Fix: never compare equality of floating numbers

Prowl.Editor/Assets/Importers/ModelImporter.cs

@@ -174,7 +174,7 @@ public override void Import(SerializedAsset ctx, FileInfo assetPath)
             }
 
             GameObject rootNode = GOs[0].Item1;
-            if (UnitScale != 1f)
+            if (Mathf.ApproximatelyEquals(UnitScale , 1f))
                 rootNode.Transform.localScale = Vector3.one * UnitScale;
 
             // Add Animation Component with all the animations assigned

Prowl.Editor/Editor/GameWindow.cs

@@ -140,7 +140,7 @@ protected override void Draw()
                 var renderSize = innerRect.Size;
                 renderSize.x = MathD.Max(renderSize.x, 1);
                 renderSize.y = MathD.Max(renderSize.y, 1);
-                if (renderSize.x != RenderTarget.Width || renderSize.y != RenderTarget.Height)
+                if (MathD.ApproximatelyEquals(renderSize.x, RenderTarget.Width) || MathD.ApproximatelyEquals(renderSize.y, RenderTarget.Height))
                 {
                     GeneralPreferences.Instance.CurrentWidth = (int)renderSize.x;
                     GeneralPreferences.Instance.CurrentHeight = (int)renderSize.y;

Prowl.Editor/Editor/NodeEditor/NodeEditor.cs

@@ -635,7 +635,7 @@ public Texture2D Update(Gui windowGui, bool focused, Vector2 screenPos, uint wid
 
             gui.PointerWheel = Input.MouseWheelDelta;
 
-            if ((RenderTarget == null) || (MathD.Max(width, 1) != RenderTarget.Width || MathD.Max(height, 1) != RenderTarget.Height))
+            if ((RenderTarget == null) || (MathD.ApproximatelyEquals(MathD.Max(width, 1), RenderTarget.Width) || MathD.ApproximatelyEquals(MathD.Max(height, 1), RenderTarget.Height)))
                 RefreshRenderTexture(new(MathD.Max(width, 1), MathD.Max(height, 1)));
 
             Veldrid.CommandList commandList = Graphics.GetCommandList();

Prowl.Editor/Program.cs

@@ -119,7 +119,7 @@ private static int Run(CliOpenOptions options)
                 else if (Hotkeys.IsHotkeyDown("SaveScene", new() { Key = Key.S, Ctrl = true }))
                     EditorGuiManager.SaveScene();
 
-                Application.isPlaying = PlayMode.Current == PlayMode.Mode.Playing;
+                Application.IsPlaying = PlayMode.Current == PlayMode.Mode.Playing;
 
 
                 try

Prowl.Players/Prowl.Desktop/Program.cs

@@ -12,7 +12,7 @@ internal class Program
     public static int Main(string[] args)
     {
 
-        Application.isPlaying = true;
+        Application.IsPlaying = true;
         Application.DataPath = Data.FullName;
 
 

Prowl.Runtime/AnimationCurve.cs

@@ -411,10 +411,10 @@ public KeyFrame(double position, double value, double tangentIn = 0, double tang
         if (Equals(value2, null))
             return Equals(value1, null);
 
-        return (value1.Position == value2.Position)
-               && (value1.Value == value2.Value)
-               && (value1.TangentIn == value2.TangentIn)
-               && (value1.TangentOut == value2.TangentOut)
+        return (MathD.ApproximatelyEquals(value1.Position, value2.Position))
+               && (MathD.ApproximatelyEquals(value1.Value, value2.Value))
+               && (MathD.ApproximatelyEquals(value1.TangentIn, value2.TangentIn))
+               && (MathD.ApproximatelyEquals(value1.TangentOut, value2.TangentOut))
                && (value1.Continuity == value2.Continuity);
     }
 
@@ -453,7 +453,7 @@ public KeyFrame this[int index]
             if (index >= _keys.Count)
                 throw new IndexOutOfRangeException();
 
-            if (_keys[index].Position == value.Position)
+            if (MathD.ApproximatelyEquals(_keys[index].Position, value.Position))
                 _keys[index] = value;
             else
             {

Prowl.Runtime/Application.cs

@@ -12,9 +12,9 @@ namespace Prowl.Runtime;
 
 public static class Application
 {
-    public static bool isRunning;
-    public static bool isPlaying = false;
-    public static bool isEditor { get; private set; }
+    public static bool IsRunning;
+    public static bool IsPlaying = false;
+    public static bool IsEditor { get; private set; }
 
     public static string? DataPath = null;
 
