Reorganization + linear falloff equal mass binaries work

NewHorizons/Builder/Body/AsteroidBeltBuilder.cs

@@ -10,7 +10,7 @@ using UnityEngine;
 using Logger = NewHorizons.Utility.Logger;
 using Random = UnityEngine.Random;
 
-namespace NewHorizons.Body
+namespace NewHorizons.Builder.Body
 {
     static class AsteroidBeltBuilder
     {

NewHorizons/Builder/Body/BlackHoleBuilder.cs

@@ -6,7 +6,7 @@ using System.Text;
 using System.Threading.Tasks;
 using UnityEngine;
 
-namespace NewHorizons.General
+namespace NewHorizons.Builder.Body
 {
     static class BlackHoleBuilder
     {

NewHorizons/Builder/Body/CometTailBuilder.cs

@@ -7,7 +7,7 @@ using System.Text;
 using System.Threading.Tasks;
 using UnityEngine;
 
-namespace NewHorizons.Body
+namespace NewHorizons.Builder.Body
 {
     public static class CometTailBuilder
     {

NewHorizons/Builder/Body/GeometryBuilder.cs

@@ -1,7 +1,7 @@
 using UnityEngine;
 using Logger = NewHorizons.Utility.Logger;
 
-namespace NewHorizons.Body
+namespace NewHorizons.Builder.Body
 {
     static class GeometryBuilder
     {

NewHorizons/Builder/Body/HeightMapBuilder.cs

@@ -1,4 +1,5 @@
-using NewHorizons.Body.Geometry;
+using NewHorizons.Body;
+using NewHorizons.Body.Geometry;
 using NewHorizons.External;
 using OWML.Common;
 using System;
@@ -9,7 +10,7 @@ using System.Threading.Tasks;
 using UnityEngine;
 using Logger = NewHorizons.Utility.Logger;
 
-namespace NewHorizons.Body
+namespace NewHorizons.Builder.Body
 {
     static class HeightMapBuilder
     {

NewHorizons/Builder/Body/LavaBuilder.cs

@@ -7,7 +7,7 @@ using System.Threading.Tasks;
 using UnityEngine;
 using Logger = NewHorizons.Utility.Logger;
 
-namespace NewHorizons.General
+namespace NewHorizons.Builder.Body
 {
     static class LavaBuilder
     {

NewHorizons/Builder/Body/ProcGenBuilder.cs

@@ -7,7 +7,7 @@ using System.Text;
 using System.Threading.Tasks;
 using UnityEngine;
 
-namespace NewHorizons.Body
+namespace NewHorizons.Builder.Body
 {
     static class ProcGenBuilder
     {

NewHorizons/Builder/Body/RingBuilder.cs

@@ -8,7 +8,7 @@ using System.Threading.Tasks;
 using UnityEngine;
 using Logger = NewHorizons.Utility.Logger;
 
-namespace NewHorizons.General
+namespace NewHorizons.Builder.Body
 {
     static class RingBuilder
     {

NewHorizons/Builder/Body/StarBuilder.cs

@@ -8,7 +8,7 @@ using System.Threading.Tasks;
 using UnityEngine;
 using Logger = NewHorizons.Utility.Logger;
 
-namespace NewHorizons.Body
+namespace NewHorizons.Builder.Body
 {
     static class StarBuilder
     {
@@ -74,10 +74,10 @@ namespace NewHorizons.Body
                 var giantMaterial = sun.GetComponent<SunController>().GetValue<Material>("_endSurfaceMaterial");
 
                 surface.sharedMaterial = new Material(starModule.Size >= 3000 ? giantMaterial : mainSequenceMaterial);
-                surface.sharedMaterial.color = new Color(colour.r * 4f / 255f, colour.g * 4f / 255f, colour.b * 4f / 255f);
+                surface.sharedMaterial.color = new Color(colour.r * 8f / 255f, colour.g * 8f / 255f, colour.b * 8f / 255f);
                 surface.sharedMaterial.SetTexture("_ColorRamp", Utility.ImageUtilities.TintImage(_colorOverTime, colour));
 
-                sunAtmosphere.transform.Find("AtmoSphere").transform.localScale = Vector3.one * 2f;
+                sunAtmosphere.transform.Find("AtmoSphere").transform.localScale = Vector3.one * (starModule.Size + 1000)/starModule.Size;
                 foreach (var lod in sunAtmosphere.transform.Find("AtmoSphere").GetComponentsInChildren<MeshRenderer>())
                 {
                     lod.material.SetColor("_SkyColor", colour);

NewHorizons/Builder/Body/WaterBuilder.cs

@@ -3,7 +3,7 @@ using OWML.Utils;
 using UnityEngine;
 using Logger = NewHorizons.Utility.Logger;
 
-namespace NewHorizons.Body
+namespace NewHorizons.Builder.Body
 {
     static class WaterBuilder
     {

NewHorizons/Builder/General/AmbientLightBuilder.cs

@@ -4,7 +4,7 @@ using OWML.Utils;
 using UnityEngine;
 using Logger = NewHorizons.Utility.Logger;
 
-namespace NewHorizons.General
+namespace NewHorizons.Builder.General
 {
     static class AmbientLightBuilder
     {

NewHorizons/Builder/General/BaseBuilder.cs

@@ -2,14 +2,15 @@
 using NewHorizons.OrbitalPhysics;
 using NewHorizons.Utility;
 using OWML.Utils;
+using System;
 using UnityEngine;
 using Logger = NewHorizons.Utility.Logger;
 
-namespace NewHorizons.General
+namespace NewHorizons.Builder.General
 {
     static class BaseBuilder
     {
-        public static MTuple Make(GameObject body, AstroObject primaryBody, Vector3 positionVector, IPlanetConfig config)
+        public static Tuple<AstroObject, OWRigidbody> Make(GameObject body, AstroObject primaryBody, Vector3 positionVector, IPlanetConfig config)
         {
             Rigidbody RB = body.AddComponent<Rigidbody>();
             RB.mass = 10000;
@@ -31,10 +32,14 @@ namespace NewHorizons.General
             OWRB.SetValue("_rigidbody", RB);
             OWRB.SetValue("_kinematicRigidbody", KRB);
 
-            DetectorBuilder.Make(body, primaryBody);
-
             AstroObject AO = body.AddComponent<AstroObject>();
-            AO.SetValue("_type", config.Orbit.IsMoon ? AstroObject.Type.Moon : AstroObject.Type.Planet);
+
+            var type = AstroObject.Type.Planet;
+            if (config.Orbit.IsMoon) type = AstroObject.Type.Moon;
+            else if (config.Base.HasCometTail) type = AstroObject.Type.Comet;
+            else if (config.Star != null) type = AstroObject.Type.Star;
+            else if (config.FocalPoint != null) type = AstroObject.Type.None;
+            AO.SetValue("_type", type);
             AO.SetValue("_name", AstroObject.Name.CustomString);
             AO.SetValue("_customName", config.Name);
             AO.SetValue("_primaryBody", primaryBody);
@@ -46,7 +51,7 @@ namespace NewHorizons.General
                 alignment.SetValue("_usePhysicsToRotate", true);
             }
 
-            return new MTuple(AO, OWRB);
+            return new Tuple<AstroObject, OWRigidbody>(AO, OWRB);
         }
     }
 }

NewHorizons/Builder/General/DetectorBuilder.cs

@@ -0,0 +1,147 @@
+using NewHorizons.Builder.Orbital;
+using NewHorizons.External;
+using NewHorizons.OrbitalPhysics;
+using OWML.Utils;
+using System;
+using System.Collections.Generic;
+using System.Reflection;
+using UnityEngine;
+using NewHorizons.Utility;
+using Logger = NewHorizons.Utility.Logger;
+
+namespace NewHorizons.Builder.General
+{
+    static class DetectorBuilder
+    {
+        public static void Make(GameObject body, OWRigidbody OWRB, AstroObject primaryBody, AstroObject astroObject)
+        {
+            GameObject detectorGO = new GameObject("FieldDetector");
+            detectorGO.SetActive(false);
+            detectorGO.transform.parent = body.transform;
+            detectorGO.transform.localPosition = Vector3.zero;
+            detectorGO.layer = 20;
+
+            ConstantForceDetector forceDetector = detectorGO.AddComponent<ConstantForceDetector>();
+            forceDetector.SetValue("_inheritElement0", true);
+            OWRB.RegisterAttachedForceDetector(forceDetector);
+
+            GravityVolume parentGravityVolume = primaryBody.GetAttachedOWRigidbody().GetAttachedGravityVolume();
+            if (parentGravityVolume != null)
+            {
+                forceDetector.SetValue("_detectableFields", new ForceVolume[] { parentGravityVolume });
+            }
+            else
+            {
+                // It's probably a focal point (or its just broken)
+                var binaryFocalPoint = primaryBody.gameObject.GetComponent<BinaryFocalPoint>();
+                if(binaryFocalPoint != null)
+                {
+                    if(astroObject.GetCustomName().Equals(binaryFocalPoint.PrimaryName)) {
+                        binaryFocalPoint.Primary = astroObject;
+                        if (binaryFocalPoint.Secondary != null)
+                        {
+                            var secondaryRB = binaryFocalPoint.Secondary.GetAttachedOWRigidbody();
+                            SetBinaryForceDetectableFields(binaryFocalPoint, forceDetector, secondaryRB.GetAttachedForceDetector(), OWRB, secondaryRB);
+                        }
+                    }
+                    else if (astroObject.GetCustomName().Equals(binaryFocalPoint.SecondaryName))
+                    {
+                        binaryFocalPoint.Secondary = astroObject;
+                        if (binaryFocalPoint.Primary != null)
+                        {
+                            var primaryRB = binaryFocalPoint.Primary.GetAttachedOWRigidbody();
+                            SetBinaryForceDetectableFields(binaryFocalPoint, primaryRB.GetAttachedForceDetector(), forceDetector, primaryRB, OWRB);
+                        }
+                    }
+                    else
+                    {
+                        // It's a planet
+                        binaryFocalPoint.Planets.Add(astroObject);
+                        if(binaryFocalPoint.Primary != null && binaryFocalPoint.Secondary != null)
+                        {
+                            var primaryGravityVolume = binaryFocalPoint.Primary.GetGravityVolume();
+                            var secondaryGravityVolume = binaryFocalPoint.Secondary.GetGravityVolume();
+                            forceDetector.SetValue("_detectableFields", new ForceVolume[] { primaryGravityVolume, secondaryGravityVolume });
+                        }
+                    }
+                }
+            }
+
+            detectorGO.SetActive(true);
+        }
+
+        private static void SetBinaryForceDetectableFields(BinaryFocalPoint point, ForceDetector primaryCFD, ForceDetector secondaryCFD, OWRigidbody primaryRB, OWRigidbody secondaryRB)
+        {
+            Logger.Log($"Setting up binary focal point for {point.name}");
+
+            var primary = point.Primary;
+            var secondary = point.Secondary;
+            var planets = point.Planets;
+
+            
+            // Binaries have to use inverse square gravity so overwrite it now
+            var primaryGV = primary.GetGravityVolume();
+            //primaryGV.SetValue("_falloffType", primaryGV.GetType().GetNestedType("FalloffType", BindingFlags.NonPublic).GetField("inverseSquared").GetValue(primaryGV));
+            //primaryGV.SetValue("_falloffExponent", 2);
+
+            var secondaryGV = secondary.GetGravityVolume();
+            //secondaryGV.SetValue("_falloffType", secondaryGV.GetType().GetNestedType("FalloffType", BindingFlags.NonPublic).GetField("inverseSquared").GetValue(secondaryGV));
+            //secondaryGV.SetValue("_falloffExponent", 2);
+            
+
+            // Very specific distance between them
+            Vector3 separation = primary.transform.position - secondary.transform.position;
+            var Gm1 = primaryGV.GetStandardGravitationalParameter();
+            var Gm2 = secondaryGV.GetStandardGravitationalParameter();
+            float r1 = separation.magnitude * Gm2 / (Gm1 + Gm2);
+            float r2 = separation.magnitude * Gm1 / (Gm1 + Gm2);
+
+            primary.transform.position = point.transform.position + r1 * separation.normalized;
+            secondary.transform.position = point.transform.position - r2 * separation.normalized;
+
+            // Set detectable fields
+            primaryCFD.SetValue("_detectableFields", new ForceVolume[] { secondaryGV });
+            primaryCFD.SetValue("_inheritDetector", point.GetAttachedOWRigidbody().GetAttachedForceDetector());
+            primaryCFD.SetValue("_activeInheritedDetector", point.GetAttachedOWRigidbody().GetAttachedForceDetector());
+            primaryCFD.SetValue("_inheritElement0", false);
+
+            secondaryCFD.SetValue("_detectableFields", new ForceVolume[] { primaryGV });
+            secondaryCFD.SetValue("_inheritDetector", point.GetAttachedOWRigidbody().GetAttachedForceDetector());
+            secondaryCFD.SetValue("_activeInheritedDetector", point.GetAttachedOWRigidbody().GetAttachedForceDetector());
+            secondaryCFD.SetValue("_inheritElement0", false);
+
+            // Update speeds
+            var direction = Vector3.Cross(separation, Vector3.up).normalized;
+            var m1 = primaryRB.GetMass();
+            var m2 = secondaryRB.GetMass();
+            var reducedMass = m1 * m2 / (m1 + m2);
+            var r = separation.magnitude;
+            float v1 = OrbitalHelper.GetOrbitalVelocity(r, new Gravity(secondaryGV.GetFalloffExponent(), reducedMass), KeplerElements.FromTrueAnomaly(0.5f, r, 0, 0, 0, 0));
+            float v2 = OrbitalHelper.GetOrbitalVelocity(r, new Gravity(primaryGV.GetFalloffExponent(), reducedMass), KeplerElements.FromTrueAnomaly(0.5f, r, 0, 0, 0, 180));
+
+            Logger.Log($"Speed: {v1} {v2}");
+
+            primaryRB.UpdateCenterOfMass();
+            primaryRB.AddVelocityChange(direction * v1);
+            secondaryRB.UpdateCenterOfMass();                                       
+            secondaryRB.AddVelocityChange(direction * -v2);
+
+
+
+            /*
+            //Hacky but whatever
+            var primaryInitialMotion = primary.gameObject.GetComponent<InitialMotion>();
+            if(primaryInitialMotion.GetValue<bool>("_isInitVelocityDirty"))
+                primaryInitialMotion.SetValue("_cachedInitVelocity", OWPhysics.CalculateOrbitVelocity(secondaryRB, primaryRB, 0f));
+            else
+                primaryInitialMotion.SetPrimaryBody(secondaryRB);
+            
+            var secondaryInitialMotion = primary.gameObject.GetComponent<InitialMotion>();
+            if (secondaryInitialMotion.GetValue<bool>("_isInitVelocityDirty"))
+                secondaryInitialMotion.SetValue("_cachedInitVelocity", OWPhysics.CalculateOrbitVelocity(primaryRB, secondaryRB, 0f));
+            else
+                secondaryInitialMotion.SetPrimaryBody(primaryRB);
+            */
+        }
+    }
+}

NewHorizons/Builder/General/GravityBuilder.cs

@@ -4,7 +4,7 @@ using System.Reflection;
 using UnityEngine;
 using Logger = NewHorizons.Utility.Logger;
 
-namespace NewHorizons.General
+namespace NewHorizons.Builder.General
 {
     static class GravityBuilder
     {

NewHorizons/Builder/General/MarkerBuilder.cs

@@ -4,7 +4,7 @@ using System.Reflection;
 using UnityEngine;
 using Logger = NewHorizons.Utility.Logger;
 
-namespace NewHorizons.General
+namespace NewHorizons.Builder.General
 {
     static class MarkerBuilder
     {

NewHorizons/Builder/General/PlanetDestroyer.cs

@@ -8,7 +8,7 @@ using System.Threading.Tasks;
 using UnityEngine;
 using Logger = NewHorizons.Utility.Logger;
 
-namespace NewHorizons.General
+namespace NewHorizons.Builder.General
 {
     static class PlanetDestroyer
     {

NewHorizons/Builder/General/RFVolumeBuilder.cs

@@ -3,7 +3,7 @@ using OWML.Utils;
 using UnityEngine;
 using Logger = NewHorizons.Utility.Logger;
 
-namespace NewHorizons.General
+namespace NewHorizons.Builder.General
 {
     static class RFVolumeBuilder
     {

NewHorizons/Builder/General/SectorBuilder.cs

@@ -4,7 +4,7 @@ using System.Collections.Generic;
 using UnityEngine;
 using Logger = NewHorizons.Utility.Logger;
 
-namespace NewHorizons.Body
+namespace NewHorizons.Builder.General
 {
     static class MakeSector
     {

NewHorizons/Builder/General/SpawnPointBuilder.cs

@@ -4,7 +4,7 @@ using System;
 using UnityEngine;
 using Logger = NewHorizons.Utility.Logger;
 
-namespace NewHorizons.General
+namespace NewHorizons.Builder.General
 {
     static class SpawnPointBuilder
     {

NewHorizons/Builder/Orbital/FocalPointBuilder.cs

@@ -0,0 +1,21 @@
+using NewHorizons.External;
+using NewHorizons.OrbitalPhysics;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using UnityEngine;
+
+namespace NewHorizons.Builder.Orbital
+{
+    static class FocalPointBuilder
+    {
+        public static void Make(GameObject go, FocalPointModule module)
+        {
+            var binary = go.AddComponent<BinaryFocalPoint>();
+            binary.PrimaryName = module.Primary;
+            binary.SecondaryName = module.Secondary;
+        }
+    }
+}

NewHorizons/Builder/Orbital/InitialMotionBuilder.cs

@@ -11,7 +11,7 @@ using Logger = NewHorizons.Utility.Logger;
 using System.Reflection;
 using NewHorizons.Utility;
 
-namespace NewHorizons.General
+namespace NewHorizons.Builder.Orbital
 {
     static class InitialMotionBuilder
     {
@@ -33,23 +33,31 @@ namespace NewHorizons.General
             */
 
             InitialMotion initialMotion = body.AddComponent<InitialMotion>();
-            initialMotion.SetPrimaryBody(primaryBody.GetAttachedOWRigidbody());
+            return Update(initialMotion, body, primaryBody, OWRB, orbit);
-            initialMotion.SetValue("_orbitAngle", orbit.Inclination);
+        }
-            initialMotion.SetValue("_isGlobalAxis", false);
+
-            initialMotion.SetValue("_initAngularSpeed", orbit.SiderealPeriod == 0 ? 0.02f : 1.0f / orbit.SiderealPeriod);
+        public static InitialMotion Update(InitialMotion initialMotion, GameObject body, AstroObject primaryBody, OWRigidbody OWRB, OrbitModule orbit)
-            if(orbit.Eccentricity != 0)
+        {
+            if (!orbit.IsStatic)
             {
-                // Calculate speed at apoapsis
+                initialMotion.SetPrimaryBody(primaryBody.GetAttachedOWRigidbody());
-                var eccSpeed = OrbitalHelper.Visviva(primaryBody.GetGravityVolume().GetFalloffType(),
+                initialMotion.SetValue("_orbitAngle", orbit.Inclination);
-                    primaryBody.GetGravityVolume().GetStandardGravitationalParameter(),
+                initialMotion.SetValue("_isGlobalAxis", false);
-                    orbit.SemiMajorAxis * (1 + orbit.Eccentricity),
+                if (orbit.Eccentricity != 0 && primaryBody.GetGravityVolume() != null)
-                    orbit.SemiMajorAxis,
+                {
-                    orbit.Eccentricity
+                    // Calculate speed at apoapsis
-                    );
+                    KeplerElements kepler = KeplerElements.FromOrbitModule(orbit);
-                var circularSpeed = OWPhysics.CalculateOrbitVelocity(primaryBody.GetAttachedOWRigidbody(), OWRB).magnitude;
+                    Gravity gravity = new Gravity(primaryBody.GetGravityVolume());
-                initialMotion.SetValue("_orbitImpulseScalar", eccSpeed / circularSpeed);
+
+                    var eccSpeed = OrbitalHelper.GetOrbitalVelocity(kepler.Apoapsis, gravity, kepler);
+                    var circularSpeed = OWPhysics.CalculateOrbitVelocity(primaryBody.GetAttachedOWRigidbody(), OWRB).magnitude;
+
+                    initialMotion.SetValue("_orbitImpulseScalar", eccSpeed / circularSpeed);
+                }
             }
 
+            // Rotation
+            initialMotion.SetValue("_initAngularSpeed", orbit.SiderealPeriod == 0 ? 0f : 1.0f / orbit.SiderealPeriod);
             var rotationAxis = Quaternion.AngleAxis(orbit.AxialTilt + orbit.Inclination, Vector3.right) * Vector3.up;
             body.transform.rotation = Quaternion.FromToRotation(Vector3.up, rotationAxis);
 

NewHorizons/Builder/Orbital/OrbitlineBuilder.cs

@@ -5,7 +5,7 @@ using OWML.Utils;
 using UnityEngine;
 using Logger = NewHorizons.Utility.Logger;
 
-namespace NewHorizons.General
+namespace NewHorizons.Builder.Orbital
 {
     static class OrbitlineBuilder
     {
@@ -15,29 +15,27 @@ namespace NewHorizons.General
             orbitGO.transform.parent = body.transform;
             orbitGO.transform.localPosition = Vector3.zero;
 
