如何通过C ++在VTK中设置3D地图的边界？

Question

I have a lot of lines and planes which are around, for example, (0.5, 0.5, 0.5) point. Also I have area where they have importance, it's a cube. And lines, planes have possibility to intersect this area, and be outside of it. Can I hide part of all elements, and parts of elements, which are not included in my area? Does Vtk have opportunity to do it very simple? Or I need to do it by myself? I want to write, for example SetBounds(bounds), and after that all what isn't included in cube dissapear.

Answer 1

Try using vtkClipDataSet with the clip-function set to vtkBox . Finally, render the output from the vtkClipDataSet filter.

vtkNew<vtkBox> box;
box->SetBounds(.....); // set the bounds of interest.

vtkNew<vtkClipDataSet> clipper;
clipper->SetInputConnection(....); // set to your data producer
clipper->SetClipFunction(box.GetPointer());

// since clipper will produce an unstructured grid, apply the following to
// extract a  polydata from it.
vtkNew<vtkGeometryFilter> geomFilter;
geomFilter->SetInputConnection(clipper->GetOutputPort());

// now, this can be connected to the mapper.
vtkNew<vtkPolyDataMapper> mapper;
mapper->SetInputConnection(geomFilter->GetOutputPort());