AABB

Category: Built-In Types

Brief Description

Axis-Aligned Bounding Box.

Member Functions

AABB	AABB ( Vector3 pos, Vector3 size )
bool	encloses ( AABB with )
AABB	expand ( Vector3 to_point )
float	get_area ( )
Vector3	get_endpoint ( int idx )
Vector3	get_longest_axis ( )
int	get_longest_axis_index ( )
float	get_longest_axis_size ( )
Vector3	get_shortest_axis ( )
int	get_shortest_axis_index ( )
float	get_shortest_axis_size ( )
Vector3	get_support ( Vector3 dir )
AABB	grow ( float by )
bool	has_no_area ( )
bool	has_no_surface ( )
bool	has_point ( Vector3 point )
AABB	intersection ( AABB with )
bool	intersects ( AABB with )
bool	intersects_plane ( Plane plane )
bool	intersects_segment ( Vector3 from, Vector3 to )
AABB	merge ( AABB with )

Member Variables

• Vector3 end - Ending corner.
• Vector3 pos - Position (starting corner).
• Vector3 size - Size from position to end.

Description

AABB provides an 3D Axis-Aligned Bounding Box. It consists of a position, a size, and several utility functions. It is typically used for simple (fast) overlap tests.

Member Function Description

AABB AABB ( Vector3 pos, Vector3 size )

Optional constructor, accepts position and size.

bool encloses ( AABB with )

Return true if this AABB completely encloses another one.

AABB expand ( Vector3 to_point )

Return this AABB expanded to include a given point.

float get_area ( )

Get the area of the AABB.

Vector3 get_endpoint ( int idx )

Get the position of the 8 endpoints of the AABB in space.

Vector3 get_longest_axis ( )

Return the normalized longest axis of the AABB.

int get_longest_axis_index ( )

Return the index of the longest axis of the AABB (according to Vector3::AXIS* enum).

float get_longest_axis_size ( )

Return the scalar length of the longest axis of the AABB.

Vector3 get_shortest_axis ( )

Return the normalized shortest axis of the AABB.

int get_shortest_axis_index ( )

Return the index of the shortest axis of the AABB (according to Vector3::AXIS* enum).

float get_shortest_axis_size ( )

Return the scalar length of the shortest axis of the AABB.

Vector3 get_support ( Vector3 dir )

Return the support point in a given direction. This is useful for collision detection algorithms.

AABB grow ( float by )

Return a copy of the AABB grown a given amount of units towards all the sides.

bool has_no_area ( )

Return true if the AABB is flat or empty.

bool has_no_surface ( )

Return true if the AABB is empty.

bool has_point ( Vector3 point )

Return true if the AABB contains a point.

AABB intersection ( AABB with )

Return the intersection between two AABB. An empty AABB (size 0,0,0) is returned on failure.

bool intersects ( AABB with )

Return true if the AABB overlaps with another.

bool intersects_plane ( Plane plane )

Return true if the AABB is at both sides of a plane.

bool intersects_segment ( Vector3 from, Vector3 to )

Return true if the AABB intersects the line segment between from and to

AABB merge ( AABB with )

Combine this AABB with another, a larger one is returned that contains both.