A downloadable asset pack for Windows, macOS, and Android

Buy Now$14.99 USD or more

The Rope Minikit is a code pacakge that brings stable rope physics to your Unity3d project. The rope component can be used to simulate simple hanging wires or more advanced setups with pulleys and weights that require active collision detection. The bundled example scene shows how to connect the rope for a physically simulated crane, a rope bridge and set of swings. The rope component is written with performance in mind and many compute intensive tasks are handled by Unity jobs on separate threads accelerated using the Burst compiler.

WebGL demo (no Burst) | Website

Readme & demos for other platforms can be downloaded below


  • Stable rope physics
  • Many tweakable user parameters
  • Rigidbody connections allow interaction with the built-in physics engine
  • Scene view handles for adjusting the spawn curve
  • High performance is achieved using Unity jobs and the Burst compiler
    • Typical performance for the example scene with collisions enabled:
      • ~0.2 ms spent in job threads
      • ~0.7 ms spent on the main thread
    • Typical performance for the example scene with collisions disabled:
      • ~0.15 ms spent in job threads
      • ~0.35 ms spent on the main thread
    • Full source code
    • Example scene contains:
      • Physically simulated crane
      • Rope bridge
      • Swings
      • Mouse interaction script

Current Limitations

  • Collisions work with convex Mesh, Box, Sphere and Capsule colliders only
  • It is difficult to get perfectly stiff ropes unless very small physics time steps are used
  • Rope bridge currently only takes the resting mass of colliding rigidbodies into account,there is no impact effect
  • Scripting knowledge required for creating stable rope suspended platforms other than rope bridges


  • Burst 1.1.2 or above

About the Minikits

Minikits are small, tweakable and extendable packages with full source code that illustrate how to implement interesting behaviours for your project. They're designed to be easy-to-use and self-explanatory.


Buy Now$14.99 USD or more

In order to download this asset pack you must purchase it at or above the minimum price of $14.99 USD. You will get access to the following files:

RopeMinikit.unitypackage 1 MB
Version 1.02

Download demo

README-PDF.pdf 195 kB
Version 1.02
rm_demo_win.zip 17 MB
rm_demo_osx.zip 38 MB
rm_demo_and.apk 17 MB

Development log


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Does this have self-collisions? Or do the ropes not interact with each other / itself

Not in its current state. I have been thinking about adding this but there are no concrete plans. What would you like to use it for?

The ropes in your demo seem like rubber bands.  Do you have a demo with less stretchy ropes please?

(1 edit)

The ropes seem stretchy because the mouse interaction script is infinitely strong and forces the rope to be pulled along no matter its strength. You can take a look at the ropes that are free to swing without the mouse pulling them (the crane for example) for a more realistic scenario. Use the up and down arrow on the keyboard to rotate the drum of the crane. (I should  maybe update the demo and make the mouse less strong as quite a few people comment on this)

That said, it's difficult to get perfectly stiff ropes while keeping the simulation stable, there will always be a small amount of stretch. To increase stiffness, one can a) lower the physics time step b) increase the solver iteration count and/or c) lower the resolution of the rope.

Any chance this would work on Android/Oculus Quest?

(3 edits) (+1)

Actually, the demo scene runs at a solid 60 fps on my old Fairphone 2 (Snapdragon 801), so it should definitely work with the Quest! At least as long as the scenes are not overly complex.

I just had to make sure that I had the Android SDK & NDK Tools installed via Unity Hub and everything worked out-of-the-box :)

Awesome! Thanks for that info!


UPDATE: I've uploaded an .apk file that you can test on your target phone!