TriangulateTerrainMap Delaunay 三角剖分创建 3D 地形

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①Delaunay三角剖分创建3维模型

二：代码及注释

import vtkmodules.vtkRenderingOpenGL2 import vtkmodules.vtkInteractionStyle from vtkmodules.vtkCommonColor import vtkNamedColors from vtkmodules.vtkCommonCore import vtkPoints, vtkMinimalStandardRandomSequence from vtkmodules.vtkCommonDataModel import vtkPolyData from vtkmodules.vtkFiltersGeneral import vtkVertexGlyphFilter from vtkmodules.vtkRenderingCore import vtkPolyDataMapper, vtkActor, vtkRenderer, vtkRenderWindowInteractor, \ vtkRenderWindow from vtkmodules.vtkFiltersCore import vtkDelaunay2D def main(): colors = vtkNamedColors() points = vtkPoints() gridSize = 10 seed = 10 rng = vtkMinimalStandardRandomSequence() rng.SetSeed(seed) # 等价于 rng.Initialize(seed) for x in range(0, gridSize): for y in range(0, gridSize): d = rng.GetValue() rng.Next() points.InsertNextPoint(x, y, d * 3) polydata = vtkPolyData() polydata.SetPoints(points) # 将点集转换为可以渲染的单元 glyphFilter = vtkVertexGlyphFilter() glyphFilter.SetInputData(polydata) glyphFilter.Update() pointsMapper = vtkPolyDataMapper() pointsMapper.SetInputConnection(glyphFilter.GetOutputPort()) pointsActor = vtkActor() pointsActor.SetMapper(pointsMapper) pointsActor.GetProperty().SetPointSize(3) pointsActor.GetProperty().SetColor(colors.GetColor3d("Red")) # 根据三维坐标点生成一个三角剖分地图 delaunay = vtkDelaunay2D() delaunay.SetInputData(polydata) delaunay.Update() triangulatedMapper = vtkPolyDataMapper() triangulatedMapper.SetInputConnection(delaunay.GetOutputPort()) triangulatedActor = vtkActor() triangulatedActor.SetMapper(triangulatedMapper) # Create a renderer, render window, and interactor renderer = vtkRenderer() renderWindow = vtkRenderWindow() renderWindow.AddRenderer(renderer) renderWindowInteractor = vtkRenderWindowInteractor() renderWindowInteractor.SetRenderWindow(renderWindow) # Add the actor to the scene renderer.AddActor(pointsActor) renderer.AddActor(triangulatedActor) renderer.SetBackground(colors.GetColor3d("Green")) # Background color green # Render and interact renderWindow.SetWindowName('TriangulateTerrainMap') renderWindow.Render() renderWindowInteractor.Start() if __name__ == '__main__': main()