added helium resource, with the corresponding tank part (wip)

Parts/Balloon/balloon.cfg

@@ -11,11 +11,11 @@ PART
 	sound_parachute_open = activate
 	TechRequired = advLanding
 	entryCost = 3500
-	cost = 400
+	cost = 5000
 	category = Utility
 	subcategory = 0
 	title = Balloon
-	description = A test balloon.
+	description = A big balloon that can be inflated with helium (sold separately).
 	attachRules = 1,0,0,1,0
 	mass = 0.2
 	dragModelType = default
@@ -30,7 +30,5 @@ PART
 	MODULE
 	{
 		name = ModuleAerostat
-		DeployAnimation = semiDeployLarge
-		InflateAnimation = fullyDeployLarge
 	}
 }

Parts/HeliumTankRadial/heliumTankRadial.cfg

@@ -0,0 +1,31 @@
+PART
+{
+	name = heliumTankRadial
+	module = Part
+	author = Youen
+	mesh = model.mu
+	rescaleFactor = 1
+	node_attach = 0.0, 0.0, -0.1875, 0.0, 0.0, -1.0
+	TechRequired = advLanding
+	entryCost = 2000
+	cost = 2200
+	category = FuelTank
+	subcategory = 0
+	title = Helium tank
+	description = Disposable helium tank for all your lifting needs (and birthday party balloons). Do not refill after use.
+	attachRules = 0,1,0,0,1
+	mass = 0.003
+	dragModelType = default
+	maximum_drag = 0.2
+	minimum_drag = 0.2
+	angularDrag = 2
+	crashTolerance = 12
+	maxTemp = 2000 // = 2900
+	bulkheadProfiles = srf
+	RESOURCE
+	{
+		name = Helium
+		amount = 30
+		maxAmount = 30
+	}
+}

Plugin/ModuleAerostat.cs

@@ -8,12 +8,6 @@ namespace Aerostats
 {
     public class ModuleAerostat : PartModule
     {
-        [KSPField(isPersistant = false, guiActive = false)]
-        public string DeployAnimation = "semiDeploy";
-
-        [KSPField(isPersistant = false, guiActive = false)]
-        public string InflateAnimation = "fullyDeploy";
-
         // In this class, amount of gas Q is specified in m^3 at stp (standard pressure of 100kPa and temperature of 0°C = 273K). Ideal gas equation P.V = n.R.T gives us the equivalent number of moles: n = P.V/R/T = 100000.Q/8.314/273 = 44.Q mol
         private static readonly float R = 8.314f;
         private static readonly float ZeroCelsius = 273.15f;
@@ -39,16 +33,6 @@ namespace Aerostats
         [KSPField(isPersistant = false, guiActive = false)]
         public float MaxBalloonVolume = 10000;
 
-        /// <summary>
-        /// Maximum initial reserve of compressed gas, in m^3 at stp
-        /// For helium, the volume needed to store this reserve is about 0.0014m^3 of compressed storage (liquid) for 1m^3 of gas at stp
-        /// </summary>
-        [KSPField(isPersistant = false, guiActive = false)]
-        public float CompressedGasStorage = 15000;
-
-        [KSPField(isPersistant = true, guiActive = true)]
-        public float RemainingCompressedGas = 15000;
-
         /// <summary>
         /// Weight, in kilograms, of 1m^3 of gas at 100kPa and 0°C
         /// Helium is 179g/m^3
@@ -112,35 +96,6 @@ namespace Aerostats
         private GameObject Balloon;
         private LineRenderer Spring;
 
