World.h 库里的 Trace API

Trace模式
- TraceSingle 单个结果
- TraceMulti 多个结果
Trace 的检测依据
- ByChanne
- ByObjectType
- ByProfile

LineTraceSingleByChannel

由于一般不使用 World 里的Trace API，故本小结只举 LineTraceSingleByChannel 一个例子

Syntax

bool LineTraceSingleByChannel(

	struct FHitResult& OutHit,

	const FVector& Start,

	const FVector& End,

	ECollisionChannel TraceChannel,

	const FCollisionQueryParams& Params = FCollisionQueryParams::DefaultQueryParam,

	const FCollisionResponseParams& ResponseParam = FCollisionResponseParams::DefaultResponseParam

) const;

代码实现

// 碰撞参数

FCollisionQueryParams CollisonQueryParams(TEXT("QueryParams"),true,NULL);

CollisonQueryParams.bTraceComplex = true;

CollisonQueryParams.bReturnPhysicalMaterial = false;

CollisonQueryParams.AddIgnoredActor(this);

// 起始点和检测结果

FVector BeginLoc = GetActorLocation();

FVector EndLoc = BeginLoc + GetActorForwardVector() * 1000;

FHitResult HitResult;

// 射线检测

GetWorld()->LineTraceSingleByChannel(HitResult, BeginLoc, EndLoc, ECollisionChannel::ECC_Visibility, CollisonQueryParams);

// 绘制射线

DrawDebugLine(GetWorld(), BeginLoc, HitResult.GetActor() ? HitResult.Location : EndLoc, FColor::Red, false, 1.0f);

if (HitResult.GetActor())

{

	UKismetSystemLibrary::PrintString(GetWorld(), HitResult.GetActor()->GetName());

}

UKismetSystemLibrary 库里的 Trace API

与蓝图使用的 Trace 节点对应，
实际调用的是 World.h 里的 Trace 函数

LineTrace

LineTraceSingle

根据 Channel 检测单个物体

Syntax

static bool LineTraceSingle(

	const UObject* WorldContextObject,

	const FVector Start,

	const FVector End,

	ETraceTypeQuery TraceChannel,

	bool bTraceComplex,

	const TArray<AActor*>& ActorsToIgnore,

	EDrawDebugTrace::Type DrawDebugType,

	FHitResult& OutHit,

	bool bIgnoreSelf,

	FLinearColor TraceColor = FLinearColor::Red,

	FLinearColor TraceHitColor = FLinearColor::Green,

	float DrawTime = 5.0f

);

ETraceTypeQuery 说明
- 默认 TraceTypeQuery1 —— Visibility
- 默认 TraceTypeQuery2 —— Camera
- 可在 ProjectSettings->Engine->Collision->Trace Channels 添加自定义

代码实现

// 起始点和检测结果

FVector BeginLoc = GetActorLocation();

FVector EndLoc = BeginLoc + GetActorForwardVector() * 1000;

FHitResult HitResult;

// 要忽略的物体

TArray<AActor*> IgnoreActors;	

	// 射线检测

bool bIsHit = UKismetSystemLibrary::LineTraceSingle(GetWorld(), BeginLoc, EndLoc, TraceTypeQuery1, false, IgnoreActors, EDrawDebugTrace::ForDuration, HitResult, true);

if (bIsHit)

{

	UKismetSystemLibrary::PrintString(GetWorld(), HitResult.GetActor()->GetName());

}

LineTraceSingleForObjects

根据 Object Type 检测单个物体

Syntax

static bool LineTraceSingleForObjects(

	const UObject* WorldContextObject,

	const FVector Start,

	const FVector End,

	const TArray<TEnumAsByte<EObjectTypeQuery> > & ObjectTypes,

	bool bTraceComplex,

	const TArray<AActor*>& ActorsToIgnore,

	EDrawDebugTrace::Type DrawDebugType,

	FHitResult& OutHit,

	bool bIgnoreSelf,

	FLinearColor TraceColor = FLinearColor::Red,

	FLinearColor TraceHitColor = FLinearColor::Green,

	float DrawTime = 5.0f

);

