58同城二手房出售优化设计三年级下册数学答案

58同城二手房出售,优化设计三年级下册数学答案,网站修改思路,宣传片拍摄方案模板一#xff1a;主要的知识点 1、说明 本文只是教程内容的一小段#xff0c;因博客字数限制#xff0c;故进行拆分。主教程链接#xff1a;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①背景渐变着色的区分#xff0c;②vtkCoo…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①背景渐变着色的区分②vtkCoordinate坐标系统的转化二代码及注释from vtkmodules.vtkFiltersSources import vtkConeSource, vtkSphereSource from vtkmodules.vtkIOLegacy import vtkPolyDataReader from vtkmodules.vtkIOXML import vtkXMLPolyDataReader from vtkmodules.vtkIOGeometry import vtkOBJReader, vtkBYUReader, vtkSTLReader from vtkmodules.vtkIOPLY import vtkPLYReader from vtkmodules.vtkRenderingCore import vtkActor, vtkRenderer, vtkRenderWindow, vtkRenderWindowInteractor, \ vtkPolyDataMapper, vtkTextMapper, vtkTextProperty, vtkViewport, vtkCoordinate, vtkActor2D, vtkPolyDataMapper2D from vtkmodules.vtkCommonColor import vtkNamedColors from vtkmodules.vtkCommonCore import vtkPoints from vtkmodules.vtkCommonDataModel import ( vtkCellArray, vtkPolyData, vtkPolyLine ) def read_polydata_(path): poly_data vtkPolyData() if path is None: # Default to a cone if the path is empty. source vtkConeSource() source.SetResolution(25) source.SetDirection(0, 1, 0) source.SetHeight(1) source.Update() poly_data.DeepCopy(source.GetOutput()) return poly_data valid_suffixes [.g, .obj, .stl, .ply, .vtk, .vtp] ext path.suffix.lower() if path.suffix not in valid_suffixes: print(Warning:, path, unknown extension, using a sphere instead.) source vtkSphereSource() source.SetPhiResolution(50) source.SetThetaResolution(50) source.Update() poly_data.DeepCopy(source.GetOutput()) else: if ext .ply: reader vtkPLYReader() reader.SetFileName(file_name) reader.Update() poly_data.DeepCopy(reader.GetOutput()) elif ext .vtp: reader vtkXMLPolyDataReader() reader.SetFileName(file_name) reader.Update() poly_data.DeepCopy(reader.GetOutput()) elif ext .obj: reader vtkOBJReader() reader.SetFileName(file_name) reader.Update() poly_data.DeepCopy(reader.GetOutput()) elif ext .stl: reader vtkSTLReader() reader.SetFileName(file_name) reader.Update() poly_data.DeepCopy(reader.GetOutput()) elif ext .vtk: reader vtkPolyDataReader() reader.SetFileName(file_name) reader.Update() poly_data.DeepCopy(reader.GetOutput()) elif ext .g: reader vtkBYUReader() reader.SetGeometryFileName(file_name) reader.Update() poly_data.DeepCopy(reader.GetOutput()) return poly_data def viewport_border(renderer, sides, border_color, border_width): 在给定的 3D渲染器vtkRenderer对应的 2D视口Viewport周围绘制一个用户自定义颜色和宽度的边框 colors vtkNamedColors() 先定义点的坐标 这里的坐标(x, y)是在标准化视口坐标系中定义的范围从0到1 (0, 0)代表视口的左下角(1, 1)代表视口的右上角。这四个点定义了视口区域的四个角 points vtkPoints() points.SetNumberOfPoints(4) points.InsertPoint(0, 1, 1, 0) points.InsertPoint(1, 0, 1, 0) points.InsertPoint(2, 0, 0, 0) points.InsertPoint(3, 1, 0, 0) cells vtkCellArray() cells.Initialize() if sides[0]: # Top top vtkPolyLine() top.GetPointIds().SetNumberOfIds(2) top.GetPointIds().SetId(0, 0) top.GetPointIds().SetId(1, 1) cells.InsertNextCell(top) if sides[1]: # Left left vtkPolyLine() left.GetPointIds().SetNumberOfIds(2) left.GetPointIds().SetId(0, 1) left.GetPointIds().SetId(1, 2) cells.InsertNextCell(left) if sides[2]: # Bottom bottom vtkPolyLine() bottom.GetPointIds().SetNumberOfIds(2) bottom.GetPointIds().SetId(0, 2) bottom.GetPointIds().SetId(1, 3) cells.InsertNextCell(bottom) if sides[3]: # Right right vtkPolyLine() right.GetPointIds().SetNumberOfIds(2) right.GetPointIds().SetId(0, 3) right.GetPointIds().SetId(1, 0) cells.InsertNextCell(right) poly vtkPolyData() poly.Initialize() poly.SetPoints(points) poly.SetLines(cells) vtkCoordinate 负责处理 不同坐标系统之间的坐标转换特别是在渲染Renderer和显示Display过程中 简单来说 vtkCoordinate就是用来表示并转换一个点在不同坐标系统中的位置 vtk中常见的坐标系统 名称 英文标识 描述 世界坐标 **World** 三维空间中物体的真实坐标例如几何模型的点位置 视图坐标 **View** 相机变换后的坐标相机坐标系 规范化视口坐标 **Normalized Viewport** 渲染窗口中的归一化坐标范围 [0,1] 视口坐标 **Viewport** 渲染窗口内的像素坐标受相机投影影响 显示坐标 **Display** 屏幕上的实际像素坐标例如鼠标点击位置 规范化显示坐标 **Normalized Display** 屏幕归一化坐标范围 [0,1] coordinate vtkCoordinate() coordinate.SetCoordinateSystemToNormalizedViewport() # 设置 coordinate 的坐标系统为 Normalized Viewport规范化视口坐标系 mapper vtkPolyDataMapper2D() mapper.SetInputData(poly) mapper.SetTransformCoordinate(coordinate) actor vtkActor2D() actor.SetMapper(mapper) actor.GetProperty().SetColor(colors.GetColor3d(border_color)) actor.GetProperty().SetLineWidth(border_width) renderer.AddViewProp(actor) def main(): fp None pd read_polydata_(fp) ren_win vtkRenderWindow() ren_win.SetWindowName(GradientBackground) iren vtkRenderWindowInteractor() renderers [] modes [ vtkViewport.GradientModes.VTK_GRADIENT_VERTICAL, vtkViewport.GradientModes.VTK_GRADIENT_HORIZONTAL, vtkViewport.GradientModes.VTK_GRADIENT_RADIAL_VIEWPORT_FARTHEST_SIDE, vtkViewport.GradientModes.VTK_GRADIENT_RADIAL_VIEWPORT_FARTHEST_CORNER, ] 模式Mode,描述,渐变方向 VTK_GRADIENT_VERTICAL,垂直渐变,从底部 (SetBackground) 到顶部 (SetBackground2) 颜色过渡。 VTK_GRADIENT_HORIZONTAL,水平渐变,从左侧 (SetBackground) 到右侧 (SetBackground2) 颜色过渡。 VTK_GRADIENT_RADIAL_VIEWPORT_FARTHEST_SIDE,径向渐变最远边,从中心 (SetBackground) 向视口最远的那条边进行径向扩散渐变直到边缘变为 SetBackground2 的颜色。 VTK_GRADIENT_RADIAL_VIEWPORT_FARTHEST_CORNER,径向渐变最远角,从中心 (SetBackground) 向视口最远的那个角进行径向扩散渐变直到角落变为 SetBackground2 的颜色。 colors vtkNamedColors() mapper vtkPolyDataMapper() mapper.SetInputData(pd) actor vtkActor() actor.SetMapper(mapper) actor.GetProperty().SetColor(colors.GetColor3d(Honeydew)) actor.GetProperty().SetSpecular(0.3) actor.GetProperty().SetSpecularPower(60.0) ren_width 640 ren_height 480 xmins [0.0, 0.5, 0.0, 0.5] ymins [0.0, 0.0, 0.5, 0.5] xmaxs [0.5, 1.0, 0.5, 1.0] ymaxs [0.5, 0.5, 1.0, 1.0] bottom_color colors.GetColor3d(Gold) top_color colors.GetColor3d(OrangeRed) left_color colors.GetColor3d(Gold) right_color colors.GetColor3d(OrangeRed) center_color colors.GetColor3d(Gold) side_color colors.GetColor3d(OrangeRed) corner_color colors.GetColor3d(OrangeRed) viewport_title [Vertical, Horizontal, Radial Farthest Side, Radial Farthest Corner, ] text_property vtkTextProperty() text_property.SetJustificationToCentered() text_property.SetFontSize(ren_height // 12) text_property.SetColor(colors.GetColor3d(MidnightBlue)) text_mappers [] text_actors [] lb [False, True, True, False] lbr [False, True, True, True] tlb [True, True, True, False] tlbr [True, True, True, True] border_color DarkGreen border_width 4.0 for i in range(0, 4): text_mappers.append(vtkTextMapper()) text_mappers[i].SetInput(viewport_title[i]) text_mappers[i].SetTextProperty(text_property) text_actors.append(vtkActor2D()) text_actors[i].SetMapper(text_mappers[i]) text_actors[i].SetPosition(ren_width / 2, 8) renderers.append(vtkRenderer()) renderers[i].AddActor(text_actors[i]) renderers[i].AddActor(actor) renderers[i].GradientBackgroundOn() renderers[i].SetGradientMode(modes[i]) renderers[i].SetViewport(xmins[i], ymins[i], xmaxs[i], ymaxs[i]) if i 1: # Horizontal renderers[i].SetBackground(left_color) renderers[i].SetBackground2(right_color) viewport_border(renderers[i], lbr, border_color, border_width) elif i 2: # Radial Farthest Side renderers[i].SetBackground(center_color) renderers[i].SetBackground2(side_color) viewport_border(renderers[i], tlb, border_color, border_width) elif i 3: # Radial Farthest Corner renderers[i].SetBackground(center_color) renderers[i].SetBackground2(corner_color) viewport_border(renderers[i], tlbr, border_color, border_width) else: # Vertical renderers[i].SetBackground(bottom_color) renderers[i].SetBackground2(top_color) viewport_border(renderers[i], lb, border_color, border_width) ren_win.AddRenderer(renderers[i]) ren_win.SetInteractor(iren) ren_win.Render() iren.Initialize() iren.UpdateSize(ren_width * 2, ren_height * 2) iren.Start() if __name__ __main__: file_name main()