NAME
Box2D::b2GearJoint - Connects two joints together.
SYNOPSIS
my $joint = $world->CreateJoint( $joint_def );
$joint->SetRatio( $ratio );DESCRIPTION
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).
METHODS
GetAnchorA()
Get the anchor point on bodyA in world coordinates. Implements Box2D::b2Joint.
Returns a Box2D::b2Vec2
GetAnchorB()
Get the anchor point on bodyB in world coordinates. Implements Box2D::b2Joint.
Returns a Box2D::b2Vec2
GetRatio()
Returns a float32
GetReactionForce( $inv_dt )
Get the reaction force on body2 at the joint anchor in Newtons. Implements Box2D::b2Joint.
Parameters:
float32$inv_dt
Returns a Box2D::b2Vec2
GetReactionTorque( $inv_dt )
Get the reaction torque on body2 in N*m. Implements Box2D::b2Joint.
Parameters:
float32$inv_dt
Returns a float32
SetRatio( $ratio )
Set/Get the gear ratio.
Parameters:
float32$ratio
SEE ALSO
BUGS
See "BUGS" in Box2D