EObjectTypeQuery 对应 ObjectType
- 默认 ObjectTypeQuery1 —— WorldStatic
- 默认 ObjectTypeQuery2 —— WorldDynamic
- 默认 ObjectTypeQuery3 —— Oawn
- 默认 ObjectTypeQuery4 —— PhysicasBody
- 默认 ObjectTypeQuery5 —— Vehicle
- 默认 ObjectTypeQuery6 —— Destructible
- 可以再 ProjectSettings->Engine->Collision->Object Channels 添加自定义

代码实现

// 设置要检测的 Object Type

TArray<TEnumAsByte<EObjectTypeQuery> > ObjectTypes;

ObjectTypes.Add(EObjectTypeQuery::ObjectTypeQuery1);

//开始检测

bool bIsHit = UKismetSystemLibrary::LineTraceSingleForObjects(GetWorld(), BeginLoc, EndLoc, ObjectTypes, false, IgnoreActors, EDrawDebugTrace::ForDuration, HitResult, true);

if (bIsHit)

{

	UKismetSystemLibrary::PrintString(GetWorld(), HitResult.GetActor()->GetName());

}

LineTraceSingleByProfile

根据 Collision Preset 检测单个物体

Syntax

static bool LineTraceSingleByProfile(

	const UObject* WorldContextObject,

	const FVector Start,

	const FVector End,

	FName ProfileName,

	bool bTraceComplex,

	const TArray<AActor*>& ActorsToIgnore,

	EDrawDebugTrace::Type DrawDebugType,

	FHitResult& OutHit,

	bool bIgnoreSelf,

	FLinearColor TraceColor = FLinearColor::Red,

	FLinearColor TraceHitColor = FLinearColor::Green,

	float DrawTime = 5.0f

);

ProfileName 对应 Collision Preset 的名称

代码实现

bool bIsHit = UKismetSystemLibrary::LineTraceSingleByProfile(GetWorld(), BeginLoc, EndLoc,TEXT("BlockAll"), false, IgnoreActors, EDrawDebugTrace::ForDuration, HitResult, true);

if (bIsHit)

{

	UKismetSystemLibrary::PrintString(GetWorld(), HitResult.GetActor()->GetName());

}

LineTraceMulti

根据 Channel 检测多个物体，输出 TArray&

Syntax

static bool LineTraceMulti(

	const UObject* WorldContextObject,

	const FVector Start,

	const FVector End,

	ETraceTypeQuery TraceChannel,

	bool bTraceComplex,

	const TArray<AActor*>& ActorsToIgnore,

	EDrawDebugTrace::Type DrawDebugType,

	TArray<FHitResult>& OutHits,

	bool bIgnoreSelf,

	FLinearColor TraceColor = FLinearColor::Red,

	FLinearColor TraceHitColor = FLinearColor::Green,

	float DrawTime = 5.0f

);

LineTraceMultiForObjects

根据 Object Type 检测多个物体，输出 TArray&

Syntax

static bool LineTraceMultiForObjects(

	const UObject* WorldContextObject,

	const FVector Start,

	const FVector End,

	const TArray<TEnumAsByte<EObjectTypeQuery> > & ObjectTypes,

	bool bTraceComplex,

	const TArray<AActor*>& ActorsToIgnore,

	EDrawDebugTrace::Type DrawDebugType,

	TArray<FHitResult>& OutHits,

	bool bIgnoreSelf, FLinearColor TraceColor = FLinearColor::Red,

	FLinearColor TraceHitColor = FLinearColor::Green,

	float DrawTime = 5.0f

);

