RuledSurfaceFilter通过连接两条不平行的三维曲线（这里是两条直线段）来生成一个光滑的、由直线构成的曲面

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①vtkRuledSurfaceFilter几何生成类介绍

二：代码及注释

import vtkmodules.vtkRenderingOpenGL2 import vtkmodules.vtkInteractionStyle from vtkmodules.vtkCommonColor import vtkNamedColors from vtkmodules.vtkCommonCore import vtkPoints from vtkmodules.vtkCommonDataModel import vtkLine, vtkCellArray, vtkPolyData from vtkmodules.vtkFiltersModeling import vtkRuledSurfaceFilter from vtkmodules.vtkRenderingCore import vtkPolyDataMapper, vtkActor, vtkRenderer, vtkRenderWindow, vtkRenderWindowInteractor def main(): colors = vtkNamedColors() points = vtkPoints() points.InsertNextPoint(0, 0, 1) points.InsertNextPoint(1, 0, 0) points.InsertNextPoint(0, 1, 0) points.InsertNextPoint(1, 1, 1) line1 = vtkLine() line1.GetPointIds().SetId(0, 0) line1.GetPointIds().SetId(1, 1) line2 = vtkLine() line2.GetPointIds().SetId(0, 2) line2.GetPointIds().SetId(1, 3) lines = vtkCellArray() lines.InsertNextCell(line1) lines.InsertNextCell(line2) polydata = vtkPolyData() polydata.SetPoints(points) polydata.SetLines(lines) """ vtkRuledSurfaceFilter 是一个几何生成类 主要用途:从两条或多条 边界曲线（lines / polylines） 之间生成一张“规则的光顺曲面（ruled surface） """ ruledSurfaceFilter = vtkRuledSurfaceFilter() ruledSurfaceFilter.SetInputData(polydata) # SetResolution 在U和V参数方向上的采样密度，更高的分辨率使曲面看起来更光滑 ruledSurfaceFilter.SetResolution(21, 21) """ SetRuledModeToResample 确保两条输入曲线被重新采样到相同数量的点 以便在它们之间创建平行的直线段(称为母线) """ ruledSurfaceFilter.SetRuledModeToResample() mapper = vtkPolyDataMapper() mapper.SetInputConnection(ruledSurfaceFilter.GetOutputPort()) actor = vtkActor() actor.SetMapper(mapper) actor.GetProperty().SetColor(colors.GetColor3d("Banana")) actor.GetProperty().SetSpecular(0.6) actor.GetProperty().SetSpecularPower(30) render = vtkRenderer() render.AddActor(actor) render.SetBackground(colors.GetColor3d("SteelBlue")) render.GetActiveCamera().Azimuth(60) render.GetActiveCamera().Elevation(60) render.ResetCamera() renderWindow = vtkRenderWindow() renderWindow.AddRenderer(render) renderWindow.SetWindowName('RuledSurfaceFilter') iren = vtkRenderWindowInteractor() iren.SetRenderWindow(renderWindow) iren.Initialize() renderWindow.Render() iren.Start() if __name__ == '__main__': main()