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Box2D
2.2.1
Box2D API Reference for Kobold2D developers
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#include <b2DistanceJoint.h>
Inheritance diagram for b2DistanceJoint: Collaboration 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. | |
Protected Member Functions | |
| b2DistanceJoint (const b2DistanceJointDef *data) | |
| void | InitVelocityConstraints (const b2SolverData &data) |
| void | SolveVelocityConstraints (const b2SolverData &data) |
| bool | SolvePositionConstraints (const b2SolverData &data) |
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 |
Friends | |
| class | b2Joint |
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.
| void b2DistanceJoint::Dump | ( | ) | [virtual] |
Dump joint to dmLog.
Reimplemented from b2Joint.
| b2Vec2 b2DistanceJoint::GetAnchorA | ( | ) | const [virtual] |
Get the anchor point on bodyA in world coordinates.
Implements b2Joint.
| b2Vec2 b2DistanceJoint::GetAnchorB | ( | ) | const [virtual] |
Get the anchor point on bodyB in world coordinates.
Implements b2Joint.
| const b2Vec2& b2DistanceJoint::GetLocalAnchorA | ( | ) | const [inline] |
The local anchor point relative to bodyA's origin.
| const b2Vec2& b2DistanceJoint::GetLocalAnchorB | ( | ) | const [inline] |
The local anchor point relative to bodyB's origin.
| 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::SetDampingRatio | ( | float32 | ratio | ) | [inline] |
Set/get damping ratio.
| void b2DistanceJoint::SetFrequency | ( | float32 | hz | ) | [inline] |
Set/get frequency in Hz.
| 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.
1.7.5 
