Godot 4 Verlet Rope (.NET)

A versatile addon for implementing performant and realistic physics-based ropes in 3D scenes for Godot 4 .NET projects.
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It is an implementation of Verlet Integration for physics ropes on Godot 4.4 .NET similar to the ones seen in Half-Life 2 or generally in Source engine.

This addon allows creation of dynamic and physics-based ropes, specifically offering following specialized nodes to fit different needs:

• VerletRopeSimulated: Customizable and performant node for visual ropes that react to wind, gravity, and collisions with smooth, realistic behavior.
• VerletRopeRigidBody: Node elevating internal rigid bodies for simulation, useful for cases that need ropes to physically interact with and push other objects in the game world.
• And corresponding utility Joint nodes allowing you to connect ropes to custom locations or physical objects limiting their movement.

Features

1. Generation of rope meshes - either 2D ribbons or 3D tube meshes - using tessellation with Catmull-Rom splines.
2. Two variants of rope simulation: fully verlet-based (optionally affected by other bodies) and built-in physics-based (both affects and is affected by other bodies).
3. Integrated joint nodes allowing to connect ropes to other nodes and physical bodies, constraining their movement.
4. Many adjustable parameters: particle & segment counts; lengths & widths; custom simulation rates; wind & gravity forces; customizable damping; customizable visuals; and other fine-tuning settings specific to each rope variant.
5. VisibleOnScreenNotifier3D optional support (integrated and automatic) for performance improvements when required.
6. Simulated advanced performance-friendly slide collisions for VerletRopeSimulated with static mode O(n) and dynamic mode O(n*m) raycasts complexity (n - rope particles, m - affected dynamic bodies).
7. Editor-specific tooling to make ropes configuration easier.
   • Different [Tool] buttons for quick joint creation, rope resets, structure copying and quick configuration presets;
   • Internal meta-stamping for ropes duplication/copy-paste support;
   • Custom editor-collisions for precise rope click-selectors.

Installation

Ensure you have Godot 4.4.1+ .NET and the .NET 8 SDK installed.

1. Download the addon using the latest link.
2. Extract archive by putting addons/verlet_rope_4 folder into your project's addons/ directory.
3. Build the binaries by running .NET build in open Godot project.
4. Enable the plugin in the project settings.

Examples