Unigine::BoundBox Struct

Header:

#include <UnigineMathLibBounds.h>

This structure serves to construct the bounding box in single precision coordinates.

NoticeInstances of this structure are deleted automatically when it is necessary.

In case of double precision coordinates, the bounding box should be constructed by using the WorldBoundBox structure. It includes the same functions as the BoundBox structure, but its functions deal with the double precision coordinates.

NoticeTo support both single and double precision builds, you can use the WorldBoundBox structure only. The engine will automatically substitute it with the BoundBox if it is required.

Methods:

Name	Description View: Sort by:
BoundBox	Constructor.
getCenter	Returns the center point of the current bounding box.
getMin	Returns the minimum coordinates of the bounding box.
getMax	Returns the maximum coordinates of the bounding box.
isValid	Checks the bounding box status.
operator =	Assignment operator for the bounding box.
clear	Clears the bounding box.
set	Sets the bounding box by its minimum and maximum coordinates.
setTransform	Sets the given transformation matrix to the bounding box.
compare	Compares the current bounding box with the given one.
operator ==	Compares the current bounding box with the given one.
operator !=	Bounding boxes not equal comparison operator.
expand	Expands the current bounding box to enclose the given point.
inside	Checks if the given point is inside the bounding box.
insideValid	Checks if the given point is inside the bounding box.
insideAll	Checks if the given bounding sphere is inside the current bounding box.
insideAllValid	Checks if the given bounding sphere is inside the current bounding box.
insideCube	Checks if a face of the current bounding box is inside the cube represented by minimum and maximum coordinates of the bounding box.
rayIntersection	Checks for an intersection between a ray and the current bounding box.
irayIntersection	Checks for an intersection between a ray and the current bounding box.
getIntersection	Checks for an intersection between a line and the current bounding box.
rayIntersectionValid	Checks for an intersection between a ray and the current bounding box.
irayIntersectionValid	Checks for an intersection between a ray and the current bounding box.
getIntersectionValid	Checks for an intersection between a line and the current bounding box.
distance	Returns the distance from the origin of coordinates to the closest vertex of the bounding box.
distanceValid	Returns the distance from the origin of coordinates to the closest vertex of the bounding box.
getPoints	Puts the vertices of the current bounding box into the given vector.
getPlanes	Puts the planes created based on the vertices of the current bounding box into the given vector.

BoundBox Class

Members

BoundBox ( ) #

Constructor. Creates an empty bounding box.

BoundBox ( const BoundBox & bb ) #

Initialization by the bounding box.

Arguments

const BoundBox & bb - Bounding box.

explicit BoundBox ( const BoundSphere & bs ) #

Initialization by the bounding sphere.

Arguments

const BoundSphere & bs - Bounding sphere.

BoundBox ( const BoundBox & bb, const Math::mat4 & transform ) #

Initialization by the bounding box with the transformation matrix taken into account.

Arguments

const BoundBox & bb - Bounding box.
const Math::mat4 & transform - Transformation matrix.

BoundBox ( const Math::vec3 * points, int num_points ) #

Initialization by the vector of points.

Arguments

const Math::vec3 * points - Vector of points.
int num_points - Number of points.

BoundBox ( const Math::vec3 & min, const Math::vec3 & max ) #

Initialization by minimum and maximum coordinates of the bounding box.

Arguments

const Math::vec3 & min - Bounding box minimum coordinates.
const Math::vec3 & max - Bounding box maximum coordinates.

BoundBox & operator= ( const BoundBox & bb ) #

Assignment operator for the bounding box.

Arguments

const BoundBox & bb - Bounding box.

Return value

Bounding box.

void clear ( ) #

Clears the bounding box.

void set ( const Math::vec3 & min, const Math::vec3 & max ) #

Sets the bounding box by its minimum and maximum coordinates.

Arguments

const Math::vec3 & min - Minimum coordinates of the bounding box.
const Math::vec3 & max - Maximum coordinates of the bounding box.

void set ( const Math::vec3 * points, int num_points ) #

Sets the bounding box by the coordinates of points in space to be enclosed by it.

