[vtkusers] Creating a surface with three or more points

Totte Karlsson tottek at gmail.com
Fri Aug 8 15:06:39 EDT 2014

I seem to got stuck on something seeming very basic. I need to create a
surface (that I can render) from an arbitrary number of 3D points, typically
less than 5-6 points. I'll use it to visualize 'planes' in molecular

The first geometry I am trying out is just the faces of a cube, i.e from 8
points creating the 6 faces of the cube. But seem to get stuck..

I started to create each plane and was using delaunay2d (part of the problem
I believe)

Code looking like this
    vtkSmartPointer<vtkPolyData> polydata = 

    // Triangulate the grid points
    vtkSmartPointer<vtkDelaunay2D> delaunay =

    // Create a mapper and actor
    vtkSmartPointer<vtkPolyDataMapper> triangulatedMapper = GetMapper();

    vtkSmartPointer<vtkActor> triangulatedActor =   GetActor();

where mPoints contain 4 points defining one cube face.

However, the above only works for the planes that are perpendicular to the z

How to construct the other 4 planes? The ones parallel to the z-axes? 

I guess I should not need to use triangulation at all here, but I seem not
be able to find a simple example on how to just create and render a plane
from 4 points.


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