Smoll/Expansion2/ArrowComponent.cs

using System.Numerics;
using Raylib_cs;

namespace Smoll.Ex2 {
    class ArrowComponent : Smoll.Component {
        Complex offset;
        public Complex rawValue;
        Transform2DComponent? ownerTransform;

        public ArrowComponent(int offset_x = 0, int offset_y = 0)
        {
            this.offset = offset_x + Complex.ImaginaryOne*offset_y;
        }

        public override void OnAttached() {
            ownerTransform = owner.GetComponent<Transform2DComponent>();
        }

        public Complex Origin() {
            ownerTransform ??= owner.GetComponent<Transform2DComponent>();
            ownerTransform ??= new Transform2DComponent();
            var tr = ownerTransform.AbsoluteTransform();
            return tr.position + offset*Complex.Exp(Complex.ImaginaryOne * tr.angle) * tr.scale;
        }

        public Complex Vector() {
            ownerTransform ??= owner.GetComponent<Transform2DComponent>();
            ownerTransform ??= new Transform2DComponent();
            var tr = ownerTransform.AbsoluteTransform();
            return rawValue*Complex.Exp(Complex.ImaginaryOne * tr.angle) * tr.scale;
        }

        public Tuple<Complex, Complex> OriginAndVector() {
            ownerTransform ??= owner.GetComponent<Transform2DComponent>();
            ownerTransform ??= new Transform2DComponent();
            var tr = ownerTransform.AbsoluteTransform();
            return Tuple.Create(tr.position + offset*Complex.Exp(Complex.ImaginaryOne * tr.angle) * tr.scale, rawValue*Complex.Exp(Complex.ImaginaryOne * tr.angle) * tr.scale);
        }

        public override void Draw(Smoll.Layer.DrawMode drawMode) {
            if(drawMode == Layer.DrawMode.Debug) {
                var data = OriginAndVector();
                Complex start = data.Item1;
                Complex end = data.Item1 + data.Item2;
                Raylib.DrawLineEx(new Vector2((float)start.Real, (float)start.Imaginary),new Vector2((float)end.Real, (float)end.Imaginary),2f, Color.Red);
            }
        }
    }
}