From c1cbde42881c0128b9a693524e462e8c2183556f Mon Sep 17 00:00:00 2001
From: Roni Kovaniemi <roni.kovaniemi@gmail.com>
Date: Mon, 9 Jul 2018 14:42:07 +0300
Subject: [PATCH] Adder Signal Component

Added a Adder signal component, which adds values inputted together and outputs a sum.
---
 .../BarotraumaShared.projitems                |  1 +
 .../Content/Items/Electricity/signalitems.xml | 34 ++++++++++
 .../Items/Components/Signal/AdderComponent.cs | 64 +++++++++++++++++++
 3 files changed, 99 insertions(+)
 create mode 100644 Barotrauma/BarotraumaShared/Source/Items/Components/Signal/AdderComponent.cs
diff --git a/Barotrauma/BarotraumaShared/BarotraumaShared.projitems b/Barotrauma/BarotraumaShared/BarotraumaShared.projitems
index a0464c1ec..10c86e8ad 100644
--- a/Barotrauma/BarotraumaShared/BarotraumaShared.projitems
+++ b/Barotrauma/BarotraumaShared/BarotraumaShared.projitems
@@ -1475,6 +1475,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)Source\Characters\CharacterNetworking.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Source\Characters\DamageModifier.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Source\Events\Missions\MissionPrefab.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Source\Items\Components\Signal\AdderComponent.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Source\StatusEffects\DelayedEffect.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Source\Characters\HuskInfection.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Source\Characters\Jobs\Job.cs" />
diff --git a/Barotrauma/BarotraumaShared/Content/Items/Electricity/signalitems.xml b/Barotrauma/BarotraumaShared/Content/Items/Electricity/signalitems.xml
index b02f10d62..16075682d 100644
--- a/Barotrauma/BarotraumaShared/Content/Items/Electricity/signalitems.xml
+++ b/Barotrauma/BarotraumaShared/Content/Items/Electricity/signalitems.xml
@@ -146,6 +146,40 @@
     </ConnectionPanel>
   </Item>
 
+  <Item
+    name="Adder Component"
+    category="Electrical"
+    Tags="smallitem"
+    linkable="false"
+    cargocontainername="Metal Crate"
+    price="10"
+    description="Sends a signal when both inputs receive a signal within a set period of each other.">
+
+    <Deconstruct time="10">
+      <Item name="Steel Bar"/>
+      <Item name="FPGA Circuit"/>
+    </Deconstruct>
+
+    <Sprite texture="signalcomp.png" depth="0.8" sourcerect="0,0,16,16"/>
+
+    <AdderComponent canbeselected = "true"/>
+
+    <Body width="16" height="16" density="30"/>
+
+    <Holdable selectkey="Select" pickkey="Use" slots="Any,RightHand,LeftHand" msg="Detach [Wrench]" PickingTime="5.0"
+              aimpos="65,-10" handle1="0,0" attachable="true" aimable="true">
+      <requireditem name="Wrench" type="Equipped"/>
+    </Holdable>
+
+
+    <ConnectionPanel selectkey="Action" canbeselected = "true" msg="Rewire [Screwdriver]">
+      <requireditem name="Screwdriver,Wire" type="Equipped"/>
+      <input name="signal_in1"/>
+      <input name="signal_in2"/>
+      <output name="signal_out"/>
+    </ConnectionPanel>
+  </Item>
+  
   <Item
     name="Or Component"
     category="Electrical"
diff --git a/Barotrauma/BarotraumaShared/Source/Items/Components/Signal/AdderComponent.cs b/Barotrauma/BarotraumaShared/Source/Items/Components/Signal/AdderComponent.cs
new file mode 100644
index 000000000..457a91f35
--- /dev/null
+++ b/Barotrauma/BarotraumaShared/Source/Items/Components/Signal/AdderComponent.cs
@@ -0,0 +1,64 @@
+﻿using System;
+using System.Xml.Linq;
+
+namespace Barotrauma.Items.Components
+{
+    class AdderComponent : ItemComponent
+    {
+        //an array to keep track of how long ago a signal was received on both inputs
+        protected float[] timeSinceReceived;
+
+        protected float[] receivedSignal;
+
+
+        //the output is sent if both inputs have received a signal within the timeframe
+        protected float timeFrame;
+        
+        [InGameEditable, Serialize(0.0f, true)]
+        public float TimeFrame
+        {
+            get { return timeFrame; }
+            set
+            {
+                timeFrame = Math.Max(0.0f, value);
+            }
+        }
+
+        public AdderComponent(Item item, XElement element)
+            : base(item, element)
+        {
+            timeSinceReceived = new float[] { Math.Max(timeFrame * 2.0f, 0.1f), Math.Max(timeFrame * 2.0f, 0.1f) };
+            receivedSignal = new float[2];
+            IsActive = true;
+        }
+
+        public override void Update(float deltaTime, Camera cam)
+        {
+            bool sendOutput = true;
+            for (int i = 0; i < timeSinceReceived.Length; i++)
+            {
+                if (timeSinceReceived[i] > timeFrame) sendOutput = false;
+                timeSinceReceived[i] += deltaTime;
+            }
+            if (sendOutput)
+            {
+                item.SendSignal(0, (receivedSignal[0] + receivedSignal[1]).ToString(), "signal_out", null);
+            }
+        }
+
+        public override void ReceiveSignal(int stepsTaken, string signal, Connection connection, Item source, Character sender, float power=0.0f)
+        {
+            switch (connection.Name)
+            {
+                case "signal_in1":
+                    float.TryParse(signal, out receivedSignal[0]);
+                    timeSinceReceived[0] = 0.0f;
+                    break;
+                case "signal_in2":
+                    float.TryParse(signal, out receivedSignal[1]);
+                    timeSinceReceived[1] = 0.0f;
+                    break;
+            }
+        }
+    }
+}
