cpShape

The cpShape struct defines the shape of a rigid body. More...

Classes
struct	cpNearestPointQueryInfo
	Nearest point query info struct. More...
struct	cpSegmentQueryInfo
	Segment query info struct. More...
struct	cpShape
	Opaque collision shape struct. More...

Typedefs
typedef struct cpNearestPointQueryInfo	cpNearestPointQueryInfo
	Nearest point query info struct.
typedef struct cpSegmentQueryInfo	cpSegmentQueryInfo
	Segment query info struct.

Functions
void	cpShapeDestroy (cpShape *shape)
	Destroy a shape.
void	cpShapeFree (cpShape *shape)
	Destroy and Free a shape.
cpBB	cpShapeCacheBB (cpShape *shape)
	Update, cache and return the bounding box of a shape based on the body it's attached to.
cpBB	cpShapeUpdate (cpShape *shape, cpVect pos, cpVect rot)
	Update, cache and return the bounding box of a shape with an explicit transformation.
cpBool	cpShapePointQuery (cpShape *shape, cpVect p)
	Test if a point lies within a shape.
cpFloat	cpShapeNearestPointQuery (cpShape *shape, cpVect p, cpNearestPointQueryInfo *out)
	Perform a nearest point query. More...
cpBool	cpShapeSegmentQuery (cpShape *shape, cpVect a, cpVect b, cpSegmentQueryInfo *info)
	Perform a segment query against a shape. info must be a pointer to a valid cpSegmentQueryInfo structure.
static cpVect	cpSegmentQueryHitPoint (const cpVect start, const cpVect end, const cpSegmentQueryInfo info)
	Get the hit point for a segment query.
static cpFloat	cpSegmentQueryHitDist (const cpVect start, const cpVect end, const cpSegmentQueryInfo info)
	Get the hit distance for a segment query.
void	cpResetShapeIdCounter (void)
	When initializing a shape, it's hash value comes from a counter. More...

Detailed Description

The cpShape struct defines the shape of a rigid body.

Function Documentation

void cpResetShapeIdCounter

(

void

)

When initializing a shape, it's hash value comes from a counter.

Because the hash value may affect iteration order, you can reset the shape ID counter when recreating a space. This will make the simulation be deterministic.

cpFloat cpShapeNearestPointQuery	(	cpShape *	shape,
		cpVect	p,
		cpNearestPointQueryInfo *	out
	)

Perform a nearest point query.

It finds the closest point on the surface of shape to a specific point. The value returned is the distance between the points. A negative distance means the point is inside the shape.