Centralize simulation balancing values

README.md

@@ -4,7 +4,7 @@ C# WinUI 3 + Win2D level editor for the deterministic grid simulation described
 
 ## Projects
 
-- `src/ReactorMaintenance.Simulation`: UI-independent level model, editor operations, forecasts, simulation turns, and JSON serialization.
+- `src/ReactorMaintenance.Simulation`: UI-independent level model, editor operations, forecasts, simulation turns, JSON serialization, and `Balancing.cs` tuning values.
 - `src/ReactorMaintenance.Win2D`: Win2D editor app for painting square grid cells, loading/saving levels, advancing simulation turns, and activating the reactor.
 - `tests/ReactorMaintenance.Simulation.Tests`: unit tests for deterministic simulation behavior.
 

src/ReactorMaintenance.Simulation/Balancing.cs

@@ -0,0 +1,74 @@
+namespace ReactorMaintenance.Simulation;
+
+public static class Balancing
+{
+    public static int MinHazardValue => 0;
+    public static int MaxHazardValue => 10;
+    public static int DefaultHazardStability => 10;
+    public static int DefaultCellIntegrity => 10;
+    public static int DefaultActionsPerTurn => 3;
+    public static int DefaultCoreHeat => 5;
+    public static int DefaultFacilityStability => 10;
+    public static int DefaultPower => 5;
+    public static int DefaultCooling => 0;
+    public static int FirstGridCoordinate => 0;
+    public static int NeighborDistance => 1;
+    public static int CurrentForecastTurn => 0;
+    public static int MinimumLevelSize => 4;
+    public static int DefaultLevelWidth => 16;
+    public static int DefaultLevelHeight => 12;
+    public static int DefaultRobotCoordinate => 1;
+    public static int DefaultPipeFlow => 4;
+    public static int DefaultPipePressure => 4;
+    public static int DefaultPressurePipeFlow => 5;
+    public static int DefaultPressurePipePressure => 6;
+    public static int DefaultEditedPipeIntegrity => 8;
+    public static int MinimumLeakRate => 1;
+    public static int DamagedPipeIntegrity => 4;
+    public static int RepairedLeakRate => 0;
+    public static int RepairedElectricalCharge => 0;
+    public static int HeatToolIncrease => 2;
+    public static int FireToolMinimumHeat => 7;
+    public static int FireToolMinimumSmoke => 3;
+    public static int MaxForecastStepCount => 12;
+    public static int TurnIncrement => 1;
+    public static int OverpressureThreshold => 7;
+    public static int HeatIntegrityDamageThreshold => 10;
+    public static int PipeFireIntegrityDamage => 1;
+    public static int FireStabilityDamage => 1;
+    public static int BurstLeakRate => 3;
+    public static int BrokenPipeFlow => 0;
+    public static int ElectrifiedCoolantPoolingThreshold => 3;
+    public static int ElectricalChargeIncrease => 2;
+    public static int FuelVaporFireThreshold => 4;
+    public static int LiquidFuelFireThreshold => 6;
+    public static int HeatIgnitionThreshold => 8;
+    public static int ElectricalIgnitionThreshold => 4;
+    public static int FireHeatIncrease => 2;
+    public static int FireSmokeIncrease => 2;
+    public static int FireLiquidFuelConsumption => 1;
+    public static int FireFuelVaporConsumption => 1;
+    public static int SmokeDecay => 1;
+    public static int PressurizedFuelLeakPressureThreshold => 7;
+    public static int PassiveFuelVaporHeatOffset => 3;
+    public static int PassiveFuelVaporDivisor => 3;
+    public static int MinimumCoolantHeatReduction => 1;
+    public static int CoolantHeatReductionDivisor => 2;
+    public static int CoolantSteamHeatThreshold => 7;
+    public static int CoolantSteamSmokeIncrease => 2;
+    public static int PressureLeakSmokeThreshold => 8;
+    public static int PressureLeakSmokeIncrease => 1;
+    public static int GeneratorHeatIncrease => 1;
+    public static int CoolingPumpHeatReduction => 2;
+    public static int ReactorHeatIncrease => 1;
+    public static int SmokeSpreadThreshold => 6;
+    public static int SmokeSpreadIncrease => 1;
+    public static int CriticalCellStabilityThreshold => 3;
+    public static int MeltdownCoreHeatThreshold => 10;
+    public static int StabilityCollapseThreshold => 0;
+    public static int GeneratorPowerOutput => 3;
+    public static int CoolingPumpOutput => 3;
+    public static int ReactorReadyPowerThreshold => 3;
+    public static int ReactorReadyCoolingThreshold => 3;
+    public static int ReactorReadyCoreHeatThreshold => 8;
+}

src/ReactorMaintenance.Simulation/CellIntegrityEffect.cs

@@ -7,13 +7,13 @@ public sealed class CellIntegrityEffect : ISimulationEffect
         var integrity = cell.Integrity;
         var hazards = cell.Hazards;
 
