VTK中的RGrid和SGrid_vtkpolydata到rectilineargrid

开始学习VTK,VTK中的StructuredGrid和RectilinearGrid是不一样的!

RectilinearGrid的设置方式为:

vtkRectilinearGrid *rgrid = vtkRectilinearGrid::New();
    rgrid->SetDimensions(47,33,44);
    rgrid->SetXCoordinates(xCoords);
    rgrid->SetYCoordinates(yCoords);
    rgrid->SetZCoordinates(zCoords);

    // Extract a plane from the grid to see what we've got.
  vtkRectilinearGridGeometryFilter *plane = vtkRectilinearGridGeometryFilter::New();
    plane->SetInput(rgrid);
    plane->SetExtent(0,46, 16,16, 0,43);

  vtkPolyDataMapper *rgridMapper = vtkPolyDataMapper::New();
      rgridMapper->SetInputConnection(plane->GetOutputPort());

rgrid中坐标是一个矩阵，数据设置是要将x坐标、y坐标和z坐标分别传给rgid。

StructuredGrid的设置方式为:
 sgrid->SetPoints(points);
  points->Delete();
  sgrid->GetPointData()->SetVectors(vectors);
  vectors->Delete();

 vtkPolyDataMapper *sgridMapper = vtkPolyDataMapper::New();
      sgridMapper->SetInputConnection(hedgehog->GetOutputPort());
  vtkActor *sgridActor = vtkActor::New();
      sgridActor->SetMapper(sgridMapper);

sgrid则不一样，虽然需要将坐标进行存储，但是是一个一个点存的。
区别好像就这样的。

具体的问题还没摸清楚.