namespace Prototype;

/// <summary>Cosmetic travelling streak; damage still uses the shot's authoritative trace.</summary>
public sealed class BulletTracer : Component
{
    public Vector3 Start { get; set; }
    public Vector3 End { get; set; }
    private float _age;
    protected override void OnUpdate()
    {
        _age += Time.Delta;
        var delta = End - Start;
        var head = System.MathF.Min( delta.Length, _age * 14000f );
        var tail = System.MathF.Max( 0, _age * 14000f - 160f );
        if ( tail >= delta.Length ) { DestroyGameObject(); return; }
        WorldPosition = Start + delta.Normal * ((head + tail) * .5f);
        WorldScale = new Vector3( System.MathF.Max( 1, head - tail ), .65f, .65f );
    }
}