-        if (cell is { HasPipe: true, Pressure: > 7 })
+        if (cell is { HasPipe: true } && cell.Pressure > Balancing.OverpressureThreshold)
-            integrity -= cell.Pressure - 7;
+            integrity -= cell.Pressure - Balancing.OverpressureThreshold;
 
-        if (hazards.Heat >= 10 || hazards.Fire)
+        if (hazards.Heat >= Balancing.HeatIntegrityDamageThreshold || hazards.Fire)
         {
-            integrity -= cell.HasPipe ? 1 : 0;
+            integrity -= cell.HasPipe ? Balancing.PipeFireIntegrityDamage : Balancing.MinHazardValue;
-            hazards = hazards with { Stability = hazards.Stability - 1 };
+            hazards = hazards with { Stability = hazards.Stability - Balancing.FireStabilityDamage };
         }
 
         cell = cell with {
@@ -21,12 +21,12 @@ public sealed class CellIntegrityEffect : ISimulationEffect
             Hazards = hazards.Clamp()
         };
 
-        if (integrity > 0 || !cell.HasPipe)
+        if (integrity > Balancing.MinHazardValue || !cell.HasPipe)
             return cell;
 
         return cell with {
-            LeakRate = Math.Max(cell.LeakRate, 3),
+            LeakRate = Math.Max(cell.LeakRate, Balancing.BurstLeakRate),
-            Flow = 0,
+            Flow = Balancing.BrokenPipeFlow,
             PipeOpen = false
         };
     }

src/ReactorMaintenance.Simulation/FireAndElectricalHazardEffect.cs

@@ -5,23 +5,23 @@ public sealed class FireAndElectricalHazardEffect : ISimulationEffect
     public CellState Apply(CellState cell)
     {
         var hazards = cell.Hazards;
-        if (hazards.CoolantPooling >= 3 && cell.Powered)
+        if (hazards.CoolantPooling >= Balancing.ElectrifiedCoolantPoolingThreshold && cell.Powered)
-            hazards = hazards with { ElectricalCharge = hazards.ElectricalCharge + 2 };
+            hazards = hazards with { ElectricalCharge = hazards.ElectricalCharge + Balancing.ElectricalChargeIncrease };
 
-        var hasFuel = hazards.FuelVapor >= 4 || hazards.LiquidFuel >= 6;
+        var hasFuel = hazards.FuelVapor >= Balancing.FuelVaporFireThreshold || hazards.LiquidFuel >= Balancing.LiquidFuelFireThreshold;
-        var hasIgnition = hazards.Heat >= 8 || hazards.ElectricalCharge >= 4 || cell is { Kind: ECellKind.Generator, Powered: true };
+        var hasIgnition = hazards.Heat >= Balancing.HeatIgnitionThreshold || hazards.ElectricalCharge >= Balancing.ElectricalIgnitionThreshold || cell is { Kind: ECellKind.Generator, Powered: true };
         if ((hasFuel && hasIgnition) || hazards.Fire)
         {
             hazards = hazards with {
                 Fire = hasFuel || hazards.Fire,
-                Heat = hazards.Heat + 2,
+                Heat = hazards.Heat + Balancing.FireHeatIncrease,
-                Smoke = hazards.Smoke + 2,
+                Smoke = hazards.Smoke + Balancing.FireSmokeIncrease,
-                LiquidFuel = Math.Max(0, hazards.LiquidFuel - 1),
+                LiquidFuel = Math.Max(Balancing.MinHazardValue, hazards.LiquidFuel - Balancing.FireLiquidFuelConsumption),
-                FuelVapor = Math.Max(0, hazards.FuelVapor - 1)
+                FuelVapor = Math.Max(Balancing.MinHazardValue, hazards.FuelVapor - Balancing.FireFuelVaporConsumption)
             };
         }
-        else if (hazards.Smoke > 0)
+        else if (hazards.Smoke > Balancing.MinHazardValue)
-            hazards = hazards with { Smoke = hazards.Smoke - 1 };
+            hazards = hazards with { Smoke = hazards.Smoke - Balancing.SmokeDecay };
 
