所以我尝试使用vtk(在python中)渲染2D网格。我有一张单子 包含所有点的元组,以及包含 每个单元格的点。为了试验,我试着创建一个polydata对象 对一个有4个元素的正方形进行渲染,但最后我得到了这样一个结果:
我想它显示连接节点的线(像线框) 而不是实心正方形。。 这是生成上图的代码:
def main2():
#Array of vectors containing the coordinates of each point
nodes = np.array([[0, 0, 0], [1, 0, 0], [2, 0, 0], [2, 1, 0], [2, 2, 0],
[1, 2, 0], [0, 2, 0], [0, 1, 0], [1, 1, 0]])
#Array of tuples containing the nodes correspondent of each element
elements = np.array([(0, 1, 8, 7), (7, 8, 5, 6), (1, 2, 3, 8), (8, 3, 4,
5)])
#Make the building blocks of polyData attributes
Mesh = vtk.vtkPolyData()
Points = vtk.vtkPoints()
Cells = vtk.vtkCellArray()
#Load the point and cell's attributes
for i in range(len(nodes)):
Points.InsertPoint(i, nodes[i])
for i in range(len(elements)):
Cells.InsertNextCell(mkVtkIdList(elements[i]))
#Assign pieces to vtkPolyData
Mesh.SetPoints(Points)
Mesh.SetPolys(Cells)
#Mapping the whole thing
MeshMapper = vtk.vtkPolyDataMapper()
if vtk.VTK_MAJOR_VERSION <= 5:
MeshMapper.SetInput(Mesh)
else:
MeshMapper.SetInputData(Mesh)
#Create an actor
MeshActor = vtk.vtkActor()
MeshActor.SetMapper(MeshMapper)
#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(MeshActor)
renderer.SetActiveCamera(camera)
renderer.ResetCamera()
renderer.SetBackground(1,1,1)
renWin.SetSize(300,300)
#Interact with data
renWin.Render()
iren.Start()
main2()
我还想知道是否有可能有一个网格线作为 渲染窗口的背景,而不是黑色,如下所示:
提前谢谢!在
你可以用MeshActor.GetProperty().SetRepresentationToWireframe()(https://www.vtk.org/doc/nightly/html/classvtkProperty.html#a2a4bdf2f46dc499ead4011024eddde5c)将参与者呈现为线框,或MeshActor.GetProperty().SetEdgeVisibility(True)将其渲染为实体,边渲染为线条。在
关于渲染窗口的背景,我不知道。在
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