/*
* bool Inisde( x, y, l, r, b, t )//x,y are the point, l,r,b,t are the extents of the rectangle{ return x > l && x < r && y > b && y < t;}
* */
public bool Intersects(ExtendedRectangle rectangle)
{
return Check (this.CollisionRectangle, this.Origin,this.Rotation, rectangle.CollisionRectangle,rectangle.Origin,rectangle.Rotation);
}
private bool CheckAxisCollision(ExtendedRectangle rectA, ExtendedRectangle rectB, Vector2 aAxis)
{
int[] aRectangleAScalars = {
GenerateScalar(rectB.UpperLeft, aAxis),
GenerateScalar(rectB.UpperRight, aAxis),
GenerateScalar(rectB.LowerLeft, aAxis),
GenerateScalar(rectB.LowerRight, aAxis)
};
int[] aRectangleBScalars = {
GenerateScalar(rectA.UpperLeft, aAxis),
GenerateScalar(rectA.UpperRight, aAxis),
GenerateScalar(rectA.LowerLeft, aAxis),
GenerateScalar(rectA.LowerRight, aAxis)
};
int aRectangleAMinimum = Min(aRectangleAScalars);
int aRectangleAMaximum = Max(aRectangleAScalars);
int aRectangleBMinimum = Min(aRectangleBScalars);
int aRectangleBMaximum = Max(aRectangleBScalars);
//If we have overlaps between the Rectangles (i.e. Min of B is less than Max of A)
//then we are detecting a collision between the rectangles on this Axis
if ((aRectangleBMinimum <= aRectangleAMaximum
&& aRectangleBMaximum >= aRectangleAMaximum)
|| (aRectangleAMinimum <= aRectangleBMaximum
&& aRectangleAMaximum >= aRectangleBMaximum))
return true;
return false;
}
public bool Check(Rectangle theRectangleA, Vector2 theOriginA, float theRotationA, Rectangle theRectangleB, Vector2 theOriginB, float theRotationB)
{
ExtendedRectangle rectA = new ExtendedRectangle (theRectangleA, theRotationA, theOriginA);
ExtendedRectangle rectB = new ExtendedRectangle (theRectangleB, theRotationB, theOriginB);
theOriginA += rectA.UpperLeft;
theOriginB += rectB.UpperLeft;
rectB.Rotate (theOriginB, theRotationB);
rectB.RotateInverse (theOriginA, theRotationA);
rectA.AddVector (-theOriginA);
rectB.AddVector (-theOriginA);
if ((rectB.MinX () > rectA.MaxX ()) || (rectB.MaxX () < rectA.MinX ()) // x-axis of A
|| (rectB.MinY () > rectA.MaxY ()) || (rectB.MaxY () < rectA.MinY ()) // y-axis of A
|| (!CheckAxisCollision (rectA, rectB, rectB.UpperLeft - rectB.UpperRight)) // x-axis of B
|| (!CheckAxisCollision (rectA, rectB, rectB.UpperLeft - rectB.LowerLeft))) // y-axis of B
return false;
return true;
}
