Inheritance diagram for b2DistanceJoint:

Public Member Functions
b2Vec2	GetAnchorA () const
	Get the anchor point on bodyA in world coordinates.

b2Vec2	GetAnchorB () const
	Get the anchor point on bodyB in world coordinates.

b2Vec2	GetReactionForce (float32 inv_dt) const

float32	GetReactionTorque (float32 inv_dt) const

const b2Vec2 &	GetLocalAnchorA () const
	The local anchor point relative to bodyA's origin.

const b2Vec2 &	GetLocalAnchorB () const
	The local anchor point relative to bodyB's origin.

void	SetLength (float32 length)

float32	GetLength () const

void	SetFrequency (float32 hz)
	Set/get frequency in Hz.

float32	GetFrequency () const

void	SetDampingRatio (float32 ratio)
	Set/get damping ratio.

float32	GetDampingRatio () const

void	Dump ()
	Dump joint to dmLog.

Public Member Functions inherited from b2Joint
b2JointType	GetType () const
	Get the type of the concrete joint.

b2Body *	GetBodyA ()
	Get the first body attached to this joint.

b2Body *	GetBodyB ()
	Get the second body attached to this joint.

b2Joint *	GetNext ()
	Get the next joint the world joint list.

const b2Joint *	GetNext () const

void *	GetUserData () const
	Get the user data pointer.

void	SetUserData (void *data)
	Set the user data pointer.

bool	IsActive () const
	Short-cut function to determine if either body is inactive.

bool	GetCollideConnected () const

virtual void	ShiftOrigin (const b2Vec2 &newOrigin)
	Shift the origin for any points stored in world coordinates.

Protected Member Functions
	b2DistanceJoint (const b2DistanceJointDef *data)

void	InitVelocityConstraints (const b2SolverData &data)

void	SolveVelocityConstraints (const b2SolverData &data)

bool	SolvePositionConstraints (const b2SolverData &data)

Protected Member Functions inherited from b2Joint
	b2Joint (const b2JointDef *def)

Protected Attributes
float32	m_frequencyHz

float32	m_dampingRatio

float32	m_bias

b2Vec2	m_localAnchorA

b2Vec2	m_localAnchorB

float32	m_gamma

float32	m_impulse

float32	m_length

int32	m_indexA

int32	m_indexB

b2Vec2	m_u

b2Vec2	m_rA

b2Vec2	m_rB

b2Vec2	m_localCenterA

b2Vec2	m_localCenterB

float32	m_invMassA

float32	m_invMassB

float32	m_invIA

float32	m_invIB

float32	m_mass

Protected Attributes inherited from b2Joint
b2JointType	m_type

b2Joint *	m_prev

b2Joint *	m_next

b2JointEdge	m_edgeA

b2JointEdge	m_edgeB

b2Body *	m_bodyA

b2Body *	m_bodyB

int32	m_index

bool	m_islandFlag

bool	m_collideConnected

void *	m_userData

Additional Inherited Members
Static Protected Member Functions inherited from b2Joint
static b2Joint *	Create (const b2JointDef def, b2BlockAllocator allocator)

static void	Destroy (b2Joint joint, b2BlockAllocator allocator)

Detailed Description

A distance joint constrains two points on two bodies to remain at a fixed distance from each other. You can view this as a massless, rigid rod.

Member Function Documentation

b2Vec2 b2DistanceJoint::GetReactionForce ( float32 inv_dt ) const

virtual

Get the reaction force given the inverse time step. Unit is N.

Implements b2Joint.

float32 b2DistanceJoint::GetReactionTorque ( float32 inv_dt ) const

virtual

Get the reaction torque given the inverse time step. Unit is N*m. This is always zero for a distance joint.

Implements b2Joint.

void b2DistanceJoint::SetLength ( float32 length )

inline

Set/get the natural length. Manipulating the length can lead to non-physical behavior when the frequency is zero.

The documentation for this class was generated from the following files: