GREngine.Core.Physics2D.CollisionSystem Class Reference

Inheritance diagram for GREngine.Core.Physics2D.CollisionSystem:

Collaboration diagram for GREngine.Core.Physics2D.CollisionSystem:

Public Member Functions
	CollisionSystem (Game game)
override void	Update (GameTime gameTime)
bool	AABBOverlap (AABB a, AABB b)
	Tests whether two AABB's overlap.
AABB	GetCombinedAABBRegion (AABB a, AABB b)
	Creates a new AABB that represents the AABB that the two given AABB's cover (AABB Union)
AABB	GetAABBOverlapRegion (AABB a, AABB b)
	Creates a new AABB that represents where 2 given AABB's overlap (AABB Intersection)
bool	PointIsInAABB (PointF p, AABB aabb)
bool	LinesSegmentsOverlap (PointF a1, PointF a2, PointF b1, PointF b2)
	Checks whether the AABB's of two line segments overlap (hence potential intersection)
bool	LinesCanIntersect (Line l1, Line l2)
	This simply checks if two Lines can intersect since their gradients are not the same.
PointF	LineIntersectionPoint (Line l1, Line l2)
	Will take two lines that will intersect, and finds their intersection point.
bool	IntersectionIsWithinLineSegments (PointF intersection, PointF a1, PointF a2, PointF b1, PointF b2)
	Checks whether passed in point falls between the bounds of both lines to ensure that an intersection occurred inside the segments.
bool	LineCanIntersectCircle (PointF p1, PointF p2, PointF c, float r)
	Return whether a line segment intersect a circle in TWO PLACES.
List< PointF >	LineIntersectsCircle (PointF p1, PointF p2, PointF c, float r)
void	AddCollisionObject (Collider obj)
void	RemoveCollisionObject (Collider obj)
HashSet< Collider >	GetColliderObjects ()
bool	PointIsCollidingWithLayer (PointF point, string layer)
List< Collider >	GetCollidersOfLayer (string layer)
Raycast2DResult	Raycast2D (PointF origin, Vector2 direction, float distance, List< string > layers)
	Casts a ray from a point in given direction for given distance. Will stop at the first collider hit.

Member Function Documentation

AABBOverlap()

bool GREngine.Core.Physics2D.CollisionSystem.AABBOverlap ( AABB  a, AABB  b  )

inline

Tests whether two AABB's overlap.

Parameters

a
b

Returns

Implements GREngine.Core.Physics2D.ICollisionSystem.

AddCollisionObject()

void GREngine.Core.Physics2D.CollisionSystem.AddCollisionObject ( Collider  obj )

inline

Implements GREngine.Core.Physics2D.ICollisionSystem.

GetAABBOverlapRegion()

AABB GREngine.Core.Physics2D.CollisionSystem.GetAABBOverlapRegion ( AABB  a, AABB  b  )

inline

Creates a new AABB that represents where 2 given AABB's overlap (AABB Intersection)

Parameters

a
b

Returns

Implements GREngine.Core.Physics2D.ICollisionSystem.

GetColliderObjects()

HashSet< Collider > GREngine.Core.Physics2D.CollisionSystem.GetColliderObjects ( )

inline

Implements GREngine.Core.Physics2D.ICollisionSystem.

GetCollidersOfLayer()

List< Collider > GREngine.Core.Physics2D.CollisionSystem.GetCollidersOfLayer ( string  layer )

inline

Implements GREngine.Core.Physics2D.ICollisionSystem.

GetCombinedAABBRegion()

AABB GREngine.Core.Physics2D.CollisionSystem.GetCombinedAABBRegion ( AABB  a, AABB  b  )

inline

Creates a new AABB that represents the AABB that the two given AABB's cover (AABB Union)

Parameters

a
b

Implements GREngine.Core.Physics2D.ICollisionSystem.

IntersectionIsWithinLineSegments()

bool GREngine.Core.Physics2D.CollisionSystem.IntersectionIsWithinLineSegments ( PointF  intersection, PointF  a1, PointF  a2, PointF  b1, PointF  b2  )

inline

Checks whether passed in point falls between the bounds of both lines to ensure that an intersection occurred inside the segments.

///

Parameters

intersection
a1	Origin of line 1
a2	end of line 1
b1	Origin of line 2
b2	end of line 2

Returns

Implements GREngine.Core.Physics2D.ICollisionSystem.

LineCanIntersectCircle()

bool GREngine.Core.Physics2D.CollisionSystem.LineCanIntersectCircle ( PointF  p1, PointF  p2, PointF  c, float  r  )

inline

Return whether a line segment intersect a circle in TWO PLACES.

Parameters

p1
p2
c
r

Returns

LineIntersectionPoint()

PointF GREngine.Core.Physics2D.CollisionSystem.LineIntersectionPoint ( Line  l1, Line  l2  )

inline

Will take two lines that will intersect, and finds their intersection point.

Parameters

l1	Primary Line
l2	Other colliders line

Returns

Implements GREngine.Core.Physics2D.ICollisionSystem.

LineIntersectsCircle()

List< PointF > GREngine.Core.Physics2D.CollisionSystem.LineIntersectsCircle ( PointF  p1, PointF  p2, PointF  c, float  r  )

inline

Implements GREngine.Core.Physics2D.ICollisionSystem.

LinesCanIntersect()

bool GREngine.Core.Physics2D.CollisionSystem.LinesCanIntersect ( Line  l1, Line  l2  )

inline

This simply checks if two Lines can intersect since their gradients are not the same.

Parameters

l1	Primary Line
l2	Other colliders line

Returns

Implements GREngine.Core.Physics2D.ICollisionSystem.

LinesSegmentsOverlap()

bool GREngine.Core.Physics2D.CollisionSystem.LinesSegmentsOverlap ( PointF  a1, PointF  a2, PointF  b1, PointF  b2  )

inline

Checks whether the AABB's of two line segments overlap (hence potential intersection)

Parameters

a1	Origin of line 1
a2	end of line 1
b1	Origin of line 2
b2	end of line 2

Returns

Implements GREngine.Core.Physics2D.ICollisionSystem.

PointIsCollidingWithLayer()

bool GREngine.Core.Physics2D.CollisionSystem.PointIsCollidingWithLayer ( PointF  point, string  layer  )

inline

Implements GREngine.Core.Physics2D.ICollisionSystem.

PointIsInAABB()

bool GREngine.Core.Physics2D.CollisionSystem.PointIsInAABB ( PointF  p, AABB  aabb  )

inline

Implements GREngine.Core.Physics2D.ICollisionSystem.

Raycast2D()

Raycast2DResult GREngine.Core.Physics2D.CollisionSystem.Raycast2D ( PointF  origin, Vector2  direction, float  distance, List< string >  layers  )

inline

Casts a ray from a point in given direction for given distance. Will stop at the first collider hit.

Parameters

origin	Point the raycast starts
direction	direction in which it is cast
distance	max distance the ray will extend
layers	the layers the ray is allowed to collide with

Returns

A Raycast2DResult that stores the collider hit reference, hit point, and collision normal

Implements GREngine.Core.Physics2D.ICollisionSystem.

RemoveCollisionObject()

void GREngine.Core.Physics2D.CollisionSystem.RemoveCollisionObject ( Collider  obj )

inline

Implements GREngine.Core.Physics2D.ICollisionSystem.

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The documentation for this class was generated from the following file:

• GREngine.Core/GREngine.Core.Physics2D/CollisionSystem.cs