LuaCsForBarotraumaEP/Barotrauma/BarotraumaShared/SharedSource/Items/Components/Signal/LightComponent.cs

using Microsoft.Xna.Framework;
using System;
using System.Xml.Linq;
using Barotrauma.Networking;
#if CLIENT
using Microsoft.Xna.Framework.Graphics;
using Barotrauma.Lights;
#endif

namespace Barotrauma.Items.Components
{
    partial class LightComponent : Powered, IServerSerializable, IDrawableComponent
    {
        private Color lightColor;
        private float lightBrightness;
        private float blinkFrequency;
        private float range;
        private float flicker, flickerState;
        private bool castShadows;
        private bool drawBehindSubs;

        private float blinkTimer;

        private double lastToggleSignalTime;

        public PhysicsBody ParentBody;

        [Serialize(100.0f, true, description: "The range of the emitted light. Higher values are more performance-intensive."),
            Editable(MinValueFloat = 0.0f, MaxValueFloat = 2048.0f)]
        public float Range
        {
            get { return range; }
            set
            {
                range = MathHelper.Clamp(value, 0.0f, 4096.0f);
#if CLIENT
                item.ResetCachedVisibleSize();
                if (light != null) { light.Range = range; }
#endif
            }
        }

        public float Rotation;

        [Editable, Serialize(true, true, description: "Should structures cast shadows when light from this light source hits them. " +
            "Disabling shadows increases the performance of the game, and is recommended for lights with a short range.")]
        public bool CastShadows
        {
            get { return castShadows; }
            set
            {
                castShadows = value;
#if CLIENT
                if (light != null) light.CastShadows = value;
#endif
            }
        }

        [Editable, Serialize(false, true, description: "Lights drawn behind submarines don't cast any shadows and are much faster to draw than shadow-casting lights. " +
            "It's recommended to enable this on decorative lights outside the submarine's hull.")]
        public bool DrawBehindSubs
        {
            get { return drawBehindSubs; }
            set
            {
                drawBehindSubs = value;
#if CLIENT
                if (light != null) light.IsBackground = drawBehindSubs;
#endif
            }
        }

        [Editable, Serialize(false, true, description: "Is the light currently on.")]
        public bool IsOn
        {
            get { return IsActive; }
            set
            {
                if (IsActive == value) { return; }

                IsActive = value;
                OnStateChanged();
            }
        }

        [Editable, Serialize(0.0f, false, description: "How heavily the light flickers. 0 = no flickering, 1 = the light will alternate between completely dark and full brightness.")]
        public float Flicker
        {
            get { return flicker; }
            set
            {
                flicker = MathHelper.Clamp(value, 0.0f, 1.0f);
            }
        }

        [Editable, Serialize(1.0f, false, description: "How fast the light flickers.")]
        public float FlickerSpeed
        {
            get;
            set;
        }

        [Editable, Serialize(0.0f, true, description: "How rapidly the light blinks on and off (in Hz). 0 = no blinking.")]
        public float BlinkFrequency
        {
            get { return blinkFrequency; }
            set
            {
                blinkFrequency = MathHelper.Clamp(value, 0.0f, 60.0f);
            }
        }

        [InGameEditable, Serialize("255,255,255,255", true, description: "The color of the emitted light (R,G,B,A).")]
        public Color LightColor
        {
            get { return lightColor; }
            set
            {
                lightColor = value;
#if CLIENT
                if (light != null) light.Color = IsActive ? lightColor : Color.Transparent;
#endif
            }
        }

        [Serialize(false, false, description: "If enabled, the component will ignore continuous signals received in the toggle input (i.e. a continuous signal will only toggle it once).")]
        public bool IgnoreContinuousToggle
        {
            get;
            set;
        }

        public override void Move(Vector2 amount)
        {
#if CLIENT
            light.Position += amount;
#endif
        }

        public override bool IsActive
        {
            get
            {
                return base.IsActive;
            }

            set
            {
                if (base.IsActive == value) { return; }
                base.IsActive = value;

