/// <summary> Check if this space Touches a box
///
/// </summary>
/// <param name="box">The box to check against
/// </param>
/// <param name="xp">The x position of the box to check
/// </param>
/// <param name="yp">The y position of the box to check
/// </param>
/// <returns> True if the box Touches these space
/// </returns>
public virtual bool Touches(AABox box, float xp, float yp)
{
float thisWidth = (this.x2 - this.x1) / 2;
float thisHeight = (this.y2 - this.y1) / 2;
float thisCx = this.x1 + thisWidth;
float thisCy = this.y1 + thisHeight;
float x1 = xp - (box.Width / 2);
float x2 = xp + (box.Width / 2);
float y1 = yp - (box.Height / 2);
float y2 = yp + (box.Height / 2);
float otherWidth = (x2 - x1) / 2;
float otherHeight = (y2 - y1) / 2;
float otherCx = xp;
float otherCy = yp;
float dx = System.Math.Abs(thisCx - otherCx);
float dy = System.Math.Abs(thisCy - otherCy);
float totalWidth = thisWidth + otherWidth;
float totalHeight = thisHeight + otherHeight;
return (totalWidth > dx) && (totalHeight > dy);
}
/// <summary> Combine this space with another box
///
/// </summary>
/// <param name="box">The box to include in this space
/// </param>
/// <param name="xp">The x position of the box
/// </param>
/// <param name="yp">The y position of the box
/// </param>
public virtual void AddAABox(AABox box, float xp, float yp)
{
float x1 = xp - box.Width;
float x2 = xp + box.Width;
float y1 = yp - box.Height;
float y2 = yp + box.Height;
this.x1 = System.Math.Min(x1, this.x1);
this.y1 = System.Math.Min(y1, this.y1);
this.x2 = System.Math.Max(x2, this.x2);
this.y2 = System.Math.Max(y2, this.y2);
}