ModuleLimitedDataTransmitter: Implemented nearestRelay.
ModuleLimitedDataTransmitter: Implemented nearestRelay.

--- a/ARConfiguration.cs
+++ b/ARConfiguration.cs
@@ -8,8 +8,6 @@
 using ToadicusTools;
 using UnityEngine;
 
-[assembly: KSPAssemblyDependency("ToadicusTools", 0, 0)]
-
 namespace AntennaRange
 {
 	[KSPAddon(KSPAddon.Startup.SpaceCentre, false)]
@@ -19,6 +17,8 @@
 		private Rect configWindowPos;
 
 		private IButton toolbarButton;
+
+		private System.Version runningVersion;
 
 		private KSP.IO.PluginConfiguration _config;
 		private KSP.IO.PluginConfiguration config
@@ -46,8 +46,11 @@
 
 		public void OnGUI()
 		{
+			// Only runs once, if the Toolbar is available.
 			if (this.toolbarButton == null && ToolbarManager.ToolbarAvailable)
 			{
+				this.runningVersion = this.GetType().Assembly.GetName().Version;
+
 				Tools.PostDebugMessage(this, "Toolbar available; initializing button.");
 
 				this.toolbarButton = ToolbarManager.Instance.add("AntennaRange", "ARConfiguration");
@@ -64,6 +67,9 @@
 				AntennaRelay.requireLineOfSight = this.LoadConfigValue("requireLineOfSight", false);
 				ARFlightController.requireConnectionForControl =
 					this.LoadConfigValue("requireConnectionForControl", false);
+				ModuleLimitedDataTransmitter.fixedPowerCost = this.LoadConfigValue("fixedPowerCost", false);
+
+				Debug.Log(string.Format("{0} v{1} - ARonfiguration loaded!", this.GetType().Name, this.runningVersion));
 			}
 
 			if (this.showConfigWindow)
@@ -71,7 +77,7 @@
 				Rect configPos = GUILayout.Window(354163056,
 					this.configWindowPos,
 					this.ConfigWindow,
-					"AntennaRange Configuration",
+					string.Format("AntennaRange {0}.{1}", this.runningVersion.Major, this.runningVersion.Minor),
 					GUILayout.ExpandHeight(true),
 					GUILayout.ExpandWidth(true)
 				);
@@ -116,6 +122,17 @@
 
 			GUILayout.EndHorizontal();
 
+			GUILayout.BeginHorizontal();
+
+			bool fixedPowerCost = GUILayout.Toggle(ModuleLimitedDataTransmitter.fixedPowerCost, "Use fixed power cost");
+			if (fixedPowerCost != ModuleLimitedDataTransmitter.fixedPowerCost)
+			{
+				ModuleLimitedDataTransmitter.fixedPowerCost = fixedPowerCost;
+				this.SaveConfigValue("fixedPowerCost", fixedPowerCost);
+			}
+
+			GUILayout.EndHorizontal();
+
 			GUILayout.EndVertical();
 
 			GUI.DragWindow();

--- a/ARFlightController.cs
+++ b/ARFlightController.cs
@@ -28,6 +28,7 @@
 
 using KSP;
 using System;
+using System.Collections.Generic;
 using ToadicusTools;
 using UnityEngine;
 
@@ -40,31 +41,51 @@
 		public static bool requireConnectionForControl;
 		#endregion
 
+		#region Fields
+		protected Dictionary<ConnectionStatus, string> connectionTextures;
+
+		protected IButton toolbarButton;
+		#endregion
+
 		#region Properties
-		public ControlTypes currentControlLock
-		{
-			get
-			{
-				if (this.lockID == string.Empty)
-				{
-					return ControlTypes.None;
-				}
-
-				return InputLockManager.GetControlLock(this.lockID);
-			}
-		}
-
-		public string lockID
+		public ConnectionStatus currentConnectionStatus
 		{
 			get;
 			protected set;
 		}
 
+		protected string currentConnectionTexture
+		{
+			get
+			{
+				return this.connectionTextures[this.currentConnectionStatus];
+			}
+		}
+
+		public ControlTypes currentControlLock
+		{
+			get
+			{
+				if (this.lockID == string.Empty)
+				{
+					return ControlTypes.None;
+				}
+
+				return InputLockManager.GetControlLock(this.lockID);
+			}
+		}
+
+		public string lockID
+		{
+			get;
+			protected set;
+		}
+
 		public ControlTypes lockSet
 		{
 			get
 			{
-				return ControlTypes.GROUPS_ALL | ControlTypes.STAGING | ControlTypes.SAS | ControlTypes.RCS;
+				return ControlTypes.ALL_SHIP_CONTROLS;
 			}
 		}
 
