• NAME
• SYNOPSIS
• DESCRIPTION
• METHODS
  • EnableLimit( $flag )
  • EnableMotor( $flag )
  • GetAnchorA()
  • GetAnchorB()
  • GetJointSpeed()
  • GetJointTranslation()
  • GetLowerLimit()
  • GetMotorForce()
  • GetMotorSpeed()
  • GetReactionForce( $inv_dt )
  • GetReactionTorque( $inv_dt )
  • GetUpperLimit()
  • IsLimitEnabled()
  • IsMotorEnabled()
  • SetLimits( $lower, $upper )
  • SetMaxMotorForce( $force )
  • SetMotorSpeed( $speed )
• SEE ALSO
• BUGS
• AUTHORS
• COPYRIGHT & LICENSE

NAME

Box2D::b2PrismaticJoint - Provides one degree of freedom: translation along an axis.

SYNOPSIS

  my $joint = $world->CreateJoint( $joint_def );
  $joint->EnableMotor( 1 );
  $joint->SetMaxMotorForce( $max_force );

DESCRIPTION

A prismatic joint. This joint provides one degree of freedom: translation along an axis fixed in body1. Relative rotation is prevented. You can use a joint limit to restrict the range of motion and a joint motor to drive the motion or to model joint friction.

METHODS

EnableLimit( $flag )

Enable/disable the joint limit.

Parameters:

• bool $flag

EnableMotor( $flag )

Enable/disable the joint motor.

Parameters:

• bool $flag

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

GetJointSpeed()

Get the current joint translation speed, usually in meters per second.

Returns a float32

GetJointTranslation()

Get the current joint translation, usually in meters.

Returns a float32

GetLowerLimit()

Get the lower joint limit, usually in meters.

Returns a float32

GetMotorForce()

Get the current motor force, usually in N.

Returns a float32

GetMotorSpeed()

Get the motor speed, usually in meters per second.

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

GetUpperLimit()

Get the upper joint limit, usually in meters.

Returns a float32

IsLimitEnabled()

Is the joint limit enabled?

Returns a bool

IsMotorEnabled()

Is the joint motor enabled?

Returns a bool

SetLimits( $lower, $upper )

Set the joint limits, usually in meters.

Parameters:

• float32 $lower

• float32 $upper

SetMaxMotorForce( $force )

Set the maximum motor force, usually in N.

Parameters:

• float32 $force

SetMotorSpeed( $speed )

Set the motor speed, usually in meters per second.

Parameters:

• float32 $speed

SEE ALSO

• Box2D

• Box2D::b2PrismaticJointDef

• Box2D::b2Joint

• Box2D::b2World

BUGS

See "BUGS" in Box2D

AUTHORS

See "AUTHORS" in Box2D

COPYRIGHT & LICENSE

See "COPYRIGHT & LICENSE" in Box2D