LineTraceMultiByProfile

根据 Collision Preset 检测多个物体，输出 TArray&

Syntax

static bool LineTraceMultiByProfile

(

	const UObject* WorldContextObject,

	const FVector Start,

	const FVector End,

	FName ProfileName,

	bool bTraceComplex,

	const TArray<AActor*>& ActorsToIgnore,

	EDrawDebugTrace::Type DrawDebugType,

	TArray<FHitResult>& OutHits,

	bool bIgnoreSelf,

	FLinearColor TraceColor = FLinearColor::Red,

	FLinearColor TraceHitColor = FLinearColor::Green,

	float DrawTime = 5.0f

);

BoxTrace

BoxTraceSingle

static bool BoxTraceSingle

(

    const UObject * WorldContextObject,

    const FVector Start,

    const FVector End,

    const FVector HalfSize,

    const FRotator Orientation,

    ETraceTypeQuery TraceChannel,

    bool bTraceComplex,

    const TArray < AActor * > & ActorsToIgnore,

    EDrawDebugTrace::Type DrawDebugType,

    FHitResult & OutHit,

    bool bIgnoreSelf,

    FLinearColor TraceColor,

    FLinearColor TraceHitColor,

    float DrawTime

)

BoxTraceMulti

static bool BoxTraceMulti

(

    const UObject * WorldContextObject,

    const FVector Start,

    const FVector End,

    FVector HalfSize,

    const FRotator Orientation,

    ETraceTypeQuery TraceChannel,

    bool bTraceComplex,

    const TArray < AActor * > & ActorsToIgnore,

    EDrawDebugTrace::Type DrawDebugType,

    TArray < FHitResult > & OutHits,

    bool bIgnoreSelf,

    FLinearColor TraceColor,

    FLinearColor TraceHitColor,

    float DrawTime

)

BoxTraceSingleForObjects

static bool BoxTraceSingleForObjects

(

    const UObject * WorldContextObject,

    const FVector Start,

    const FVector End,

    const FVector HalfSize,

    const FRotator Orientation,

    const TArray < TEnumAsByte < EObjectTypeQuery > > & ObjectTypes,

    bool bTraceComplex,

    const TArray < AActor * > & ActorsToIgnore,

    EDrawDebugTrace::Type DrawDebugType,

    FHitResult & OutHit,

    bool bIgnoreSelf,

    FLinearColor TraceColor,

    FLinearColor TraceHitColor,

    float DrawTime

)

BoxTraceMultiForObjects

static bool BoxTraceMultiForObjects

(

    const UObject * WorldContextObject,

    const FVector Start,

    const FVector End,

    const FVector HalfSize,

    const FRotator Orientation,

    const TArray < TEnumAsByte < EObjectTypeQuery > > & ObjectTypes,

    bool bTraceComplex,

    const TArray < AActor * > & ActorsToIgnore,

    EDrawDebugTrace::Type DrawDebugType,

    TArray < FHitResult > & OutHits,

    bool bIgnoreSelf,

    FLinearColor TraceColor,

    FLinearColor TraceHitColor,

    float DrawTime

)

BoxTraceSingleByProfile

static bool BoxTraceSingleByProfile

(

    const UObject * WorldContextObject,

    const FVector Start,

    const FVector End,

    const FVector HalfSize,

    const FRotator Orientation,

    FName ProfileName,

    bool bTraceComplex,

    const TArray < AActor * > & ActorsToIgnore,

    EDrawDebugTrace::Type DrawDebugType,

    FHitResult & OutHit,

    bool bIgnoreSelf,

    FLinearColor TraceColor,

    FLinearColor TraceHitColor,

    float DrawTime

)

BoxTraceMultiByProfile

static bool BoxTraceMultiByProfile

(

    const UObject * WorldContextObject,

    const FVector Start,

    const FVector End,

    FVector HalfSize,

    const FRotator Orientation,

    FName ProfileName,

    bool bTraceComplex,

    const TArray < AActor * > & ActorsToIgnore,

    EDrawDebugTrace::Type DrawDebugType,

    TArray < FHitResult > & OutHits,

    bool bIgnoreSelf,

    FLinearColor TraceColor,

    FLinearColor TraceHitColor,

    float DrawTime

)