                SetLightSourceState(value, value ? lightBrightness : 0.0f);
            }
        }

        public LightComponent(Item item, XElement element)
            : base(item, element)
        {
#if CLIENT
            light = new LightSource(element)
            {
                ParentSub = item.CurrentHull?.Submarine,
                Position = item.Position,
                CastShadows = castShadows,
                IsBackground = drawBehindSubs,
                SpriteScale = Vector2.One * item.Scale,
                Range = range
            };
#endif

            IsActive = IsOn;
            item.AddTag("light");
        }
        
        public override void Update(float deltaTime, Camera cam)
        {
            if (item.AiTarget != null)
            {
                UpdateAITarget(item.AiTarget);
            }
            UpdateOnActiveEffects(deltaTime);

#if CLIENT
            light.ParentSub = item.Submarine;
#endif
            if (item.Container != null)
            {
                SetLightSourceState(false, 0.0f);
                return;
            }
#if CLIENT
            light.Position = ParentBody != null ? ParentBody.Position : item.Position;
#endif

            PhysicsBody body = ParentBody ?? item.body;
            if (body != null)
            {
#if CLIENT
                light.Rotation = body.Dir > 0.0f ? body.DrawRotation : body.DrawRotation - MathHelper.Pi;
                light.LightSpriteEffect = (body.Dir > 0.0f) ? SpriteEffects.None : SpriteEffects.FlipVertically;
#endif
                if (!body.Enabled)
                {
                    SetLightSourceState(false, 0.0f);
                    return;
                }
            }
            else
            {
#if CLIENT
                light.Rotation = -Rotation;
#endif
            }

            currPowerConsumption = powerConsumption;
            if (Rand.Range(0.0f, 1.0f) < 0.05f && Voltage < Rand.Range(0.0f, MinVoltage))
            {
#if CLIENT
                if (Voltage > 0.1f)
                {
                    SoundPlayer.PlaySound("zap", item.WorldPosition, hullGuess: item.CurrentHull);
                }
#endif
                lightBrightness = 0.0f;
            }
            else
            {
                lightBrightness = MathHelper.Lerp(lightBrightness, powerConsumption <= 0.0f ? 1.0f : Math.Min(Voltage, 1.0f), 0.1f);
            }

            if (blinkFrequency > 0.0f)
            {
                blinkTimer = (blinkTimer + deltaTime * blinkFrequency) % 1.0f;
            }

            if (blinkTimer > 0.5f)
            {
                SetLightSourceState(false, lightBrightness);
            }
            else
            {
                flickerState += deltaTime * FlickerSpeed;
                flickerState %= 255;
                float noise = PerlinNoise.GetPerlin(flickerState, flickerState * 0.5f) * flicker;
                SetLightSourceState(true, lightBrightness * (1.0f - noise));
            }

            if (powerIn == null && powerConsumption > 0.0f) { Voltage -= deltaTime; }
        }

        public override void UpdateBroken(float deltaTime, Camera cam)
        {
            SetLightSourceState(false, 0.0f);
        }

        public override bool Use(float deltaTime, Character character = null)
        {
            return true;
        }

        partial void OnStateChanged();

        public override void ReceiveSignal(int stepsTaken, string signal, Connection connection, Item source, Character sender, float power = 0.0f, float signalStrength = 1.0f)
        {
            switch (connection.Name)
            {
                case "toggle":
                    if (!IgnoreContinuousToggle || lastToggleSignalTime < Timing.TotalTime - 0.1)
                    {
                        IsOn = !IsOn;
                    }
                    lastToggleSignalTime = Timing.TotalTime;
                    break;
                case "set_state":
                    IsOn = signal != "0";
                    break;
                case "set_color":
                    LightColor = XMLExtensions.ParseColor(signal, false);
                    break;
            }
        }

        private void UpdateAITarget(AITarget target)
        {
            if (!IsActive) { return; }
            if (target.MaxSightRange <= 0)
            {
                target.MaxSightRange = Range * 5;
            }
            target.SightRange = Math.Max(target.SightRange, target.MaxSightRange * lightBrightness);
        }

        partial void SetLightSourceState(bool enabled, float brightness);
    }
}