Decimation 模型的下采样

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①模型下采样

二：代码及注释

import vtkmodules.vtkRenderingOpenGL2 import vtkmodules.vtkInteractionStyle from vtkmodules.vtkCommonColor import vtkNamedColors from vtkmodules.vtkIOXML import vtkXMLPolyDataReader from vtkmodules.vtkFiltersCore import vtkDecimatePro from vtkmodules.vtkCommonDataModel import vtkPolyData from vtkmodules.vtkRenderingCore import vtkPolyDataMapper, vtkProperty, vtkActor, vtkRenderer, vtkRenderWindow, \ vtkRenderWindowInteractor, vtkCamera def main(): filePath = "Data/Torso.vtp" reduction = 0.9 colors = vtkNamedColors() backFaceColor = colors.GetColor3d("Gold") inputActorColor = colors.GetColor3d("NavajoWhite") decimatedActorColor = colors.GetColor3d('NavajoWhite') reader = vtkXMLPolyDataReader() reader.SetFileName(filePath) reader.Update() inputPolyData = reader.GetOutput() """ vtkDecimatePro 通过去除冗余的或不重要的三角形和顶点，将一个高分辨率的模型转换为一个低分辨率的模型 """ decimate = vtkDecimatePro() decimate.SetInputData(inputPolyData) decimate.SetTargetReduction(reduction) decimate.PreserveTopologyOn() # 保存原先的拓扑结构,不破坏洞或边界 decimate.Update() decimated = vtkPolyData() decimated.ShallowCopy(decimate.GetOutput()) inputMapper = vtkPolyDataMapper() inputMapper.SetInputData(inputPolyData) backFace = vtkProperty() backFace.SetColor(backFaceColor) inputActor = vtkActor() inputActor.SetMapper(inputMapper) inputActor.GetProperty().SetInterpolationToFlat() inputActor.GetProperty().SetColor(inputActorColor) inputActor.SetBackfaceProperty(backFace) decimatedMapper = vtkPolyDataMapper() decimatedMapper.SetInputData(decimated) decimatedActor = vtkActor() decimatedActor.SetMapper(decimatedMapper) decimatedActor.GetProperty().SetColor(decimatedActorColor) decimatedActor.GetProperty().SetInterpolationToFlat() decimatedActor.SetBackfaceProperty(backFace) renderWindow = vtkRenderWindow() renderWindow.SetSize(600, 300) renderWindow.SetWindowName('Decimation'); # And one interactor interactor = vtkRenderWindowInteractor() interactor.SetRenderWindow(renderWindow) leftViewport = [0.0, 0.0, 0.5, 1.0] rightViewport = [0.5, 0.0, 1.0, 1.0] leftRenderer = vtkRenderer() renderWindow.AddRenderer(leftRenderer) leftRenderer.SetViewport(leftViewport) # leftRenderer.SetBackground((colors.GetColor3d('leftBkg'))) leftRenderer.SetBackground((colors.GetColor3d('Peru'))) rightRenderer = vtkRenderer() renderWindow.AddRenderer(rightRenderer) rightRenderer.SetViewport(rightViewport) # rightRenderer.SetBackground((colors.GetColor3d('rightBkg'))) rightRenderer.SetBackground((colors.GetColor3d('CornflowerBlue'))) # Add the sphere to the left and the cube to the right leftRenderer.AddActor(inputActor) rightRenderer.AddActor(decimatedActor) # Shared camera # Shared camera looking down the -y axis camera = vtkCamera() camera.SetPosition(0, -1, 0) camera.SetFocalPoint(0, 0, 0) camera.SetViewUp(0, 0, 1) camera.Elevation(30) camera.Azimuth(30) leftRenderer.SetActiveCamera(camera) rightRenderer.SetActiveCamera(camera) leftRenderer.ResetCamera() leftRenderer.ResetCameraClippingRange() renderWindow.Render() renderWindow.SetWindowName('Decimation') interactor.Start() if __name__ == '__main__': main()