This Blender plugin generates bezier curves, pipes and ribbons in elaborate weavings, based off of a framework mesh. Tested with Blender 2.80.

Go to Edit > Preferences > Add-ons and click Install.... Select celtic-knot-py, and click the checkbox to enable it.

Select any mesh, then run the plugin from the Add > Curves menu. Then tweak the generation parameters to suit your particular usage.

Further explanation and examples can be found in the wiki on github: https://github.com/boristhebrave/celtic-knot/wiki

Further external reading can be found at:

• http://en.wikipedia.org/wiki/Celtic_knot

• http://www.entrelacs.net/-Celtic-Knotwork-The-ultimate-tutorial

This code is licensed under the MIT License copyright Adam Newgas 2013.