How to create isolines in 3D for VTK?

Question

Is there a way of visualising isolines in 3D space (x, y and z)?

I am basically trying to show the flow of some points based off the velocities of these points and the example on the VTK website only does this in 2D ( http://www.vtk.org/Wiki/VTK/Examples/Cxx/Visualization/LabelContours ) and I don't know how to adapt this. I have tried replacing the plane variable with a 3D glyph but I am getting a lot of errors and nothing appears in the render window

Answer 1

I am not sure if what you want is an isoline. Because an isoline is defined on a scalar field, which means one attribute at each point. Since you are talking about velocity of points, it seems to me you are dealing with a vector field. In that case, you should not create an isoline, but a streamline instead. Take a look at this example, it might help you.

Answer 2

the vtkContourFilter class works for both 2D and 3D. there is an example here .