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java.lang.Objectorg.jbox2d.dynamics.joints.Joint
org.jbox2d.dynamics.joints.DistanceJoint
public class DistanceJoint
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.
Field Summary | |
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float |
m_bias
|
float |
m_dampingRatio
|
float |
m_frequencyHz
|
float |
m_gamma
|
float |
m_impulse
|
float |
m_length
|
Vec2 |
m_localAnchor1
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Vec2 |
m_localAnchor2
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float |
m_mass
|
Vec2 |
m_u
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Fields inherited from class org.jbox2d.dynamics.joints.Joint |
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m_bodyA, m_bodyB, m_collideConnected, m_edgeA, m_edgeB, m_islandFlag, m_next, m_prev, m_type, m_userData, pool |
Constructor Summary | |
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DistanceJoint(IWorldPool argWorld,
DistanceJointDef def)
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Method Summary | |
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void |
getAnchorA(Vec2 argOut)
get the anchor point on bodyA in world coordinates. |
void |
getAnchorB(Vec2 argOut)
get the anchor point on bodyB in world coordinates. |
float |
getDampingRatio()
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float |
getFrequency()
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float |
getLength()
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void |
getReactionForce(float inv_dt,
Vec2 argOut)
get the reaction force on body2 at the joint anchor in Newtons. |
float |
getReactionTorque(float inv_dt)
get the reaction torque on body2 in N*m. |
void |
initVelocityConstraints(TimeStep step)
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void |
setDampingRatio(float damp)
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void |
setFrequency(float hz)
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void |
setLength(float argLength)
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boolean |
solvePositionConstraints(float baumgarte)
This returns true if the position errors are within tolerance. |
void |
solveVelocityConstraints(TimeStep step)
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Methods inherited from class org.jbox2d.dynamics.joints.Joint |
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create, destroy, destructor, getBodyA, getBodyB, getNext, getType, getUserData, IsActive, setUserData |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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public final Vec2 m_localAnchor1
public final Vec2 m_localAnchor2
public final Vec2 m_u
public float m_impulse
public float m_mass
public float m_length
public float m_frequencyHz
public float m_dampingRatio
public float m_gamma
public float m_bias
Constructor Detail |
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public DistanceJoint(IWorldPool argWorld, DistanceJointDef def)
Method Detail |
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public void setFrequency(float hz)
public float getFrequency()
public float getLength()
public void setLength(float argLength)
public void setDampingRatio(float damp)
public float getDampingRatio()
public void getAnchorA(Vec2 argOut)
Joint
getAnchorA
in class Joint
public void getAnchorB(Vec2 argOut)
Joint
getAnchorB
in class Joint
public void getReactionForce(float inv_dt, Vec2 argOut)
Joint
getReactionForce
in class Joint
public float getReactionTorque(float inv_dt)
Joint
getReactionTorque
in class Joint
public void initVelocityConstraints(TimeStep step)
initVelocityConstraints
in class Joint
public void solveVelocityConstraints(TimeStep step)
solveVelocityConstraints
in class Joint
public boolean solvePositionConstraints(float baumgarte)
Joint
solvePositionConstraints
in class Joint
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