Physics simulations in WebXR enable realistic interactions with objects, improving immersion in virtual environments. Using efficient physics engines is essential to prevent performance issues.
Key Techniques for Physics Interactions in Three.js
- Cannon.js for Rigid Body Dynamics
- Use Cannon.js to apply realistic physics forces, collisions, and interactions.
- Optimize performance by disabling physics calculations for objects at rest.
- Implement sleeping bodies to prevent unnecessary physics updates.
- Ammo.js for Soft Bodies and Ragdolls
- Use Ammo.js for deformable objects, cloth physics, and ragdoll characters.
- Implement skeletal constraints to create lifelike ragdoll effects.
- Constraint-Based Physics
- Use hinge joints, ball sockets, and slider constraints for mechanical interactions.
- Simulate realistic vehicle suspensions using constraint-based physics.
- Optimized Physics Computations
- Offload physics calculations to Web Workers to prevent frame drops.
- Use broad-phase collision detection to ignore unnecessary interactions.
Use Cases in WebXR
- Interactive Training Simulations – Simulate real-world physics for mechanical assembly or medical training.
- VR Puzzle Games – Implement physics-based puzzles that involve stacking, pushing, and moving objects.
- Ragdoll Effects in VR Combat – Improve realism in VR combat scenarios with dynamic ragdoll physics.