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 +1,38 @@
+/*
+ * 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
+ *
+ */
+
+#include <Source/Mesh/ModelReloaderSystem.h>
+#include <Source/Mesh/ModelReloader.h>
+#include <AzCore/std/parallel/scoped_lock.h>
+
+namespace AZ
+{
+    namespace Render
+    {
+        void ModelReloaderSystem::ReloadModel(Data::Asset<RPI::ModelAsset> modelAsset, ModelReloadedEvent::Handler& onReloadedEventHandler)
+        {
+            AZStd::scoped_lock lock(m_pendingReloadMutex);
+            if (m_pendingReloads.find(modelAsset.GetId()) == m_pendingReloads.end())
+            {
+                ModelReloader* reloader = new ModelReloader(modelAsset, m_removeModelHandler);
+                m_pendingReloads[modelAsset.GetId()] = reloader;
+            }
+
+            m_pendingReloads[modelAsset.GetId()]->ConnectOnReloadedEventHandler(onReloadedEventHandler);
+        }
+
+        void ModelReloaderSystem::RemoveReloader(const Data::AssetId& assetId)
+        {
+            AZStd::scoped_lock lock(m_pendingReloadMutex);
+            // We don't delete the ModelReloader here, because its in the middle of signaling this RemoveReloader event.
+            // We only remove it from the pending reloads here.
+            // The ModelReloader will delete itself after it finishes firing this event.
+            m_pendingReloads.erase(assetId);
+        }
+    } // namespace Render
+} // namespace AZ