         return cell with { Hazards = hazards.Clamp() };
     }

src/ReactorMaintenance.Simulation/IgnitionHazard.cs

@@ -4,14 +4,14 @@ public sealed class IgnitionHazard : Hazard
 {
     public override IEnumerable<Forecast> Predict(LevelState level, int turns)
     {
-        for (var y = 0; y < level.Height; y++)
+        for (var y = Balancing.FirstGridCoordinate; y < level.Height; y++)
         {
-            for (var x = 0; x < level.Width; x++)
+            for (var x = Balancing.FirstGridCoordinate; x < level.Width; x++)
             {
                 var position = new GridPosition(x, y);
                 var cell = level.GetCell(position);
                 if (cell.Hazards.Fire)
-                    yield return new(EFailureKind.Ignition, position, turns, turns == 1 ? $"FUEL IGNITION PREDICTED AT {x},{y} NEXT TURN" : $"FUEL IGNITION PREDICTED AT {x},{y} IN {turns} TURNS");
+                    yield return new(EFailureKind.Ignition, position, turns, turns == Balancing.TurnIncrement ? $"FUEL IGNITION PREDICTED AT {x},{y} NEXT TURN" : $"FUEL IGNITION PREDICTED AT {x},{y} IN {turns} TURNS");
             }
         }
     }

src/ReactorMaintenance.Simulation/LevelEditor.cs

@@ -58,43 +58,43 @@ public static class LevelEditor
             },
             EEditorTool.CoolantPipe => cell with {
                 Pipe = EPipeMedium.Coolant,
-                Flow = 4,
+                Flow = Balancing.DefaultPipeFlow,
-                Pressure = 4,
+                Pressure = Balancing.DefaultPipePressure,
-                Integrity = Math.Max(cell.Integrity, 8),
+                Integrity = Math.Max(cell.Integrity, Balancing.DefaultEditedPipeIntegrity),
                 PipeOpen = true
             },
             EEditorTool.FuelPipe => cell with {
                 Pipe = EPipeMedium.Fuel,
-                Flow = 4,
+                Flow = Balancing.DefaultPipeFlow,
-                Pressure = 4,
+                Pressure = Balancing.DefaultPipePressure,
-                Integrity = Math.Max(cell.Integrity, 8),
+                Integrity = Math.Max(cell.Integrity, Balancing.DefaultEditedPipeIntegrity),
                 PipeOpen = true
             },
             EEditorTool.PressurePipe => cell with {
                 Pipe = EPipeMedium.Pressure,
-                Flow = 5,
+                Flow = Balancing.DefaultPressurePipeFlow,
-                Pressure = 6,
+                Pressure = Balancing.DefaultPressurePipePressure,
-                Integrity = Math.Max(cell.Integrity, 8),
+                Integrity = Math.Max(cell.Integrity, Balancing.DefaultEditedPipeIntegrity),
                 PipeOpen = true
             },
             EEditorTool.Leak => cell with {
-                LeakRate = Math.Max(1, cell.LeakRate),
+                LeakRate = Math.Max(Balancing.MinimumLeakRate, cell.LeakRate),
-                Integrity = Math.Min(cell.Integrity, 4)
+                Integrity = Math.Min(cell.Integrity, Balancing.DamagedPipeIntegrity)
             },
             EEditorTool.Repair => cell with {
-                LeakRate = 0,
+                LeakRate = Balancing.RepairedLeakRate,
-                Integrity = 10,
+                Integrity = Balancing.DefaultCellIntegrity,
                 Hazards = cell.Hazards with {
                     Fire = false,
-                    ElectricalCharge = 0
+                    ElectricalCharge = Balancing.RepairedElectricalCharge
                 }
             },
-            EEditorTool.Heat => cell with { Hazards = cell.Hazards with { Heat = Rules.Clamp(cell.Hazards.Heat + 2) } },
+            EEditorTool.Heat => cell with { Hazards = cell.Hazards with { Heat = Rules.Clamp(cell.Hazards.Heat + Balancing.HeatToolIncrease) } },
             EEditorTool.Fire => cell with {
                 Hazards = cell.Hazards with {
                     Fire = !cell.Hazards.Fire,
-                    Heat = Math.Max(cell.Hazards.Heat, 7),
+                    Heat = Math.Max(cell.Hazards.Heat, Balancing.FireToolMinimumHeat),
-                    Smoke = Math.Max(cell.Hazards.Smoke, 3)
+                    Smoke = Math.Max(cell.Hazards.Smoke, Balancing.FireToolMinimumSmoke)
                 }
             },
             _ => cell

