b2MotorJoint Class Reference

#include <b2MotorJoint.h>

Inheritance diagram for b2MotorJoint:

Public Member Functions
b2Vec2	GetAnchorA () const
	Get the anchor point on bodyA in world coordinates. More...
b2Vec2	GetAnchorB () const
	Get the anchor point on bodyB in world coordinates. More...
b2Vec2	GetReactionForce (float32 inv_dt) const
	Get the reaction force on bodyB at the joint anchor in Newtons. More...
float32	GetReactionTorque (float32 inv_dt) const
	Get the reaction torque on bodyB in N*m. More...
void	SetLinearOffset (const b2Vec2 &linearOffset)
	Set/get the target linear offset, in frame A, in meters. More...
const b2Vec2 &	GetLinearOffset () const
void	SetAngularOffset (float32 angularOffset)
	Set/get the target angular offset, in radians. More...
float32	GetAngularOffset () const
void	SetMaxForce (float32 force)
	Set the maximum friction force in N. More...
float32	GetMaxForce () const
	Get the maximum friction force in N. More...
void	SetMaxTorque (float32 torque)
	Set the maximum friction torque in N*m. More...
float32	GetMaxTorque () const
	Get the maximum friction torque in N*m. More...
float32	GetCorrectionFactor () const
	Get the correction factor. More...
void	Dump ()
	Dump to b2Log. More...
Public Member Functions inherited from b2Joint
b2JointType	GetType () const
	Get the type of the concrete joint. More...
b2Body *	GetBodyA ()
	Get the first body attached to this joint. More...
b2Body *	GetBodyB ()
	Get the second body attached to this joint. More...
b2Joint *	GetNext ()
	Get the next joint the world joint list. More...
const b2Joint *	GetNext () const
void *	GetUserData () const
	Get the user data pointer. More...
void	SetUserData (void *data)
	Set the user data pointer. More...
bool	IsActive () const
	Short-cut function to determine if either body is inactive. More...
bool	GetCollideConnected () const
virtual void	ShiftOrigin (const b2Vec2 &newOrigin)
	Shift the origin for any points stored in world coordinates. More...

Protected Member Functions
	b2MotorJoint (const b2MotorJointDef *def)
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)
virtual	~b2Joint ()

Protected Attributes
b2Vec2	m_linearOffset
float32	m_angularOffset
b2Vec2	m_linearImpulse
float32	m_angularImpulse
float32	m_maxForce
float32	m_maxTorque
float32	m_correctionFactor
int32	m_indexA
int32	m_indexB
b2Vec2	m_rA
b2Vec2	m_rB
b2Vec2	m_localCenterA
b2Vec2	m_localCenterB
b2Vec2	m_linearError
float32	m_angularError
float32	m_invMassA
float32	m_invMassB
float32	m_invIA
float32	m_invIB
b2Mat22	m_linearMass
float32	m_angularMass
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

Friends
class	b2Joint

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 motor joint is used to control the relative motion between two bodies. A typical usage is to control the movement of a dynamic body with respect to the ground.

Constructor & Destructor Documentation

b2MotorJoint ( const b2MotorJointDef *  def )

protected

Member Function Documentation

void Dump ( )

virtual

Dump to b2Log.

Reimplemented from b2Joint.

b2Vec2 GetAnchorA ( ) const

virtual

Get the anchor point on bodyA in world coordinates.

Implements b2Joint.

b2Vec2 GetAnchorB ( ) const

virtual

Get the anchor point on bodyB in world coordinates.

Implements b2Joint.

float32 GetAngularOffset

(

)

const

float32 GetCorrectionFactor

(

)

const

Get the correction factor.

const b2Vec2 & GetLinearOffset

(

)

const

float32 GetMaxForce

(

)

const

Get the maximum friction force in N.

float32 GetMaxTorque

(

)

const

Get the maximum friction torque in N*m.

b2Vec2 GetReactionForce ( float32  inv_dt ) const

virtual

Get the reaction force on bodyB at the joint anchor in Newtons.

Implements b2Joint.

float32 GetReactionTorque ( float32  inv_dt ) const

virtual

Get the reaction torque on bodyB in N*m.

Implements b2Joint.

void InitVelocityConstraints ( const b2SolverData &  data )

protectedvirtual

Implements b2Joint.

void SetAngularOffset

(

float32

angularOffset

)

Set/get the target angular offset, in radians.

void SetLinearOffset

(

const b2Vec2 &

linearOffset

)

Set/get the target linear offset, in frame A, in meters.

void SetMaxForce

(

float32

force

)

Set the maximum friction force in N.

void SetMaxTorque

(

float32

torque

)

Set the maximum friction torque in N*m.

bool SolvePositionConstraints ( const b2SolverData &  data )

protectedvirtual

Implements b2Joint.

void SolveVelocityConstraints ( const b2SolverData &  data )

protectedvirtual

Implements b2Joint.

Friends And Related Function Documentation

friend class b2Joint

friend

Member Data Documentation

float32 m_angularError

protected

float32 m_angularImpulse

protected

float32 m_angularMass

protected

float32 m_angularOffset

protected

float32 m_correctionFactor

protected

int32 m_indexA

protected

int32 m_indexB

protected

float32 m_invIA

protected

float32 m_invIB

protected

float32 m_invMassA

protected

float32 m_invMassB

protected

b2Vec2 m_linearError

protected

b2Vec2 m_linearImpulse

protected

b2Mat22 m_linearMass

protected

b2Vec2 m_linearOffset

protected

b2Vec2 m_localCenterA

protected

b2Vec2 m_localCenterB

protected

float32 m_maxForce

protected

float32 m_maxTorque

protected

b2Vec2 m_rA

protected

b2Vec2 m_rB

protected

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

• Box2D/Dynamics/Joints/b2MotorJoint.h
• Box2D/Dynamics/Joints/b2MotorJoint.cpp