@@ -86,39 +107,131 @@
 		protected void Awake()
 		{
 			this.lockID = "ARConnectionRequired";
+
+			if (ToolbarManager.ToolbarAvailable)
+			{
+				this.connectionTextures = new Dictionary<ConnectionStatus, string>();
+
+				this.connectionTextures[ConnectionStatus.None] = "AntennaRange/Textures/toolbarIconNoConnection";
+				this.connectionTextures[ConnectionStatus.Suboptimal] = "AntennaRange/Textures/toolbarIconSubOptimal";
+				this.connectionTextures[ConnectionStatus.Optimal] = "AntennaRange/Textures/toolbarIcon";
+
+				this.toolbarButton = ToolbarManager.Instance.add("AntennaRange", "ARConnectionStatus");
+
+				this.toolbarButton.TexturePath = this.connectionTextures[ConnectionStatus.None];
+				this.toolbarButton.Text = "AntennaRange";
+				this.toolbarButton.Visibility = new GameScenesVisibility(GameScenes.FLIGHT);
+				this.toolbarButton.Enabled = false;
+			}
+
+			GameEvents.onGameSceneLoadRequested.Add(this.onSceneChangeRequested);
+			GameEvents.onVesselChange.Add(this.onVesselChange);
 		}
 
 		protected void FixedUpdate()
 		{
+			// If we are requiring a connection for control, the vessel does not have any adequately staffed pods,
+			// and the vessel does not have any connected relays...
 			if (
+				HighLogic.LoadedSceneIsFlight &&
 				requireConnectionForControl &&
 				this.vessel != null &&
+				this.vessel.vesselType != VesselType.EVA &&
 				!this.vessel.hasCrewCommand() &&
-				this.vessel.IsControllable
-			)
-			{
-				if (this.vessel.HasConnectedRelay())
-				{
-					if (currentControlLock != ControlTypes.None)
+				!this.vessel.HasConnectedRelay())
+			{
+				// ...and if the controls are not currently locked...
+				if (currentControlLock == ControlTypes.None)
+				{
+					// ...lock the controls.
+					InputLockManager.SetControlLock(this.lockSet, this.lockID);
+				}
+			}
+			// ...otherwise, if the controls are locked...
+			else if (currentControlLock != ControlTypes.None)
+			{
+				// ...unlock the controls.
+				InputLockManager.RemoveControlLock(this.lockID);
+			}
+
+			if (this.toolbarButton != null && HighLogic.LoadedSceneIsFlight && FlightGlobals.ActiveVessel != null)
+			{
+				List<ModuleLimitedDataTransmitter> relays =
+					FlightGlobals.ActiveVessel.getModulesOfType<ModuleLimitedDataTransmitter>();
+
+				bool vesselCanTransmit = false;
+				bool vesselHasOptimalRelay = false;
+
+				foreach (ModuleLimitedDataTransmitter relay in relays)
+				{
+					if (!vesselCanTransmit && relay.CanTransmit())
 					{
-						InputLockManager.RemoveControlLock(this.lockID);
+						vesselCanTransmit = true;
 					}
+
+					if (!vesselHasOptimalRelay && relay.transmitDistance <= (double)relay.nominalRange)
+					{
+						vesselHasOptimalRelay = true;
+					}
+
+					if (vesselCanTransmit && vesselHasOptimalRelay)
+					{
+						break;
+					}
+				}
+
+				if (vesselHasOptimalRelay)
+				{
+					this.currentConnectionStatus = ConnectionStatus.Optimal;
+				}
+				else if (vesselCanTransmit)
+				{
+					this.currentConnectionStatus = ConnectionStatus.Suboptimal;
 				}
 				else
 				{
-					if (currentControlLock == ControlTypes.None)
-					{
-						InputLockManager.SetControlLock(this.lockSet, this.lockID);
-					}
-				}
+					this.currentConnectionStatus = ConnectionStatus.None;
+				}
+
+				this.toolbarButton.TexturePath = this.currentConnectionTexture;
 			}
 		}
 
 		protected void Destroy()
 		{
-
-		}
-		#endregion
+			InputLockManager.RemoveControlLock(this.lockID);
+
+			if (this.toolbarButton != null)
+			{
+				this.toolbarButton.Destroy();
+			}
+
+			GameEvents.onGameSceneLoadRequested.Remove(this.onSceneChangeRequested);
+			GameEvents.onVesselChange.Remove(this.onVesselChange);
+		}
+		#endregion
+
+		#region Event Handlers
+		protected void onSceneChangeRequested(GameScenes scene)
+		{
+			if (scene != GameScenes.FLIGHT)
+			{
+				MonoBehaviour.Destroy(this);
+			}
+		}
+
+		protected void onVesselChange(Vessel vessel)
+		{
+			InputLockManager.RemoveControlLock(this.lockID);
+		}
+		#endregion
+
+		public enum ConnectionStatus
+		{
+			None,
+			Suboptimal,
+			Optimal
+		}
 	}
 }
 

