我试图修改放置在vtkAppendPolyData
中的每个对象的颜色,但是我得到了奇怪的颜色。我的意思是物体不是一种颜色,但它的每一面都有不同的颜色
我想要一种颜色的物体。 以下是最简单的示例:
import vtk
sphereSource = vtk.vtkSphereSource()
sphereSource.SetCenter(5,0,0)
sphereSource.Update()
Colors = vtk.vtkUnsignedCharArray()
Colors.SetNumberOfComponents(3)
Cellarray = sphereSource.GetOutput().GetPolys().GetNumberOfCells()
Colors.SetNumberOfTuples(Cellarray)
for c in range(Cellarray):
Colors.InsertNextTuple3(255, 0, 0)
sphereSource.GetOutput().GetCellData().SetScalars(Colors)
sphereSource.Update()
coneSource =vtk.vtkConeSource()
coneSource.Update()
Colors = vtk.vtkUnsignedCharArray()
Colors.SetNumberOfComponents(3)
Cellarray = coneSource.GetOutput().GetPolys().GetNumberOfCells()
Colors.SetNumberOfTuples(Cellarray)
for c in range(Cellarray):
Colors.InsertNextTuple3(0, 255, 0)
coneSource.GetOutput().GetCellData().SetScalars(Colors)
coneSource.Update()
# Append the two meshes
appendFilter = vtk.vtkAppendPolyData()
appendFilter.AddInputData(sphereSource.GetOutput())
appendFilter.AddInputData(coneSource.GetOutput())
appendFilter.Update()
# Remove any duplicate points.
cleanFilter = vtk.vtkCleanPolyData()
cleanFilter.SetInputConnection(appendFilter.GetOutputPort())
cleanFilter.Update()
# Create a mapper and actor
mapper = vtk.vtkPolyDataMapper()
# mapper.ScalarVisibilityOn()
mapper.SetInputConnection(cleanFilter.GetOutputPort())
mapper.SetColorModeToDirectScalars()
actor = vtk.vtkActor()
actor.SetMapper(mapper)
# Create a renderer, render window, and interactor
renderer = vtk.vtkRenderer()
renderWindow = vtk.vtkRenderWindow()
renderWindow.AddRenderer(renderer)
renderWindowInteractor = vtk.vtkRenderWindowInteractor()
renderWindowInteractor.SetRenderWindow(renderWindow)
# Add the actors to the scene
renderer.AddActor(actor)
renderer.SetBackground(.3, .2, .1) # Background color dark red
# Render and interact
renderWindow.Render()
renderWindowInteractor.Start()
设置元组数时,应使用
InsertTuple3
而不是InsertNextTuple3
,如下所示:请注意
Insert
在这里是一个容易混淆的名称,因为它不会更改全局大小,并且会覆盖给定的索引。更像是一种Set
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