Add more dynamic update code to level mesh

src/common/rendering/hwrenderer/data/hw_levelmesh.h

@@ -77,6 +77,7 @@ public:
 		info.Vertices = &Mesh.Vertices[info.VertexStart];
 		info.UniformIndexes = &Mesh.UniformIndexes[info.VertexStart];
 		info.Indexes = &Mesh.Indexes[info.IndexStart];
+		// To do: mark range as dirty
 		return info;
 	}
 
@@ -89,6 +90,7 @@ public:
 		Mesh.Materials.Resize(info.Start + count);
 		info.Uniforms = &Mesh.Uniforms[info.Start];
 		info.Materials = &Mesh.Materials[info.Start];
+		// To do: mark range as dirty
 		return info;
 	}
 
@@ -96,10 +98,19 @@ public:
 	{
 		for (int i = 0; i < indexCount; i++)
 			Mesh.Indexes[indexStart + i] = 0;
+		// To do: add to a free list
+		// To do: mark range as dirty
 	}
 
 	void FreeUniforms(int start, int count)
 	{
+		// To do: add to a free list
+	}
+
+	void FreeSurface(unsigned int surfaceIndex)
+	{
+		// To do: remove the surface from the surface tile, if attached
+		// To do: add to a free list
 	}
 
 	struct
@@ -121,7 +132,7 @@ public:
 		TArray<int> SurfaceIndexes;
 		int DynamicIndexStart = 0;
 
-		// Above data must not be resized beyond these limits as that's the size of the GPU buffers)
+		// Above data must not be resized beyond these limits as that's the size of the GPU buffers
 		int MaxVertices = 0;
 		int MaxIndexes = 0;
 		int MaxSurfaces = 0;

src/common/rendering/hwrenderer/data/hw_levelmeshsurface.h

@@ -24,8 +24,6 @@ struct LevelMeshSurface
 	FVector4 Plane = FVector4(0.0f, 0.0f, 1.0f, 0.0f);
 	int LightmapTileIndex = -1;
 
-	bool AlwaysUpdate = false;
-
 	FGameTexture* Texture = nullptr;
 	float Alpha = 1.0;
 	

src/common/rendering/hwrenderer/data/hw_lightmaptile.h

@@ -54,6 +54,8 @@ struct LightmapTile
 	// True if the tile needs to be rendered into the lightmap texture before it can be used
 	bool NeedsUpdate = true;
 
+	bool AlwaysUpdate = false;
+
 	FVector2 ToUV(const FVector3& vert) const
 	{
 		FVector3 localPos = vert - Transform.TranslateWorldToLocal;