Box2D: b2Collision.h File Reference

b2Collision.h File Reference

Structures and functions used for computing contact points, distance queries, and TOI queries. More...


Classes
union	b2ContactID
	Contact ids to facilitate warm starting. More...
struct	b2ContactID::Features
	The features that intersect to form the contact point. More...
struct	b2ManifoldPoint
	A manifold point is a contact point belonging to a contact manifold. More...
struct	b2Manifold
	A manifold for two touching convex shapes. More...
struct	b2Segment
	A line segment. More...
struct	b2AABB
	An axis aligned bounding box. More...
struct	b2OBB
	An oriented bounding box. More...
Functions
void	b2CollideCircles (b2Manifold manifold, const b2CircleShape circle1, const b2XForm &xf1, const b2CircleShape *circle2, const b2XForm &xf2)
	Compute the collision manifold between two circles.
void	b2CollidePolygonAndCircle (b2Manifold manifold, const b2PolygonShape polygon, const b2XForm &xf1, const b2CircleShape *circle, const b2XForm &xf2)
	Compute the collision manifold between a polygon and a circle.
void	b2CollidePolygons (b2Manifold manifold, const b2PolygonShape polygon1, const b2XForm &xf1, const b2PolygonShape *polygon2, const b2XForm &xf2)
	Compute the collision manifold between two circles.
float32	b2Distance (b2Vec2 x1, b2Vec2 x2, const b2Shape shape1, const b2XForm &xf1, const b2Shape shape2, const b2XForm &xf2)
	Compute the distance between two shapes and the closest points.
float32	b2TimeOfImpact (const b2Shape shape1, const b2Sweep &sweep1, const b2Shape shape2, const b2Sweep &sweep2)
	Compute the time when two shapes begin to touch or touch at a closer distance.

Structures and functions used for computing contact points, distance queries, and TOI queries.

Compute the distance between two shapes and the closest points.

Returns:: the distance between the shapes or zero if they are overlapped/touching.

Compute the time when two shapes begin to touch or touch at a closer distance.

Returns:: the fraction between [0,1] in which the shapes first touch. fraction=0 means the shapes begin touching/overlapped, and fraction=1 means the shapes don't touch.

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