Obi is an advanced particle-based physics engine capable of simulating a wide range of deformable material behaviors, capable of running both in the CPU and the GPU. (CPU mode depends on the Burst, Jobs, Collections, and Mathematics packages, GPU mode requires compute shader support).
Obi Rope v7.1.1 (23 Apr 2026) (Latest version)
Obi Rope v7.1 (13 Jun 2025)
Obi Rope v7.0.5 (12 Mar 2025)
Obi Rope v7.0.4 (10 Dec 2024)
Obi Rope v7.0.3 (20 Sep 2024)
Obi Rope v7.0.2 (22 Aug, 2024)
Obi Rope v7.0.1
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With Obi Rope you can create ropes and rods in a matter of seconds, with complete control over their shape and behavior: Oriented particle technology allow rods to offer torsion/twisting effects. Ropes are more lightweight and can be cut/resized. Both can collide with the environment and with each other, and can be attached to rigid bodies.
This system is NOT based on rigid bodies and joints, unlike other rope solutions. This is based on XPBD particles which makes it more lightweight, detailed, and unconditionally stable.
Available for Windows, Mac, iOS and Android.
Links
Obi Website
Community and Support Forum
Features:
– Non-linear, non-destructive rope editing using splines. Get instant feedback on how your rope looks while editing it!.
– Procedural smooth mesh generation using splines, complete with tangent space updating and normal map support. No need to manually generate geometry for your ropes.
– Adaptive curvature-based realtime mesh decimation: straight sections of a rope can generate simpler geometry than curved ones.
– Change rope length at runtime.
– Tearable/cuttable rope.
– Closed loops.
– Two-way rigid body interaction.
– Modular solver: don’t waste performance, only use the constraints your rope needs.
– Per module adjustable solver iteration count.
– Independent stretch/bending stiffness.
– Easy-to-use editor particle tools: selection, brush selection, paintbrush, property smoothing…
– Supports all standard Unity colliders.
– Automatic camera culling: non-visible ropes do not update their simulation.