Arguments

const Math::vec3 * points - List of points to be enclosed by the bounding box.
int num_points - Number of points to be enclosed by the bounding box.

void set ( const BoundSphere & bs ) #

Sets the bounding box by the bounding sphere.

Arguments

const BoundSphere & bs - Bounding sphere.

void set ( const BoundBox & bb ) #

Sets the bounding box equal to the specified source bounding box.

Arguments

const BoundBox & bb - Source bounding box.

void set ( const BoundBox & bb, const Math::mat4 & transform ) #

Sets the bounding box by the given bounding box with the given transformation matrix taken into account.

Arguments

const BoundBox & bb - Bounding box.
const Math::mat4 & transform - Transformation matrix.

void setTransform ( const Math::mat4 & transform ) #

Sets the given transformation matrix to the bounding box.

Arguments

const Math::mat4 & transform - Transformation matrix.

void setTransform ( const Math::dmat4 & transform ) #

Sets the given transformation matrix to the bounding box.

Arguments

const Math::dmat4 & transform - Transformation matrix.

void setTransform ( const BoundSphere & bs, const Math::mat4 & transform ) #

Sets the transformation matrix of the current bounding box for including the given bounding sphere with the given transformation matrix taken into account.

Arguments

const BoundSphere & bs - Bounding sphere.
const Math::mat4 & transform - Transformation matrix.

void setTransform ( const BoundSphere & bs, const Math::dmat4 & transform ) #

Sets the transformation matrix of the current bounding box for including the given bounding sphere with the given transformation matrix taken into account.

Arguments

const BoundSphere & bs - Bounding sphere.
const Math::dmat4 & transform - Transformation matrix.

int compare ( const BoundBox & bb ) const#

Compares the current bounding box with the given one.

Arguments

const BoundBox & bb - The bounding box to compare with.

Return value

true if the size and position of both bounding boxes are equal; otherwise, false.

int operator== ( const BoundBox & bb ) const#

Compares the current bounding box with the given one.

Arguments

const BoundBox & bb - The bounding box to compare with.

Return value

true if the size and position of both bounding boxes are equal; otherwise, false.

int operator!= ( const BoundBox & bb ) const#

Bounding boxes not equal comparison operator.

Arguments

const BoundBox & bb - The bounding box to compare with.

Return value

true if the size and position of both bounding boxes are not equal; otherwise, false.

void expand ( const Math::vec3 & point ) #

Expands the current bounding box to enclose the given point.

Arguments

const Math::vec3 & point - Point coordinates.

void expand ( const Math::vec3 * points, int num_points ) #

Expands the current bounding box to enclose all given points.

Arguments

const Math::vec3 * points - List of points to be enclosed by the bounding box.
int num_points - Number of points to be enclosed by the bounding box.

void expand ( const BoundSphere & bs ) #

Expands the current bounding box to enclose the given bounding sphere.

Arguments

const BoundSphere & bs - Bounding sphere.

void expand ( const BoundBox & bb ) #

Expands the current bounding box to enclose the given bounding box.

Arguments

const BoundBox & bb - Bounding box.

bool inside ( const Math::vec3 & point ) const#

Checks if the given point is inside the bounding box.

Arguments

const Math::vec3 & point - Point.

Return value

true if the point is inside the bounding box; otherwise, false.

bool inside ( const Math::vec3 & point, float radius ) const#

Checks if the given sphere is inside the current bounding box.

Arguments

const Math::vec3 & point - Coordinates of the center of the sphere.
float radius - Sphere radius.

Return value

true if the sphere is inside the bounding box; otherwise, false.

bool inside ( const Math::vec3 & min, const Math::vec3 & max ) const#

Checks if the box with the given coordinates is inside the current bounding box.

Arguments

const Math::vec3 & min - Minimum coordinates of the box.
const Math::vec3 & max - Maximum coordinates of the box.

