在立方体面上应用图像 - VTK

Question

我在visual studio 2010上使用VTK，我想在立方体面上应用图像。

阅读我的图片的代码：

// Read JPG image
vtkSmartPointer<vtkJPEGReader> JPEGReader = vtkSmartPointer<vtkJPEGReader>::New();
JPEGReader->SetFileName(argv[1]);
JPEGReader->Update();

// Image actor
vtkSmartPointer<vtkImageActor> imageActor = vtkSmartPointer<vtkImageActor>::New();
imageActor->GetMapper()->SetInputData(JPEGReader->GetOutput());

设置多维数据集代码：

// Setup cube
vtkSmartPointer<vtkCubeSource> cubeSource = vtkSmartPointer<vtkCubeSource>::New();
cubeSource->Update();
vtkSmartPointer<vtkPolyDataMapper> cubeMapper = vtkSmartPointer<vtkPolyDataMapper>::New();
cubeMapper->SetInputConnection(cubeSource->GetOutputPort());
vtkSmartPointer<vtkActor> cubeActor = vtkSmartPointer<vtkActor>::New();
cubeActor->SetMapper(cubeMapper);
cubeActor->GetProperty()->SetDiffuseColor(.3, .6, .4);

我是怎么做到的？

Answer 1

您需要使用纹理和纹理贴图来实现您想要的效果。我改编了this一个小例子（虽然在python中），它可以帮助你找到一个起点。在这种情况下，vtkTextureMapToPlane不是理想的，因为它只覆盖了立方体的两个面（请查看下图）。但是，我认为vtkTextureMapToBox，如this链接，应该可以做到这一点（我无法使用它，因为我使用的是VTK 5.8）。

代码：

import vtk

# Create a render window
ren = vtk.vtkRenderer()
renWin = vtk.vtkRenderWindow()
renWin.AddRenderer(ren)
renWin.SetSize(480,480)
iren = vtk.vtkRenderWindowInteractor()
iren.SetRenderWindow(renWin)

# Generate a cube 
cube = vtk.vtkCubeSource()

# Read the image data from a file
reader = vtk.vtkJPEGReader()
reader.SetFileName("yourimage.jpg")

# Create texture object
texture = vtk.vtkTexture()
texture.SetInputConnection(reader.GetOutputPort())

#Map texture coordinates
map_to_plane = vtk.vtkTextureMapToPlane()
map_to_plane.SetInputConnection(cube.GetOutputPort())

# Create mapper and set the mapped texture as input
mapper = vtk.vtkPolyDataMapper()
mapper.SetInputConnection(map_to_plane.GetOutputPort())

# Create actor and set the mapper and the texture
actor = vtk.vtkActor()
actor.SetMapper(mapper)
actor.SetTexture(texture)

ren.AddActor(actor)

iren.Initialize()
renWin.Render()
iren.Start()

结果：