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java.lang.Objectorg.jbox2d.dynamics.joints.Joint
org.jbox2d.dynamics.joints.RopeJoint
public class RopeJoint
A rope joint enforces a maximum distance between two points on two bodies. It has no other effect. Warning: if you attempt to change the maximum length during the simulation you will get some non-physical behavior. A model that would allow you to dynamically modify the length would have some sponginess, so I chose not to implement it that way. See DistanceJoint if you want to dynamically control length.
| Field Summary |
|---|
| Fields inherited from class org.jbox2d.dynamics.joints.Joint |
|---|
m_bodyA, m_bodyB, m_edgeA, m_edgeB, m_islandFlag, m_next, m_prev, m_userData, pool |
| Constructor Summary | |
|---|---|
protected |
RopeJoint(IWorldPool worldPool,
RopeJointDef def)
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| Method Summary | |
|---|---|
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. |
LimitState |
getLimitState()
|
Vec2 |
getLocalAnchorA()
|
Vec2 |
getLocalAnchorB()
|
float |
getMaxLength()
|
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(SolverData data)
|
void |
setMaxLength(float maxLength)
|
boolean |
solvePositionConstraints(SolverData data)
This returns true if the position errors are within tolerance. |
void |
solveVelocityConstraints(SolverData data)
|
| Methods inherited from class org.jbox2d.dynamics.joints.Joint |
|---|
create, destroy, destructor, getBodyA, getBodyB, getCollideConnected, getNext, getType, getUserData, isActive, setUserData |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
|---|
protected RopeJoint(IWorldPool worldPool,
RopeJointDef def)
| Method Detail |
|---|
public void initVelocityConstraints(SolverData data)
initVelocityConstraints in class Jointpublic void solveVelocityConstraints(SolverData data)
solveVelocityConstraints in class Jointpublic boolean solvePositionConstraints(SolverData data)
Joint
solvePositionConstraints in class Jointpublic void getAnchorA(Vec2 argOut)
Joint
getAnchorA in class Jointpublic void getAnchorB(Vec2 argOut)
Joint
getAnchorB in class Joint
public void getReactionForce(float inv_dt,
Vec2 argOut)
Joint
getReactionForce in class Jointpublic float getReactionTorque(float inv_dt)
Joint
getReactionTorque in class Jointpublic Vec2 getLocalAnchorA()
public Vec2 getLocalAnchorB()
public float getMaxLength()
public void setMaxLength(float maxLength)
public LimitState getLimitState()
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