Return value

true if the box is inside the bounding box; otherwise, false.

bool inside ( const BoundSphere & bs ) const#

Checks if the specified bounding sphere is inside the current bounding box.

Arguments

const BoundSphere & bs - Bounding sphere.

Return value

true if the bounding sphere is inside the bounding box; otherwise, false.

bool inside ( const BoundBox & bb ) const#

Checks if the specified bounding box is inside the current bounding box.

Arguments

const BoundBox & bb - Bounding box.

Return value

true if the bounding box is inside the bounding box; otherwise, false.

bool insideValid ( const Math::vec3 & point ) const#

Checks if the given point is inside the bounding box.

NoticeThe method doesn't check if the minimum and maximum coordinates of the current bounding box are valid.

Arguments

const Math::vec3 & point - Point.

Return value

true if the point is inside the bounding box; otherwise, false.

bool insideValid ( const Math::vec3 & point, float radius ) const#

Checks if the sphere is inside the bounding box.

NoticeThe method doesn't check if the minimum and maximum coordinates of the current bounding box are valid.

Arguments

const Math::vec3 & point - Coordinates of the center of the sphere.
float radius - Sphere radius.

Return value

true if the sphere is inside the bounding box; otherwise, false.

bool insideValid ( const Math::vec3 & min, const Math::vec3 & max ) const#

Checks if the box is inside the bounding box.

NoticeThe method doesn't check if the minimum and maximum coordinates of the current bounding box are valid.

Arguments

const Math::vec3 & min - Box minimum coordinates.
const Math::vec3 & max - Box maximum coordinates.

Return value

true if the box is inside the bounding box; otherwise, false.

bool insideValid ( const BoundSphere & bs ) const#

Checks if the bounding sphere is inside the bounding box.

NoticeThe method doesn't check if the minimum and maximum coordinates of the current bounding box are valid.

Arguments

const BoundSphere & bs - Bounding sphere.

Return value

true if the bounding sphere is inside the bounding box; otherwise, false.

bool insideValid ( const BoundBox & bb ) const#

Checks if the bounding box is inside the bounding box.

NoticeThe method doesn't check if the minimum and maximum coordinates of the current bounding box are valid.

Arguments

const BoundBox & bb - Bounding box.

Return value

true if the bounding box is inside the bounding box; otherwise, false.

bool insideAll ( const BoundSphere & bs ) const#

Checks if the given bounding sphere is inside the current bounding box.

Arguments

const BoundSphere & bs - Bounding sphere.

Return value

true if the whole bounding sphere is inside the bounding box; otherwise, false.

int insideAll ( const BoundBox & bb ) const#

Checks if the whole given bounding box is inside the current bounding box.

Arguments

const BoundBox & bb - Bounding box.

Return value

true if the whole bounding box is inside the bounding box; otherwise, false.

bool insideAllValid ( const BoundSphere & bs ) const#

Checks if the given bounding sphere is inside the current bounding box.

NoticeThe method doesn't check if the minimum and maximum coordinates of the current bounding box are valid.

Arguments

const BoundSphere & bs - Bounding sphere.

Return value

true if the whole bounding sphere is inside the bounding box; otherwise, false.

bool insideAllValid ( const BoundBox & bb ) const#

Checks if the whole given bounding box is inside the current bounding box.

NoticeThe method doesn't check if the minimum and maximum coordinates of the current bounding box are valid.

Arguments

const BoundBox & bb - Bounding box.

Return value

true if the whole bounding box is inside the bounding box; otherwise, false.

bool insideCube ( int face, const Math::vec3 & offset ) const#

Checks if a face of the current bounding box is inside the cube represented by minimum and maximum coordinates of the bounding box.

Arguments

int face - The face index from 0 to 5.
const Math::vec3 & offset - Offset.

Return value

true if the face is inside the bounding cube; otherwise, false.

bool rayIntersection ( const Math::vec3 & point, const Math::vec3 & direction ) const#

Checks for an intersection between a ray and the current bounding box.

