Acanvas Physics – for Dart 2.0 and StageXL.

Acanvas Physics is part of a layered architecture (diagram) originally conceived for Actionscript, and has been used in dozens of highly interactive rich media projects (marketing) for clients such as Mercedes-Benz, Nike, and Nikon, serving millions of users.

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Acanvas Physics is a port of Box2DFlash by Matt Bush and John Nessky, which is itself a port of Box2D by Erin Catto.

Collision

• Continuous collision detection.
• Contact callbacks: begin, end, pre-solve, post-solve.
• Convex polyons and circles.
• Multiple shapes per body.
• One-shot contact manifolds.
• Dynamic tree broadphase.
• Efficient pair management.
• Fast broadphase AABB queries.
• Collision groups and categories.

Physics

• Continuous physics with time of impact solver.
• Persistent body-joint-contact graph.
• Island solution and sleep management.
• Contact, friction, and restitution.
• Stable stacking with a linear-time solver.
• Revolute, prismatic, distance, pulley, gear, mouse joint, and other joint types.
• Joint limits, motors, and friction.
• Momentum decoupled position correction.
• Fairly accurate reaction forces/impulses.

The Acanvas Physics Demo is a direct port of the original Box2D library.