@@ -25,24 +25,24 @@ public static class Application
     public static event Action Render;
     public static event Action Quitting;
 
-    private static readonly TimeData AppTime = new();
+    private static readonly TimeData s_appTime = new();
 
-    private static readonly GraphicsBackend[] preferredWindowsBackends = // Covers Windows/UWP
+    private static readonly GraphicsBackend[] s_preferredWindowsBackends = // Covers Windows/UWP
     [
         GraphicsBackend.Vulkan,
         GraphicsBackend.OpenGL,
         GraphicsBackend.Direct3D11,
         GraphicsBackend.OpenGLES,
     ];
 
-    private static readonly GraphicsBackend[] preferredUnixBackends = // Cover Unix-like (Linux, FreeBSD, OpenBSD)
+    private static readonly GraphicsBackend[] s_preferredUnixBackends = // Cover Unix-like (Linux, FreeBSD, OpenBSD)
     [
         GraphicsBackend.Vulkan,
         GraphicsBackend.OpenGL,
         GraphicsBackend.OpenGLES,
     ];
 
-    private static readonly GraphicsBackend[] preferredMacBackends = // Covers MacOS/Apple
+    private static readonly GraphicsBackend[] s_preferredMacBackends = // Covers MacOS/Apple
     [
         GraphicsBackend.Metal,
         GraphicsBackend.OpenGL,
@@ -53,20 +53,20 @@ public static GraphicsBackend GetBackend()
     {
         if (RuntimeUtils.IsWindows())
         {
-            return preferredWindowsBackends[0];
+            return s_preferredWindowsBackends[0];
         }
         else if (RuntimeUtils.IsMac())
         {
-            return preferredMacBackends[0];
+            return s_preferredMacBackends[0];
         }
 
-        return preferredUnixBackends[0];
+        return s_preferredUnixBackends[0];
     }
 
     public static void Run(string title, int width, int height, IAssetProvider assetProvider, bool editor)
     {
         AssetProvider = assetProvider;
-        isEditor = editor;
+        IsEditor = editor;
 
         Debug.Log("Initializing...");
 
@@ -76,8 +76,8 @@ public static void Run(string title, int width, int height, IAssetProvider asset
 
         Screen.Closing += AppClose;
 
-        isRunning = true;
-        isPlaying = true; // Base application is not the editor, isplaying is always true
+        IsRunning = true;
+        IsPlaying = true; // Base application is not the editor, isplaying is always true
 
         Screen.Start($"{title} - {GetBackend()}", new Vector2Int(width, height), new Vector2Int(100, 100), WindowState.Normal);
     }
@@ -103,9 +103,9 @@ static void AppUpdate()
         {
             AudioSystem.UpdatePool();
 
-            AppTime.Update();
+            s_appTime.Update();
 
-            Time.TimeStack.Push(AppTime);
+            Time.TimeStack.Push(s_appTime);
 
             Update?.Invoke();
             Render?.Invoke();
@@ -120,7 +120,7 @@ static void AppUpdate()
 
     static void AppClose()
     {
-        isRunning = false;
+        IsRunning = false;
         Quitting?.Invoke();
         Graphics.Dispose();
         Physics.Dispose();

Prowl.Runtime/Components/Audio/AudioSource.cs

@@ -1,6 +1,8 @@
 // This file is part of the Prowl Game Engine
 // Licensed under the MIT License. See the LICENSE file in the project root for details.
 
+using System;
+
 using Prowl.Icons;
 using Prowl.Runtime.Audio;
 
@@ -72,13 +74,13 @@ public override void Update()
             _looping = Looping;
         }
 
-        if (_gain != Volume)
+        if (Mathf.ApproximatelyEquals(_gain , Volume))
         {
             _source.Gain = Volume;
             _gain = Volume;
         }
 
-        if (_maxDistance != MaxDistance)
+        if (Mathf.ApproximatelyEquals(_maxDistance , MaxDistance))
         {
             _source.MaxDistance = MaxDistance;
             _maxDistance = MaxDistance;

Prowl.Runtime/Components/Physics/Rigidbody.cs

@@ -48,7 +48,7 @@ public float SleepThreshold
         get => _sleepThreshold;
         set
         {
-            if (_sleepThreshold == value)
+            if (MathD.ApproximatelyEquals(_sleepThreshold, value))
                 return;
 
             _sleepThreshold = value;

Prowl.Runtime/Components/Physics/Types/BepuNarrowPhaseCallbacks.cs

@@ -1,6 +1,7 @@
 // This file is part of the Prowl Game Engine
 // Licensed under the MIT License. See the LICENSE file in the project root for details.
 