src/ReactorMaintenance.Simulation/MachineEffect.cs

@@ -5,9 +5,9 @@ public sealed class MachineEffect : ISimulationEffect
     public CellState Apply(CellState cell)
     {
         var hazards = cell.Kind switch {
-            ECellKind.Generator when cell.Powered => cell.Hazards with { Heat = cell.Hazards.Heat + 1 },
+            ECellKind.Generator when cell.Powered => cell.Hazards with { Heat = cell.Hazards.Heat + Balancing.GeneratorHeatIncrease },
-            ECellKind.CoolingPump when cell.Powered => cell.Hazards with { Heat = cell.Hazards.Heat - 2 },
+            ECellKind.CoolingPump when cell.Powered => cell.Hazards with { Heat = cell.Hazards.Heat - Balancing.CoolingPumpHeatReduction },
-            ECellKind.Reactor => cell.Hazards with { Heat = cell.Hazards.Heat + 1 },
+            ECellKind.Reactor => cell.Hazards with { Heat = cell.Hazards.Heat + Balancing.ReactorHeatIncrease },
             _ => cell.Hazards
         };
 

src/ReactorMaintenance.Simulation/Models.cs

@@ -34,10 +34,10 @@ public sealed record GridPosition(int X, int Y)
 {
     public IEnumerable<GridPosition> Neighbors()
     {
-        yield return new(X - 1, Y);
+        yield return new(X - Balancing.NeighborDistance, Y);
-        yield return new(X + 1, Y);
+        yield return new(X + Balancing.NeighborDistance, Y);
-        yield return new(X, Y - 1);
+        yield return new(X, Y - Balancing.NeighborDistance);
-        yield return new(X, Y + 1);
+        yield return new(X, Y + Balancing.NeighborDistance);
     }
 }
 
@@ -62,7 +62,7 @@ public sealed record HazardState
     public int LiquidFuel { get; init; }
     public int CoolantPooling { get; init; }
     public int ElectricalCharge { get; init; }
-    public int Stability { get; init; } = 10;
+    public int Stability { get; init; } = Balancing.DefaultHazardStability;
     public bool Fire { get; init; }
 }
 
@@ -72,7 +72,7 @@ public sealed record CellState
     public EPipeMedium Pipe { get; init; }
     public int Flow { get; init; }
     public int Pressure { get; init; }
-    public int Integrity { get; init; } = 10;
+    public int Integrity { get; init; } = Balancing.DefaultCellIntegrity;
     public int LeakRate { get; init; }
     public bool PipeOpen { get; init; } = true;
     public bool Powered { get; init; }
@@ -85,11 +85,11 @@ public sealed record CellState
 public sealed record GlobalState
 {
     public int Turn { get; init; }
-    public int ActionsPerTurn { get; init; } = 3;
+    public int ActionsPerTurn { get; init; } = Balancing.DefaultActionsPerTurn;
-    public int CoreHeat { get; init; } = 5;
+    public int CoreHeat { get; init; } = Balancing.DefaultCoreHeat;
-    public int FacilityStability { get; init; } = 10;
+    public int FacilityStability { get; init; } = Balancing.DefaultFacilityStability;
-    public int Power { get; init; } = 5;
+    public int Power { get; init; } = Balancing.DefaultPower;
-    public int Cooling { get; init; } = 0;
+    public int Cooling { get; init; } = Balancing.DefaultCooling;
     public bool ReactorActivated { get; init; }
     public bool Lost { get; init; }
     public string Status { get; init; } = "STABILIZE SYSTEMS";
@@ -101,15 +101,15 @@ public sealed record LevelState
 {
     public static LevelState Create(string name, int width, int height)
     {
-        if (width < 4 || height < 4)
+        if (width < Balancing.MinimumLevelSize || height < Balancing.MinimumLevelSize)
-            throw new ArgumentOutOfRangeException(nameof(width), "Levels must be at least 4x4.");
+            throw new ArgumentOutOfRangeException(nameof(width), $"Levels must be at least {Balancing.MinimumLevelSize}x{Balancing.MinimumLevelSize}.");
 