-            var LR = orbitGO.AddComponent<LineRenderer>();
+            var lineRenderer = orbitGO.AddComponent<LineRenderer>();
 
-            var thLR = GameObject.Find("OrbitLine_CO").GetComponent<LineRenderer>();
+            lineRenderer.material = GameObject.Find("OrbitLine_CO").GetComponent<LineRenderer>().material;
-
+            lineRenderer.useWorldSpace = false;
-            LR.material = thLR.material;
+            lineRenderer.loop = false;
-            LR.useWorldSpace = false;
-            LR.loop = false;
 
             if(orbit.Eccentricity == 0)
             {
-                OrbitLine ol = orbitGO.AddComponent<OrbitLine>();
+                OrbitLine orbitLine = orbitGO.AddComponent<OrbitLine>();
-                ol.SetValue("_astroObject", astroobject);
+                orbitLine.SetValue("_astroObject", astroobject);
-                ol.SetValue("_fade", isMoon);
+                orbitLine.SetValue("_fade", isMoon);
-                ol.SetValue("_lineWidth", 0.5f);
+                orbitLine.SetValue("_lineWidth", 0.3f);
-                typeof(OrbitLine).GetMethod("InitializeLineRenderer", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance).Invoke(ol, new object[] { });
+                typeof(OrbitLine).GetMethod("InitializeLineRenderer", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance).Invoke(orbitLine, new object[] { });
             }
             else
             {
-                OrbitLine ol = orbitGO.AddComponent<EllipticOrbitLine>();
+                OrbitLine orbitLine = orbitGO.AddComponent<EllipticOrbitLine>();
-                ol.SetValue("_astroObject", astroobject);
+                orbitLine.SetValue("_astroObject", astroobject);
-                ol.SetValue("_fade", isMoon);
+                orbitLine.SetValue("_fade", isMoon);
-                ol.SetValue("_lineWidth", 0.5f);
+                orbitLine.SetValue("_lineWidth", 0.3f);
-                typeof(OrbitLine).GetMethod("InitializeLineRenderer", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance).Invoke(ol, new object[] { });
+                typeof(OrbitLine).GetMethod("InitializeLineRenderer", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance).Invoke(orbitLine, new object[] { });
             }
 
             /*

NewHorizons/External/FocalPointModule.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace NewHorizons.External
+{
+    public class FocalPointModule
+    {
+        public string Primary { get; set; }
+        public string Secondary { get; set; }
+    }
+}

NewHorizons/External/IPlanetConfig.cs

@@ -15,6 +15,7 @@ namespace NewHorizons.External
         ProcGenModule ProcGen { get; }
         AsteroidBeltModule AsteroidBelt { get; }
         StarModule Star { get; }
+        FocalPointModule FocalPoint { get; }
         SpawnModule Spawn { get; }
     }
 }

NewHorizons/External/OrbitModule.cs

@@ -20,5 +20,6 @@ namespace NewHorizons.External
         public float SiderealPeriod { get; set; }
         public bool IsTidallyLocked { get; set; }
         public bool ShowOrbitLine { get; set; } = true;
+        public bool IsStatic { get; set; }
     }
 }

NewHorizons/External/PlanetConfig.cs

@@ -1,6 +1,7 @@
 using NewHorizons.Utility;
 using System;
 using System.Collections.Generic;
+using System.Globalization;
 
 namespace NewHorizons.External
 {
@@ -18,6 +19,7 @@ namespace NewHorizons.External
         public ProcGenModule ProcGen { get; set; }
         public AsteroidBeltModule AsteroidBelt { get; set; }
         public StarModule Star { get; set; }
+        public FocalPointModule FocalPoint { get; set; }
         public SpawnModule Spawn { get; set; }
 
         public PlanetConfig(Dictionary<string, object> dict)
@@ -30,6 +32,31 @@ namespace NewHorizons.External
 
             foreach (var item in dict)
             {
+                var property = typeof(PlanetConfig).GetProperty(item.Key, System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Instance);
+                if(property == null)
+                    property = typeof(PlanetConfig).GetProperty(item.Key.ToCamelCase(), System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Instance);
+                if (property == null)
+                    property = typeof(PlanetConfig).GetProperty(item.Key.ToTitleCase(), System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Instance);
+
+                if (property != null)
+                {
+                    if (property.PropertyType.BaseType == typeof(Module))
+                    {
+                        if (property.GetValue(this) == null)
+                        {
+                            var module = Activator.CreateInstance(property.PropertyType);
+                            property.SetValue(this, module);
+                        }
+                        ((Module)property.GetValue(this)).Build(item.Value as Dictionary<string, object>);
+                    }
+                    else
+                    {
+                        property.SetValue(this, Convert.ChangeType(item.Value, property.PropertyType));
+                    }
+                }
+                else Logger.LogError($"{item.Key} {item.Value} is not valid. Is your config formatted correctly?");
+
+                /*
                 switch(item.Key)
                 {
                     case "Base":
@@ -68,6 +95,7 @@ namespace NewHorizons.External
                         else Logger.LogError($"{item.Key} {item.Value} is not valid. Is your config formatted correctly?");
                         break;
                 }
+                */
             }
         }
     }

NewHorizons/General/DetectorBuilder.cs

@@ -1,28 +0,0 @@
-using OWML.Utils;
-using System;
-using UnityEngine;
-using Logger = NewHorizons.Utility.Logger;
-
-namespace NewHorizons.General
-{
-    static class DetectorBuilder
-    {
-        public static void Make(GameObject body, AstroObject primaryBody)
-        {
-            GameObject detectorGO = new GameObject("FieldDetector");
-            detectorGO.SetActive(false);
-            detectorGO.transform.parent = body.transform;
-            detectorGO.transform.localPosition = Vector3.zero;
-            detectorGO.layer = 20;
-
-            ConstantForceDetector CFD = detectorGO.AddComponent<ConstantForceDetector>();
-
-            GravityVolume parentGravityVolume = primaryBody.GetAttachedOWRigidbody().GetAttachedGravityVolume();
-
-            CFD.SetValue("_detectableFields", new ForceVolume[] { parentGravityVolume });
-            CFD.SetValue("_inheritElement0", true);
-
-            detectorGO.SetActive(true);
-        }
-    }
-}

NewHorizons/Main.cs

@@ -1,7 +1,9 @@
 using NewHorizons.Atmosphere;
 using NewHorizons.Body;
+using NewHorizons.Builder.Body;
+using NewHorizons.Builder.General;
+using NewHorizons.Builder.Orbital;
 using NewHorizons.External;
-using NewHorizons.General;
 using NewHorizons.OrbitalPhysics;
 using NewHorizons.Utility;
 using OWML.Common;
@@ -34,7 +36,7 @@ namespace NewHorizons
             return new NewHorizonsApi();
         }
 
-        void Start()
+        public void Start()
         {
             SceneManager.sceneLoaded += OnSceneLoaded;
             Instance = this;
@@ -54,8 +56,9 @@ namespace NewHorizons
             }
         }
 
-        void Destroy()
+        public void Destroy()
         {
+            Logger.Log($"Destroying NewHorizons");
             SceneManager.sceneLoaded -= OnSceneLoaded;
         }
 
