171 lines
3.8 KiB
C++
171 lines
3.8 KiB
C++
// Copyright (c) 2012-2021 Wojciech Figat. All rights reserved.
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#include "NavMesh.h"
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#include "NavMeshRuntime.h"
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#include "Engine/Level/Scene/Scene.h"
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#include "Engine/Serialization/Serialization.h"
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#if COMPILE_WITH_ASSETS_IMPORTER
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#include "Engine/Core/Log.h"
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#include "Engine/ContentImporters/AssetsImportingManager.h"
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#include "Engine/Serialization/MemoryWriteStream.h"
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#if USE_EDITOR
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#include "Editor/Editor.h"
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#endif
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#endif
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NavMesh::NavMesh(const SpawnParams& params)
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: Actor(params)
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, IsDataDirty(false)
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{
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DataAsset.Loaded.Bind<NavMesh, &NavMesh::OnDataAssetLoaded>(this);
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}
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void NavMesh::SaveNavMesh()
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{
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#if COMPILE_WITH_ASSETS_IMPORTER
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// Skip if scene is missing
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const auto scene = GetScene();
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if (!scene)
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return;
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#if USE_EDITOR
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// Skip if game is running in editor (eg. game scripts update dynamic navmesh)
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if (Editor::IsPlayMode)
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return;
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#endif
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// Clear flag
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IsDataDirty = false;
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// Check if has no navmesh data generated (someone could just remove navmesh volumes or generate for empty scene)
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if (Data.Tiles.IsEmpty())
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{
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DataAsset = nullptr;
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return;
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}
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// Prepare
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Guid assetId = DataAsset.GetID();
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if (!assetId.IsValid())
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assetId = Guid::New();
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const String assetPath = scene->GetDataFolderPath() / TEXT("NavMesh") + Properties.Name + ASSET_FILES_EXTENSION_WITH_DOT;
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// Generate navmesh tiles data
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const int32 streamInitialCapacity = Math::RoundUpToPowerOf2((Data.Tiles.Count() + 1) * 1024);
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MemoryWriteStream stream(streamInitialCapacity);
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Data.Save(stream);
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BytesContainer bytesContainer;
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bytesContainer.Link(stream.GetHandle(), stream.GetPosition());
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// Save asset to file
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if (AssetsImportingManager::Create(AssetsImportingManager::CreateRawDataTag, assetPath, assetId, (void*)&bytesContainer))
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{
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LOG(Warning, "Failed to save navmesh tiles data to file.");
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return;
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}
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// Link the created asset
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DataAsset = assetId;
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#endif
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}
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void NavMesh::ClearData()
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{
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if (Data.Tiles.HasItems())
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{
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IsDataDirty = true;
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Data.TileSize = 0.0f;
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Data.Tiles.Resize(0);
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}
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}
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NavMeshRuntime* NavMesh::GetRuntime(bool createIfMissing) const
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{
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return NavMeshRuntime::Get(Properties, createIfMissing);
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}
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void NavMesh::AddTiles()
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{
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auto navMesh = NavMeshRuntime::Get(Properties, true);
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navMesh->AddTiles(this);
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}
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void NavMesh::RemoveTiles()
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{
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auto navMesh = NavMeshRuntime::Get(Properties, false);
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if (navMesh)
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navMesh->RemoveTiles(this);
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}
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void NavMesh::OnDataAssetLoaded()
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{
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// Skip if already has data (prevent reloading navmesh on saving)
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if (Data.Tiles.HasItems())
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return;
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const bool isEnabled = IsDuringPlay() && IsActiveInHierarchy();
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// Remove added tiles
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if (isEnabled)
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{
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RemoveTiles();
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}
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// Load navmesh tiles
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BytesContainer data;
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data.Link(DataAsset->Data);
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Data.Load(data, false);
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IsDataDirty = false;
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// Add loaded tiles
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if (isEnabled)
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{
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AddTiles();
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}
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}
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void NavMesh::Serialize(SerializeStream& stream, const void* otherObj)
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{
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// Base
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Actor::Serialize(stream, otherObj);
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#if USE_EDITOR
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// Save navmesh tiles to asset (if modified)
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if (IsDataDirty)
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SaveNavMesh();
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#endif
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SERIALIZE_GET_OTHER_OBJ(NavMesh);
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SERIALIZE(DataAsset);
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SERIALIZE(Properties);
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}
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void NavMesh::Deserialize(DeserializeStream& stream, ISerializeModifier* modifier)
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{
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// Base
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Actor::Deserialize(stream, modifier);
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DESERIALIZE(DataAsset);
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DESERIALIZE(Properties);
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}
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void NavMesh::OnEnable()
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{
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// Base
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Actor::OnEnable();
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GetScene()->NavigationMeshes.Add(this);
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AddTiles();
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}
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void NavMesh::OnDisable()
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{
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RemoveTiles();
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GetScene()->NavigationMeshes.Remove(this);
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// Base
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Actor::OnDisable();
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}
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