++ed by:
GARU

1 PAUSE user
1 non-PAUSE user.

Jeffrey T. Palmer
and 1 contributors

NAME

Box2D::b2RayCastCallback - Callback class for ray casts.

SYNOPSIS

    package My::RayCastCallback;
    use Box2D;

    use base qw(Box2D::b2RayCastCallback);

    sub ReportFixture {
        my ( $self, $fixture, $point, $normal, $fraction ) = @_;

        # Do something
    }

    1;

DESCRIPTION

Callback class for ray casts. See Box2D::b2World::RayCast.

METHODS

new()

Creates and returns a new Box2D::b2RayCastCallback. This is an inheritance friendly sub so you're free to leave it as default. Remember to call super in your own code, don't forget to call this!

Returns a Box2D::b2RayCastCallback

ReportFixture( $fixture, $point, $normal, $fraction )

Called for each fixture found in the query. You control how the ray cast proceeds by returning a float.

Override this method in your subclass.

Parameters:

  • Box2D::b2Fixture $fixture - the fixture hit by the ray

  • Box2D::b2Vec2 $point - the point of initial intersection

  • Box2D::b2Vec2 $normal - the normal vector at the point of intersection

  • float32 $fraction - the fraction of the distance to the point of intersection

Returns a float32:

  • -1 - to ignore the fixture and continue

  • 0 - to terminate the ray cast

  • $fraction - to clip the ray for closest hit

  • 1 - don't clip the ray and continue

BUGS

See "BUGS" in Box2D

AUTHORS

See "AUTHORS" in Box2D

COPYRIGHT & LICENSE

See "COPYRIGHT & LICENSE" in Box2D

SEE ALSO