#include <b2_revolute_joint.h>

Inheritance diagram for b2RevoluteJoint:

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

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

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.

float	GetReferenceAngle () const
	Get the reference angle.

float	GetJointAngle () const
	Get the current joint angle in radians.

float	GetJointSpeed () const
	Get the current joint angle speed in radians per second.

bool	IsLimitEnabled () const
	Is the joint limit enabled?

void	EnableLimit (bool flag)
	Enable/disable the joint limit.

float	GetLowerLimit () const
	Get the lower joint limit in radians.

float	GetUpperLimit () const
	Get the upper joint limit in radians.

void	SetLimits (float lower, float upper)
	Set the joint limits in radians.

bool	IsMotorEnabled () const
	Is the joint motor enabled?

void	EnableMotor (bool flag)
	Enable/disable the joint motor.

void	SetMotorSpeed (float speed)
	Set the motor speed in radians per second.

float	GetMotorSpeed () const
	Get the motor speed in radians per second.

void	SetMaxMotorTorque (float torque)
	Set the maximum motor torque, usually in N-m.

float	GetMaxMotorTorque () const

b2Vec2	GetReactionForce (float inv_dt) const override

float	GetReactionTorque (float inv_dt) const override

float	GetMotorTorque (float inv_dt) const

void	Dump () override
	Dump to b2Log.

void	Draw (b2Draw *draw) const override
	Debug draw this joint.

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

b2JointUserData &	GetUserData ()
	Get the user data pointer.

bool	IsEnabled () const
	Short-cut function to determine if either body is enabled.

bool	GetCollideConnected () const

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

Protected Member Functions
	b2RevoluteJoint (const b2RevoluteJointDef *def)

void	InitVelocityConstraints (const b2SolverData &data) override

void	SolveVelocityConstraints (const b2SolverData &data) override

bool	SolvePositionConstraints (const b2SolverData &data) override

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

Protected Attributes
b2Vec2	m_localAnchorA

b2Vec2	m_localAnchorB

b2Vec2	m_impulse

float	m_motorImpulse

float	m_lowerImpulse

float	m_upperImpulse

bool	m_enableMotor

float	m_maxMotorTorque

float	m_motorSpeed

bool	m_enableLimit

float	m_referenceAngle

float	m_lowerAngle

float	m_upperAngle

int32	m_indexA

int32	m_indexB

b2Vec2	m_rA

b2Vec2	m_rB

b2Vec2	m_localCenterA

b2Vec2	m_localCenterB

float	m_invMassA

float	m_invMassB

float	m_invIA

float	m_invIB

b2Mat22	m_K

float	m_angle

float	m_axialMass

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

b2JointUserData	m_userData

Friends
class	b2Joint

class	b2GearJoint

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 revolute joint constrains two bodies to share a common point while they are free to rotate about the point. The relative rotation about the shared point is the joint angle. You can limit the relative rotation with a joint limit that specifies a lower and upper angle. You can use a motor to drive the relative rotation about the shared point. A maximum motor torque is provided so that infinite forces are not generated.

Member Function Documentation

◆ GetMotorTorque()

float b2RevoluteJoint::GetMotorTorque ( float inv_dt ) const

Get the current motor torque given the inverse time step. Unit is N*m.

◆ GetReactionForce()

b2Vec2 b2RevoluteJoint::GetReactionForce ( float inv_dt ) const

overridevirtual

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

Implements b2Joint.

◆ GetReactionTorque()

float b2RevoluteJoint::GetReactionTorque ( float inv_dt ) const

overridevirtual

Get the reaction torque due to the joint limit given the inverse time step. Unit is N*m.

Implements b2Joint.

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

D:/GitHub/box2d/include/box2d/b2_revolute_joint.h

Public Member Functions

Protected Member Functions

Protected Attributes

Friends

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ GetMotorTorque()

◆ GetReactionForce()

◆ GetReactionTorque()