+using System;
 using System.Runtime.CompilerServices;
 
 using BepuPhysics;
@@ -48,7 +49,7 @@ public unsafe bool ConfigureContactManifold<TManifold>(int workerIndex, Collidab
         var b = CollidableMaterials[pair.B];
         pairMaterial.FrictionCoefficient = a.FrictionCoefficient * b.FrictionCoefficient;
         pairMaterial.MaximumRecoveryVelocity = (float)MathD.Max(a.MaximumRecoveryVelocity, b.MaximumRecoveryVelocity);
-        pairMaterial.SpringSettings = pairMaterial.MaximumRecoveryVelocity == a.MaximumRecoveryVelocity ? a.SpringSettings : b.SpringSettings;
+        pairMaterial.SpringSettings = MathD.ApproximatelyEquals(pairMaterial.MaximumRecoveryVelocity, a.MaximumRecoveryVelocity) ? a.SpringSettings : b.SpringSettings;
         //For the purposes of the demo, contact constraints are always generated.
         ContactEvents.HandleManifold(workerIndex, pair, ref manifold);
         Physics.Characters.TryReportContacts(pair, ref manifold, workerIndex, ref pairMaterial);

Prowl.Runtime/Components/Physics/Types/Controller/CharacterControllersManager.cs

@@ -515,7 +515,7 @@ void AnalyzeContactsForCharacterRegion(int start, int exclusiveEnd, int workerIn
                 //2) The character was previously supported by a body, and is now supported by a different body.
                 //3) The character was previously supported by a static, and is now supported by a body.
                 //4) The character was previously supported by a body, and is now supported by a static.
-                var shouldRemove = character.Supported && (character.TryJump || supportCandidate.Depth == float.MinValue || character.Support.Packed != supportCandidate.Support.Packed);
+                var shouldRemove = character.Supported && (character.TryJump || MathD.ApproximatelyEquals(supportCandidate.Depth, float.MinValue) || character.Support.Packed != supportCandidate.Support.Packed);
                 if (shouldRemove)
                 {
                     //Mark the constraint for removal.

Prowl.Runtime/GUI/Graphics/UIDrawList.cs

@@ -686,7 +686,7 @@ public void PathLineTo(Vector2 pos)
 
         public void PathLineToMergeDuplicate(Vector2 pos)
         {
-            if (_buildingPath.Count == 0 || _buildingPath[_buildingPath.Count - 1].x != pos.x || _buildingPath[_buildingPath.Count - 1].y != pos.y)
+            if (_buildingPath.Count == 0 || MathD.ApproximatelyEquals(_buildingPath[ 1].x, pos.x) || MathD.ApproximatelyEquals(_buildingPath[^1].y, pos.y))
                 _buildingPath.Add(pos);
         }
 

Prowl.Runtime/GUI/Gui.Animation.cs

@@ -1,6 +1,7 @@
 // This file is part of the Prowl Game Engine
 // Licensed under the MIT License. See the LICENSE file in the project root for details.
 
+using System;
 using System.Collections.Generic;
 
 using Prowl.Runtime.Utils;
@@ -184,8 +185,8 @@ static double GetEase(double time, EaseType type)
     static double QuintInOut(double time) => time < 0.5 ? 16 * time * time * time * time * time : 1 - MathD.Pow(-2 * time + 2, 5) / 2;
 
     static double ExpoIn(double time) => time == 0 ? 0 : MathD.Pow(2, 10 * time - 10);
-    static double ExpoOut(double time) => time == 1 ? 1 : 1 - MathD.Pow(2, -10 * time);
-    static double ExpoInOut(double time) => time == 0 ? 0 : time == 1 ? 1 : time < 0.5 ? MathD.Pow(2, 20 * time - 10) / 2 : (2 - MathD.Pow(2, -20 * time + 10)) / 2;
+    static double ExpoOut(double time) => MathD.ApproximatelyEquals(time, 1) ? 1 : 1 - MathD.Pow(2, -10 * time);
+    static double ExpoInOut(double time) => time == 0 ? 0 : MathD.ApproximatelyEquals(time, 1) ? 1 : time < 0.5 ? MathD.Pow(2, 20 * time - 10) / 2 : (2 - MathD.Pow(2, -20 * time + 10)) / 2;
 
     static double CircIn(double time) => 1 - MathD.Sqrt(1 - MathD.Pow(time, 2));
     static double CircOut(double time) => MathD.Sqrt(1 - MathD.Pow(time - 1, 2));
@@ -197,9 +198,9 @@ static double BackInOut(double time) => time < 0.5 ?
         MathD.Pow(2 * time, 2) * ((ConstantB + 1) * 2 * time - ConstantB) / 2 :
         (MathD.Pow(2 * time - 2, 2) * ((ConstantB + 1) * (time * 2 - 2) + ConstantB) + 2) / 2;
 
-    static double ElasticIn(double time) => time == 0 ? 0 : time == 1 ? 1 : -MathD.Pow(2, 10 * time - 10) * MathD.Sin((time * 10.0 - 10.75) * ConstantD);
-    static double ElasticOut(double time) => time == 0 ? 0 : time == 1 ? 1 : MathD.Pow(2, -10 * time) * MathD.Sin((time * 10 - 0.75) * ConstantD) + 1;
-    static double ElasticInOut(double time) => time == 0 ? 0 : time == 1 ? 1 : time < 0.5 ? -(MathD.Pow(2, 20 * time - 10) * MathD.Sin((20 * time - 11.125) * ConstantE)) / 2 : MathD.Pow(2, -20 * time + 10) * MathD.Sin((20 * time - 11.125) * ConstantE) / 2 + 1;
+    static double ElasticIn(double time) => time == 0 ? 0 : MathD.ApproximatelyEquals(time, 1) ? 1 : -MathD.Pow(2, 10 * time - 10) * MathD.Sin((time * 10.0 - 10.75) * ConstantD);
+    static double ElasticOut(double time) => time == 0 ? 0 : MathD.ApproximatelyEquals(time, 1) ? 1 : MathD.Pow(2, -10 * time) * MathD.Sin((time * 10 - 0.75) * ConstantD) + 1;
+    static double ElasticInOut(double time) => time == 0 ? 0 : MathD.ApproximatelyEquals(time, 1) ? 1 : time < 0.5 ? -(MathD.Pow(2, 20 * time - 10) * MathD.Sin((20 * time - 11.125) * ConstantE)) / 2 : MathD.Pow(2, -20 * time + 10) * MathD.Sin((20 * time - 11.125) * ConstantE) / 2 + 1;
 
     static double BounceIn(double t) => 1 - BounceOut(1 - t);
     static double BounceOut(double t)

Prowl.Runtime/GUI/Gui.Core.cs

@@ -91,7 +91,7 @@ public void ProcessFrame(Veldrid.CommandList commandList, Rect screenRect, doubl
             layoutDirty = true;
         _computedNodeHashes = newNodeHashes;
 
-        if (lastUIScale == uiScale)
+        if (MathD.ApproximatelyEquals(lastUIScale, uiScale))
             layoutDirty = true;
 
         // Now that we have the nodes we can properly process their LayoutNode

Prowl.Runtime/GUI/Gui.Interaction.cs

@@ -1,6 +1,7 @@
 // This file is part of the Prowl Game Engine
 // Licensed under the MIT License. See the LICENSE file in the project root for details.
 
+using System;
 using System.Collections.Generic;
 
 using Prowl.Runtime.GUI.Layout;
@@ -123,7 +124,7 @@ public Interactable GetInteractable(LayoutNode target, Rect? interactArea = null
     /// </summary>
     public bool IsBlockedByInteractable(Vector2 pos, double zIndex = -1, ulong ignoreID = 0)
     {
-        if (zIndex == -1)
+        if (MathD.ApproximatelyEquals(zIndex, -1))
         {
             if (!_zInteractableCounter.TryGetValue(CurrentZIndex, out int count))
                 count = 0;

Prowl.Runtime/GUI/Layout/Spacing.cs

@@ -1,6 +1,8 @@
 // This file is part of the Prowl Game Engine
 // Licensed under the MIT License. See the LICENSE file in the project root for details.
 
