Read more here:
http://pupi.co/index.php/devlog-feedback/49-helix-toolkit-extensions-updated
Registered PUPPI users can download H3DExtensions from here:
http://pupi.co/index.php/h3dextensions/download-h3dextensions
H3DExtensions provides:
-Easy mesh contour extraction
-Spline generation
-Point cloud editing tools
-Point contour editing tools
-Capped loft generation
-Save mesh to STL
Get the Helix Toolkit here:
https://github.com/helix-toolkit