/// <summary>
/// Detects collisions between this BoundingCircle and a BoundingRectangle
/// </summary>
/// <param name="c">This BoundingCircle</param>
/// <param name="r">The BoundingRectangle</param>
/// <returns>true if there is a collision, false otherwise</returns>
public static bool CollidesWith(this BoundingCircle c, BoundingRectangle r)
{
var closestX = Math.Max(Math.Min(c.X, r.X + r.Width), r.X);
var closestY = Math.Max(Math.Min(c.Y, r.Y + r.Height), r.Y);
return(Math.Pow(c.Radius, 2) >= Math.Pow(closestX - c.X, 2) + Math.Pow(closestY - c.Y, 2));
}
/// <summary>
/// Detects collisions between this BoundingRectangle and a BoundingCircle
/// </summary>
/// <param name="r">This BoundingRectangle</param>
/// <param name="c">The BoundingCircle</param>
/// <returns>true if there is a collision, false otherwise</returns>
public static bool CollidesWith(this BoundingRectangle r, BoundingCircle c)
{
return(c.CollidesWith(r));
}
// <summary>
/// Detects if this BoundingCircle collides with a Vector2
/// </summary>
/// <param name="c">This BoundingCircle</param>
/// <param name="v">The Vector2</param>
/// <returns>true if there is a collision, false otherwise</returns>
public static bool CollidesWith(this BoundingCircle c, Vector2 v)
{
return(v.CollidesWith(c));
}
/// <summary>
/// Detects collisions between this BoundingCircle and another BoundingCircle
/// </summary>
/// <param name="a">This BoundingCircle</param>
/// <param name="b">The other BoundingCircle</param>
/// <returns>true if there is a collision, false otherwise</returns>
public static bool CollidesWith(this BoundingCircle a, BoundingCircle b)
{
return(Math.Pow(a.Radius + b.Radius, 2) >= Math.Pow(a.X - b.X, 2) + Math.Pow(a.Y - b.Y, 2));
}
/// <summary>
/// Detects if this Vector2 collides with a BoundingCircle
/// </summary>
/// <param name="v">This Vector2</param>
/// <param name="c">The BoundingCircle</param>
/// <returns>true if there is a collision, false otherwise</returns>
public static bool CollidesWith(this Vector2 v, BoundingCircle c)
{
return(Math.Pow(c.Radius, 2) >= Math.Pow(v.X - c.X, 2) + Math.Pow(v.Y - c.Y, 2));
}