SphereTrace

SphereTraceSingle

static bool SphereTraceSingle

(

    const UObject * WorldContextObject,

    const FVector Start,

    const FVector End,

    float Radius,

    ETraceTypeQuery TraceChannel,

    bool bTraceComplex,

    const TArray < AActor * > & ActorsToIgnore,

    EDrawDebugTrace::Type DrawDebugType,

    FHitResult & OutHit,

    bool bIgnoreSelf,

    FLinearColor TraceColor,

    FLinearColor TraceHitColor,

    float DrawTime

)

SphereTraceMulti

static bool SphereTraceMulti

(

    const UObject * WorldContextObject,

    const FVector Start,

    const FVector End,

    float Radius,

    ETraceTypeQuery TraceChannel,

    bool bTraceComplex,

    const TArray < AActor * > & ActorsToIgnore,

    EDrawDebugTrace::Type DrawDebugType,

    TArray < FHitResult > & OutHits,

    bool bIgnoreSelf,

    FLinearColor TraceColor,

    FLinearColor TraceHitColor,

    float DrawTime

)

SphereTraceSingleForObjects

static bool SphereTraceSingleForObjects

(

    const UObject * WorldContextObject,

    const FVector Start,

    const FVector End,

    float Radius,

    const TArray < TEnumAsByte < EObjectTypeQuery > > & ObjectTypes,

    bool bTraceComplex,

    const TArray < AActor * > & ActorsToIgnore,

    EDrawDebugTrace::Type DrawDebugType,

    FHitResult & OutHit,

    bool bIgnoreSelf,

    FLinearColor TraceColor,

    FLinearColor TraceHitColor,

    float DrawTime

)

SphereTraceMultiForObjects

static bool SphereTraceMultiForObjects

(

    const UObject * WorldContextObject,

    const FVector Start,

    const FVector End,

    float Radius,

    const TArray < TEnumAsByte < EObjectTypeQuery > > & ObjectTypes,

    bool bTraceComplex,

    const TArray < AActor * > & ActorsToIgnore,

    EDrawDebugTrace::Type DrawDebugType,

    TArray < FHitResult > & OutHits,

    bool bIgnoreSelf,

    FLinearColor TraceColor,

    FLinearColor TraceHitColor,

    float DrawTime

)

SphereTraceSingleByProfile

static bool SphereTraceSingleByProfile

(

    const UObject * WorldContextObject,

    const FVector Start,

    const FVector End,

    float Radius,

    FName ProfileName,

    bool bTraceComplex,

    const TArray < AActor * > & ActorsToIgnore,

    EDrawDebugTrace::Type DrawDebugType,

    FHitResult & OutHit,

    bool bIgnoreSelf,

    FLinearColor TraceColor,

    FLinearColor TraceHitColor,

    float DrawTime

)

SphereTraceMultiByProfile

static bool SphereTraceMultiByProfile

(

    const UObject * WorldContextObject,

    const FVector Start,

    const FVector End,

    float Radius,

    FName ProfileName,

    bool bTraceComplex,

    const TArray < AActor * > & ActorsToIgnore,

    EDrawDebugTrace::Type DrawDebugType,

    TArray < FHitResult > & OutHits,

    bool bIgnoreSelf,

    FLinearColor TraceColor,

    FLinearColor TraceHitColor,

    float DrawTime

)

CapsuleTrace

CapsuleTraceSingle

static bool CapsuleTraceSingle

(

    const UObject * WorldContextObject,

    const FVector Start,

    const FVector End,

    float Radius,

    float HalfHeight,

    ETraceTypeQuery TraceChannel,

    bool bTraceComplex,

    const TArray < AActor * > & ActorsToIgnore,

    EDrawDebugTrace::Type DrawDebugType,

    FHitResult & OutHit,

    bool bIgnoreSelf,

    FLinearColor TraceColor,

    FLinearColor TraceHitColor,

    float DrawTime

)

