alien-attack/AlientAttack.MonoGame/Things/Muzzles/MuzzleMath.cs

using Microsoft.Xna.Framework;

namespace AlienAttack.MonoGame.Things.Muzzles;

public static class MuzzleMath
{
    public static Vector2 GetMuzzleWorld(Sprite owner, Vector2 muzzleLocalPx, float ownerScale = 1f)
    {
        // Assumes owner.Position is the top-left of the sprite
        return owner.Position + muzzleLocalPx * ownerScale;
    }

    public static Vector2 CenterBulletOn(Vector2 muzzleWorld, int bulletW, int bulletH)
    {
        return new Vector2(
            muzzleWorld.X - bulletW / 2f,
            muzzleWorld.Y - bulletH / 2f
        );
    }
}