         var cells = CreateCells(width, height);
-        for (var y = 0; y < height; y++)
+        for (var y = Balancing.FirstGridCoordinate; y < height; y++)
         {
-            for (var x = 0; x < width; x++)
+            for (var x = Balancing.FirstGridCoordinate; x < width; x++)
             {
-                if (x == 0 || y == 0 || x == width - 1 || y == height - 1)
+                if (x == Balancing.FirstGridCoordinate || y == Balancing.FirstGridCoordinate || x == width - Balancing.NeighborDistance || y == height - Balancing.NeighborDistance)
                     cells[y * width + x] = cells[y * width + x] with { Kind = ECellKind.Wall };
             }
         }
@@ -119,7 +119,7 @@ public sealed record LevelState
             Width = width,
             Height = height,
             Cells = cells,
-            Robot = new(1, 1)
+            Robot = new(Balancing.DefaultRobotCoordinate, Balancing.DefaultRobotCoordinate)
         };
     }
 
@@ -139,7 +139,7 @@ public sealed record LevelState
 
     public bool InBounds(GridPosition position)
     {
-        return position.X >= 0 && position.Y >= 0 && position.X < Width && position.Y < Height;
+        return position.X >= Balancing.FirstGridCoordinate && position.Y >= Balancing.FirstGridCoordinate && position.X < Width && position.Y < Height;
     }
 
     public int Index(GridPosition position)
@@ -155,14 +155,14 @@ public sealed record LevelState
 
     private static CellState[] CreateCells(int width, int height)
     {
-        return Enumerable.Range(0, width * height).Select(_ => new CellState()).ToArray();
+        return Enumerable.Range(Balancing.FirstGridCoordinate, width * height).Select(_ => new CellState()).ToArray();
     }
 
     public string Name { get; init; } = "New Reactor";
-    public int Width { get; init; } = 16;
+    public int Width { get; init; } = Balancing.DefaultLevelWidth;
-    public int Height { get; init; } = 12;
+    public int Height { get; init; } = Balancing.DefaultLevelHeight;
-    public CellState[] Cells { get; init; } = CreateCells(16, 12);
+    public CellState[] Cells { get; init; } = CreateCells(Balancing.DefaultLevelWidth, Balancing.DefaultLevelHeight);
-    public GridPosition Robot { get; init; } = new(1, 1);
+    public GridPosition Robot { get; init; } = new(Balancing.DefaultRobotCoordinate, Balancing.DefaultRobotCoordinate);
     public GlobalState Global { get; init; } = new();
     public IReadOnlyList<Forecast> Forecasts { get; init; } = Array.Empty<Forecast>();
 }
@@ -171,6 +171,6 @@ internal static class Rules
 {
     public static int Clamp(int value)
     {
-        return Math.Clamp(value, 0, 10);
+        return Math.Clamp(value, Balancing.MinHazardValue, Balancing.MaxHazardValue);
     }
 }

src/ReactorMaintenance.Simulation/PipeBurstHazard.cs

@@ -4,13 +4,13 @@ public sealed class PipeBurstHazard : Hazard
 {
     public override IEnumerable<Forecast> Predict(LevelState level, int turns)
     {
-        for (var y = 0; y < level.Height; y++)
+        for (var y = Balancing.FirstGridCoordinate; y < level.Height; y++)
         {
-            for (var x = 0; x < level.Width; x++)
+            for (var x = Balancing.FirstGridCoordinate; x < level.Width; x++)
             {
                 var position = new GridPosition(x, y);
                 var cell = level.GetCell(position);
-                if (cell is { HasPipe: true, PipeOpen: false, Flow: 0, LeakRate: >= 3 })
+                if (cell is { HasPipe: true, PipeOpen: false } && cell.Flow == Balancing.BrokenPipeFlow && cell.LeakRate >= Balancing.BurstLeakRate)
                     yield return new(EFailureKind.PipeBurst, position, turns, $"PIPE BURST PREDICTED AT {x},{y} IN {turns} TURNS");
             }
         }

src/ReactorMaintenance.Simulation/PipeLeakEffect.cs

@@ -4,20 +4,20 @@ public sealed class PipeLeakEffect : ISimulationEffect
 {
     public CellState Apply(CellState cell)
     {
-        if (!cell.HasPipe || cell.LeakRate <= 0)
+        if (!cell.HasPipe || cell.LeakRate <= Balancing.MinHazardValue)
             return cell;
 
