vtk坐标系的两种显示方法.docx

vtk显示坐标系VTK库中有一个vtkAxesActor负责显示坐标系，在查阅了vtk的wiki之后，找到了两个示例，在这里将两者结合起来，放在同一个例子中显示，并用java代码重写。其中，第一个示例是直接将vtkAxesActor加入到renderer中进行显示，而第二个示例是以Widget的方式在一个独立的视口中显示，比较适合用来放在右下角指示当前的坐标系位置。最后的效果如下图：相应的java代码如下：Java代码1. /*2. *显示坐标系3. *代码参考：4. */Wiki/VTK/Examples/Cxx/Visualization/DisplayCoordinateAxes5. */Wiki/VTK/Examples/Cxx/GeometricObjects/Axes6. */7. publicclassDisplayCoordinateAxes8. static9. System.loadLibrary(vtkCommonJava);10. System.loadLibrary(vtkFilteringJava);11. System.loadLibrary(vtkIOJava);12. System.loadLibrary(vtkImagingJava);13. System.loadLibrary(vtkGraphicsJava);14. System.loadLibrary(vtkRenderingJava);15. System.loadLibrary(vtkChartsJava);16. System.loadLibrary(vtkGenericFilteringJava);17. System.loadLibrary(vtkGeovisJava);18. System.loadLibrary(vtkViewsJava);19. System.loadLibrary(vtkWidgetsJava);20. System.loadLibrary(vtkVolumeRenderingJava);21. System.loadLibrary(vtkInfovisJava);22. System.loadLibrary(vtkHybridJava);23. 24. 25. publicstaticvoidmain(Stringargs)26. /创建一个球体27. vtkSphereSourcesphereSource=newvtkSphereSource();28. sphereSource.SetCenter(0.0,0.0,0.0);29. sphereSource.SetRadius(1.0);30. sphereSource.Update();31. 32. vtkPolyDataMappermapper=newvtkPolyDataMapper();33. mapper.SetInput(sphereSource.GetOutput();34. 35. vtkActoractor=newvtkActor();36. actor.SetMapper(mapper);37. /为了能够看清楚vtkAxesActor，特意设置的透明度38. actor.GetProperty().SetOpacity(0.3);39. 40. vtkRendererrenderer=newvtkRenderer();41. vtkRenderWindowrenderWindow=newvtkRenderWindow();42. renderWindow.AddRenderer(renderer);43. 44. vtkRenderWindowInteractorrenderWindowInteractor=newvtkRenderWindowInteractor();45. renderWindowInteractor.SetRenderWindow(renderWindow);46. 47. renderer.AddActor(actor);48. renderer.SetBackground(.2,.3,.4);49. /使用vtkTransform对vtkAxesActor进行转换，默认位于(0,0,0)50. vtkTransformtransform=newvtkTransform();51. transform.Translate(1.0,0.0,0.0);52. /1、在同一个视口中显示坐标系，直接添加到renderer中53. vtkAxesActoraxes1=newvtkAxesActor();54. renderer.AddActor(axes1);55. axes1.SetUserTransform(transform);56. 57. vtkAxesActoraxes=newvtkAxesActor();58. /2、以Widget方式,在左下角的视口中显示坐标系，可进行鼠标交互59. vtkOrientationMarkerWidgetwidget=newvtkOrientationMarkerWidget();60. widget.SetOutlineColor(0.9300,0.5700,0.1300);61. widget.SetOrientationMarker(axes);62. widget.SetInteractor(renderWindowInteractor);63. widget.SetViewport(0.0,0.0,0.4,0.4);64. widget.SetEnabled(1);65. widget.InteractiveOn();66.