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本文实例为大家分享了Python Grid使用和布局的具体代码,供大家参考,具体内容如下
#!/usr/bin/env python import vtk # 这个示例主要用于将不同的图像对象显示到指定的Grid中 def main(): colors = vtk.vtkNamedColors() # Set the background color. colors.SetColor("BkgColor", [51, 77, 102, 255]) titles = list() textMappers = list() textActors = list() uGrids = list() mappers = list() actors = list() renderers = list() uGrids.append(MakeHexagonalPrism()) titles.append('Hexagonal Prism') uGrids.append(MakeHexahedron()) titles.append('Hexahedron') uGrids.append(MakePentagonalPrism()) titles.append('Pentagonal Prism') uGrids.append(MakePolyhedron()) titles.append('Polyhedron') uGrids.append(MakePyramid()) titles.append('Pyramid') uGrids.append(MakeTetrahedron()) titles.append('Tetrahedron') uGrids.append(MakeVoxel()) titles.append('Voxel') uGrids.append(MakeWedge()) titles.append('Wedge') renWin = vtk.vtkRenderWindow() renWin.SetWindowName('Cell3D Demonstration') iRen = vtk.vtkRenderWindowInteractor() iRen.SetRenderWindow(renWin) # Create one text property for all textProperty = vtk.vtkTextProperty() textProperty.SetFontSize(16) textProperty.SetJustificationToCentered() # Create and link the mappers actors and renderers together. # 为每个独立的文本图形对象创建独立的Mapper和Actors,并绑定至每个grid中 for i in range(0, len(uGrids)): textMappers.append(vtk.vtkTextMapper()) textActors.append(vtk.vtkActor2D())# mappers.append(vtk.vtkDataSetMapper()) actors.append(vtk.vtkActor()) renderers.append(vtk.vtkRenderer()) mappers[i].SetInputData(uGrids[i]) actors[i].SetMapper(mappers[i]) actors[i].GetProperty().SetColor( colors.GetColor3d("Seashell")) renderers[i].AddViewProp(actors[i]) textMappers[i].SetInput(titles[i]) textMappers[i].SetTextProperty(textProperty) textActors[i].SetMapper(textMappers[i]) textActors[i].SetPosition(120, 16) renderers[i].AddViewProp(textActors[i]) renWin.AddRenderer(renderers[i]) gridDimensions = 3 rendererSize = 300 renWin.SetSize(rendererSize * gridDimensions, rendererSize * gridDimensions) # 渲染图形对象至不同的显示区域 for row in range(0, gridDimensions): for col in range(0, gridDimensions): index = row * gridDimensions + col # (xmin, ymin, xmax, ymax) viewport = [ float(col) * rendererSize / (gridDimensions * rendererSize), float(gridDimensions - (row + 1)) * rendererSize / (gridDimensions * rendererSize), float(col + 1) * rendererSize / (gridDimensions * rendererSize), float(gridDimensions - row) * rendererSize / (gridDimensions * rendererSize)] if index > len(actors) - 1: # Add a renderer even if there is no actor. # This makes the render window background all the same color. ren = vtk.vtkRenderer() ren.SetBackground(colors.GetColor3d("BkgColor")) ren.SetViewport(viewport) renWin.AddRenderer(ren) continue renderers[index].SetViewport(viewport) renderers[index].SetBackground(colors.GetColor3d("BkgColor")) renderers[index].ResetCamera() renderers[index].GetActiveCamera().Azimuth(30) renderers[index].GetActiveCamera().Elevation(-30) renderers[index].GetActiveCamera().Zoom(0.85) renderers[index].ResetCameraClippingRange() iRen.Initialize() renWin.Render() iRen.Start() def MakeHexagonalPrism(): """ 3D: hexagonal prism: a wedge with an hexagonal base. Be careful, the base face ordering is different from wedge. """ numberOfVertices = 12 points = vtk.vtkPoints() points.InsertNextPoint(0.0, 0.0, 1.0) points.InsertNextPoint(1.0, 0.0, 1.0) points.InsertNextPoint(1.5, 0.5, 1.0) points.InsertNextPoint(1.0, 1.0, 1.0) points.InsertNextPoint(0.0, 1.0, 1.0) points.InsertNextPoint(-0.5, 0.5, 1.0) points.InsertNextPoint(0.0, 0.0, 0.0) points.InsertNextPoint(1.0, 0.0, 0.0) points.InsertNextPoint(1.5, 0.5, 0.0) points.InsertNextPoint(1.0, 1.0, 0.0) points.InsertNextPoint(0.0, 1.0, 0.0) points.InsertNextPoint(-0.5, 0.5, 0.0) hexagonalPrism = vtk.vtkHexagonalPrism() for i in range(0, numberOfVertices): hexagonalPrism.GetPointIds().SetId(i, i) ug = vtk.vtkUnstructuredGrid() ug.InsertNextCell(hexagonalPrism.GetCellType(), hexagonalPrism.GetPointIds()) ug.SetPoints(points) return ug def MakeHexahedron(): """ A regular hexagon (cube) with all faces square and three squares around each vertex is created below. Setup the coordinates of eight points (the two faces must be in counter clockwise order as viewed from the outside). As an exercise you can modify the coordinates of the points to create seven topologically distinct convex hexahedras. """ numberOfVertices = 8 # Create the points points = vtk.vtkPoints() points.InsertNextPoint(0.0, 0.0, 0.0) points.InsertNextPoint(1.0, 0.0, 0.0) points.InsertNextPoint(1.0, 1.0, 0.0) points.InsertNextPoint(0.0, 1.0, 0.0) points.InsertNextPoint(0.0, 0.0, 1.0) points.InsertNextPoint(1.0, 0.0, 1.0) points.InsertNextPoint(1.0, 1.0, 1.0) points.InsertNextPoint(0.0, 1.0, 1.0) # Create a hexahedron from the points hex_ = vtk.vtkHexahedron() for i in range(0, numberOfVertices): hex_.GetPointIds().SetId(i, i) # Add the points and hexahedron to an unstructured grid uGrid = vtk.vtkUnstructuredGrid() uGrid.SetPoints(points) uGrid.InsertNextCell(hex_.GetCellType(), hex_.GetPointIds()) return uGrid def MakePentagonalPrism(): numberOfVertices = 10 # Create the points points = vtk.vtkPoints() points.InsertNextPoint(11, 10, 10) points.InsertNextPoint(13, 10, 10) points.InsertNextPoint(14, 12, 10) points.InsertNextPoint(12, 14, 10) points.InsertNextPoint(10, 12, 10) points.InsertNextPoint(11, 10, 14) points.InsertNextPoint(13, 10, 14) points.InsertNextPoint(14, 12, 14) points.InsertNextPoint(12, 14, 14) points.InsertNextPoint(10, 12, 14) # Pentagonal Prism pentagonalPrism = vtk.vtkPentagonalPrism() for i in range(0, numberOfVertices): pentagonalPrism.GetPointIds().SetId(i, i) # Add the points and hexahedron to an unstructured grid uGrid = vtk.vtkUnstructuredGrid() uGrid.SetPoints(points) uGrid.InsertNextCell(pentagonalPrism.GetCellType(), pentagonalPrism.GetPointIds()) return uGrid def MakePolyhedron(): """ Make a regular dodecahedron. It consists of twelve regular pentagonal faces with three faces meeting at each vertex. """ # numberOfVertices = 20 numberOfFaces = 12 # numberOfFaceVertices = 5 points = vtk.vtkPoints() points.InsertNextPoint(1.21412, 0, 1.58931) points.InsertNextPoint(0.375185, 1.1547, 1.58931) points.InsertNextPoint(-0.982247, 0.713644, 1.58931) points.InsertNextPoint(-0.982247, -0.713644, 1.58931) points.InsertNextPoint(0.375185, -1.1547, 1.58931) points.InsertNextPoint(1.96449, 0, 0.375185) points.InsertNextPoint(0.607062, 1.86835, 0.375185) points.InsertNextPoint(-1.58931, 1.1547, 0.375185) points.InsertNextPoint(-1.58931, -1.1547, 0.375185) points.InsertNextPoint(0.607062, -1.86835, 0.375185) points.InsertNextPoint(1.58931, 1.1547, -0.375185) points.InsertNextPoint(-0.607062, 1.86835, -0.375185) points.InsertNextPoint(-1.96449, 0, -0.375185) points.InsertNextPoint(-0.607062, -1.86835, -0.375185) points.InsertNextPoint(1.58931, -1.1547, -0.375185) points.InsertNextPoint(0.982247, 0.713644, -1.58931) points.InsertNextPoint(-0.375185, 1.1547, -1.58931) points.InsertNextPoint(-1.21412, 0, -1.58931) points.InsertNextPoint(-0.375185, -1.1547, -1.58931) points.InsertNextPoint(0.982247, -0.713644, -1.58931) # Dimensions are [numberOfFaces][numberOfFaceVertices] dodechedronFace = [ [0, 1, 2, 3, 4], [0, 5, 10, 6, 1], [1, 6, 11, 7, 2], [2, 7, 12, 8, 3], [3, 8, 13, 9, 4], [4, 9, 14, 5, 0], [15, 10, 5, 14, 19], [16, 11, 6, 10, 15], [17, 12, 7, 11, 16], [18, 13, 8, 12, 17], [19, 14, 9, 13, 18], [19, 18, 17, 16, 15] ] dodechedronFacesIdList = vtk.vtkIdList() # Number faces that make