wellcaffeinated/PhysicsJSArchived
PhysicsJS
PhysicsJS is a JavaScript physics engine and 2D rigid body simulator designed to calculate the collisions, constraints, and dynamics of physical bodies. It functions as a modular physics library for simulating the movement and interaction of circular bodies and convex polygons.
The engine implements constraint-based dynamics to enforce distance and angle constraints between objects, enabling the creation of articulated structures and linked physics. It utilizes impulse-based resolution to handle collisions and prevent objects from passing through one another.
The library provides capabilities for managing dynamic, kinematic, and static bodies, applying environmental forces, and performing spatial queries. It includes tools for analyzing geometric properties and rendering the simulation state to canvas or document elements. It also supports user interaction via mouse and touch events to manipulate bodies within the simulation.
Features
- 2D Rigid Body Physics Engines - Provides a 2D rigid body physics engine for calculating interactions between convex polygons and circular bodies.
- Physics Engines - Compute the dynamics and interactions of physical bodies using configurable integrators and behaviors.
- Rigid Body Dynamics - Calculates the movement and interaction of circular and polygonal bodies to create realistic physical motion.
- Structural Constraint Enforcement - Enforces distance and angle constraints between bodies to create articulated structures and linked physics.
- Constraint-Based Dynamics Engines - Implements a constraint-based dynamics engine to create linked physics and articulated structures.
- Physical Body Management - Tracks physical bodies and manages their movement states as dynamic, kinematic, or static.
- Collision Detection - Identifies overlaps between physical bodies and publishes collision events using optimized search.
- Collision Resolution - Calculates and applies physical responses to resolve overlaps and conserve momentum between colliding objects.
- Mechanical Joint Constraints - Provides distance and angle constraints to link physical bodies into articulated structures.
- Physics Simulation Engines - Functions as a physics simulation engine for calculating physical interactions and dynamics within a JavaScript environment.
- Articulated Body Simulators - Simulates multi-joint articulated chains and rigid body dynamics via distance and angle constraints.
- Sequential Impulse Solvers - Implements sequential impulse solvers to resolve constraints by applying velocity changes to colliding bodies.
- 2D Game Development Foundations - Implements fundamental 2D game mechanics including gravity, collision detection, and articulated body constraints.
- Multi-Phase Collision Detection - Implements a coarse broad-phase search to prune distant objects before performing precise narrow-phase intersection tests.
- Physics World Queries - Performs spatial queries including bounding box overlaps and rule-based filtering to find bodies in the world.
- Interactive Web Experiences - Enables the creation of interactive web experiences where users can manipulate physical objects via mouse and touch.
- User Interaction - Captures mouse and touch events to allow users to grab and manipulate bodies within the simulation.
- Geometric Property Calculations - Computes intrinsic geometric measurements such as area, centroids, and moments of inertia for 2D entities.
- Global Environmental Forces - Implements global physical effects such as constant acceleration for gravity and inverse-square law attraction.
- Interchangeable Integration Schemes - Allows the use of interchangeable mathematical schemes for updating object positions and velocities.
- Numerical Integration Solvers - Provides numerical integration solvers to advance the state of the physical system through discrete time steps.
- Planar Geometric Analysis - Performs planar geometric analysis on convex polygons to compute area and moments of inertia.
- Spatial Partitioning Trees - Uses spatial partitioning structures to organize physical objects and accelerate collision detection.
- Behavioral Logic Injection - Provides a system for attaching modular, reusable rule sets to physics entities to automate movement and interactions.
- Simulation Behavior Injection - Decouples environmental forces and physical laws from the core engine via custom logic injection.
- Web Physics Libraries - Offers a modular collection of simulation logic and mathematical functions for calculating physics in web environments.
- Game Engines - Modular physics engine for web-based game simulations.
- Game Engines and Frameworks - Modular physics engine for JavaScript.
