=head1 NAME
Box2D::b2GearJointDef - Gear joint definition.
=head1 SYNOPSIS
my $joint_def = Box2D::b2GearJointDef->new();
$joint_def->bodyA( $body_a );
$joint_def->bodyB( $body_b );
$joint_def->joint1( $joint1 );
$joint_def->joint2( $joint2 );
$joint_def->ratio( $ratio );
my $joint = $world->CreateJoint( $joint_def );
=head1 DESCRIPTION
Gear joint definition. This definition requires two existing revolute
or prismatic joints (any combination will work). The provided joints
must attach a dynamic body to a static body.
=head1 METHODS
=head2 new()
Default constructor.
Returns a C<Box2D::b2GearJointDef>
=head2 joint1()
=head2 joint1( $joint1 )
The first revolute/prismatic joint attached to the gear joint.
Parameters:
=over 4
=item * C<Box2D::b2Joint*> C<$joint1> (optional)
=back
Returns a C<Box2D::b2Joint*>
=head2 joint2()
=head2 joint2( $joint2 )
The second revolute/prismatic joint attached to the gear joint.
Parameters:
=over 4
=item * C<Box2D::b2Joint*> C<$joint2> (optional)
=back
Returns a C<Box2D::b2Joint*>
=head2 ratio()
=head2 ratio( $ratio )
The gear ratio.
See also: L<Box2D::b2GearJoint> for explanation.
Parameters:
=over 4
=item * C<float32> C<$ratio> (optional)
=back
Returns a C<float32>
=head1 SEE ALSO
=over 4
=item * L<Box2D>
=item * L<Box2D::b2GearJoint>
=item * L<Box2D::b2JointDef>
=item * L<Box2D::b2World>
=back
=head1 BUGS
See L<Box2D/BUGS>
=head1 AUTHORS
See L<Box2D/AUTHORS>
=head1 COPYRIGHT & LICENSE
See L<Box2D/"COPYRIGHT & LICENSE">
=cut