up the cell. dodechedronFacesIdList.InsertNextId(numberOfFaces) for face in dodechedronFace: # Number of points in the face == numberOfFaceVertices dodechedronFacesIdList.InsertNextId(len(face)) # Insert the pointIds for that face. [dodechedronFacesIdList.InsertNextId(i) for i in face] uGrid = vtk.vtkUnstructuredGrid() uGrid.InsertNextCell(vtk.VTK_POLYHEDRON, dodechedronFacesIdList) uGrid.SetPoints(points) return uGrid def MakePyramid(): """ Make a regular square pyramid. """ numberOfVertices = 5 points = vtk.vtkPoints() p = [ [1.0, 1.0, 0.0], [-1.0, 1.0, 0.0], [-1.0, -1.0, 0.0], [1.0, -1.0, 0.0], [0.0, 0.0, 1.0] ] for pt in p: points.InsertNextPoint(pt) pyramid = vtk.vtkPyramid() for i in range(0, numberOfVertices): pyramid.GetPointIds().SetId(i, i) ug = vtk.vtkUnstructuredGrid() ug.SetPoints(points) ug.InsertNextCell(pyramid.GetCellType(), pyramid.GetPointIds()) return ug def MakeTetrahedron(): """ Make a tetrahedron. """ numberOfVertices = 4 points = vtk.vtkPoints() points.InsertNextPoint(0, 0, 0) points.InsertNextPoint(1, 0, 0) points.InsertNextPoint(1, 1, 0) points.InsertNextPoint(0, 1, 1) tetra = vtk.vtkTetra() for i in range(0, numberOfVertices): tetra.GetPointIds().SetId(i, i) cellArray = vtk.vtkCellArray() cellArray.InsertNextCell(tetra) unstructuredGrid = vtk.vtkUnstructuredGrid() unstructuredGrid.SetPoints(points) unstructuredGrid.SetCells(vtk.VTK_TETRA, cellArray) return unstructuredGrid def MakeVoxel(): """ A voxel is a representation of a regular grid in 3-D space. """ numberOfVertices = 8 points = vtk.vtkPoints() points.InsertNextPoint(0, 0, 0) points.InsertNextPoint(1, 0, 0) points.InsertNextPoint(0, 1, 0) points.InsertNextPoint(1, 1, 0) points.InsertNextPoint(0, 0, 1) points.InsertNextPoint(1, 0, 1) points.InsertNextPoint(0, 1, 1) points.InsertNextPoint(1, 1, 1) voxel = vtk.vtkVoxel() for i in range(0, numberOfVertices): voxel.GetPointIds().SetId(i, i) ug = vtk.vtkUnstructuredGrid() ug.SetPoints(points) ug.InsertNextCell(voxel.GetCellType(), voxel.GetPointIds()) return ug def MakeWedge(): """ A wedge consists of two triangular ends and three rectangular faces. """ numberOfVertices = 6 points = vtk.vtkPoints() points.InsertNextPoint(0, 1, 0) points.InsertNextPoint(0, 0, 0) points.InsertNextPoint(0, .5, .5) points.InsertNextPoint(1, 1, 0) points.InsertNextPoint(1, 0.0, 0.0) points.InsertNextPoint(1, .5, .5) wedge = vtk.vtkWedge() for i in range(0, numberOfVertices): wedge.GetPointIds().SetId(i, i) ug = vtk.vtkUnstructuredGrid() ug.SetPoints(points) ug.InsertNextCell(wedge.GetCellType(), wedge.GetPointIds()) return ug def WritePNG(renWin, fn, magnification=1): """ Screenshot Write out a png corresponding to the render window. :param: renWin - the render window. :param: fn - the file name. :param: magnification - the magnification. """ windowToImageFilter = vtk.vtkWindowToImageFilter() windowToImageFilter.SetInput(renWin) windowToImageFilter.SetMagnification(magnification) # Record the alpha (transparency) channel # windowToImageFilter.SetInputBufferTypeToRGBA() windowToImageFilter.SetInputBufferTypeToRGB() # Read from the back buffer windowToImageFilter.ReadFrontBufferOff() windowToImageFilter.Update() writer = vtk.vtkPNGWriter() writer.SetFileName(fn) writer.SetInputConnection(windowToImageFilter.GetOutputPort()) writer.Write() if __name__ == '__main__': main()
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。
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稳了!魔兽国服回归的3条重磅消息!官宣时间再确认!
昨天有一位朋友在大神群里分享,自己亚服账号被封号之后居然弹出了国服的封号信息对话框。
这里面让他访问的是一个国服的战网网址,com.cn和后面的zh都非常明白地表明这就是国服战网。
而他在复制这个网址并且进行登录之后,确实是网易的网址,也就是我们熟悉的停服之后国服发布的暴雪游戏产品运营到期开放退款的说明。这是一件比较奇怪的事情,因为以前都没有出现这样的情况,现在突然提示跳转到国服战网的网址,是不是说明了简体中文客户端已经开始进行更新了呢?
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