should we implement 4 types of director ?? I think DisplayLinkDirector is enough so we now only support DisplayLinkDirector

Safely cast to a Declaration, or null.

Safely cast to an Unknown, or null.

Bounce Ease

Add contact points for circle to circle collisions. Used by several collision tests.

Returns true if the body has not been added to a space. Note: Static bodies are a subtype of rogue bodies.

Returns true if the body is sleeping.

Returns the length of v.

children getter

observer functions

-------------------------------------------------------------------------*\ * Insert class into group \*----------------------------------------------

When switching from backround to foreground on android, we want the params to be initialized again

helper macro that creates an ccColor4B type

Convert body relative/local coordinates to absolute/world coordinates.

Perform a rectangle query against the spatial index, calling @c func for each potential match.

Helper function for working with contact buffers This used to malloc/realloc memory on the fly but was repurposed.

ParticleSystem - Additive Blending