73 lines
2.2 KiB
Markdown
73 lines
2.2 KiB
Markdown
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# TraceQuery
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- **功能描述：** Enum /Script/Engine.ECollisionChannel
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- **使用位置：** UENUM::UMETA
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- **引擎模块：** Enum Property
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- **元数据类型：** bool
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- **常用程度：** 0
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只在ECollisionChannel 上使用，指定哪些通道是用来Trace的。
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## 源码例子：
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```cpp
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UENUM(BlueprintType)
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enum ECollisionChannel : int
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{
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ECC_WorldStatic UMETA(DisplayName="WorldStatic"),
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ECC_WorldDynamic UMETA(DisplayName="WorldDynamic"),
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ECC_Pawn UMETA(DisplayName="Pawn"),
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ECC_Visibility UMETA(DisplayName="Visibility" , TraceQuery="1"),
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ECC_Camera UMETA(DisplayName="Camera" , TraceQuery="1"),
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ECC_PhysicsBody UMETA(DisplayName="PhysicsBody"),
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ECC_Vehicle UMETA(DisplayName="Vehicle"),
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ECC_Destructible UMETA(DisplayName="Destructible"),
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/** Reserved for gizmo collision */
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ECC_EngineTraceChannel1 UMETA(Hidden),
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ECC_EngineTraceChannel2 UMETA(Hidden),
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ECC_EngineTraceChannel3 UMETA(Hidden),
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ECC_EngineTraceChannel4 UMETA(Hidden),
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ECC_EngineTraceChannel5 UMETA(Hidden),
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ECC_EngineTraceChannel6 UMETA(Hidden),
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ECC_GameTraceChannel1 UMETA(Hidden),
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ECC_GameTraceChannel2 UMETA(Hidden),
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ECC_GameTraceChannel3 UMETA(Hidden),
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ECC_GameTraceChannel4 UMETA(Hidden),
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ECC_GameTraceChannel5 UMETA(Hidden),
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ECC_GameTraceChannel6 UMETA(Hidden),
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ECC_GameTraceChannel7 UMETA(Hidden),
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ECC_GameTraceChannel8 UMETA(Hidden),
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ECC_GameTraceChannel9 UMETA(Hidden),
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ECC_GameTraceChannel10 UMETA(Hidden),
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ECC_GameTraceChannel11 UMETA(Hidden),
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ECC_GameTraceChannel12 UMETA(Hidden),
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ECC_GameTraceChannel13 UMETA(Hidden),
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ECC_GameTraceChannel14 UMETA(Hidden),
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ECC_GameTraceChannel15 UMETA(Hidden),
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ECC_GameTraceChannel16 UMETA(Hidden),
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ECC_GameTraceChannel17 UMETA(Hidden),
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ECC_GameTraceChannel18 UMETA(Hidden),
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/** Add new serializeable channels above here (i.e. entries that exist in FCollisionResponseContainer) */
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/** Add only nonserialized/transient flags below */
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// NOTE!!!! THESE ARE BEING DEPRECATED BUT STILL THERE FOR BLUEPRINT. PLEASE DO NOT USE THEM IN CODE
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ECC_OverlapAll_Deprecated UMETA(Hidden),
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ECC_MAX,
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};
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```
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## 原理：
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```cpp
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void UCollisionProfile::LoadProfileConfig(bool bForceInit)
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{
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static const FString TraceType = TEXT("TraceQuery");
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}
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```
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