtk.vtkLODActor() a2Actor.SetMapper(arrowMapper) a2Actor.RotateZ(180) a2Actor.RotateX(180) a2Actor.SetPosition(1, 0, 1) a2Actor.GetProperty().SetColor(colors.GetColor3d("AzimuthArrowColor")) a2Actor.GetProperty().SetSpecularColor(colors.GetColor3d("White")) a2Actor.GetProperty().SetSpecular(0.3) a2Actor.GetProperty().SetSpecularPower(20) a2Actor.GetProperty().SetAmbient(0.2) a2Actor.GetProperty().SetDiffuse(0.8) # Draw the elevation arrows. a3Actor = vtk.vtkLODActor() a3Actor.SetMapper(arrowMapper) a3Actor.RotateZ(180) a3Actor.RotateX(90) a3Actor.SetPosition(1, -1, 0) a3Actor.GetProperty().SetColor(colors.GetColor3d("ElevationArrowColor")) a3Actor.GetProperty().SetSpecularColor(colors.GetColor3d("White")) a3Actor.GetProperty().SetSpecular(0.3) a3Actor.GetProperty().SetSpecularPower(20) a3Actor.GetProperty().SetAmbient(0.2) a3Actor.GetProperty().SetDiffuse(0.8) a4Actor = vtk.vtkLODActor() a4Actor.SetMapper(arrowMapper) a4Actor.RotateZ(180) a4Actor.RotateX(-90) a4Actor.SetPosition(1, 1, 0) a4Actor.GetProperty().SetColor(colors.GetColor3d("ElevationArrowColor")) a4Actor.GetProperty().SetSpecularColor(colors.GetColor3d("White")) a4Actor.GetProperty().SetSpecular(0.3) a4Actor.GetProperty().SetSpecularPower(20) a4Actor.GetProperty().SetAmbient(0.2) a4Actor.GetProperty().SetDiffuse(0.8) # Draw the DOP. arrowT2 = vtk.vtkTransform() arrowT2.Scale(1, 0.6, 1) arrowT2.RotateY(90) arrowTF2 = vtk.vtkTransformPolyDataFilter() arrowTF2.SetInputData(pd2) arrowTF2.SetTransform(arrowT2) arrowREF = vtk.vtkRotationalExtrusionFilter() arrowREF.SetInputConnection(arrowTF2.GetOutputPort()) arrowREF.CappingOff() arrowREF.SetResolution(30) spikeMapper = vtk.vtkPolyDataMapper() spikeMapper.SetInputConnection(arrowREF.GetOutputPort()) a5Actor = vtk.vtkLODActor() a5Actor.SetMapper(spikeMapper) a5Actor.SetScale(.3, .3, .6) a5Actor.RotateY(90) a5Actor.SetPosition(-2, 0, 0) a5Actor.GetProperty().SetColor(colors.GetColor3d("SpikeColor")) a5Actor.GetProperty().SetAmbient(0.2) a5Actor.GetProperty().SetDiffuse(0.8) # Focal point. fps = vtk.vtkSphereSource() fps.SetRadius(0.5) fpMapper = vtk.vtkPolyDataMapper() fpMapper.SetInputConnection(fps.GetOutputPort()) fpActor = vtk.vtkLODActor() fpActor.SetMapper(fpMapper) fpActor.SetPosition(-9, 0, 0) fpActor.GetProperty().SetSpecularColor(colors.GetColor3d("White")) fpActor.GetProperty().SetSpecular(0.3) fpActor.GetProperty().SetAmbient(0.2) fpActor.GetProperty().SetDiffuse(0.8) fpActor.GetProperty().SetSpecularPower(20) # Create the roll arrows. arrowWT2 = vtk.vtkWarpTo() arrowWT2.SetInputConnection(arrowCF.GetOutputPort()) arrowWT2.SetPosition(5, 0, 2.5) arrowWT2.SetScaleFactor(0.95) arrowWT2.AbsoluteOn() arrowT3 = vtk.vtkTransform() arrowT3.Translate(-2.50358, 0, -1.70408) arrowT3.Scale(0.5, 0.3, 1) arrowTF3 = vtk.vtkTransformFilter() arrowTF3.SetInputConnection(arrowWT2.GetOutputPort()) arrowTF3.SetTransform(arrowT3) arrowMapper2 = vtk.vtkDataSetMapper() arrowMapper2.SetInputConnection(arrowTF3.GetOutputPort()) arrowMapper2.ScalarVisibilityOff() # Draw the roll arrows. a6Actor = vtk.vtkLODActor() a6Actor.SetMapper(arrowMapper2) a6Actor.RotateZ(90) a6Actor.SetPosition(-4, 0, 0) a6Actor.SetScale(1.5, 1.5, 1.5) a6Actor.GetProperty().SetColor(colors.GetColor3d("RollArrowColor")) a6Actor.GetProperty().SetSpecularColor(colors.GetColor3d("White")) a6Actor.GetProperty().SetSpecular(0.3) a6Actor.GetProperty().SetSpecularPower(20) a6Actor.GetProperty().SetAmbient(0.2) a6Actor.GetProperty().SetDiffuse(0.8) # Add the actors to the renderer, set the background and size. ren.AddActor(camActor) ren.AddActor(a1Actor) ren.AddActor(a2Actor) ren.AddActor(a3Actor) ren.AddActor(a4Actor) ren.AddActor(a5Actor) ren.AddActor(a6Actor) ren.AddActor(fpActor) ren.SetBackground(colors.GetColor3d("BkgColor")) ren.SetBackground(colors.GetColor3d("SlateGray")) renWin.SetSize(640, 480) # Render the image. cam1 = (ren.GetActiveCamera()) ren.ResetCamera() cam1.Azimuth(150) cam1.Elevation(30) cam1.Dolly(1.5) ren.ResetCameraClippingRange() # Create a TextActor for azimuth (a1 and a2 actor's color). text = vtk.vtkTextActor() text.SetInput("Azimuth") tprop = text.GetTextProperty() tprop.SetFontFamilyToArial() tprop.ShadowOff() tprop.SetLineSpacing(1.0) tprop.SetFontSize(36) tprop.SetColor(a1Actor.GetProperty().GetColor()) text.SetDisplayPosition(20, 50) ren.AddActor2D(text) # Create a TextActor for elevation (a3 and a4 actor's color). text2 = vtk.vtkTextActor() text2.SetInput("Elevation") tprop = text2.GetTextProperty() tprop.SetFontFamilyToArial() tprop.ShadowOff() tprop.SetLineSpacing(1.0) tprop.SetFontSize(36) tprop.SetColor(a3Actor.GetProperty().GetColor()) text2.SetDisplayPosition(20, 100) ren.AddActor2D(text2) # Create a TextActor for roll (a6 actor's color). text3 = vtk.vtkTextActor() text3.SetInput("Roll") tprop = text3.GetTextProperty() tprop.SetFontFamilyToArial() tprop.ShadowOff() tprop.SetLineSpacing(1.0) tprop.SetFontSize(36) tprop.SetColor(a6Actor.GetProperty().GetColor()) text3.SetDisplayPosition(20, 150) ren.AddActor2D(text3) iren.Initialize() iren.Start() if __name__ == "__main__": main()