Improve Cloth usage

Source/Editor/CustomEditors/Dedicated/MeshReferenceEditor.cs

@@ -225,8 +225,15 @@ namespace FlaxEditor.CustomEditors.Dedicated
             }
             _actor = actor;
 
-            var showActorPicker = actor == null || ParentEditor.Values.All(x => x is not Cloth);
-            if (showActorPicker)
+            if (ParentEditor.Values.Any(x => x is Cloth))
+            {
+                // Cloth always picks the parent model mesh
+                if (actor == null)
+                {
+                    layout.Label("Cloth needs to be added as a child to model actor.");
+                }
+            }
+            else
             {
                 // Actor reference picker
                 _actorPicker = layout.Custom<FlaxObjectRefPickerControl>();
@@ -242,7 +249,10 @@ namespace FlaxEditor.CustomEditors.Dedicated
                 {
                     var model = staticModel.Model;
                     if (model == null || model.WaitForLoaded())
+                    {
+                        layout.Label("No model.");
                         return;
+                    }
                     var materials = model.MaterialSlots;
                     var lods = model.LODs;
                     meshNames = new string[lods.Length][];
@@ -267,7 +277,10 @@ namespace FlaxEditor.CustomEditors.Dedicated
                 {
                     var skinnedModel = animatedModel.SkinnedModel;
                     if (skinnedModel == null || skinnedModel.WaitForLoaded())
+                    {
+                        layout.Label("No model.");
                         return;
+                    }
                     var materials = skinnedModel.MaterialSlots;
                     var lods = skinnedModel.LODs;
                     meshNames = new string[lods.Length][];

Source/Editor/Tools/ClothPainting.cs

@@ -225,6 +225,7 @@ namespace FlaxEngine.Tools
             var cloth = _cloth;
             if (cloth == null)
                 return;
+            var hasPaintInput = Owner.IsLeftMouseButtonDown && !Owner.IsAltKeyDown;
 
             // Perform detailed tracing to find cursor location for the brush
             var ray = Owner.MouseRay;
@@ -240,7 +241,7 @@ namespace FlaxEngine.Tools
                 // Cursor hit other object or nothing
                 PaintEnd();
 
-                if (Owner.IsLeftMouseButtonDown)
+                if (hasPaintInput)
                 {
                     // Select something else
                     var view = new Ray(Owner.ViewPosition, Owner.ViewDirection);
@@ -253,7 +254,7 @@ namespace FlaxEngine.Tools
             }
 
             // Handle painting
-            if (Owner.IsLeftMouseButtonDown)
+            if (hasPaintInput)
                 PaintStart();
             else
                 PaintEnd();

Source/Engine/Physics/Actors/Cloth.h

@@ -232,13 +232,13 @@ private:
 
 public:
     /// <summary>
-    /// Gets the mesh to use for the cloth simulation (single mesh from specific LOD).
+    /// Gets the mesh to use for the cloth simulation (single mesh from specific LOD). Always from the parent static or animated model actor.
     /// </summary>
     API_PROPERTY(Attributes="EditorOrder(0), EditorDisplay(\"Cloth\")")
     ModelInstanceActor::MeshReference GetMesh() const;
 
     /// <summary>
-    /// Sets the mesh to use for the cloth simulation (single mesh from specific LOD).
+    /// Sets the mesh to use for the cloth simulation (single mesh from specific LOD). Always from the parent static or animated model actor.
     /// </summary>
     API_PROPERTY() void SetMesh(const ModelInstanceActor::MeshReference& value);