         var hazards = cell.Pipe switch {
             EPipeMedium.Fuel => cell.Hazards with {
                 LiquidFuel = cell.Hazards.LiquidFuel + cell.LeakRate,
-                FuelVapor = cell.Hazards.FuelVapor + (cell.Pressure >= 7 ? cell.LeakRate : Math.Max(0, cell.Hazards.Heat - 3) / 3)
+                FuelVapor = cell.Hazards.FuelVapor + (cell.Pressure >= Balancing.PressurizedFuelLeakPressureThreshold ? cell.LeakRate : Math.Max(Balancing.MinHazardValue, cell.Hazards.Heat - Balancing.PassiveFuelVaporHeatOffset) / Balancing.PassiveFuelVaporDivisor)
             },
             EPipeMedium.Coolant => cell.Hazards with {
                 CoolantPooling = cell.Hazards.CoolantPooling + cell.LeakRate,
-                Heat = cell.Hazards.Heat - Math.Max(1, cell.LeakRate / 2),
+                Heat = cell.Hazards.Heat - Math.Max(Balancing.MinimumCoolantHeatReduction, cell.LeakRate / Balancing.CoolantHeatReductionDivisor),
-                Smoke = cell.Hazards.Smoke + (cell.Hazards.Heat >= 7 ? 2 : 0)
+                Smoke = cell.Hazards.Smoke + (cell.Hazards.Heat >= Balancing.CoolantSteamHeatThreshold ? Balancing.CoolantSteamSmokeIncrease : Balancing.MinHazardValue)
             },
-            EPipeMedium.Pressure => cell.Hazards with { Smoke = cell.Hazards.Smoke + (cell.Pressure >= 8 ? 1 : 0) },
+            EPipeMedium.Pressure => cell.Hazards with { Smoke = cell.Hazards.Smoke + (cell.Pressure >= Balancing.PressureLeakSmokeThreshold ? Balancing.PressureLeakSmokeIncrease : Balancing.MinHazardValue) },
             _ => cell.Hazards
         };
 

src/ReactorMaintenance.Simulation/SimulationEngine.cs

@@ -23,14 +23,14 @@ public sealed class SimulationEngine(IEnumerable<ISimulationEffect> effects, IEn
         var seen = new HashSet<ForecastKey>();
         var forecastLevel = level with { Cells = level.Cells.ToArray(), Forecasts = Array.Empty<Forecast>() };
         if (forecastLevel.Global.Lost)
-            AddHazardForecasts(forecasts, seen, forecastLevel, 0);
+            AddHazardForecasts(forecasts, seen, forecastLevel, Balancing.CurrentForecastTurn);
 
-        AddReactorReadyForecast(forecasts, seen, forecastLevel, 0);
+        AddReactorReadyForecast(forecasts, seen, forecastLevel, Balancing.CurrentForecastTurn);
 
         if (IsReactorReady(forecastLevel) || forecastLevel.Global.Lost || forecastLevel.Global.ReactorActivated)
             return forecasts.OrderBy(f => f.Turns).ThenBy(f => f.Message).ToArray();
 
-        for (var step = 1; step <= c_MaxForecastStepCount; step++)
+        for (var step = Balancing.TurnIncrement; step <= Balancing.MaxForecastStepCount; step++)
         {
             forecastLevel = AdvanceTurn(forecastLevel, false);
             AddHazardForecasts(forecasts, seen, forecastLevel, step);
@@ -60,9 +60,9 @@ public sealed class SimulationEngine(IEnumerable<ISimulationEffect> effects, IEn
     {
         var cells = level.Cells.ToArray();
 
-        for (var y = 0; y < level.Height; y++)
+        for (var y = Balancing.FirstGridCoordinate; y < level.Height; y++)
         {
-            for (var x = 0; x < level.Width; x++)
+            for (var x = Balancing.FirstGridCoordinate; x < level.Width; x++)
             {
                 var position = new GridPosition(x, y);
                 var index = level.Index(position);
@@ -84,7 +84,7 @@ public sealed class SimulationEngine(IEnumerable<ISimulationEffect> effects, IEn
         var global = UpdateGlobal(level, cells);
         var next = level with {
             Cells = cells,
-            Global = global with { Turn = level.Global.Turn + 1 }
+            Global = global with { Turn = level.Global.Turn + Balancing.TurnIncrement }
         };
 
