Happy World Knot-Tying Day! In tribute to Clifford Ashley I’ve put together a preview for the upcoming mobile app, Knot Right. This preview presents the two knots of his namesake, the Ashley Stopper (ABoK #526) and Ashley’s Bend (ABoK #1452).
I hope everyone enjoys this small demonstration of the True Cordage system, where digital knot education uses physically realistic ropes to assist in the learning experience. Many features and enhancements are planned or actively in development and I hope to release the full mobile app on Android and iOS in the near future.
Nice! The information is presented well. The swoopy lines add to the experience. I was going to say: it would be nice if you could rotate the knot, though. But then I went back to check and you could.
How does the True Cordage system work? Would you be releasing it as a library?
Thank you! I’d like to release it for others, especially open source, but also this project now has a financial weight to it I hope to resolve. What was originally planned as a free public good now needs to have a basic free version and another complete version that helps fund development.
As for how it works, it is a few difference approaches combined to solve for direct dynamic spline manipulations to get the desired interpolation. Broadly, cordage can be manipulated and composed so that simple controllers are used when the topology is in a simple state, and proportionally complex as the form develops.
The app is developed in Unity, while the True Cordage system is a separate C# DLL. If it continues to mature into a web experience I’d also port this to JS for use with 3D browser libraries too.