BooleanOperationPolyDataFilter 布尔运算的演示

一：主要的知识点

1、说明

本文只是教程内容的一小段，因博客字数限制，故进行拆分。主教程链接：vtk教程——逐行解析官网所有Python示例-CSDN博客

2、知识点纪要

本段代码主要涉及的有①vtkTriangleFilter三角面化，②布尔运算

二：代码及注释

import vtkmodules.vtkRenderingOpenGL2 from vtkmodules.vtkCommonColor import vtkNamedColors from vtkmodules.vtkFiltersCore import vtkCleanPolyData, vtkTriangleFilter from vtkmodules.vtkFiltersGeneral import vtkBooleanOperationPolyDataFilter from vtkmodules.vtkFiltersSources import vtkSphereSource from vtkmodules.vtkRenderingCore import ( vtkActor, vtkPolyDataMapper, vtkRenderWindow, vtkRenderWindowInteractor, vtkRenderer ) if __name__ == '__main__': colors = vtkNamedColors() operation = "intersection" # "intersection" "difference" # 没有找到示例代码中示意图的mesh模型，故采用球体去生成展示模型 """ # 展示vtkTriangleFilter和vtkCleanPolyData的用法 poly1 = ReadPolyData(fn1) tri1 = vtkTriangleFilter() tri1.SetInputData(poly1) clean1 = vtkCleanPolyData() clean1.SetInputConnection(tri1.GetOutputPort()) clean1.Update() input1 = clean1.GetOutput() vtkTriangleFilter：把 vtkPolyData 中所有的多边形（四边形、多边形等）统一转换成三角形 vtkCleanPolyData： 作用主要是 清理 / 合并重复或无效的几何数据，让 vtkPolyData 更加规整 """ sphereSource1 = vtkSphereSource() sphereSource1.SetCenter(0.25, 0, 0) sphereSource1.SetThetaResolution(21) sphereSource1.SetPhiResolution(21) sphereSource1.Update() input1 = sphereSource1.GetOutput() sphereSource2 = vtkSphereSource() sphereSource2.Update() input2 = sphereSource2.GetOutput() input1Mapper = vtkPolyDataMapper() input1Mapper.SetInputData(input1) input1Mapper.ScalarVisibilityOff() input1Actor = vtkActor() input1Actor.SetMapper(input1Mapper) input1Actor.GetProperty().SetDiffuseColor(colors.GetColor3d('Tomato')) input1Actor.GetProperty().SetSpecular(0.6) input1Actor.GetProperty().SetSpecularPower(20) input1Actor.SetPosition(input1.GetBounds()[1] - input1.GetBounds()[0], 0, 0) input2Mapper = vtkPolyDataMapper() input2Mapper.SetInputData(input2) input2Mapper.ScalarVisibilityOff() input2Actor = vtkActor() input2Actor.SetMapper(input2Mapper) input2Actor.GetProperty().SetDiffuseColor(colors.GetColor3d('Mint')) input2Actor.GetProperty().SetSpecular(0.6) input2Actor.GetProperty().SetSpecularPower(20) input2Actor.SetPosition(-(input1.GetBounds()[1] - input1.GetBounds()[0]), 0, 0) booleanOperation = vtkBooleanOperationPolyDataFilter() if operation == "union": booleanOperation.SetOperationToUnion() elif operation == "intersection": booleanOperation.SetOperationToIntersection() else: booleanOperation.SetOperationToDifference() booleanOperation.SetInputData(0, input1) booleanOperation.SetInputData(1, input2) booleanOperationMapper = vtkPolyDataMapper() booleanOperationMapper.SetInputConnection(booleanOperation.GetOutputPort()) booleanOperationMapper.ScalarVisibilityOff() booleanOperationActor = vtkActor() booleanOperationActor.SetMapper(booleanOperationMapper) booleanOperationActor.GetProperty().SetDiffuseColor(colors.GetColor3d('Banana')) booleanOperationActor.GetProperty().SetSpecular(0.6) booleanOperationActor.GetProperty().SetSpecularPower(20) renderer = vtkRenderer() renderer.AddViewProp(input1Actor) renderer.AddViewProp(input2Actor) renderer.AddViewProp(booleanOperationActor) renderer.SetBackground(colors.GetColor3d('Silver')) renderWindow = vtkRenderWindow() renderWindow.AddRenderer(renderer) renderWindow.SetSize(640, 480) renderWindow.SetWindowName('BooleanOperationPolyDataFilter') viewUp = [0.0, 0.0, 1.0] position = [0.0, -1.0, 0.0] renderer.GetActiveCamera().SetViewUp(viewUp) renderer.GetActiveCamera().SetPosition(position) renderer.ResetCamera() renderer.GetActiveCamera().Dolly(1.4) renderer.ResetCameraClippingRange() renWinInteractor = vtkRenderWindowInteractor() renWinInteractor.SetRenderWindow(renderWindow) renderWindow.Render() renWinInteractor.Start()