Arguments

const Math::vec3 & point - Starting point of the ray.
const Math::vec3 & direction - Direction vector of the ray.

Return value

true if the given ray intersects the bounding box; otherwise, false.

bool irayIntersection ( const Math::vec3 & point, const Math::vec3 & idirection ) const#

Checks for an intersection between a ray and the current bounding box. This function uses the inverse direction of the ray, which increases performance.

Arguments

const Math::vec3 & point - Starting point of the ray.
const Math::vec3 & idirection - Inverse direction of the ray.

Return value

true if the given ray intersects the bounding box; otherwise, false.

int getIntersection ( const Math::vec3 & p0, const Math::vec3 & p1 ) const#

Checks for an intersection between a line and the current bounding box.

Arguments

const Math::vec3 & p0 - Starting point of the line.
const Math::vec3 & p1 - Enging point of the line.

Return value

true if the given line intersects the bounding box; otherwise, false.

bool rayIntersectionValid ( const Math::vec3 & point, const Math::vec3 & direction ) const#

Checks for an intersection between a ray and the current bounding box.

NoticeThis function doesn't check if the minimum and maximum coordinates of the bounding box are valid.

Arguments

const Math::vec3 & point - Starting point of the ray.
const Math::vec3 & direction - Direction vector of the ray.

Return value

true if the given ray intersects the bounding box; otherwise, false.

bool irayIntersectionValid ( const Math::vec3 & point, const Math::vec3 & idirection ) const#

Checks for an intersection between a ray and the current bounding box. This function uses the inverse direction of the ray, which increases performance.

NoticeThis function doesn't check if the minimum and maximum coordinates of the bounding box are valid.

Arguments

const Math::vec3 & point - Starting point of the ray.
const Math::vec3 & idirection - Inverse direction of the ray.

Return value

true if the given ray intersects the bounding box; otherwise, false.

bool getIntersectionValid ( const Math::vec3 & p0, const Math::vec3 & p1 ) const#

Checks for an intersection between a line and the current bounding box.

NoticeThis function doesn't check if the minimum and maximum coordinates of the bounding box are valid.

Arguments

const Math::vec3 & p0 - Starting point of the line.
const Math::vec3 & p1 - Enging point of the line.

Return value

true if the given line intersects the bounding box; otherwise, false.

float distance ( ) const#

Returns the distance from the origin of coordinates to the closest vertex of the bounding box.

Return value

Distance in units, if the minimum and maximum coordinates of the bounding box are valid; otherwise, INF.

float distance ( const Math::vec3 & point ) const#

Returns the distance from the given point to the closest vertex of the bounding box.

Arguments

const Math::vec3 & point - Coordinates of a point.

Return value

Distance, in units.

float distanceValid ( ) const#

Returns the distance from the origin of coordinates to the closest vertex of the bounding box.

Return value

Distance, in units.

float distanceValid ( const Math::vec3 & point ) const#

Returns the distance from the given point to the closest vertex of the bounding box.

Arguments

const Math::vec3 & point - Point.

Return value

Distance, in units.

void getPoints ( vec3 * points, int num_points ) const#

Puts the vertices of the current bounding box into the given vector.

Arguments

vec3 * points - Target vector.
int num_points - Number of points, must be equal to 8.

void getPlanes ( vec4 * planes, int num_planes ) const#

Puts the planes created based on the vertices of the current bounding box into the given vector.

Arguments

vec4 * planes - Target vector.
int num_planes - Number of planes, must be equal to 6.

vec3 getCenter ( ) const#

Returns the center point of the current bounding box.

Return value

Center point.

Math::vec3 getMin ( ) const#

Returns the minimum coordinates of the bounding box.

Return value

Bounding box minimum coordinates.

Math::vec3 getMax ( ) const#

Returns the maximum coordinates of the bounding box.

Return value

Bounding box maximum coordinates.

bool isValid ( ) const#

Checks the bounding box status.

Return value

true if the bounding box minimum and maximum coordinates are valid; otherwise, false.

Last update: 2021-12-13

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