DMeshSO now automatically switches to more complex view-mesh decomp if mesh is larger that 500k tris (maybe should be even smaller?)

Author: rms80

sceneObjects/DMeshSO.cs

@@ -31,8 +31,6 @@ public class DMeshSO : BaseSO, SpatialQueryableSO
                                                    // a background thread, to avoid making mesh copies. Functions that
                                                    // internally modify .mesh will lock this first.
 
-        IViewMeshManager viewMeshes;
-
         bool enable_spatial = true;
         DMeshAABBTree3 spatial;
 
@@ -49,16 +47,49 @@ public virtual DMeshSO Create(DMesh3 mesh, SOMaterial setMaterial)
 
             this.mesh = mesh;
 
-            //viewMeshes = new LinearDecompViewMeshManager(this);
-            viewMeshes = new TrivialViewMeshManager(this);
+
 
             on_mesh_changed();
-            viewMeshes.ValidateViewMeshes();
+            validate_view_meshes();
 
             return this;
         }
 
 
+        const int mesh_decomp_size_thresh = 500000;
+        IViewMeshManager view_meshes = null;
+        IViewMeshManager ViewMeshes {
+            get {
+                if ( view_meshes == null ) {
+                    if (Mesh.TriangleCount > mesh_decomp_size_thresh)
+                        view_meshes = new LinearDecompViewMeshManager(this) { MaxSubmeshSize = 128000 };
+                    else
+                        view_meshes = new TrivialViewMeshManager(this);
+                }
+                return view_meshes;
+            }
+        }
+        void release_view_meshes()
+        {
+            if (view_meshes != null) {
+                view_meshes.InvalidateViewMeshes();
+                view_meshes.Dispose();
+                view_meshes = null;
+            }
+        }
+        void validate_view_meshes()
+        {
+            // if view meshes are invalid, and mesh is too big, create piecewise decomp panager
+            if ( (view_meshes != null)
+                && (view_meshes is TrivialViewMeshManager)
+                && (view_meshes.AreMeshesValid == false) 
+                && (Mesh.TriangleCount > mesh_decomp_size_thresh) ) {
+                release_view_meshes();
+            }
+            ViewMeshes.ValidateViewMeshes();
+        }
+
+
 
         // To reduce memory usage, when we disconnect a DMeshSO we can
         // discard temporary data structures. Also, when we destroy it,
@@ -67,13 +98,13 @@ public virtual DMeshSO Create(DMesh3 mesh, SOMaterial setMaterial)
         override public void Connect(bool bRestore)
         {
             if ( bRestore ) {
-                viewMeshes.ValidateViewMeshes();
+                validate_view_meshes();
             }
         }
         override public void Disconnect(bool bDestroying)
         {
             this.spatial = null;
-            viewMeshes.InvalidateViewMeshes();
+            release_view_meshes();
             if ( bDestroying ) {
                 this.mesh = null;
             }
@@ -185,7 +216,7 @@ public void ReplaceMesh(DMesh3 newMesh, bool bTakeOwnership = true)
             }
 
             on_mesh_changed();
-            viewMeshes.ValidateViewMeshes();
+            validate_view_meshes();
             post_mesh_modified();
         }
 
@@ -262,9 +293,9 @@ public void UpdateVertices(DMesh3 sourceMesh, bool bNormals = true, bool bColors
 
         // fast update of view meshes for vertex deformations/changes
         void fast_mesh_update(bool bNormals, bool bColors) {
-            viewMeshes.FastUpdateVertices(bNormals, bColors);
+            ViewMeshes.FastUpdateVertices(bNormals, bColors);
             on_mesh_changed(true, false);
-            viewMeshes.ValidateViewMeshes();
+            validate_view_meshes();
         }
 
 
@@ -300,7 +331,7 @@ public void notify_mesh_edited(GeometryEditTypes editType)
                 fast_mesh_update(true, true);
             } else {
                 on_mesh_changed();
-                viewMeshes.ValidateViewMeshes();
+                validate_view_meshes();
             }
             post_mesh_modified();
         }
@@ -312,7 +343,7 @@ void on_mesh_changed(bool bInvalidateSpatial = true, bool bInvalidateDecomp = tr
 
             // discard existing mesh GOs
             if (bInvalidateDecomp) {
-                viewMeshes.InvalidateViewMeshes();
+                ViewMeshes.InvalidateViewMeshes();
             }
         }
 

util/ViewMeshManagers.cs

@@ -11,8 +11,10 @@ namespace f3
     /// The ViewMeshManager does this. This may involve multiple render meshes
     /// at the engine level.
     /// </summary>
-    public interface IViewMeshManager
+    public interface IViewMeshManager : IDisposable
     {
+        bool AreMeshesValid { get; }
+
         /// <summary>
         /// Generate new view meshes if they don't exist. Should not
         /// regenerate unless Invalidate() has been called.
@@ -54,6 +56,17 @@ public TrivialViewMeshManager(DMeshSO sourceSO)
             SourceSO = sourceSO;
         }
 
+        public void Dispose()
+        {
+            InvalidateViewMeshes();
+        }
+
+        //
+        // AAAHHH should be re-using these GOs !!
+        //
+
+
+        public bool AreMeshesValid { get { return decomp_valid; } }
 
         public virtual void ValidateViewMeshes()
         {
@@ -103,6 +116,8 @@ public class LinearDecompViewMeshManager : IViewMeshManager, IMeshComponentManag
     {
         public DMeshSO SourceSO;
 
+        public int MaxSubmeshSize = 64000;   // unity uint-mesh limit
+
         protected DMesh3 mesh {
             get { return SourceSO.Mesh; }
         }
@@ -123,13 +138,20 @@ public LinearDecompViewMeshManager(DMeshSO sourceSO)
             displayComponents = new List<DisplayMeshComponent>();
         }
 
+        public void Dispose()
+        {
+            InvalidateViewMeshes();
+        }
+
+        public bool AreMeshesValid { get { return decomp_valid; } }
 
         public virtual void ValidateViewMeshes()
         {
             if (decomp_valid)
                 return;
 
-            decomp = new MeshDecomposition(mesh, this);
+            decomp = new MeshDecomposition(mesh, this)
+                { MaxComponentSize = this.MaxSubmeshSize };
             decomp.BuildLinear();
             decomp = null;
 
@@ -157,7 +179,7 @@ public virtual void FastUpdateVertices(bool bNormals, bool bColors)
         public void AddComponent(MeshDecomposition.Component C)
         {
             fMesh submesh = new fMesh(C.triangles, mesh, C.source_vertices, true, true, true);
-            fMeshGameObject submesh_go = GameObjectFactory.CreateMeshGO("component", submesh, false);
+            fMeshGameObject submesh_go = GameObjectFactory.CreateMeshGO("component", submesh, true);
             submesh_go.SetMaterial(SourceSO.CurrentMaterial, true);
             submesh_go.SetLayer(SourceSO.RootGameObject.GetLayer());
             displayComponents.Add(new DisplayMeshComponent() {