-        private void PlayAnimation(string animationName, float animationSpeed)
-        {
-            foreach (Animation animation in part.FindModelAnimators(animationName))
-            {
-                AnimationState state = animation[animationName];
-                state.normalizedTime = 0;
-                state.normalizedSpeed = animationSpeed;
-                state.enabled = true;
-                animation.Play(animationName);
-            }
-        }
-
-        private bool IsAnimationPlaying(string animationName)
-        {
-            return part.FindModelAnimators(animationName).Any(a => a[animationName].enabled);
-        }
-
-        private void SetInflation(float ratio)
-        {
-            foreach (Animation animation in part.FindModelAnimators(InflateAnimation))
-            {
-                AnimationState state = animation[InflateAnimation];
-                state.normalizedTime = ratio;
-                state.normalizedSpeed = 0;
-                state.enabled = true;
-                animation.Play(InflateAnimation);
-            }
-        }
-
         public override void OnStart(PartModule.StartState state)
         {
             if (!HighLogic.LoadedSceneIsEditor && !HighLogic.LoadedSceneIsFlight) { return; }
@@ -153,7 +108,6 @@ namespace Aerostats
         {
             UnityEngine.Debug.Log("Aerostats: staged");
             ScreenMessages.PostScreenMessage("staged");
-            //PlayAnimation(DeployAnimation, 1.0f);
 
             Balloon = GameObject.CreatePrimitive(PrimitiveType.Sphere);
             Balloon.transform.position = part.Rigidbody.position + part.Rigidbody.transform.up;
@@ -162,8 +116,7 @@ namespace Aerostats
 
             Balloon.rigidbody.angularDrag = 10.0f;
 
-            LiftingGasQuantity = Math.Min(MinimumFillQuantity, RemainingCompressedGas);
+            LiftingGasQuantity = part.RequestResource("Helium", MinimumFillQuantity);
-            RemainingCompressedGas -= LiftingGasQuantity;
 
             Spring = Balloon.AddComponent<LineRenderer>();
             Spring.useWorldSpace = true;
@@ -192,8 +145,6 @@ namespace Aerostats
             }
 
             if (Staged)
-            {
-                //if (!IsAnimationPlaying(DeployAnimation))
             {
                 float externalTemperature = (float)FlightGlobals.getExternalTemperature();
                 float balloonInternalTemperature = externalTemperature;
@@ -208,16 +159,7 @@ namespace Aerostats
                     // infalting balloon
                     float stepFinalQuantity = Math.Min(LiftingGasQuantity + MaxGasFillRate * Time.fixedDeltaTime, Math.Min(LiftingGasTargetQuantity, currentMaxQuantity));
                     float step = Math.Max(stepFinalQuantity - LiftingGasQuantity, 0.0f);
-                        LiftingGasQuantity += step;
+                    LiftingGasQuantity += part.RequestResource("Helium", step);
-                        RemainingCompressedGas -= step;
-
-                        // gas exhausted
-                        if(RemainingCompressedGas < 0)
-                        {
-                            Util.PostSingleScreenMessage("out of gas", "Lifting gas reserve exhausted");
-                            LiftingGasQuantity += RemainingCompressedGas;
-                            RemainingCompressedGas = 0;
-                        }
                 }
                 else
                 {
@@ -238,7 +180,6 @@ namespace Aerostats
                 Inflation = currentGasVolume / MaxBalloonVolume;
 
                 Util.PostSingleScreenMessage("inflation", "Inflation = " + (Inflation * 100.0f).ToString("0.00") + "%");
-                    //SetInflation(Inflation);
 
                 float airDensity = (float)FlightGlobals.getAtmDensity(externalPressure / 1000.0f, externalTemperature, vessel.mainBody);
                 float currentGasDensity = GasDensity * balloonInternalTemperature / ZeroCelsius / externalPressure * StandardPressure;
@@ -286,4 +227,3 @@ namespace Aerostats
         }
     }
 }
-}

TweakScale.cfg

@@ -0,0 +1,16 @@
+@PART[heliumTankRadial]
+{
+    %MODULE[TweakScale]
+    {
+        type = free
+    }
+}
+
+@PART[balloon]
+{
+    %MODULE[TweakScale]
+    {
+        type = stack
+        defaultScale = 1.25
+    }
+}

resources.cfg

@@ -0,0 +1,10 @@
+RESOURCE_DEFINITION
+{
+  name = Helium
+  density = 0.000179 // storage unit is m^3 of Helium at standard pressure (100kPa, 0°C), which has a density of 0.179kg/m^3 (helium tanks store liquid helium which occupies less space, but still weights the same)
+  unitCost = 1.2
+  hsp = 3000
+  flowMode = STAGE_PRIORITY_FLOW
+  transfer = PUMP
+  isTweakable = true
+}