         return updateForecasts ? next with { Forecasts = Forecast(next) } : next;
@@ -116,14 +116,14 @@ public sealed class SimulationEngine(IEnumerable<ISimulationEffect> effects, IEn
         var reactorHeat = cells.Where(c => c.Kind == ECellKind.Reactor).Select(c => c.Hazards.Heat).DefaultIfEmpty(level.Global.CoreHeat).Max();
         var poweredGenerators = cells.Count(c => c is { Kind: ECellKind.Generator, Powered: true, Hazards.Fire: false });
         var poweredPumps = cells.Count(c => c is { Kind: ECellKind.CoolingPump, Powered: true, Hazards.Fire: false });
-        var damagedCriticalCells = cells.Count(c => c.Kind is ECellKind.Reactor or ECellKind.Generator or ECellKind.CoolingPump && c.Hazards.Stability <= 3);
+        var damagedCriticalCells = cells.Count(c => c.Kind is ECellKind.Reactor or ECellKind.Generator or ECellKind.CoolingPump && c.Hazards.Stability <= Balancing.CriticalCellStabilityThreshold);
         var stability = Rules.Clamp(level.Global.FacilityStability - damagedCriticalCells);
-        var lost = reactorHeat >= 10 || stability <= 0;
+        var lost = reactorHeat >= Balancing.MeltdownCoreHeatThreshold || stability <= Balancing.StabilityCollapseThreshold;
-        var status = lost ? reactorHeat >= 10 ? "CORE MELTDOWN" : "FACILITY STABILITY COLLAPSE" : "STABILIZE SYSTEMS";
+        var status = lost ? reactorHeat >= Balancing.MeltdownCoreHeatThreshold ? "CORE MELTDOWN" : "FACILITY STABILITY COLLAPSE" : "STABILIZE SYSTEMS";
         var global = level.Global with {
             CoreHeat = Rules.Clamp(reactorHeat - poweredPumps),
-            Power = Rules.Clamp(poweredGenerators * 3),
+            Power = Rules.Clamp(poweredGenerators * Balancing.GeneratorPowerOutput),
-            Cooling = Rules.Clamp(poweredPumps * 3),
+            Cooling = Rules.Clamp(poweredPumps * Balancing.CoolingPumpOutput),
             FacilityStability = stability,
             Lost = lost,
             Status = status
@@ -135,15 +135,13 @@ public sealed class SimulationEngine(IEnumerable<ISimulationEffect> effects, IEn
     private static bool IsReactorReady(LevelState level)
     {
         var hasReactor = level.Cells.Any(c => c.Kind == ECellKind.Reactor);
-        var hasStablePower = level.Global.Power >= 3 || level.Cells.Any(c => c is { Kind: ECellKind.Generator, Powered: true, Hazards.Fire: false });
+        var hasStablePower = level.Global.Power >= Balancing.ReactorReadyPowerThreshold || level.Cells.Any(c => c is { Kind: ECellKind.Generator, Powered: true, Hazards.Fire: false });
-        var hasCooling = level.Global.Cooling >= 3 || level.Cells.Any(c => c is { Kind: ECellKind.CoolingPump, Powered: true, Hazards.Fire: false });
+        var hasCooling = level.Global.Cooling >= Balancing.ReactorReadyCoolingThreshold || level.Cells.Any(c => c is { Kind: ECellKind.CoolingPump, Powered: true, Hazards.Fire: false });
-        var reactorStable = level.Global.CoreHeat < 8;
+        var reactorStable = level.Global.CoreHeat < Balancing.ReactorReadyCoreHeatThreshold;
         return hasReactor && hasStablePower && hasCooling && reactorStable && !level.Global.Lost;
     }
 
-    private const int c_MaxForecastStepCount = 12;
     private readonly IReadOnlyList<IAreaSimulationEffect> m_AreaEffects = areaEffects.ToArray();
-
     private readonly IReadOnlyList<ISimulationEffect> m_Effects = effects.ToArray();
     private readonly IReadOnlyList<Hazard> m_Hazards = hazards.ToArray();
 }

src/ReactorMaintenance.Simulation/SmokeSpreadEffect.cs

@@ -5,13 +5,13 @@ public sealed class SmokeSpreadEffect : IAreaSimulationEffect
     public CellState[] Apply(LevelState level, CellState[] cells)
     {
         var next = cells.ToArray();
-        for (var y = 0; y < level.Height; y++)
+        for (var y = Balancing.FirstGridCoordinate; y < level.Height; y++)
         {
-            for (var x = 0; x < level.Width; x++)
+            for (var x = Balancing.FirstGridCoordinate; x < level.Width; x++)
             {
                 var position = new GridPosition(x, y);
                 var cell = cells[level.Index(position)];
-                if (cell.Hazards.Smoke < 6)
+                if (cell.Hazards.Smoke < Balancing.SmokeSpreadThreshold)
                     continue;
 