@@ -73,9 +76,11 @@ namespace NewHorizons
 
             // Stars then planets then moons
             BodyList = BodyList.OrderBy(b => 
-                (b.Config.BuildPriority != -1 ? b.Config.BuildPriority : (b.Config.Star != null) ? 0 :
+                (b.Config.BuildPriority != -1 ? b.Config.BuildPriority : 
+                (b.Config.FocalPoint != null ? 0 : 
+                (b.Config.Star != null) ? 0 :
                 (b.Config.Orbit.IsMoon ? 2 : 1)
-                )).ToList();
+                ))).ToList();
 
             var flagNoneLoadedThisPass = true;
             while(BodyList.Count != 0)
@@ -248,14 +253,14 @@ namespace NewHorizons
             var positionVector = rot * incRot * Vector3.left * body.Config.Orbit.SemiMajorAxis * (1 + body.Config.Orbit.Eccentricity);
 
             var outputTuple = BaseBuilder.Make(go, primaryBody, positionVector, body.Config);
-            var ao = (AstroObject)outputTuple.Items[0];
+            var ao = (AstroObject)outputTuple.Item1;
-            var rb = (OWRigidbody)outputTuple.Items[1];
+            var owRigidBody = (OWRigidbody)outputTuple.Item2;
 
             if (body.Config.Base.SurfaceGravity != 0)
                 GravityBuilder.Make(go, ao, body.Config.Base.SurfaceGravity, sphereOfInfluence, body.Config.Base.SurfaceSize, body.Config.Base.GravityFallOff);
             
             if(body.Config.Base.HasReferenceFrame)
-                RFVolumeBuilder.Make(go, rb, sphereOfInfluence);
+                RFVolumeBuilder.Make(go, owRigidBody, sphereOfInfluence);
 
             if (body.Config.Base.HasMapMarker)
                 MarkerBuilder.Make(go, body.Config.Name, body.Config.Orbit.IsMoon, body.Config.Star != null);
@@ -263,7 +268,8 @@ namespace NewHorizons
             if (body.Config.Base.HasAmbientLight)
                 AmbientLightBuilder.Make(go, sphereOfInfluence);
 
-            var sector = MakeSector.Make(go, rb, sphereOfInfluence);
+            var sector = MakeSector.Make(go, owRigidBody, sphereOfInfluence);
+            ao.SetValue("_rootSector", sector);
 
             VolumesBuilder.Make(go, body.Config.Base.SurfaceSize, sphereOfInfluence);
 
@@ -279,15 +285,14 @@ namespace NewHorizons
             if (body.Config.Star != null)
                 StarBuilder.Make(go, sector, body.Config.Star);
 
+            if (body.Config.FocalPoint != null)
+                FocalPointBuilder.Make(go, body.Config.FocalPoint);
+
             // Do stuff that's shared between generating new planets and updating old ones
-            go = SharedGenerateBody(body, go, sector, rb);
+            go = SharedGenerateBody(body, go, sector, owRigidBody);
 
             body.Object = go;
 
-            // Some things have to be done the second tick
-            if(body.Config.Orbit != null && body.Config.Orbit.ShowOrbitLine)
-                Instance.ModHelper.Events.Unity.FireOnNextUpdate(() => OrbitlineBuilder.Make(body.Object, ao, body.Config.Orbit.IsMoon, body.Config.Orbit));
-
             // Now that we're done move the planet into place
             go.transform.parent = Locator.GetRootTransform();
             go.transform.position = positionVector + primaryBody.transform.position;
@@ -298,14 +303,22 @@ namespace NewHorizons
             }
 
             // Have to do this after setting position
-            InitialMotionBuilder.Make(go, primaryBody, rb, body.Config.Orbit);
+            InitialMotionBuilder.Make(go, primaryBody, owRigidBody, body.Config.Orbit);
+
+            //if (!body.Config.Orbit.IsStatic) DetectorBuilder.Make(go, owRigidBody, primaryBody, ao);
+            if (!body.Config.Orbit.IsStatic) Instance.ModHelper.Events.Unity.FireOnNextUpdate(() => DetectorBuilder.Make(go, owRigidBody, primaryBody, ao));
 
             // Spawning on other planets is a bit hacky so we do it last
             if (body.Config.Spawn != null)
             {
-                SpawnPointBuilder.Make(go, body.Config.Spawn, rb);
+                SpawnPointBuilder.Make(go, body.Config.Spawn, owRigidBody);
             }
 
+            // Some things have to be done the second tick
+            if (body.Config.Orbit != null && body.Config.Orbit.ShowOrbitLine)
+                Instance.ModHelper.Events.Unity.FireOnNextUpdate(() => OrbitlineBuilder.Make(body.Object, ao, body.Config.Orbit.IsMoon, body.Config.Orbit));
+
+
             if (ao.GetAstroObjectName() == AstroObject.Name.CustomString) AstroObjectLocator.RegisterCustomAstroObject(ao);
 
             Logger.Log("Generation of [" + body.Config.Name + "] completed.", Logger.LogType.Log);

