00001 #include "AABB.h"
00002
00003 bool AABBi::AABBvsCircleCollisionTest(const AABBi &box, const Vector2i &circlePos, const int &circleRadius, Vector2i &closestPoint)
00004 {
00005 closestPoint = circlePos;
00006 if(circlePos.x < box.Left)
00007 closestPoint.x = box.Left;
00008 else if(circlePos.x > box.Right)
00009 closestPoint.x = box.Right;
00010
00011 if(circlePos.y < box.Bottom)
00012 closestPoint.y = box.Bottom;
00013 else if(closestPoint.y > box.Top)
00014 closestPoint.y = box.Top;
00015
00016 Vector2i diffVec = closestPoint - circlePos;
00017 if(diffVec.getLengthSqrd() > circleRadius * circleRadius)
00018 return false;
00019 else
00020 return true;
00021 }
00022
00023 bool AABBi::AABBvsAABBCollisionTest(const AABBi &boxA, const AABBi &boxB)
00024 {
00025 if(boxA.Top < boxB.Bottom)
00026 return false;
00027 if(boxA.Bottom > boxB.Top)
00028 return false;
00029 if(boxA.Left > boxB.Right)
00030 return false;
00031 if(boxA.Right < boxB.Left)
00032 return false;
00033
00034 return true;
00035 }
00036
00037 eAABBSideQueryResult AABBi::GetSideFromClosestPoint(const AABBi &box, const Vector2i &point, Vector2i* pSidePointA, Vector2i* pSidePointB)
00038 {
00039 eAABBSideQueryResult qResult = eInsideAABB;
00040
00041 if(box.Left == point.x)
00042 {
00043 if(pSidePointA)
00044 *pSidePointA = Vector2i(box.Left, box.Top);
00045 if(pSidePointB)
00046 *pSidePointB = Vector2i(box.Left, box.Bottom);
00047 qResult = eLeftSide;
00048 }
00049 else if(box.Right == point.x)
00050 {
00051 if(pSidePointA)
00052 *pSidePointA = Vector2i(box.Right, box.Top);
00053 if(pSidePointB)
00054 *pSidePointB = Vector2i(box.Right, box.Bottom);
00055 qResult = eRightSide;
00056 }
00057 else if(box.Top == point.y)
00058 {
00059 if(pSidePointA)
00060 *pSidePointA = Vector2i(box.Left, box.Top);
00061 if(pSidePointB)
00062 *pSidePointB = Vector2i(box.Right, box.Top);
00063 qResult = eTopSide;
00064 }
00065 else if(box.Bottom == point.y)
00066 {
00067 if(pSidePointA)
00068 *pSidePointA = Vector2i(box.Left, box.Bottom);
00069 if(pSidePointB)
00070 *pSidePointB = Vector2i(box.Right, box.Bottom);
00071 qResult = eBottomSide;
00072 }
00073
00074 return qResult;
00075 }
