LeCollisions Namespace Reference

Enumerations
enum	COLLISIONS_RECT_RESULT {   COLLISIONS_RECT_NO_COL = 0x00, COLLISIONS_RECT_LEFT_COL = 0x01, COLLISIONS_RECT_RIGHT_COL = 0x02, COLLISIONS_RECT_TOP_COL = 0x03,   COLLISIONS_RECT_BOTTOM_COL = 0x04 }
	Return values of the collideRectRect routine. More...
enum	COLLISIONS_SPHERE_RESULT { COLLISIONS_SPHERE_NO_COL = 0x00, COLLISIONS_SPHERE_SURFACE = 0x01 }
	Return values of the collideSphereSphere routine. More...
enum	COLLISIONS_BOX_RESULT { COLLISIONS_BOX_NO_COL = 0x00, COLLISIONS_BOX_SIDE = 0x01, COLLISIONS_BOX_EDGE = 0x02, COLLISIONS_BOX_CORNER = 0x03 }
	Return values of the collideSphereBox routine. More...
enum	COLLISIONS_MESH_RESULT { COLLISIONS_MESH_NO_COL = 0x00, COLLISIONS_MESH_SIDE = 0x01, COLLISIONS_MESH_EDGE = 0x02 }
	Return values of the collideSphereMesh routine. More...
enum	COLLISIONS_BOX_TRACE_RESULT {   COLLISIONS_BOX_TRACE_NO_INTER = 0x00, COLLISIONS_BOX_TRACE_LEFT = 0x01, COLLISIONS_BOX_TRACE_RIGHT = 0x02, COLLISIONS_BOX_TRACE_BOTTOM = 0x03,   COLLISIONS_BOX_TRACE_TOP = 0x04, COLLISIONS_BOX_TRACE_BACK = 0x05, COLLISIONS_BOX_TRACE_FRONT = 0x06 }
	Return values of the traceBox routine. More...

Functions
int	collideRectRect (float &ansX, float &ansY, float srcX, float srcY, float srcW, float srcH, float dstX, float dstY, float dstW, float dstH)
	Compute the intersection between two rectangles. More...
int	collideSphereSphere (LeVertex &ans, LeVertex &contact, const LeVertex &pos, float srcRadius, float dstRadius)
	Compute the intersection between two spheres. More...
int	collideSphereBox (LeVertex &ans, LeVertex &contact, const LeVertex &pos, float srcRadius, const LeVertex &dstSize)
	Compute the intersection between a sphere and a box. More...
int	collideSphereMesh (LeVertex &ans, LeVertex &contact, const LeVertex &pos, float srcRadius, const LeMesh *dstMesh)
	Compute the intersection between a sphere and a mesh. More...
int	traceSphere (const LeVertex &pos, float radius, const LeVertex &axis, float &distance)
int	traceBox (const LeVertex &pos, const LeVertex &size, const LeVertex &axis, float &distance)
	Compute the intersection between a casted ray and a box. More...
int	traceMesh (const LeMesh *mesh, const LeAxis &axis, float &distance)
	Compute the intersection between a casted ray and a mesh. More...

Enumeration Type Documentation

enum LeCollisions::COLLISIONS_BOX_RESULT

Return values of the collideSphereBox routine.

Enumerator
COLLISIONS_BOX_NO_COL	No collision has occured
COLLISIONS_BOX_SIDE	Side collision has occured
COLLISIONS_BOX_EDGE	Edge collision has occured
COLLISIONS_BOX_CORNER	Corner collision has occured

enum LeCollisions::COLLISIONS_BOX_TRACE_RESULT

Return values of the traceBox routine.

Enumerator
COLLISIONS_BOX_TRACE_NO_INTER	No intersection has occured
COLLISIONS_BOX_TRACE_LEFT	Intersection with left side (negative x)
COLLISIONS_BOX_TRACE_RIGHT	Intersection with right side (positive x)
COLLISIONS_BOX_TRACE_BOTTOM	Intersection with bottom side (negative y)
COLLISIONS_BOX_TRACE_TOP	Intersection with top side (positive y)
COLLISIONS_BOX_TRACE_BACK	Intersection with back side (negative z)
COLLISIONS_BOX_TRACE_FRONT	Intersection with front side (positive z)

enum LeCollisions::COLLISIONS_MESH_RESULT

Return values of the collideSphereMesh routine.