NewHorizons/NewHorizons.csproj

@@ -229,18 +229,20 @@
     </Reference>
   </ItemGroup>
   <ItemGroup>
-    <Compile Include="Atmosphere\FogBuilder.cs" />
+    <Compile Include="Builder\Atmosphere\FogBuilder.cs" />
-    <Compile Include="Body\AsteroidBeltBuilder.cs" />
+    <Compile Include="Builder\Body\AsteroidBeltBuilder.cs" />
-    <Compile Include="Body\CometTailBuilder.cs" />
+    <Compile Include="Builder\Body\CometTailBuilder.cs" />
-    <Compile Include="Body\Geometry\CubeSphere.cs" />
+    <Compile Include="Builder\Body\Geometry\CubeSphere.cs" />
-    <Compile Include="Body\Geometry\Icosphere.cs" />
+    <Compile Include="Builder\Body\Geometry\Icosphere.cs" />
-    <Compile Include="Body\Geometry\Perlin.cs" />
+    <Compile Include="Builder\Body\Geometry\Perlin.cs" />
-    <Compile Include="Body\HeightMapBuilder.cs" />
+    <Compile Include="Builder\Body\HeightMapBuilder.cs" />
-    <Compile Include="Body\ProcGenBuilder.cs" />
+    <Compile Include="Builder\Body\ProcGenBuilder.cs" />
-    <Compile Include="Body\StarBuilder.cs" />
+    <Compile Include="Builder\Body\StarBuilder.cs" />
+    <Compile Include="Builder\Orbital\FocalPointBuilder.cs" />
     <Compile Include="External\AsteroidBeltModule.cs" />
     <Compile Include="External\AtmosphereModule.cs" />
     <Compile Include="External\BaseModule.cs" />
+    <Compile Include="External\FocalPointModule.cs" />
     <Compile Include="External\HeightMapModule.cs" />
     <Compile Include="External\Module.cs" />
     <Compile Include="External\OrbitModule.cs" />
@@ -248,34 +250,37 @@
     <Compile Include="External\RingModule.cs" />
     <Compile Include="External\SpawnModule.cs" />
     <Compile Include="External\StarModule.cs" />
-    <Compile Include="General\BaseBuilder.cs" />
+    <Compile Include="Builder\General\BaseBuilder.cs" />
-    <Compile Include="Body\BlackHoleBuilder.cs" />
+    <Compile Include="Builder\Body\BlackHoleBuilder.cs" />
-    <Compile Include="General\DetectorBuilder.cs" />
+    <Compile Include="Builder\General\DetectorBuilder.cs" />
-    <Compile Include="General\GravityBuilder.cs" />
+    <Compile Include="Builder\General\GravityBuilder.cs" />
-    <Compile Include="Body\LavaBuilder.cs" />
+    <Compile Include="Builder\Body\LavaBuilder.cs" />
-    <Compile Include="General\InitialMotionBuilder.cs" />
+    <Compile Include="Builder\Orbital\InitialMotionBuilder.cs" />
-    <Compile Include="General\MarkerBuilder.cs" />
+    <Compile Include="Builder\General\MarkerBuilder.cs" />
-    <Compile Include="General\OrbitlineBuilder.cs" />
+    <Compile Include="Builder\Orbital\OrbitlineBuilder.cs" />
-    <Compile Include="General\PlanetDestroyer.cs" />
+    <Compile Include="Builder\General\PlanetDestroyer.cs" />
-    <Compile Include="General\RFVolumeBuilder.cs" />
+    <Compile Include="Builder\General\RFVolumeBuilder.cs" />
-    <Compile Include="Body\RingBuilder.cs" />
+    <Compile Include="Builder\Body\RingBuilder.cs" />
-    <Compile Include="General\SectorBuilder.cs" />
+    <Compile Include="Builder\General\SectorBuilder.cs" />
-    <Compile Include="General\SpawnPointBuilder.cs" />
+    <Compile Include="Builder\General\SpawnPointBuilder.cs" />
+    <Compile Include="OrbitalPhysics\BinaryFocalPoint.cs" />
     <Compile Include="OrbitalPhysics\CartesianStateVectors.cs" />
+    <Compile Include="OrbitalPhysics\Gravity.cs" />
+    <Compile Include="OrbitalPhysics\KeplerElements.cs" />
     <Compile Include="OrbitalPhysics\ParameterizedInitialMotion.cs" />
     <Compile Include="OrbitalPhysics\OrbitalHelper.cs" />
     <Compile Include="Utility\AddDebugShape.cs" />
-    <Compile Include="General\AmbientLightBuilder.cs" />
+    <Compile Include="Builder\General\AmbientLightBuilder.cs" />
     <Compile Include="External\IPlanetConfig.cs" />
     <Compile Include="External\PlanetConfig.cs" />
-    <Compile Include="Body\GeometryBuilder.cs" />
+    <Compile Include="Builder\Body\GeometryBuilder.cs" />
-    <Compile Include="Body\WaterBuilder.cs" />
+    <Compile Include="Builder\Body\WaterBuilder.cs" />
-    <Compile Include="Atmosphere\AirBuilder.cs" />
+    <Compile Include="Builder\Atmosphere\AirBuilder.cs" />
-    <Compile Include="Atmosphere\AtmosphereBuilder.cs" />
+    <Compile Include="Builder\Atmosphere\AtmosphereBuilder.cs" />
-    <Compile Include="Atmosphere\CloudsBuilder.cs" />
+    <Compile Include="Builder\Atmosphere\CloudsBuilder.cs" />
-    <Compile Include="Atmosphere\EffectsBuilder.cs" />
+    <Compile Include="Builder\Atmosphere\EffectsBuilder.cs" />
-    <Compile Include="Atmosphere\SunOverrideBuilder.cs" />
+    <Compile Include="Builder\Atmosphere\SunOverrideBuilder.cs" />
-    <Compile Include="Atmosphere\VolumesBuilder.cs" />
+    <Compile Include="Builder\Atmosphere\VolumesBuilder.cs" />
     <Compile Include="Main.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="Utility\AddToUITable.cs" />
@@ -288,7 +293,6 @@
     <Compile Include="Utility\NewHorizonBody.cs" />
     <Compile Include="Utility\NewHorizonExtensions.cs" />
     <Compile Include="Utility\MColor32.cs" />
-    <Compile Include="Utility\MTuple.cs" />
     <Compile Include="Utility\MVector3.cs" />
     <Compile Include="Utility\Patches.cs" />
   </ItemGroup>

NewHorizons/OrbitalPhysics/BinaryFocalPoint.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using UnityEngine;
+
+namespace NewHorizons.OrbitalPhysics
+{
+    public class BinaryFocalPoint : MonoBehaviour
+    {
+        public string PrimaryName = null;
+        public string SecondaryName = null;
+
+        public AstroObject Primary = null;
+        public AstroObject Secondary = null;
+
+        public List<AstroObject> Planets { get; private set; } = new List<AstroObject>(); 
+    }
+}

NewHorizons/OrbitalPhysics/Gravity.cs

@@ -0,0 +1,27 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using NewHorizons.Utility;
+
+namespace NewHorizons.OrbitalPhysics
+{
+    public class Gravity
+    {
+        public float Exponent { get; }
+        public float Mass { get; }
+
+        public Gravity(float exponent, float mass)
+        {
+            Exponent = exponent;
+            Mass = mass;
+        }
+
+        public Gravity(GravityVolume gv)
+        {
+            Exponent = gv.GetFalloffExponent();
+            Mass = gv.GetStandardGravitationalParameter() / GravityVolume.GRAVITATIONAL_CONSTANT;
+        }
+    }
+}