CapsuleTraceMulti

static bool CapsuleTraceMulti

(

    const UObject * WorldContextObject,

    const FVector Start,

    const FVector End,

    float Radius,

    float HalfHeight,

    ETraceTypeQuery TraceChannel,

    bool bTraceComplex,

    const TArray < AActor * > & ActorsToIgnore,

    EDrawDebugTrace::Type DrawDebugType,

    TArray < FHitResult > & OutHits,

    bool bIgnoreSelf,

    FLinearColor TraceColor,

    FLinearColor TraceHitColor,

    float DrawTime

)

CapsuleTraceSingleForObjects

static bool CapsuleTraceSingleForObjects

(

    const UObject * WorldContextObject,

    const FVector Start,

    const FVector End,

    float Radius,

    float HalfHeight,

    const TArray < TEnumAsByte < EObjectTypeQuery > > & ObjectTypes,

    bool bTraceComplex,

    const TArray < AActor * > & ActorsToIgnore,

    EDrawDebugTrace::Type DrawDebugType,

    FHitResult & OutHit,

    bool bIgnoreSelf,

    FLinearColor TraceColor,

    FLinearColor TraceHitColor,

    float DrawTime

)

CapsuleTraceMultiForObjects

static bool CapsuleTraceMultiForObjects

(

    const UObject * WorldContextObject,

    const FVector Start,

    const FVector End,

    float Radius,

    float HalfHeight,

    const TArray < TEnumAsByte < EObjectTypeQuery > > & ObjectTypes,

    bool bTraceComplex,

    const TArray < AActor * > & ActorsToIgnore,

    EDrawDebugTrace::Type DrawDebugType,

    TArray < FHitResult > & OutHits,

    bool bIgnoreSelf,

    FLinearColor TraceColor,

    FLinearColor TraceHitColor,

    float DrawTime

)

CapsuleTraceSingleByProfile

static bool CapsuleTraceSingleByProfile

(

    const UObject * WorldContextObject,

    const FVector Start,

    const FVector End,

    float Radius,

    float HalfHeight,

    FName ProfileName,

    bool bTraceComplex,

    const TArray < AActor * > & ActorsToIgnore,

    EDrawDebugTrace::Type DrawDebugType,

    FHitResult & OutHit,

    bool bIgnoreSelf,

    FLinearColor TraceColor,

    FLinearColor TraceHitColor,

    float DrawTime

)

CapsuleTraceMultiByProfile

static bool CapsuleTraceMultiByProfile

(

    const UObject * WorldContextObject,

    const FVector Start,

    const FVector End,

    float Radius,

    float HalfHeight,

    FName ProfileName,

    bool bTraceComplex,

    const TArray < AActor * > & ActorsToIgnore,

    EDrawDebugTrace::Type DrawDebugType,

    TArray < FHitResult > & OutHits,

    bool bIgnoreSelf,

    FLinearColor TraceColor,

    FLinearColor TraceHitColor,

    float DrawTime

)

