using UnityEngine;

public static class Vector2Extensions
{
    public static Vector2 Rotate(this Vector2 vector, float angle)
    {
        float cosAngle = Mathf.Cos(angle);
        float sinAngle = Mathf.Sin(angle);

        float xNew = cosAngle * vector.x - sinAngle * vector.y;
        float yNew = sinAngle * vector.x + cosAngle * vector.y;

        return new Vector2(xNew, yNew);
    }
}

public static class Vector2IntExtensions
{
    public static Vector2Int Rotate60About(this Vector2Int vector, Vector2Int other)
    {
        var x = other.x + other.y - vector.y;
        var y = vector.x + vector.y - other.x;

        return new Vector2Int(x, y);
    }

    public static Vector2Int RotateNeg60About(this Vector2Int vector, Vector2Int other)
    {
        var x = vector.x + vector.y - other.x;
        var y = other.x + other.y - vector.y;

        return new Vector2Int(x, y);
    }

    public static Vector2Int Rotate120(this Vector2Int vector, int m, int n)
    {
        var x = m - vector.x - vector.y;
        var y = n + vector.x;

        return new Vector2Int(x, y);
    }

    public static Vector2Int RotateNeg120(this Vector2Int vector, int m, int n)
    {
        var x = vector.y - n;
        var y = m + n - vector.x - vector.y;

        return new Vector2Int(x, y);
    }

    public static Vector3 ToCartesianOrigin(this Vector2Int vector, Vector2Int origin, float isoGridSize)
    {
        Vector3 point = Vector3.zero;
        point.x = origin.x + 2 * vector.x * isoGridSize + vector.y * isoGridSize;
        point.y = origin.y + Mathf.Sqrt(3) * vector.y * isoGridSize;
        return point;
    }
}