APE (Actionscript Physics Engine) is a free AS3 open source 2D physics engine for use in Flash and Flex, released under the MIT License. APE is written and maintained by Alec Cove.
Features:
CircleParticles
-fixed or non-fixed
-variable mass, elasticity, and surface friction
RectangleParticles
-rotatable
-fixed or non-fixed
-variable mass, elasticity, and surface friction
WheelParticles
-traction and angular velocity
-fixed or non-fixed
-variable mass, elasticity, and surface friction
SpringConstraints
-stiffness
-collidable or non-collidible
-collidable constraints have variable width and scale
Grouping
-Composite class may contain Particles, and Constraints
-Group class may contain Particles, Constraints, and Composites
Collision
-multisampling
-Static collision tests
Licensing
-non restrictive MIT License
Version 0.45:
Two new properties for much greater stability - constraintCycles and constraintCollisionCycles
Group now takes collideInternal setting as a parameter in the constructor
Fixed a bug where certain particles/constraints would be drawn before their parent hierarchy was added to the engine
Corrected misc documentation errors/omissions
New Demo - Walker robot