NewHorizons/OrbitalPhysics/KeplerElements.cs

@@ -0,0 +1,101 @@
+using NewHorizons.External;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using UnityEngine;
+
+namespace NewHorizons.OrbitalPhysics
+{
+    public class KeplerElements
+    {
+        public float LongitudeOfAscendingNode { get; }
+        public float Eccentricity { get; }
+        public float SemiMajorAxis { get; }
+        public float Inclination { get; }
+        public float ArgumentOfPeriapsis { get; }
+        public float TrueAnomaly { get; }
+        public float EccentricAnomaly { get; }
+        public float MeanAnomaly { get; }
+        public float SemiMinorAxis { get; }
+        public float Focus { get; }
+        public float Apoapsis { get; }
+        public float Periapsis { get; }
+
+        private KeplerElements(float e, float a, float i, float longitudeOfAscendingNode, float argumentOfPeriapsis, float trueAnomaly, float eccentricAnomaly, float meanAnomaly)
+        {
+            LongitudeOfAscendingNode = longitudeOfAscendingNode;
+            Eccentricity = e;
+            SemiMajorAxis = a;
+            Inclination = i;
+            ArgumentOfPeriapsis = argumentOfPeriapsis;
+            TrueAnomaly = trueAnomaly;
+
+            SemiMinorAxis = SemiMajorAxis * Mathf.Sqrt(1 - Eccentricity * Eccentricity);
+            Focus = Mathf.Sqrt((SemiMajorAxis * SemiMajorAxis) - (SemiMinorAxis * SemiMinorAxis));
+            Apoapsis = SemiMajorAxis + Focus;
+            Periapsis = SemiMajorAxis - Focus;
+
+            EccentricAnomaly = eccentricAnomaly;
+            MeanAnomaly = meanAnomaly;
+        }
+
+        public static KeplerElements FromOrbitModule(OrbitModule module)
+        {
+            return FromTrueAnomaly(module.Eccentricity, module.SemiMajorAxis, module.Inclination, module.LongitudeOfAscendingNode, module.ArgumentOfPeriapsis, module.TrueAnomaly);
+        }
+
+        public static KeplerElements FromTrueAnomaly(float e, float a, float i, float longitudeOfAscendingNode, float argumentOfPeriapsis, float trueAnomaly)
+        {
+            var eccentricAnomaly = EccentricAnomalyFromTrueAnomaly(trueAnomaly, e);
+            var meanAnomaly = MeanAnomalyFromEccentricAnomaly(eccentricAnomaly, e);
+            return new KeplerElements(e, a, i, longitudeOfAscendingNode, argumentOfPeriapsis, trueAnomaly, eccentricAnomaly, meanAnomaly);    
+        }
+
+        public static KeplerElements FromMeanAnomaly(float e, float a, float i, float longitudeOfAscendingNode, float argumentOfPeriapsis, float meanAnomaly)
+        {
+            var trueAnomaly = TrueAnomalyFromMeanAnomaly(meanAnomaly, e);
+            var eccentricAnomaly = EccentricAnomalyFromTrueAnomaly(trueAnomaly, e);
+            return new KeplerElements(e, a, i, longitudeOfAscendingNode, argumentOfPeriapsis, trueAnomaly, eccentricAnomaly, meanAnomaly);
+        }
+
+        public static KeplerElements FromEccentricAnomaly(float e, float a, float i, float longitudeOfAscendingNode, float argumentOfPeriapsis, float eccentricAnomaly)
+        {
+            var trueAnomaly = TrueAnomalyFromEccentricAnomaly(eccentricAnomaly, e);
+            var meanAnomaly = MeanAnomalyFromEccentricAnomaly(eccentricAnomaly, e);
+            return new KeplerElements(e, a, i, longitudeOfAscendingNode, argumentOfPeriapsis, trueAnomaly, eccentricAnomaly, meanAnomaly);
+        }
+
+        private static float MeanAnomalyFromEccentricAnomaly(float eccentricAnomaly, float eccentricity)
+        {
+            return eccentricAnomaly - eccentricity * Mathf.Sin(eccentricAnomaly);
+        }
+
+        private static float TrueAnomalyFromEccentricAnomaly(float eccentricAnomaly, float eccentricity)
+        {
+            var a = Mathf.Cos(eccentricAnomaly) - eccentricity;
+            var h = 1 - eccentricity * Mathf.Cos(eccentricAnomaly);
+            var o = h * h - a * a;
+            return Mathf.Atan2(o, a);
+        }
+
+        private static float EccentricAnomalyFromTrueAnomaly(float trueAnomaly, float eccentricity)
+        {
+            var a = Mathf.Cos(trueAnomaly) + eccentricity;
+            var h = 1 + eccentricity * Mathf.Cos(trueAnomaly);
+            var o = h * h - a * a;
+            return Mathf.Atan2(o, a);
+        }
+
+        private static float TrueAnomalyFromMeanAnomaly(float meanAnomaly, float eccentricity)
+        {
+            // Fourier expansion
+            var term1 = meanAnomaly;
+            var term2 = (2 * eccentricity - eccentricity * eccentricity * eccentricity / 4f) * Mathf.Sin(meanAnomaly);
+            var term3 = (eccentricity * eccentricity * Mathf.Sin(2 * meanAnomaly) * 5f / 4f);
+            var term4 = (eccentricity * eccentricity * eccentricity * Mathf.Sin(3 * meanAnomaly) * 13f / 12f);
+            return term1 + term2 + term3 + term4;
+        }
+    }
+}

NewHorizons/OrbitalPhysics/OrbitalHelper.cs

@@ -14,83 +14,46 @@ namespace NewHorizons.OrbitalPhysics
         public enum FalloffType
         {
             inverseSquared,
-            linear
+            linear,
+            none
         }
 
-        public static CartesianStateVectors CartesianStateVectorsFromTrueAnomaly(float standardGraviationalParameter, float eccentricity, float semiMajorAxis, float inclination,
+        public static float GetOrbitalVelocity(float distance, Gravity gravity, KeplerElements kepler)
-            float longitudeOfAscendingNode, float argumentOfPeriapsis, float trueAnomaly, FalloffType falloffType)
         {
-            var nu = Mathf.Deg2Rad * trueAnomaly;
+            if (kepler.Eccentricity == 0) return GetCircularOrbitVelocity(distance, gravity, kepler);
-            var E = Mathf.Atan2(Mathf.Sqrt(1 - eccentricity * eccentricity) * Mathf.Sin(nu), (eccentricity + Mathf.Cos(nu)));
 
-            return CartesianStateVectorsFromOrbitalElements(standardGraviationalParameter, eccentricity, semiMajorAxis, inclination, longitudeOfAscendingNode, argumentOfPeriapsis, E, nu, falloffType);
+            if (gravity.Exponent == 2)
-        }
-
-        public static CartesianStateVectors CartesianStateVectorsFromEccentricAnomaly(float standardGraviationalParameter, float eccentricity, float semiMajorAxis, float inclination,
-            float longitudeOfAscendingNode, float argumentOfPeriapsis, float eccentricAnomaly, FalloffType falloffType)
-        {
-            var E = Mathf.Deg2Rad * eccentricAnomaly;
-            var nu = 2f * Mathf.Atan2(Mathf.Sqrt(1 + eccentricity) * Mathf.Sin(E)/2f, Mathf.Sqrt(1 - eccentricity) * Mathf.Cos(E) / 2f);
-
-            return CartesianStateVectorsFromOrbitalElements(standardGraviationalParameter, eccentricity, semiMajorAxis, inclination, longitudeOfAscendingNode, argumentOfPeriapsis, E, nu, falloffType);
-        }
-
-        private static CartesianStateVectors CartesianStateVectorsFromOrbitalElements(float standardGraviationalParameter, float eccentricity, float semiMajorAxis, float inclination,
-            float longitudeOfAscendingNode, float argumentOfPeriapsis, float E, float nu, FalloffType falloffType)
-        {
-            //Keplerian Orbit Elements −→ Cartesian State Vectors (Memorandum #1) Rene Schwarz
-
-            if (semiMajorAxis == 0) return new CartesianStateVectors();
-
-            // POS
-            var r = semiMajorAxis * (1 - eccentricity * Mathf.Cos(E));
-
-            Vector3 position = r * new Vector3(Mathf.Cos(nu), 0, Mathf.Sin(nu));
-
-            // VEL
-            var speed = Visviva(falloffType, standardGraviationalParameter, position.magnitude, semiMajorAxis, eccentricity);
-            Vector3 velocity = speed * (new Vector3(-Mathf.Sin(E), 0, Mathf.Sqrt(1 - (eccentricity * eccentricity)) * Mathf.Cos(E))).normalized;
-
-            Quaternion periapsisRot = Quaternion.AngleAxis(Mathf.Deg2Rad * argumentOfPeriapsis, Vector3.up);
-            var inclinationAxis = Quaternion.AngleAxis(Mathf.Repeat(Mathf.Deg2Rad * longitudeOfAscendingNode, 2f * Mathf.PI), Vector3.up) * Vector3.left;
-            Quaternion inclinationRot = Quaternion.AngleAxis(inclination, inclinationAxis);
-
-            position = periapsisRot * inclinationRot * position;
-            velocity = periapsisRot * inclinationRot * velocity;
-
-            return new CartesianStateVectors(position, velocity);
-        }
-
-        public static float Visviva(FalloffType falloffType, float standardGravitationalParameter, float dist, float semiMajorAxis, float eccentricity)
-        {
-            switch(falloffType)
             {
-                case FalloffType.inverseSquared:
+                return Mathf.Sqrt(GravityVolume.GRAVITATIONAL_CONSTANT * gravity.Mass * (2f / distance - 1f / kepler.SemiMajorAxis));
-                    return Mathf.Sqrt(standardGravitationalParameter * (2f / dist - 1f / semiMajorAxis));
-                case FalloffType.linear:
-                    if (eccentricity == 0f) return Mathf.Sqrt(standardGravitationalParameter);
-
-                    var ra = semiMajorAxis * (1 + eccentricity);
-                    var rp = semiMajorAxis * (1 - eccentricity);
-
-                    var kineticEneregyAtApoapsis = standardGravitationalParameter * Mathf.Log(ra / rp) * (rp * rp) / ((rp * rp) - (ra * ra));
-                    var gravitationalEnergy = standardGravitationalParameter * Mathf.Log(dist / ra);
-                    var v = Mathf.Sqrt(2 * (kineticEneregyAtApoapsis + gravitationalEnergy));
-
-                    return v;
             }
-            Logger.LogError($"Invalid falloffType {falloffType}");
+            if(gravity.Exponent == 1)
+            {
+                var mu = GravityVolume.GRAVITATIONAL_CONSTANT * gravity.Mass;
+                var rp2 = kepler.Periapsis * kepler.Periapsis;
+                var ra2 = kepler.Apoapsis * kepler.Apoapsis;
+                float term1 = 0;
+                if(kepler.Eccentricity < 1)
+                    term1 = mu * Mathf.Log(kepler.Periapsis / kepler.Apoapsis) * rp2 / (rp2 - ra2);
+                var term2 = mu * Mathf.Log(kepler.Apoapsis / distance);
+                Logger.Log($"{term1}, {term2}, {kepler.Periapsis} {kepler.Apoapsis}, {kepler.SemiMajorAxis}, {kepler.SemiMinorAxis}");
+                return Mathf.Sqrt(2 * (term1 + term2));
+            }
+            Logger.LogError($"Invalid exponent {gravity.Exponent}");
             return 0f;
         }
 
