WarpVector 基于向量数据的形变

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①vtkWarpVector基于向量的形变

二：代码及注释

import vtkmodules.vtkRenderingOpenGL2 import vtkmodules.vtkInteractionStyle from vtkmodules.vtkCommonColor import vtkNamedColors from vtkmodules.vtkCommonCore import vtkPoints, vtkDoubleArray from vtkmodules.vtkCommonDataModel import vtkCellArray, vtkLine, vtkPolyData from vtkmodules.vtkFiltersGeneral import vtkWarpVector from vtkmodules.vtkRenderingCore import ( vtkActor, vtkPolyDataMapper, vtkRenderWindow, vtkRenderWindowInteractor, vtkRenderer ) def main(): colors = vtkNamedColors() points = vtkPoints() points.InsertNextPoint(0.0, 0.0, 0.0) points.InsertNextPoint(1.0, 0.0, 0.0) points.InsertNextPoint(2.0, 0.0, 0.0) points.InsertNextPoint(3.0, 0.0, 0.0) points.InsertNextPoint(4.0, 0.0, 0.0) lines = vtkCellArray() line = vtkLine() line.GetPointIds().SetId(0, 0) line.GetPointIds().SetId(1, 1) lines.InsertNextCell(line) line.GetPointIds().SetId(0, 1) line.GetPointIds().SetId(1, 2) lines.InsertNextCell(line) line.GetPointIds().SetId(0, 2) line.GetPointIds().SetId(1, 3) lines.InsertNextCell(line) line.GetPointIds().SetId(0, 3) line.GetPointIds().SetId(1, 4) lines.InsertNextCell(line) warpData = vtkDoubleArray() warpData.SetNumberOfComponents(3) warpData.SetName("warpData") warp = [0.0, 0.0, 0.0] warpData.InsertNextTuple(warp) warp[1] = 0.1 warpData.InsertNextTuple(warp) warp[1] = 0.3 warpData.InsertNextTuple(warp) warp[1] = 0.0 warpData.InsertNextTuple(warp) warp[1] = 0.1 warpData.InsertNextTuple(warp) polydata = vtkPolyData() polydata.SetPoints(points) polydata.SetLines(lines) polydata.GetPointData().AddArray(warpData) polydata.GetPointData().SetActiveVectors(warpData.GetName()) """ vtkWarpVector 是 VTK 里一个非常实用的 形变滤波器 可以根据数据集中每个点的向量值（vector data）来移动点的位置 """ warpVector = vtkWarpVector() warpVector.SetInputData(polydata) warpVector.Update() mapper = vtkPolyDataMapper() mapper.SetInputData(warpVector.GetPolyDataOutput()) actor = vtkActor() actor.SetMapper(mapper) renderer = vtkRenderer() renderer.AddActor(actor) renderer.SetBackground(colors.GetColor3d('cobalt_green')) renderWindow = vtkRenderWindow() renderWindow.AddRenderer(renderer) renderWindow.SetWindowName('WarpVector') renderWindowInteractor = vtkRenderWindowInteractor() renderWindowInteractor.SetRenderWindow(renderWindow) renderWindow.Render() renderWindowInteractor.Start() if __name__ == '__main__': main()