PackageBox2D.Dynamics.Joints
Classpublic class b2GearJoint
Inheritanceb2GearJoint Inheritance b2Joint
Sourceb2GearJoint.as

A gear joint is used to connect two joints together. Either joint can be a revolute or prismatic joint. You specify a gear ratio to bind the motions together: coordinate1 + ratio coordinate2 = constant The ratio can be negative or positive. If one joint is a revolute joint and the other joint is a prismatic joint, then the ratio will have units of length or units of 1/length.

Warning: The revolute and prismatic joints must be attached to fixed bodies (which must be body1 on those joints).

See also

b2GearJointDef

Public Methods
 MethodDefined by
  
GetAnchor1():b2Vec2
Get the anchor point on body1 in world coordinates.
b2GearJoint
  
GetAnchor2():b2Vec2
Get the anchor point on body2 in world coordinates.
b2GearJoint
 Inherited
GetBody1():b2Body
Get the first body attached to this joint.
b2Joint
 Inherited
GetBody2():b2Body
Get the second body attached to this joint.
b2Joint
 Inherited
GetNext():b2Joint
Get the next joint the world joint list.
b2Joint
  
GetRatio():Number
Get the gear ratio.
b2GearJoint
  
GetReactionForce(inv_dt:Number):b2Vec2
Get the reaction force on body2 at the joint anchor.
b2GearJoint
  
GetReactionTorque(inv_dt:Number):Number
Get the reaction torque on body2.
b2GearJoint
 Inherited
GetType():int
Get the type of the concrete joint.
b2Joint
 Inherited
GetUserData():*
Get the user data pointer.
b2Joint
 Inherited
SetUserData(data:*):void
Set the user data pointer.
b2Joint
Method detail
GetAnchor1()method
public override function GetAnchor1():b2Vec2

Get the anchor point on body1 in world coordinates.

Returns
b2Vec2
GetAnchor2()method 
public override function GetAnchor2():b2Vec2

Get the anchor point on body2 in world coordinates.

Returns
b2Vec2
GetRatio()method 
public function GetRatio():Number

Get the gear ratio.

Returns
Number
GetReactionForce()method 
public override function GetReactionForce(inv_dt:Number):b2Vec2

Get the reaction force on body2 at the joint anchor.

Parameters
inv_dt:Number

Returns
b2Vec2
GetReactionTorque()method 
public override function GetReactionTorque(inv_dt:Number):Number

Get the reaction torque on body2.

Parameters
inv_dt:Number

Returns
Number



Box2DFlashAS3 r42.