OpenVIII-monogame/Core/Field/JSM/Instructions/SET.cs

using Microsoft.Xna.Framework;

namespace OpenVIII.Fields.Scripts.Instructions
{
    /// <summary>
    /// Place this entity's model at XCoord, YCoord standing on the given walkmesh triangle. Unlike SET3, this function will place the event on the walkable terrain (the ZCoord is interpolated from the walkmesh).
    /// </summary>
    /// <see cref="http://wiki.ffrtt.ru/index.php?title=FF8/Field/Script/Opcodes/01D_SET"/>
    public sealed class SET : JsmInstruction
    {
        #region Fields

        private readonly Vector2 _pos;
        private readonly int _walkmeshTriangleId;

        #endregion Fields

        #region Constructors

        public SET(int walkmeshTriangleId, int x, int y) => (_walkmeshTriangleId, _pos.X, _pos.Y) = (walkmeshTriangleId, x, y);

        public SET(int walkmeshTriangleId, IStack<IJsmExpression> stack)
            : this(walkmeshTriangleId,
                y: ((IConstExpression)stack.Pop()).Int32(),
                x: ((IConstExpression)stack.Pop()).Int32())
        {
        }

        #endregion Constructors

        #region Methods

        public override void Format(ScriptWriter sw, IScriptFormatterContext formatterContext, IServices services) => sw.Format(formatterContext, services)
                .Property(nameof(FieldObject.Model))
                .Method(nameof(FieldObjectModel.SetPosition))
                .Argument("walkmeshTriangleId", _walkmeshTriangleId)
                .Argument("x", (int)_pos.X)
                .Argument("y", (int)_pos.Y)
                .Comment(nameof(SET3));

        public override IAwaitable TestExecute(IServices services)
        {
            var currentObject = ServiceId.Field[services].Engine.CurrentObject;
            currentObject.Model.SetPosition(new WalkMeshCoords(_walkmeshTriangleId, _pos));
            return DummyAwaitable.Instance;
        }

        public override string ToString() => $"{nameof(SET)}({nameof(_walkmeshTriangleId)}: {_walkmeshTriangleId}, {nameof(_pos)}: {_pos})";

        #endregion Methods
    }
}