-        private static Vector3 RotateToOrbitalPlane(Vector3 vector, float longitudeOfAscendingNode, float argumentOfPeriapsis, float inclination)
+        public static float GetCircularOrbitVelocity(float distance, Gravity gravity, KeplerElements kepler)
         {
-            vector = Quaternion.AngleAxis(Mathf.Deg2Rad * argumentOfPeriapsis, Vector3.up) * vector;
+            if (gravity.Exponent == 2)
-
+            {
-            var inclinationAxis = Quaternion.AngleAxis(Mathf.Repeat(Mathf.Deg2Rad * longitudeOfAscendingNode, 2f * Mathf.PI), Vector3.up) * new Vector3(1, 0, 0);
+                return Mathf.Sqrt(GravityVolume.GRAVITATIONAL_CONSTANT * gravity.Mass / distance);
-            vector = Quaternion.AngleAxis(Mathf.Repeat(Mathf.Deg2Rad * inclination, 2f * Mathf.PI), inclinationAxis) * vector;
+            }
-
+            if(gravity.Exponent == 1)
-            return vector;
+            {
+                return Mathf.Sqrt(GravityVolume.GRAVITATIONAL_CONSTANT * gravity.Mass);
+            }
+            Logger.LogError($"Invalid exponent {gravity.Exponent}");
+            return 0f;
         }
     }
 }

NewHorizons/OrbitalPhysics/ParameterizedInitialMotion.cs

@@ -11,6 +11,7 @@ namespace NewHorizons.OrbitalPhysics
 {
     public class ParameterizedInitialMotion : InitialMotion
     {
+        /*
         private new void Awake()
         {
             _rotationAxis = base.transform.TransformDirection(_rotationAxis);
@@ -106,5 +107,6 @@ namespace NewHorizons.OrbitalPhysics
         private float _initAngularSpeed;
 
         private OWRigidbody _satelliteBody;
+        */
     }
 }

NewHorizons/OrbitalPhysics/ParameterizedOrbitLine.cs

@@ -12,7 +12,8 @@ using Logger = NewHorizons.Utility.Logger;
 namespace NewHorizons.OrbitalPhysics
 {
     public class ParameterizedOrbitLine : OrbitLine
-    {
+	{               
+		/*
 		protected override void InitializeLineRenderer()
 		{
 			base.GetComponent<LineRenderer>().positionCount = this._numVerts;
@@ -122,5 +123,6 @@ namespace NewHorizons.OrbitalPhysics
 		private InitialMotion _initialMotion;
 		private AstroObject _primary;
 		private OrbitalHelper.FalloffType _falloffType;
+		*/
 	}
 }

NewHorizons/Utility/MTuple.cs

@@ -1,15 +0,0 @@
-using System.Collections.Generic;
-using System.Linq;
-
-namespace NewHorizons.Utility
-{
-    public class MTuple
-    {
-        public MTuple(params object[] _items)
-        {
-            Items = _items.ToList();
-        }
-
-        public List<object> Items { get; }
-    }
-}

NewHorizons/Utility/NewHorizonExtensions.cs

@@ -1,6 +1,7 @@
 using NewHorizons.OrbitalPhysics;
 using System.Collections.Generic;
 using System.Reflection;
+using System.Text;
 using UnityEngine;
 
 namespace NewHorizons.Utility
@@ -19,9 +20,30 @@ namespace NewHorizons.Utility
 
         public static OrbitalHelper.FalloffType GetFalloffType(this GravityVolume gv)
         {
+            if (gv == null) return OrbitalHelper.FalloffType.none;
             var falloffTypeString = typeof(GravityVolume).GetField("_falloffType", BindingFlags.NonPublic | BindingFlags.Instance).GetValue(gv).ToString();
             var falloffType = falloffTypeString.Equals("linear") ? OrbitalHelper.FalloffType.linear : OrbitalHelper.FalloffType.inverseSquared;
             return falloffType;
         }
+
+        public static float GetFalloffExponent(this GravityVolume gv)
+        {
+            if (gv == null) return 0;
+            return (float)typeof(GravityVolume).GetField("_falloffExponent", BindingFlags.NonPublic | BindingFlags.Instance).GetValue(gv);
+        }
+
+        public static string ToCamelCase(this string str)
+        {
+            StringBuilder strBuilder = new StringBuilder(str);
+            strBuilder[0] = strBuilder[0].ToString().ToLower().ToCharArray()[0];
+            return strBuilder.ToString();
+        }
+
+        public static string ToTitleCase(this string str)
+        {
+            StringBuilder strBuilder = new StringBuilder(str);
+            strBuilder[0] = strBuilder[0].ToString().ToUpper().ToCharArray()[0];
+            return strBuilder.ToString();
+        }
     }
 }