                 SpreadToNeighbors(level, next, position);
@@ -29,7 +29,7 @@ public sealed class SmokeSpreadEffect : IAreaSimulationEffect
             if (!neighborCell.IsWalkable || neighborCell.DoorLocked)
                 continue;
 
-            next[level.Index(neighbor)] = neighborCell with { Hazards = neighborCell.Hazards with { Smoke = Rules.Clamp(neighborCell.Hazards.Smoke + 1) } };
+            next[level.Index(neighbor)] = neighborCell with { Hazards = neighborCell.Hazards with { Smoke = Rules.Clamp(neighborCell.Hazards.Smoke + Balancing.SmokeSpreadIncrease) } };
         }
     }
 }

tests/ReactorMaintenance.Simulation.Tests/SimulationEngineTests.cs

@@ -9,9 +9,9 @@ public sealed class SimulationEngineTests
                               .SetCell(new(2, 2), new() {
                                   Kind = ECellKind.Generator,
                                   Pipe = EPipeMedium.Fuel,
-                                  LeakRate = 4,
+                                  LeakRate = Balancing.FuelVaporFireThreshold,
-                                  Pressure = 8,
+                                  Pressure = Balancing.PressurizedFuelLeakPressureThreshold + Balancing.NeighborDistance,
-                                  Integrity = 8,
+                                  Integrity = Balancing.DefaultEditedPipeIntegrity,
                                   Powered = true
                               });
 
@@ -26,13 +26,13 @@ public sealed class SimulationEngineTests
         var level = LevelState.Create("Wet cable", 6, 6)
                               .SetCell(new(3, 3), new() {
                                   Pipe = EPipeMedium.Coolant,
-                                  LeakRate = 3,
+                                  LeakRate = Balancing.ElectrifiedCoolantPoolingThreshold,
                                   Powered = true
                               });
 
         var next = m_Engine.AdvanceTurn(level);
 
-        Assert.True(next.GetCell(new(3, 3)).Hazards.ElectricalCharge >= 2);
+        Assert.True(next.GetCell(new(3, 3)).Hazards.ElectricalCharge >= Balancing.ElectricalChargeIncrease);
     }
 
     [Fact]
@@ -42,7 +42,7 @@ public sealed class SimulationEngineTests
                               .SetCell(new(2, 2), new() {
                                   Hazards = new() {
                                       Fire = true,
-                                      Smoke = 6
+                                      Smoke = Balancing.SmokeSpreadThreshold
                                   }
                               });
 
@@ -99,8 +99,8 @@ public sealed class SimulationEngineTests
 
         var forecasts = engine.Forecast(level);
 
-        Assert.Equal(12, forecasts.Count);
+        Assert.Equal(Balancing.MaxForecastStepCount, forecasts.Count);
-        Assert.Equal(12, forecasts.Max(forecast => forecast.Turns));
+        Assert.Equal(Balancing.MaxForecastStepCount, forecasts.Max(forecast => forecast.Turns));
     }
 
     [Fact]
@@ -109,7 +109,7 @@ public sealed class SimulationEngineTests
         var level = LevelState.Create("Meltdown", 6, 6)
                               .SetCell(new(2, 2), new() {
                                   Kind = ECellKind.Reactor,
-                                  Hazards = new() { Heat = 9 }
+                                  Hazards = new() { Heat = Balancing.MeltdownCoreHeatThreshold - Balancing.ReactorHeatIncrease }
                               });
 
         var forecasts = m_Engine.Forecast(level);
@@ -122,7 +122,7 @@ public sealed class SimulationEngineTests
     {
         var level = LevelState.Create("Lost", 6, 6) with {
             Global = new() {
-                CoreHeat = 10,
+                CoreHeat = Balancing.MeltdownCoreHeatThreshold,
                 Lost = true,
                 Status = "CORE MELTDOWN"
             }
@@ -139,9 +139,9 @@ public sealed class SimulationEngineTests
         var level = LevelState.Create("Collapse", 6, 6)
                               .SetCell(new(2, 2), new() {
                                   Kind = ECellKind.Generator,
-                                  Hazards = new() { Stability = 3 }
+                                  Hazards = new() { Stability = Balancing.CriticalCellStabilityThreshold }
                               }) with {
-            Global = new() { FacilityStability = 1 }
+            Global = new() { FacilityStability = Balancing.FireStabilityDamage }
         };
 
         var forecasts = m_Engine.Forecast(level);