--- a/AntennaRelay.cs
+++ b/AntennaRelay.cs
@@ -38,7 +38,9 @@
 		public static bool requireLineOfSight;
 
 		// We don't have a Bard, so we'll hide Kerbin here.
-		protected CelestialBody Kerbin;
+		public static CelestialBody Kerbin;
+
+		protected CelestialBody _firstOccludingBody;
 
 		protected IAntennaRelay _nearestRelayCache;
 		protected IAntennaRelay moduleRef;
@@ -82,6 +84,18 @@
 		}
 
 		/// <summary>
+		/// Gets the first occluding body.
+		/// </summary>
+		/// <value>The first occluding body.</value>
+		public CelestialBody firstOccludingBody
+		{
+			get
+			{
+				return this._firstOccludingBody;
+			}
+		}
+
+		/// <summary>
 		/// Gets the transmit distance.
 		/// </summary>
 		/// <value>The transmit distance.</value>
@@ -95,7 +109,7 @@
 				if (this.nearestRelay == null)
 				{
 					// .. return the distance to Kerbin
-					return this.DistanceTo(this.Kerbin);
+					return this.DistanceTo(Kerbin);
 				}
 				else
 				{
@@ -134,7 +148,11 @@
 		{
 			if (
 				this.transmitDistance > this.maxTransmitDistance ||
-				(requireLineOfSight && this.nearestRelay == null && !this.vessel.hasLineOfSightTo(this.Kerbin))
+				(
+					requireLineOfSight &&
+					this.nearestRelay == null &&
+					!this.vessel.hasLineOfSightTo(Kerbin, out this._firstOccludingBody)
+				)
 			)
 			{
 				return false;
@@ -170,6 +188,8 @@
 				this,
 				this.vessel.id
 			));
+
+			this._firstOccludingBody = null;
 
 			// Set this vessel as checked, so that we don't check it again.
 			RelayDatabase.Instance.CheckedVesselsTable[vessel.id] = true;
@@ -211,7 +231,7 @@
 				}
 
 				// Skip vessels to which we do not have line of sight.
-				if (requireLineOfSight && !this.vessel.hasLineOfSightTo(potentialVessel))
+				if (requireLineOfSight && !this.vessel.hasLineOfSightTo(potentialVessel, out this._firstOccludingBody))
 				{
 					Tools.PostDebugMessage(
 						this,
@@ -278,11 +298,14 @@
 			this.moduleRef = module;
 
 			this.searchTimer = new System.Diagnostics.Stopwatch();
-			this.millisecondsBetweenSearches = 5000;
+			this.millisecondsBetweenSearches = 1250;
 
 			// HACK: This might not be safe in all circumstances, but since AntennaRelays are not built until Start,
 			// we hope it is safe enough.
-			this.Kerbin = FlightGlobals.Bodies.FirstOrDefault(b => b.name == "Kerbin");
+			if (AntennaRelay.Kerbin == null)
+			{
+				AntennaRelay.Kerbin = FlightGlobals.Bodies.FirstOrDefault(b => b.name == "Kerbin");
+			}
 		}
 
 		static AntennaRelay()

--- a/IAntennaRelay.cs
+++ b/IAntennaRelay.cs
@@ -42,6 +42,8 @@
 		/// <value>The parent Vessel.</value>
 		Vessel vessel { get; }
 
+		IAntennaRelay nearestRelay { get; }
+
 		/// <summary>
 		/// Gets the distance to the nearest relay or Kerbin, whichever is closer.
 		/// </summary>

--- a/ModuleLimitedDataTransmitter.cs
+++ b/ModuleLimitedDataTransmitter.cs
@@ -54,6 +54,10 @@
 	 * */
 	public class ModuleLimitedDataTransmitter : ModuleDataTransmitter, IScienceDataTransmitter, IAntennaRelay
 	{
+		// If true, use a fixed power cost at the configured value and degrade data rates instead of increasing power
+		// requirements.
+		public static bool fixedPowerCost;
+
 		// Stores the packetResourceCost as defined in the .cfg file.
 		protected float _basepacketResourceCost;
 
