Lights, colored items (only used for wires atm)

Subsurface/Items/Components/Signal/LightComponent.cs

@@ -1,13 +1,33 @@
-using Microsoft.Xna.Framework;
+using FarseerPhysics;
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+using Subsurface.Lights;
+using System;
 using System.Xml.Linq;
 
 namespace Subsurface.Items.Components
 {
-    class LightComponent : ItemComponent
+    class LightComponent : Powered
     {
         private Color lightColor;
 
-        private Sprite sprite;
+        //private Sprite sprite;
+
+        LightSource light;
+
+        float range;
+
+        float lightBrightness;
+
+        [HasDefaultValue(100.0f, true)]
+        public float Range
+        {
+            get { return range; }
+            set
+            {
+                range = MathHelper.Clamp(value, 0.0f, 2048.0f);
+            }
+        }
 
         [InGameEditable, HasDefaultValue("1.0,1.0,1.0,1.0", true)]
         public string LightColor
@@ -19,27 +39,74 @@ namespace Subsurface.Items.Components
             }
         }
 
+        public override void Move(Vector2 amount)
+        {
+            light.Position += amount;
+        }
+
         public LightComponent(Item item, XElement element)
             : base (item, element)
         {
-            foreach (XElement subElement in element.Elements())
-            {
-                if (subElement.Name.ToString().ToLower() != "sprite") continue;
-                sprite = new Sprite(subElement);
-                break;
-            }
+            //foreach (XElement subElement in element.Elements())
+            //{
+            //    if (subElement.Name.ToString().ToLower() != "sprite") continue;
+            //    sprite = new Sprite(subElement);
+            //    break;
+            //}
+
+            light = new LightSource(item.Position, 100.0f, Color.White);
+
+            isActive = true;
 
             //lightColor = new Color(ToolBox.GetAttributeVector4(element, "color", Vector4.One));
         }
-        
-        public override void Draw(Microsoft.Xna.Framework.Graphics.SpriteBatch spriteBatch)
+
+        public override void Update(float deltaTime, Camera cam)
         {
-            if (!isActive || sprite==null) return;
-            sprite.Draw(spriteBatch, new Vector2(item.Position.X, -item.Position.Y), 0.0f, 1.0f, Microsoft.Xna.Framework.Graphics.SpriteEffects.None);
+            base.Update(deltaTime, cam);
+
+            if (item.body != null)
+            {
+                light.Position = ConvertUnits.ToDisplayUnits(item.body.Position);
+            }
+
+            if (powerConsumption == 0.0f)
+            {
+                voltage = 1.0f;
+            }
+            else
+            {
+                currPowerConsumption = powerConsumption;                
+            }
+
+            if (voltage < Rand.Range(0.0f, minVoltage))
+            {
+                lightBrightness = 0.0f;
+            }
+            else
+            {
+                lightBrightness = MathHelper.Lerp(lightBrightness, Math.Min(voltage, 1.0f), 0.1f);
+            }
+
+            light.Color = lightColor * lightBrightness;
+
+            light.Range = range * (float)Math.Sqrt(lightBrightness);
+
+            voltage = 0.0f;
+        }
+
+        public override void Draw(SpriteBatch spriteBatch, bool editing)
+        {
+            if (!isActive)
+            {
+                light.Color = Color.Transparent;
+            }   
         }
 
         public override void ReceiveSignal(string signal, Connection connection, Item sender, float power=0.0f)
         {
+            base.ReceiveSignal(signal, connection, sender, power);
+
             switch (connection.Name)
             {
                 case "toggle":