Phyz

Phyz is a work-in-progress physics engine for 2D games, written in Zig. Goals are simplicity, speed and ease of use, in that order.

Progress

• [x] GJK algorithm
• [ ] Continuous collision detection
  • [x] Dynamic-Static
  • [ ] Dynamic-Dynamic
• [x] Fully customizable collision resolution
• [x] Broad phase
• [x] Queries
  • [x] Nearest object
  • [x] Raycast
  • [x] Objects in shape
• [ ] Handle intersecting colliders
• [ ] Collision masking
• [ ] Temporary collider disable flag
• [ ] Collider deletion
• [ ] More interesting actuators
  • [ ] Forcefields/magnetism
  • [ ] Constraints
• [ ] General purpose resolver
  • [ ] Friction
  • [ ] Bounce

Non-goals

To keep the engine simple and fast, a number of things are purposefully not supported:

• Rotation and angular velocity
• Soft bodies
• Non-convex colliders (can be approximated using multiple convex colliders)
• Multiple colliders per object (can be approximated using constraints)

If you need support for these things, I recommend using a more complex physics engine such as Chipmunk2D or Box2D.