通过vtk重建三维物体，并显示切片并且改变视点-By vtk reconstructed objects and display slices and change viewpoint

VTK二维图像交互，通过设置不同模式，进行缩放、平移、旋转、窗宽窗位等交互的调整-For the Interactor of 2D image showed with VTK，you can zoom、move、rotate and change windowLevel and windowwide by setting different mode.