[Core] Added IGuidAsset GuidHash property;

[Rendering] Add MeshRenderSystem ordering to optimize;

Author: LittleCodingFox

Engine/Core/Audio/AudioClip.cs

@@ -57,7 +57,21 @@ public sealed class AudioClip : IGuidAsset
 
     private string guid;
 
-    public string Guid { get => guid; set => guid = value; }
+    private int guidHash;
+
+    public int GuidHash => guidHash;
+
+    public string Guid
+    {
+        get => guid;
+        
+        set
+        {
+            guid = value;
+
+            guidHash = guid?.GetHashCode() ?? 0;
+        }
+    }
 
     /// <summary>
     /// Gets an internal audio stream for the audio.

Engine/Core/Entities/Prefab.cs

@@ -9,7 +9,22 @@ public class Prefab : IGuidAsset
 {
     internal SerializablePrefab data;
 
-    public string Guid { get; set; }
+    private int guidHash;
+    private string guid;
+
+    public int GuidHash => guidHash;
+
+    public string Guid
+    {
+        get => guid;
+
+        set
+        {
+            guid = value;
+
+            guidHash = guid?.GetHashCode() ?? 0;
+        }
+    }
 
     public static object Create(string guid)
     {

Engine/Core/Rendering/Animation/SkinnedAnimationStateMachine.cs

@@ -153,7 +153,22 @@ public class AnimationState
     /// </summary>
     public List<AnimationParameter> parameters = [];
 
-    public string Guid { get; set; }
+    private int guidHash;
+    private string guid;
+
+    public int GuidHash => guidHash;
+
+    public string Guid
+    {
+        get => guid;
+
+        set
+        {
+            guid = value;
+
+            guidHash = guid?.GetHashCode() ?? 0;
+        }
+    }
 
     public static object Create(string guid)
     {

Engine/Core/Rendering/Animation/SkinnedMeshRenderSystem.cs

@@ -151,7 +151,7 @@ public void Process((Entity, Transform, IComponent)[] entities, Camera activeCam
 
             Matrix4x4[] boneMatrices;
 
-            if (renderCache.TryGetValue(meshAsset.Guid.GetHashCode(), out var cache) == false)
+            if (renderCache.TryGetValue(meshAsset.GuidHash, out var cache) == false)
             {
                 boneMatrices = new Matrix4x4[meshAsset.BoneCount];
 
@@ -160,7 +160,7 @@ public void Process((Entity, Transform, IComponent)[] entities, Camera activeCam
                     boneMatrices = boneMatrices,
                 };
 
-                renderCache.Add(meshAsset.Guid.GetHashCode(), cache);
+                renderCache.Add(meshAsset.GuidHash, cache);
             }
             else
             {
@@ -235,14 +235,14 @@ public void Submit()
 
             for (var j = 0; j < renderer.mesh.submeshes.Count; j++)
             {
-                var assetGuid = meshAsset.Guid.GetHashCode();
+                var assetGuid = meshAsset.GuidHash;
 
                 var material = renderer.materials[j];
 
                 var useAnimator = animator != null && animator.evaluator != null;
 
                 var needsChange = assetGuid != lastMeshAsset ||
-                    material.Guid != (lastMaterial?.Guid ?? "") ||
+                    material.GuidHash != (lastMaterial?.GuidHash ?? 0) ||
                     lastAnimator != animator ||
                     lastLighting != renderer.lighting;
 

Engine/Core/Rendering/Lighting/LightSystem.cs

@@ -185,7 +185,7 @@ public void ApplyLightProperties(Vector3 position, Matrix4x4 transform, Material
             cachedLightSpotDirection[i] = forward.ToVector4();
         }
 
-        var key = material.shader.Guid.GetHashCode();
+        var key = material.shader.GuidHash;
 
         if(cachedMaterialInfo.TryGetValue(key, out var handles) == false)
         {

Engine/Core/Rendering/Material.cs

@@ -98,7 +98,6 @@ internal static Texture WhiteTexture
     }
 
     internal Shader shader;
-    internal string guid;
     internal MaterialMetadata metadata;
 
     internal Dictionary<int, ParameterInfo> parameters = [];
@@ -185,14 +184,21 @@ internal bgfx.StateFlags CullingFlag
         }
     }
 
-    /// <summary>
-    /// The asset's guid (if any)
-    /// </summary>
+    private int guidHash;
+    private string guid;
+
+    public int GuidHash => guidHash;
+
     public string Guid
     {
         get => guid;
 
-        set => guid = value;
+        set
+        {
+            guid = value;
+
+            guidHash = guid?.GetHashCode() ?? 0;
+        }
     }
 
     /// <summary>

Engine/Core/Rendering/Mesh/Mesh.cs

@@ -674,16 +674,21 @@ public int VertexCount
     /// </summary>
     public int IndexCount => indices?.Length ?? 0;
 
-    internal string guid;
+    private int guidHash;
+    private string guid;
+
+    public int GuidHash => guidHash;
 
-    /// <summary>
-    /// Asset GUID
-    /// </summary>
     public string Guid
     {
         get => guid;
 
-        set => guid = value;
+        set
+        {
+            guid = value;
+
+            guidHash = guid?.GetHashCode() ?? 0;
+        }
     }
 
     /// <summary>

Engine/Core/Rendering/Mesh/MeshAsset.cs

@@ -635,10 +635,22 @@ public class Animation
     /// </summary>
     public int BoneCount { get; internal set; }
 
-    /// <summary>
-    /// Asset GUID
-    /// </summary>
-    public string Guid { get; set; }
+    private int guidHash;
+    private string guid;
+
+    public int GuidHash => guidHash;
+
+    public string Guid
+    {
+        get => guid;
+
+        set
+        {
+            guid = value;
+
+            guidHash = guid?.GetHashCode() ?? 0;
+        }
+    }
 
     /// <summary>
     /// Attempts to get an animation by name