Package org.jbox2d.dynamics.joints
Class MouseJoint
java.lang.Object
org.jbox2d.dynamics.joints.Joint
org.jbox2d.dynamics.joints.MouseJoint
A mouse joint is used to make a point on a body track a specified world point. This a soft
constraint with a maximum force. This allows the constraint to stretch and without applying huge
forces. NOTE: this joint is not documented in the manual because it was developed to be used in
the testbed. If you want to learn how to use the mouse joint, look at the testbed.
-
Field Summary
FieldsModifier and TypeFieldDescriptionprivate float
private final Vec2
private float
private float
private float
private final Vec2
private int
private float
private float
private final Vec2
private final Vec2
private final Mat22
private float
private final Vec2
private final Vec2
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
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoid
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
float
float
void
getReactionForce
(float invDt, Vec2 argOut) get the reaction force on body2 at the joint anchor in Newtons.float
getReactionTorque
(float invDt) get the reaction torque on body2 in N*m.void
void
setDampingRatio
(float ratio) void
setFrequency
(float hz) void
setMaxForce
(float force) void
boolean
This returns true if the position errors are within tolerance.void
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
-
Field Details
-
m_localAnchorB
-
m_targetA
-
m_frequencyHz
private float m_frequencyHz -
m_dampingRatio
private float m_dampingRatio -
m_beta
private float m_beta -
m_impulse
-
m_maxForce
private float m_maxForce -
m_gamma
private float m_gamma -
m_indexB
private int m_indexB -
m_rB
-
m_localCenterB
-
m_invMassB
private float m_invMassB -
m_invIB
private float m_invIB -
m_mass
-
m_C
-
-
Constructor Details
-
MouseJoint
-
-
Method Details
-
getAnchorA
Description copied from class:Joint
get the anchor point on bodyA in world coordinates.- Specified by:
getAnchorA
in classJoint
-
getAnchorB
Description copied from class:Joint
get the anchor point on bodyB in world coordinates.- Specified by:
getAnchorB
in classJoint
-
getReactionForce
Description copied from class:Joint
get the reaction force on body2 at the joint anchor in Newtons.- Specified by:
getReactionForce
in classJoint
- Parameters:
invDt
-
-
getReactionTorque
public float getReactionTorque(float invDt) Description copied from class:Joint
get the reaction torque on body2 in N*m.- Specified by:
getReactionTorque
in classJoint
- Parameters:
invDt
-- Returns:
-
setTarget
-
getTarget
-
setMaxForce
public void setMaxForce(float force) -
getMaxForce
public float getMaxForce() -
setFrequency
public void setFrequency(float hz) -
getFrequency
public float getFrequency() -
setDampingRatio
public void setDampingRatio(float ratio) -
getDampingRatio
public float getDampingRatio() -
initVelocityConstraints
- Specified by:
initVelocityConstraints
in classJoint
-
solvePositionConstraints
Description copied from class:Joint
This returns true if the position errors are within tolerance.- Specified by:
solvePositionConstraints
in classJoint
- Returns:
-
solveVelocityConstraints
- Specified by:
solveVelocityConstraints
in classJoint
-