vtk - How do I get the bounding box of point data?

Question

How do I get the range of the data set? Also known as the bounding box for the data. The data is read with the StructuredPointsReader.

Answer 1

因为 vtkStructuredPoints（vtkStructuredPointsReader 上的 GetOutput() 类型）是 vtkDataSet 的子类，所以可以使用 vtkDataSet 的 GetBounds(double[6]) 函数。这是一个例子：

  double bounds[6];
  structuredPointsReader->Update();
  structuredPointsReader->GetOutput()->GetBounds(bounds);

  std::cout  << "xmin: " << bounds[0] << " " 
             << "xmax: " << bounds[1] << std::endl
             << "ymin: " << bounds[2] << " " 
             << "ymax: " << bounds[3] << std::endl
             << "zmin: " << bounds[4] << " " 
             << "zmax: " << bounds[5] << std::endl;