BoundingRectangle.cs

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namespace Engine {
    public struct BoundingRectangle : IEquatable<BoundingRectangle> {
        public Vector2 Min;
 
        public Vector2 Max;
 
        public IEnumerable<Vector2> Corners {
            get {
                yield return new Vector2(Min.X, Min.Y);
                yield return new Vector2(Max.X, Min.Y);
                yield return new Vector2(Min.X, Max.Y);
                yield return new Vector2(Max.X, Max.Y);
            }
        }
 
        public BoundingRectangle(float x1, float y1, float x2, float y2) {
            Min = new Vector2(x1, y1);
            Max = new Vector2(x2, y2);
        }
 
        public BoundingRectangle(Vector2 min, Vector2 max) {
            Min = min;
            Max = max;
        }
 
        public BoundingRectangle(IEnumerable<Vector2> points) {
            ArgumentNullException.ThrowIfNull(points);
            Min = new Vector2(float.PositiveInfinity);
            Max = new Vector2(float.NegativeInfinity);
            foreach (Vector2 point in points) {
                Min.X = MathUtils.Min(Min.X, point.X);
                Min.Y = MathUtils.Min(Min.Y, point.Y);
                Max.X = MathUtils.Max(Max.X, point.X);
                Max.Y = MathUtils.Max(Max.Y, point.Y);
            }
            if (Min.X == float.PositiveInfinity) {
                throw new ArgumentException("points");
            }
        }
 
        public static implicit operator BoundingRectangle((float X1, float Y1, float X2, float Y2) v) => new(v.X1, v.Y1, v.X2, v.Y2);
 
        public override bool Equals(object obj) => obj is BoundingRectangle rectangle && Equals(rectangle);
 
        public override int GetHashCode() => Min.GetHashCode() + Max.GetHashCode();
 
        public override string ToString() => $"{Min},{Max}";
 
        public bool Equals(BoundingRectangle other) => Min == other.Min && Max == other.Max;
 
        public Vector2 Center() => new(0.5f * (Min.X + Max.X), 0.5f * (Min.Y + Max.Y));
 
        public Vector2 Size() => Max - Min;
 
        public float Area() {
            Vector2 vector = Size();
            return vector.X * vector.Y;
        }
 
        public bool Contains(Vector2 p) => p.X >= Min.X && p.X <= Max.X && p.Y >= Min.Y && p.Y <= Max.Y;
 
        public bool Intersection(BoundingRectangle r) => r.Max.X >= Min.X && r.Min.X <= Max.X && r.Max.Y >= Min.Y && r.Min.Y <= Max.Y;
 
        public bool Intersection(BoundingCircle circle) {
            float num = circle.Center.X - Math.Clamp(circle.Center.X, Min.X, Max.X);
            float num2 = circle.Center.Y - Math.Clamp(circle.Center.Y, Min.Y, Max.Y);
            return num * num + num2 * num2 <= circle.Radius * circle.Radius;
        }
 
        public static BoundingRectangle Intersection(BoundingRectangle r1, BoundingRectangle r2) {
            Vector2 min = Vector2.Max(r1.Min, r2.Min);
            Vector2 max = Vector2.Min(r1.Max, r2.Max);
            return !(max.X > min.X) || !(max.Y > min.Y) ? default : new BoundingRectangle(min, max);
        }
 
        public static BoundingRectangle Union(BoundingRectangle r1, BoundingRectangle r2) {
            Vector2 min = Vector2.Min(r1.Min, r2.Min);
            Vector2 max = Vector2.Max(r1.Max, r2.Max);
            return new BoundingRectangle(min, max);
        }
 
        public static BoundingRectangle Union(BoundingRectangle r, Vector2 p) {
            Vector2 min = Vector2.Min(r.Min, p);
            Vector2 max = Vector2.Max(r.Max, p);
            return new BoundingRectangle(min, max);
        }
 
        public static float Distance(BoundingRectangle r, Vector2 p) {
            float num = MathUtils.Max(r.Min.X - p.X, 0f, p.X - r.Max.X);
            float num2 = MathUtils.Max(r.Min.Y - p.Y, 0f, p.Y - r.Max.Y);
            return MathF.Sqrt(num * num + num2 * num2);
        }
 
        public static bool operator ==(BoundingRectangle a, BoundingRectangle b) => a.Equals(b);
 
        public static bool operator !=(BoundingRectangle a, BoundingRectangle b) => !a.Equals(b);
    }
}