实现敲击凹陷

BladeSmith.sln.DotSettings.user

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Source/BladeSmith/BladeSmith.Build.cs

@@ -6,6 +6,7 @@ public class BladeSmith : ModuleRules
 {
 	public BladeSmith(ReadOnlyTargetRules Target) : base(Target)
 	{
+		PrivateDependencyModuleNames.AddRange(new string[] { "GeometryScriptingCore" });
 		PCHUsage = PCHUsageMode.UseExplicitOrSharedPCHs;
 
 		// 如果你的模块类型是 Runtime 或 Gameplay 相关的，则添加这行：

Source/BladeSmith/DeformAsyncTask.h

@@ -0,0 +1,98 @@
+#pragma once
+#include "CoreMinimal.h"
+#include "GeometryScript/GeometryScriptSelectionTypes.h"
+#include "GeometryScript/MeshDeformFunctions.h"
+#include "GeometryScript/MeshSpatialFunctions.h"
+#include "GeometryScript/MeshTransformFunctions.h"
+#include "Kismet/BlueprintAsyncActionBase.h"
+#include "DeformAsyncTask.generated.h"
+
+
+DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnDeformFinished, bool, ResultValue);
+// .h 文件
+UCLASS()
+class UDeformAsyncTask : public UBlueprintAsyncActionBase
+{
+    GENERATED_BODY()
+
+public:
+    // 暴露给蓝图的静态工厂方法
+    UFUNCTION(BlueprintCallable, meta = (BlueprintInternalUseOnly = "true", Category = "AsyncTask", WorldContext = "WorldContextObject"))
+    static UDeformAsyncTask* StartCalculation(UObject* WorldContextObject,FGeometryScriptMeshSelection& InSelection,FVector& InLocalHitLocation,FVector& InLocaHitNormal);
+
+    // 成功回调引脚 (在游戏线程触发)
+    UPROPERTY(BlueprintAssignable)
+    FOnDeformFinished OnDeformFinish;
+
+    virtual void Activate() override;
+
+private:
+    FGeometryScriptMeshSelection Selection;
+    FVector LocalHitLocation;
+    FVector LocaHitNormal;
+    // 核心计算逻辑，在工作线程中执行
+    void PerformBackgroundCalculation();
+};
+
+inline UDeformAsyncTask* UDeformAsyncTask::StartCalculation(UObject* WorldContextObject,
+    FGeometryScriptMeshSelection& InSelection, FVector& InLocalHitLocation, FVector& InLocaHitNormal)
+{
+    // 1. 检查 WorldContextObject 是否有效，这是异步操作节点的标准做法
+    if (!WorldContextObject || !WorldContextObject->GetWorld())
+    {
+        return nullptr;
+    }
+
+    // 2. 创建 UCalculateAsyncTask 的实例
+    // 使用 NewObject 而非 new，以确保对象被 UE 的内存管理系统(GC)追踪
+    UDeformAsyncTask* Task = NewObject<UDeformAsyncTask>();
+    
+    // 3. 存储输入参数
+    Task->Selection = InSelection;
+    Task->LocalHitLocation = InLocalHitLocation;
+    Task->LocaHitNormal = InLocaHitNormal;
+    
+    // 4. 将实例的生命周期与 WorldContextObject 绑定，确保在关卡卸载时它能被回收
+    Task->RegisterWithGameInstance(WorldContextObject);
+
+    // 5. 调用 Activate() 启动实际的后台逻辑
+    // Activate() 才是真正执行后台任务的地方
+    Task->Activate();
+
+    // 6. 返回实例，在蓝图节点上显示回调引脚
+    return Task;
+}
+
+// .cpp 文件（在 Activate 中启动后台任务）
+inline void UDeformAsyncTask::Activate()
+{
+    // 启动一个后台任务，使用 UE 的 Task Graph
+    // 这里的 lambda 函数会在工作线程上运行
+    (new FAutoDeleteAsyncTask<TFunction<void()>>(
+        [this]()
+        {
+            PerformBackgroundCalculation(); // 耗时的计算在这里执行
+
+            // 切换回游戏线程执行回调
+            FFunctionGraphTask::CreateAndDispatchWhenReady(
+                [this]()
+                {
+                    if (IsValid(this))
+                    {
+                        // 确保在游戏线程上触发蓝图回调
+                        OnDeformFinish.Broadcast(true);
+                        SetReadyToDestroy();
+                    }
+                },
+                TStatId(),
+                nullptr,
+                ENamedThreads::GameThread // 确保在游戏线程回调
+            );
+        }
+    ))->StartBackgroundTask();
+}
+
+inline void UDeformAsyncTask::PerformBackgroundCalculation()
+{
+    UGeometryScriptLibrary_MeshTransformFunctions::TranslateMeshSelection()
+}