Model Hot-Reloading (#4304)

* Added a ModelReloader class that handles reloading the hierarchy of assets in the correct order. A ModelReloaderSystem that is used to make sure there is only one ModelReloader at a time for a given asset. Modified the Model, ModelLodAsset, and Buffer assets to not automatically reload, and instead handle reloads manually via AssetCatalog events. Modified the MeshLoader to kick off a reload via the ModelReloaderSystem whenever a model asset is added or changed. Signed-off-by: amzn-tommy <waltont@amazon.com> * Comment updates Signed-off-by: amzn-tommy <waltont@amazon.com> * Minor naming and comment updates based on PR feedback Signed-off-by: amzn-tommy <waltont@amazon.com> * Correcting previous commit. I flipped == to != when switching from count to find, when it should have stayed == Signed-off-by: amzn-tommy <waltont@amazon.com> * Updating RenderCommon header Signed-off-by: amzn-tommy <waltont@amazon.com> * Removing unneeded headers Signed-off-by: amzn-tommy <waltont@amazon.com> * Reverting RayTracingFeatureProcessor change following Doug's guidance. This logic was tricky to get right initially, and leads to TDR when incorrect, so leaving as is. Signed-off-by: amzn-tommy <waltont@amazon.com> * Removing a tab Signed-off-by: amzn-tommy <waltont@amazon.com> * Added missing #include for AssetId Signed-off-by: amzn-tommy <waltont@amazon.com> * Adding missing RTTI header Signed-off-by: amzn-tommy <waltont@amazon.com> * Include ModelAsset definition intead of forward declaring it to avoid a static assert on Linux Signed-off-by: amzn-tommy <waltont@amazon.com>
2021-10-05 09:59:13 -07:00
parent aef1f01de2
commit 256564a3e0
15 changed files with 532 additions and 8 deletions
@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) Contributors to the Open 3D Engine Project.
+ * For complete copyright and license terms please see the LICENSE at the root of this distribution.
+ *
+ * SPDX-License-Identifier: Apache-2.0 OR MIT
+ *
+ */
+
+#pragma once
+
+#include <Atom/Feature/Mesh/ModelReloaderSystemInterface.h>
+
+#include <AzCore/Asset/AssetCommon.h>
+#include <AzCore/RTTI/RTTI.h>
+#include <AzCore/std/containers/unordered_map.h>
+
+namespace AZ
+{
+    namespace Render
+    {
+        class ModelReloader;
+
+        using RemoveModelFromReloaderSystemEvent = Event<const Data::AssetId&>;
+        
+        class ModelReloaderSystem
+            : public ModelReloaderSystemInterface
+        {
+        public:
+            AZ_RTTI(Render::ModelReloaderSystem, "{8C85ECCD-B6C8-4949-B26C-9C4F1020F2B8}", Render::ModelReloaderSystemInterface);
+            
+            void ReloadModel(Data::Asset<RPI::ModelAsset> modelAsset, ModelReloadedEvent::Handler& onReloadedEventHandler) override;
+
+        private:
+            void RemoveReloader(const Data::AssetId& assetId);
+
+            // Keep track of all the pending reloads so there are no duplicates
+            AZStd::unordered_map<Data::AssetId, ModelReloader*> m_pendingReloads;
+            AZStd::mutex m_pendingReloadMutex;
+
+            RemoveModelFromReloaderSystemEvent::Handler m_removeModelHandler{
+                [&](const Data::AssetId& assetId)
+                {
+                    RemoveReloader(assetId);
+                } };
+
+            friend class ModelReloader;
+        };
+
+    } // namespace Render
+} // namespace AZ