Enumerator
COLLISIONS_MESH_NO_COL	No collision has occured
COLLISIONS_MESH_SIDE	Side collision has occured
COLLISIONS_MESH_EDGE	Edge collision has occured

enum LeCollisions::COLLISIONS_RECT_RESULT

Return values of the collideRectRect routine.

Enumerator
COLLISIONS_RECT_NO_COL	No collision has occured
COLLISIONS_RECT_LEFT_COL	Left side (negative x) collision has occured
COLLISIONS_RECT_RIGHT_COL	Right side (positive x) collision has occured
COLLISIONS_RECT_TOP_COL	Top side (negative y) collision has occured
COLLISIONS_RECT_BOTTOM_COL	Bottom side (positive y) collision has occured

enum LeCollisions::COLLISIONS_SPHERE_RESULT

Return values of the collideSphereSphere routine.

Enumerator
COLLISIONS_SPHERE_NO_COL	No collision has occured
COLLISIONS_SPHERE_SURFACE	Surface collision has occured

Function Documentation

int LeCollisions::collideRectRect	(	float &	ansX,
		float &	ansY,
		float	srcX,
		float	srcY,
		float	srcW,
		float	srcH,
		float	dstX,
		float	dstY,
		float	dstW,
		float	dstH
	)

Compute the intersection between two rectangles.

Parameters

[out]	ansX	x coordinate of answer / correction vector
[out]	ansY	y coordinate of answer / correction vector
[in]	srcX	x coordinate of source rectangle
[in]	srcY	y coordinate of source rectangle
[in]	srcW	width of source rectangle
[in]	srcH	height of source rectangle
[in]	dstX	x coordinate of destination rectangle
[in]	dstY	y coordinate of destination rectangle
[in]	dstW	width of destination rectangle
[in]	dstH	height of destination rectangle

Returns

intersection type (see COLLISIONS_RECT_RESULT)

int LeCollisions::collideSphereBox	(	LeVertex &	ans,
		LeVertex &	contact,
		const LeVertex &	pos,
		float	srcRadius,
		const LeVertex &	dstSize
	)

Compute the intersection between a sphere and a box.

Parameters

[out]	ans	answer / correction vector
[out]	contact	place of contact vector
[in]	pos	relative position of the sphere to the box center
[in]	srcRadius	radius of source sphere
[in]	dstSize	size of destination box

Returns

place of collision (see COLLISIONS_BOX_RESULT)

int LeCollisions::collideSphereMesh	(	LeVertex &	ans,
		LeVertex &	contact,
		const LeVertex &	pos,
		float	srcRadius,
		const LeMesh *	dstMesh
	)

Compute the intersection between a sphere and a mesh.

Parameters

[out]	ans	answer / correction vector
[out]	contact	place of contact vector
[in]	pos	relative position of the sphere to the mesh center
[in]	srcRadius	radius of source sphere
[in]	dstMesh	pointer to a destination mesh

Returns

place of collision (see COLLISIONS_MESH_RESULT)

int LeCollisions::collideSphereSphere	(	LeVertex &	ans,
		LeVertex &	contact,
		const LeVertex &	pos,
		float	srcRadius,
		float	dstRadius
	)

Compute the intersection between two spheres.

Parameters

[out]	ans	answer / correction vector
[out]	contact	place of contact vector
[in]	pos	relative position of spheres
[in]	srcRadius	radius of source sphere
[in]	dstRadius	radius of destination sphere

Returns

place of collision (see COLLISIONS_SPHERE_RESULT)

int LeCollisions::traceBox	(	const LeVertex &	pos,
		const LeVertex &	size,
		const LeVertex &	axis,
		float &	distance
	)

Compute the intersection between a casted ray and a box.

Parameters

[in]	pos	position of the center of the box
[in]	size	size of the box
[in]	axis	casted ray axis
[out]	distance	distance from axis origin to box surface

Returns

mesh box side or -1 (no intersection) (see)

int LeCollisions::traceMesh	(	const LeMesh *	mesh,
		const LeAxis &	axis,
		float &	distance
	)

Compute the intersection between a casted ray and a mesh.

Parameters

[in]	mesh	pointer to a mesh
[in]	axis	casted ray axis
[out]	distance	distance from axis origin to mesh surface

Returns

mesh triangle index or -1 (no intersection)

int LeCollisions::traceSphere	(	const LeVertex &	pos,
		float	radius,
		const LeVertex &	axis,
		float &	distance
	)