PhysicsExamples2D

Batching techniques for queries, projectiles/shooters, and swarm/flocking behaviors (boids)

Collision detection, contact manifolds, collision responses, determinism, and character collision handling

Component authoring patterns and best practices for Unity PhysicsCore2D

High-level patterns and gameplay strategies for destructible objects in Unity PhysicsCore2D — slicing mechanics, fragmenting on impact, sprite-based destructible systems, debris cleanup, performance budgeting. Use for "how should I design destructible X?" questions. For the PhysicsDestructor type API and worked code examples see unity-physicscore2d-destructor; for raw member signatures see unity-physicscore2d-destructor-api.

Factory patterns for creating complex physics objects (ragdolls, soft bodies, vehicles, gears, mechanical systems)

Collision filtering, layer-based interactions, custom collision filters, and trigger areas

Environmental forces (wind), surface forces, and directional force application

Physics material properties including friction, bounciness/restitution, rolling resistance, and surface velocity (conveyor belts)

Performance optimization, benchmarking, capacity testing, and large-scale physics simulations

Advanced shape features including chains, compounds, rounded polygons, ellipses, and runtime geometry modification

Orientation and getting-started guide for Unity 6000.5 PhysicsCore2D — namespace history, distinction from the legacy Physics2D component system, WORM concurrency model, definitions/handle-struct semantics, and routing to the topic and -api sub-skills. Use for first-time onboarding, conceptual questions about how PhysicsCore2D differs from older Physics2D, or when you need a map of which sub-skill covers what. For specific type APIs use the *-api skills; for specific patterns use the matching topic skill (joints, bodies, queries, batching, factories, etc.).

Stacking stability, structural physics (arches, card houses), and domino chain reactions

Authoritative Unity 6000.5 PhysicsCore2D API reference for Bodies. Lists every type, property, field, method (with signatures, params, returns) for: PhysicsBody, PhysicsBodyDefinition. Use whenever working with these types in code.

Patterns for Unity PhysicsCore2D PhysicsBody — choosing body type (Static/Kinematic/Dynamic), creating and destroying bodies, mass and moment of inertia configuration, sleep state management, transform sync between PhysicsBody and Unity Transform, freezing position/rotation via constraints, owner key pattern for ownership, and the WORM rule about creating/destroying bodies during simulation. Use when working with PhysicsBody lifecycle, configuration, or runtime manipulation. For full member API see unity-physicscore2d-bodies-api. For applying forces see unity-physicscore2d-forces. For batched body creation see unity-physicscore2d-batching.

Authoritative Unity 6000.5 PhysicsCore2D API reference for Chains. Lists every type, property, field, method (with signatures, params, returns) for: PhysicsChain, PhysicsChainDefinition. Use whenever working with these types in code.

Authoritative Unity 6000.5 PhysicsCore2D API reference for Composer. Lists every type, property, field, method (with signatures, params, returns) for: PhysicsComposer. Use whenever working with these types in code.

Authoritative Unity 6000.5 PhysicsCore2D API reference for Destructor. Lists every type, property, field, method (with signatures, params, returns) for: PhysicsDestructor. Use whenever working with these types in code.

Authoritative Unity 6000.5 PhysicsCore2D API reference for Events & Callbacks. Lists every type, property, field, method (with signatures, params, returns) for: PhysicsCallbacks, PhysicsEvents. Use whenever working with these types in code.

Authoritative Unity 6000.5 PhysicsCore2D API reference for Geometry Primitives. Lists every type, property, field, method (with signatures, params, returns) for: CapsuleGeometry, ChainGeometry, ChainSegmentGeometry, CircleGeometry, PhysicsAABB, PhysicsPlane, PolygonGeometry, SegmentGeometry. Use whenever working with these types in code.

Authoritative Unity 6000.5 PhysicsCore2D API reference for Helpers. Lists every type, property, field, method (with signatures, params, returns) for: PhysicsRotate, PhysicsTransform, PhysicsUserData. Use whenever working with these types in code.

Authoritative Unity 6000.5 PhysicsCore2D API reference for Joints. Lists every type, property, field, method (with signatures, params, returns) for: PhysicsDistanceJoint, PhysicsDistanceJointDefinition, PhysicsFixedJoint, PhysicsFixedJointDefinition, PhysicsHingeJoint, PhysicsHingeJointDefinition, PhysicsIgnoreJoint, PhysicsIgnoreJointDefinition, PhysicsJoint, PhysicsRelativeJoint, PhysicsRelativeJointDefinition, PhysicsSliderJoint, PhysicsSliderJointDefinition, PhysicsWheelJoint, PhysicsWheelJointDefinition. Use whenever working with these types in code.

Patterns and decision rules for Unity PhysicsCore2D joints — choosing between PhysicsDistanceJoint, PhysicsFixedJoint, PhysicsHingeJoint, PhysicsIgnoreJoint, PhysicsRelativeJoint, PhysicsSliderJoint, PhysicsWheelJoint; tuning motors, limits, springs; anchor placement; breaking joints via force/torque thresholds; common assemblies (pendulums, vehicle suspension, doors, conveyors, bridges, mouse drag, ragdolls). Use when wiring up physical relationships between bodies. For full member API see unity-physicscore2d-joints-api.

Authoritative Unity 6000.5 PhysicsCore2D API reference for Layers & Masks. Lists every type, property, field, method (with signatures, params, returns) for: PhysicsLayers, PhysicsMask. Use whenever working with these types in code.

Authoritative Unity 6000.5 PhysicsCore2D API reference for Math Utilities. Lists every type, property, field, method (with signatures, params, returns) for: PhysicsMath. Use whenever working with these types in code.

Authoritative Unity 6000.5 PhysicsCore2D API reference for Miscellaneous. Lists every type, property, field, method (with signatures, params, returns) for: IPhysicsJoint, PhysicsBuffer, PhysicsBufferPair, PhysicsEditorOnly, PhysicsTransformTweener, PhysicsTransformWatcher, PhysicsTransformWriter, PhysicsWorldRenderer. Use whenever working with these types in code.

Authoritative Unity 6000.5 PhysicsCore2D API reference for Queries. Lists every type, property, field, method (with signatures, params, returns) for: PhysicsQuery. Use whenever working with these types in code.

Patterns for single-shot Unity PhysicsCore2D queries — raycasts (sight lines, ground checks, bullet hit-tests), overlap tests (trigger zones, AOE damage, ground checks), shape casts (projectile sweeps), distance/closest-point queries (AI awareness), and time-of-impact tests. Covers QueryFilter setup, layer masking, sorting hits, and the geometry-vs-world variants. For bulk/batched queries see unity-physicscore2d-batching. For full member API see unity-physicscore2d-queries-api.

Authoritative Unity 6000.5 PhysicsCore2D API reference for Shapes. Lists every type, property, field, method (with signatures, params, returns) for: PhysicsShape, PhysicsShapeDefinition. Use whenever working with these types in code.

Authoritative Unity 6000.5 PhysicsCore2D API reference for World & Simulation. Lists every type, property, field, method (with signatures, params, returns) for: PhysicsConstants, PhysicsCoreSettings2D, PhysicsWorld, PhysicsWorldDefinition. Use whenever working with these types in code.