|  | Box2D
    2.3.0
    A 2D Physics Engine for Games | 
#include <b2DistanceJoint.h>
 
  
 | 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 | 
| 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) | 
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.
| 
 | virtual | 
Get the reaction force given the inverse time step. Unit is N.
Implements b2Joint.
| 
 | virtual | 
Get the reaction torque given the inverse time step. Unit is N*m. This is always zero for a distance joint.
Implements b2Joint.
| 
 | inline | 
Set/get the natural length. Manipulating the length can lead to non-physical behavior when the frequency is zero.
 1.8.11
 1.8.11