A 2D verlet integration based rope simulation for Godot 4.3+.

The computation-heavy simulation part is written in C++ using GDExtension, the rest in GDScript. This allows for fast processing and easy extendability, while keeping the code readable.

The last Godot 3.x version can be found on the 3.x branch, however, this version is no longer maintained.

If you like this plugin and want to support my work, consider leaving a tip on Ko-fi.

1. Download the addon
   • From the Asset Library
   • From the Beta Asset Store
   • From the Release Page
   • From GitHub Actions (for preview builds mostly)
2. Move addons/ropesim to your project's addons/ directory
3. Enable the addon in the project settings
4. Possibly restart Godot

The following nodes exist:

• Rope: The basic rope node. Optionally renders the rope using draw_polyline().
• RopeAnchor: Always snaps to the specified position on the target rope. Optionally, also adapts to the rope's curvature. Can be used to attach objects to a rope.
• RopeHandle: A handle that can be used to control, animate, or fixate parts of the rope.
• RopeRendererLine2D: Renders a target rope using Line2D.
• RopeCollisionShapeGenerator: Can be used e.g. in an Area2D to detect collisions with the target rope.
• RopeInteraction: Handles mutual interaction of a target node with a rope. Useful for rope grabbing or pulling mechanics where an object should be able to affect the rope and vice-versa.

NOTE: All rope related tools automatically pause themselves when their target rope is paused to reduce computation costs and improve performance.

Use the in-engine help to view the full documentation for each node.

The project includes various example scenes in addons/ropesim/rope_examples/ that demonstrate the features of this plugin. See also the showcase video for a basic usage example.

When one of the above nodes is selected, a "Ropesim" menu appears in the editor toolbar with the following options:

• Preview in Editor: Toggle live preview in the editor on or off.
• Reset Rope: Reset the selected rope to its resting position.

• Collisions Documentation
• Execution Order Documentation
• Developing

See FAQ.

A quick overview of how to use each node.

ropesim_showcase.mp4

Jellyfish with rope simulated tentacles.

jelly.final_4M.mp4

More advanced usage examples.

Ropesim.Advanced.Examples.mp4

Collisions with physics bodies

rope.collisions.demo.mp4