@@ -73,6 +77,9 @@
 		// and packetSize.
 		[KSPField(isPersistant = false)]
 		public float nominalRange;
+
+		[KSPField(isPersistant = false, guiActive = true, guiName = "Relay")]
+		public string UIrelayStatus;
 
 		[KSPField(isPersistant = false, guiActive = true, guiName = "Transmission Distance")]
 		public string UItransmitDistance;
@@ -116,6 +123,19 @@
 			get
 			{
 				return base.vessel;
+			}
+		}
+
+		public IAntennaRelay nearestRelay
+		{
+			get
+			{
+				if (this.relay == null)
+				{
+					return null;
+				}
+
+				return this.relay.nearestRelay;
 			}
 		}
 
@@ -291,7 +311,7 @@
 		// transmission fails (see CanTransmit).
 		protected void PreTransmit_SetPacketResourceCost()
 		{
-			if (this.transmitDistance <= this.nominalRange)
+			if (fixedPowerCost || this.transmitDistance <= this.nominalRange)
 			{
 				base.packetResourceCost = this._basepacketResourceCost;
 			}
@@ -300,13 +320,15 @@
 				base.packetResourceCost = this._basepacketResourceCost
 					* (float)Math.Pow (this.transmitDistance / this.nominalRange, 2);
 			}
+
+			base.packetResourceCost *= this.packetThrottle / 100f;
 		}
 
 		// Before transmission, set packetSize.  Per above, packet size increases with the inverse square of
 		// distance.  packetSize maxes out at _basepacketSize * maxDataFactor.
 		protected void PreTransmit_SetPacketSize()
 		{
-			if (this.transmitDistance >= this.nominalRange)
+			if (!fixedPowerCost && this.transmitDistance >= this.nominalRange)
 			{
 				base.packetSize = this._basepacketSize;
 			}
@@ -437,9 +459,27 @@
 		{
 			if (this.actionUIUpdate)
 			{
-				this.UItransmitDistance = Tools.MuMech_ToSI(this.transmitDistance) + "m";
-				this.UIpacketSize = this.CanTransmit() ? Tools.MuMech_ToSI(this.DataRate) + "MiT" : "N/A";
-				this.UIpacketCost = this.CanTransmit() ? Tools.MuMech_ToSI(this.DataResourceCost) + "E" : "N/A";
+				if (this.CanTransmit())
+				{
+					this.UIrelayStatus = string.Intern("Connected");
+					this.UItransmitDistance = Tools.MuMech_ToSI(this.transmitDistance) + "m";
+					this.UIpacketSize = Tools.MuMech_ToSI(this.DataRate) + "MiT";
+					this.UIpacketCost = Tools.MuMech_ToSI(this.DataResourceCost) + "E";
+				}
+				else
+				{
+					if (this.relay.firstOccludingBody == null)
+					{
+						this.UIrelayStatus = string.Intern("Out of range");
+					}
+					else
+					{
+						this.UIrelayStatus = string.Format("Blocked by {0}", this.relay.firstOccludingBody.bodyName);
+					}
+					this.UImaxTransmitDistance = "N/A";
+					this.UIpacketSize = "N/A";
+					this.UIpacketCost = "N/A";
+				}
 			}
 		}
 

--- a/Properties/AssemblyInfo.cs
+++ b/Properties/AssemblyInfo.cs
@@ -29,6 +29,8 @@
 using System.Reflection;
 using System.Runtime.CompilerServices;
 
+[assembly: KSPAssemblyDependency("ToadicusTools", 0, 0)]
+
 // Information about this assembly is defined by the following attributes.
 // Change them to the values specific to your project.
 [assembly: AssemblyTitle("AntennaRange")]
@@ -37,10 +39,9 @@
 // The assembly version has the format "{Major}.{Minor}.{Build}.{Revision}".
 // The form "{Major}.{Minor}.*" will automatically update the build and revision,
 // and "{Major}.{Minor}.{Build}.*" will update just the revision.
-[assembly: AssemblyVersion("1.1.*")]
+[assembly: AssemblyVersion("1.2.*")]
 // The following attributes are used to specify the signing key for the assembly,
 // if desired. See the Mono documentation for more information about signing.
 //[assembly: AssemblyDelaySign(false)]
 //[assembly: AssemblyKeyFile("")]
 
-