NAME
Box2D::b2MouseJoint - Make a point on a body track a specified point.
SYNOPSIS
my $joint = $world->CreateJoint( $joint_def );
$joint->SetTarget( $target );DESCRIPTION
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.
METHODS
GetAnchorA()
Implements Box2D::b2Joint.
Returns a Box2D::b2Vec2
GetAnchorB()
Implements Box2D::b2Joint.
Returns a Box2D::b2Vec2
GetDampingRatio()
Returns a float32
GetFrequency()
Returns a float32
GetMaxForce()
Returns a float32
GetReactionForce( $inv_dt )
Implements Box2D::b2Joint.
Parameters:
float32$inv_dt
Returns a Box2D::b2Vec2
GetReactionTorque( $inv_dt )
Implements Box2D::b2Joint.
Parameters:
float32$inv_dt
Returns a float32
GetTarget()
Returns a Box2D::b2Vec2
SetDampingRatio( $ratio )
Set/get the damping ratio (dimensionless).
Parameters:
float32$ratio
SetFrequency( $hz )
Set/get the frequency in Hertz.
Parameters:
float32$hz
SetMaxForce( $force )
Set/get the maximum force in Newtons.
Parameters:
float32$force
SetTarget( $target )
Use this to update the target point.
Parameters:
Box2D::b2Vec2$target
SEE ALSO
BUGS
See "BUGS" in Box2D