using System;
using System.Collections.Generic;
using UnityEngine;

namespace UnityEditor.VFX.Block
{
    //[VFXInfo(category = "Implicit")] //There's no way the user can meaningfully interact with them.
    class Age : VFXBlock
    {
        public override string name { get { return "Age"; } }
        public override VFXContextType compatibleContexts { get { return VFXContextType.Update; } }
        public override VFXDataType compatibleData { get { return VFXDataType.Particle; } }
        public override IEnumerable<VFXAttributeInfo> attributes
        {
            get
            {
                yield return new VFXAttributeInfo(VFXAttribute.Age, VFXAttributeMode.ReadWrite);
            }
        }

        public override IEnumerable<VFXNamedExpression> parameters
        {
            get
            {
                yield return new VFXNamedExpression(VFXBuiltInExpression.DeltaTime, "deltaTime");
            }
        }

        public override string source
        {
            get
            {
                return "age += deltaTime;";
            }
        }
    }
}