public static bool CircleToRectangle(Circle a, Rectangle b)
{
//double cdX = Math.Abs(a.X - b.X - b.W/2);
//double cdY = Math.Abs(a.Y - b.Y - b.H/2);
//if (cdX > (b.W/2 + a.R))
//{
// return false;
//}
//if (cdY > (b.H/2 + a.R))
//{
// return false;
//}
//if (cdX <= (b.W/2))
//{
// return true;
//}
//if (cdY > (b.H/2))
//{
// return true;
//}
//double cornerDistance_sq = ((cdX - b.W/2)*(cdX - b.W/2)) +
// ((cdY - b.H/2)*(cdY - b.H/2));
//return (cornerDistance_sq <= (a.R*a.R));
double dmin = 0;
double[] C = new[] { a.cX, a.cY };
double[] Bmin = new[] { b.X, b.Y };
double[] Bmax = new[] { b.X + b.W, b.Y + b.H };
for (int i = 0; i < C.Length; i++)
{
if (C[i] < Bmin[i]) dmin += (C[i] - Bmin[i]) * (C[i] - Bmin[i]);
else if (C[i] > Bmax[i]) dmin += (C[i] - Bmax[i]) * (C[i] - Bmax[i]);
}
return dmin <= a.R * a.R;
}
/// <summary>
/// Creates a rectangle starting from 0, 0.
/// </summary>
/// <param name="rectangle">Rectangle Object</param>
public void CreateRectangle(Rectangle rectangle)
{
vectors.Clear();
vectors.Add(new Vector2(0, 0));
vectors.Add(new Vector2((float)rectangle.W, 0));
vectors.Add(new Vector2((float)rectangle.W, (float)rectangle.H));
vectors.Add(new Vector2(0, (float)rectangle.H));
vectors.Add(new Vector2(0, 0));
Position = new Vector2((float)rectangle.X, (float)rectangle.Y);
shape = rectangle;
}
public static bool RectangleToRectangle(Rectangle a, Rectangle b)
{
if (b == null) return false;
return !(a.X > b.X + b.W || a.X + a.W < b.X ||
a.Y > b.Y + b.H || a.Y + a.H < b.Y);
}