如何使用python绘制立方体-创新互联
今天就跟大家聊聊有关如何使用python绘制立方体,可能很多人都不太了解,为了让大家更加了解,小编给大家总结了以下内容,希望大家根据这篇文章可以有所收获。
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具体内容如下
import vtk # Makes a vtkIdList from a Python iterable. I'm kinda surprised that # this is necessary, since I assumed that this kind of thing would # have been built into the wrapper and happen transparently, but it # seems not. def mkVtkIdList(it): vil = vtk.vtkIdList() for i in it: vil.InsertNextId(int(i)) return vil # 绘制通用方法 def myShow(cube): # Now we'll look at it. cubeMapper = vtk.vtkPolyDataMapper() if vtk.VTK_MAJOR_VERSION <= 5: cubeMapper.SetInput(cube) else: cubeMapper.SetInputData(cube) cubeMapper.SetScalarRange(0, 7) cubeActor = vtk.vtkActor() cubeActor.SetMapper(cubeMapper) # The usual rendering stuff. camera = vtk.vtkCamera() camera.SetPosition(1, 1, 1) camera.SetFocalPoint(0, 0, 0) renderer = vtk.vtkRenderer() renWin = vtk.vtkRenderWindow() renWin.AddRenderer(renderer) iren = vtk.vtkRenderWindowInteractor() iren.SetRenderWindow(renWin) renderer.AddActor(cubeActor) renderer.SetActiveCamera(camera) renderer.ResetCamera() renderer.SetBackground(0, 0, 0) renWin.SetSize(300, 300) # interact with data renWin.Render() iren.Start() del cubeMapper del cubeActor del camera del renderer del renWin del iren def main(): # x = array of 8 3-tuples of float representing the vertices of a cube: # 8个三维值代表长方体的8个顶点 x = [(0.0, 0.0, 0.0), (1.0, 0.0, 0.0), (1.0, 1.0, 0.0), (0.0, 1.0, 0.0), (0.0, 0.0, 1.0), (1.0, 0.0, 1.0), (1.0, 1.0, 1.0), (0.0, 1.0, 1.0)] # pts = array of 6 4-tuples of vtkIdType (int) representing the faces # of the cube in terms of the above vertices # 点的编号0-7,每个面由4个点组成 pts = [(0, 1, 2, 3), (4, 5, 6, 7), (0, 1, 5, 4), (1, 2, 6, 5), (2, 3, 7, 6), (3, 0, 4, 7)] # We'll create the building blocks of polydata including data attributes. cube = vtk.vtkPolyData() points = vtk.vtkPoints() polys = vtk.vtkCellArray() scalars = vtk.vtkFloatArray() # Load the point, cell, and data attributes. for i in range(8): points.InsertPoint(i, x[i]) for i in range(6): polys.InsertNextCell(mkVtkIdList(pts[i])) for i in range(8): scalars.InsertTuple1(i, i) # We now assign the pieces to the vtkPolyData. cube.SetPoints(points) del points cube.SetPolys(polys) del polys cube.GetPointData().SetScalars(scalars) del scalars myShow(cube) # Clean up del cube main()
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