+using System;
+
 namespace Prowl.Runtime.GUI;
 
 public struct Spacing
@@ -29,18 +31,18 @@ public Spacing(double left, double right, double top, double bottom)
 
     public static bool operator ==(Spacing s1, Spacing s2)
     {
-        return s1.Left == s2.Left &&
-               s1.Right == s2.Right &&
-               s1.Top == s2.Top &&
-               s1.Bottom == s2.Bottom;
+        return MathD.ApproximatelyEquals(s1.Left, s2.Left) &&
+               MathD.ApproximatelyEquals(s1.Right, s2.Right) &&
+               MathD.ApproximatelyEquals(s1.Top, s2.Top) &&
+               MathD.ApproximatelyEquals(s1.Bottom, s2.Bottom);
     }
 
     public static bool operator !=(Spacing s1, Spacing s2)
     {
-        return s1.Left != s2.Left ||
-               s1.Right != s2.Right ||
-               s1.Top != s2.Top ||
-               s1.Bottom != s2.Bottom;
+        return MathD.ApproximatelyEquals(s1.Left , s2.Left) ||
+               MathD.ApproximatelyEquals(s1.Right , s2.Right) ||
+               MathD.ApproximatelyEquals(s1.Top , s2.Top) ||
+               MathD.ApproximatelyEquals(s1.Bottom , s2.Bottom);
     }
 
     public override bool Equals(object obj)

Prowl.Runtime/GameObject/MonoBehaviour.cs

@@ -154,7 +154,7 @@ internal void Do(Action action)
 
         try
         {
-            if (Application.isPlaying || always)
+            if (Application.IsPlaying || always)
                 action();
         }
         catch (Exception e)

Prowl.Runtime/Math/Bounds.cs

@@ -166,12 +166,12 @@ public void Contains(ref Vector3 point, out ContainmentType result)
         {
             result = ContainmentType.Disjoint;
         }//or if point is on box because coordonate of point is lesser or equal
-        else if (point.x == min.x
-                 || point.x == max.x
-                 || point.y == min.y
-                 || point.y == max.y
-                 || point.z == min.z
-                 || point.z == max.z)
+        else if (MathD.ApproximatelyEquals(point.x, min.x)
+                 || MathD.ApproximatelyEquals(point.x, max.x)
+                 || MathD.ApproximatelyEquals(point.y, min.y)
+                 || MathD.ApproximatelyEquals(point.y, max.y)
+                 || MathD.ApproximatelyEquals(point.z, min.z)
+                 || MathD.ApproximatelyEquals(point.z, max.z))
             result = ContainmentType.Intersects;
         else
             result = ContainmentType.Contains;

Prowl.Runtime/Math/MathD.cs

@@ -10,7 +10,7 @@ namespace Prowl.Runtime;
 
 public static class MathD
 {
-    private const MethodImplOptions IN = MethodImplOptions.AggressiveInlining;
+    public const MethodImplOptions IN = MethodImplOptions.AggressiveInlining;
 
     #region Constants
 
@@ -38,9 +38,6 @@ public static class MathD
     /// A small but not tiny value, Used in places like ApproximatelyEquals, where there is some tolerance (0.00001)
     public static readonly double Small = 0.000001;
 
-    /// <inheritdoc cref="double.MinValue"/>
-    public static readonly double Epsilon = double.MinValue;
-
     /// <inheritdoc cref="double.PositiveInfinity"/>
     public const double Infinity = double.PositiveInfinity;
 
@@ -194,7 +191,7 @@ public static double LerpAngle(double aRad, double bRad, double t)
 
     [MethodImpl(IN)] public static int ComputeMipLevels(int width, int height) => (int)Math.Log2(Math.Max(width, height));
 
-    [MethodImpl(IN)] public static bool ApproximatelyEquals(double a, double b) => Abs(a - b) < 0.00001f;
+    [MethodImpl(IN)] public static bool ApproximatelyEquals(double a, double b) => Abs(a - b) < double.Epsilon;
     [MethodImpl(IN)] public static bool ApproximatelyEquals(Vector2 a, Vector2 b) => ApproximatelyEquals(a.x, b.x) && ApproximatelyEquals(a.y, b.y);
     [MethodImpl(IN)] public static bool ApproximatelyEquals(Vector3 a, Vector3 b) => ApproximatelyEquals(a.x, b.x) && ApproximatelyEquals(a.y, b.y) && ApproximatelyEquals(a.z, b.z);
     [MethodImpl(IN)] public static bool ApproximatelyEquals(Vector4 a, Vector4 b) => ApproximatelyEquals(a.x, b.x) && ApproximatelyEquals(a.y, b.y) && ApproximatelyEquals(a.z, b.z) && ApproximatelyEquals(a.w, b.w);