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NAME

Box2D::b2DistanceJoint - Constrains two bodies at a fixed distance.

SYNOPSIS

my \$joint = \$world->CreateJoint( \$joint_def );
my \$anchor_a = \$joint->GetAnchorA();
my \$anchor_b = \$joint->GetAnchorB();

DESCRIPTION

A distance joint constrains two points on two bodies to remain at a fixed distance from each other. You can view this as a massless, rigid rod.

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

GetDampingRatio()

Returns a float32

GetFrequency()

Returns a float32

GetLength()

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

SetDampingRatio( \$ratio )

Parameters:

• float32 \$ratio

Parameters:

• float32 \$hz

SetLength( \$length )

Set/get the natural length. Manipulating the length can lead to non-physical behavior when the frequency is zero.

Parameters:

• float32 \$length