参考

UKismetSystemLibrary

【UE4 C++】射线检测 LineTrace 及 BoxTrace、SphereTrace、CapsuleTrace API的更多相关文章

【Unity3D】枪战游戏—发射子弹、射线检测
一.子弹的碰撞检测: 因为子弹的移动速度非常的快,那么如果为子弹添加一个collider,就有可能检测不到了. 因为collider是每一帧在执行,第一帧子弹可能在100米处,那么下一帧就在900米处 ...
Unity3D 之射线检测
这里来记录下射线检测的相关内容: 射线检测故名就是通过射线去检测是否和碰撞器产生了交集,和碰撞器与碰撞器发生交集一样,会返回一个真. 射线的用法很多:比如检测是否跳跃,通过向地面投射射线控制在地面时候 ...
Unity3D 5.0简单的射线检测实现跳跃功能
这里是一个简单的跳跃,5.0和其他版本貌似不一样,并且,再起跳功能做的不完全. 不过一个基本的思路在这里. 1.首先,射线检测,这里是利用一个空对象,放到主角对象的下面 2.然后调节射线的位置,在主角 ...
UGUI射线检测
1.Graphic Raycaster 主要用于UI上的射线检测,挂有这个组件的物体,必须要挂上Canvas这个组件(当挂上Graphic Raycaster时Canvas也会自动挂上). Ignor ...
Unity射线检测的用法总结
RayCast 射线检测本文提供全流程,中文翻译. Chinar 坚持将简单的生活方式,带给世人!(拥有更好的阅读体验 -- 高分辨率用户请根据需求调整网页缩放比例) Chinar -- 心分享.心 ...
U3D学习10——关节和射线检测
1.弹簧 2.铰链 3.固定关节 4.角色关节 5.自定义关节 6.raycast和raycasthit 射线有位移参数,可以设定只触发某一层的. 7.射线检测用于高速和精确 update是 ...
Layabox 3D游戏开发学习笔记---射线检测，鼠标控制物体运动
核心要点:3D物体碰撞是靠射线检测,射线与碰撞器相撞获取对应的碰撞点信息. class RayPicking03 { private ray: Laya.Ray; private point: Lay ...
【转】 [UnityUI]UGUI射线检测
http://blog.csdn.net/lyh916/article/details/50947026 1.Graphic Raycaster 主要用于UI上的射线检测,挂有这个组件的物体,必须要挂 ...
Unity - Raycast 射线检测
本文简要分析了Unity中射线检测的基本原理及用法,包括: Ray 射线 RaycastHit 光线投射碰撞信息 Raycast 光线投射 SphereCast 球体投射 OverlapSphere ...

随机推荐

一、Rabbitmq的简单介绍
以下只是本人从零学习过程的整理部分内容参考地址:https://www.cnblogs.com/ysocean/p/9240877.html 1.RabbitMQ的概念 RabbitMQ是实现了高级 ...
Kubernetes-Pod介绍(-)
前言本篇是Kubernetes第四篇,大家一定要把环境搭建起来,看是解决不了问题的,必须实战.从现在开始都是重要的核心概念,此篇偏一些Pod的概念介绍,后续每篇都会有实战. Kubernetes系列 ...
Django——ORM打印SQL
如果想打印ORM转换过程中的SQL,需要在settings.py中进行如下配置: LOGGING = { 'version': 1, 'disable_existing_loggers': False ...
C# 爬虫框架实现概述
目录: C# 爬虫框架实现概述 C# 爬虫框架实现流程_爬虫结构/原理 C# 爬虫框架实现流程_各个类开发 C# 爬虫框架实现流程_遇到的问题 C# 爬虫框架实现后记 C#爬虫框架实现源代 ...
adb 常用命令大全（6）- 模拟按键输入
语法格式 input [<source>] <command> [<arg>...] 物理键 # 电源键 adb shell input keyevent 26 # ...
golang 判断平台是32位还是64位
在strconv包中有个常量 const intSize = 32 << ( ^uint(0) >> 63 ) const IntSize = intSize ...
Docker 安装 MySQL5.6
方法一.docker pull mysql查找Docker Hub上的mysql镜像 #docker search mysql 这里我们拉取官方的镜像,标签为5.6 #docker pull mysq ...
搭建GIT仓库
Java大数操作
Java的Math包中提供了两个类用于对大数进行操作: BigInteger类,用于大整数的操作 BigDecimal类,用于大的小数操作 BigInteger类 Java中的基本类型中,表示整数的有 ...
概述 .NET 6 ThreadPool 实现
目录前言任务的调度基本调度单元 IThreadPoolWorkItem 实现类的实例. Task 全局队列本地队列偷窃机制 Worker Thread 的生命周期管理线程生命注入实验 .N ...

【UE4 C++】 射线检测 LineTrace 及 BoxTrace、SphereTrace、CapsuleTrace API

World.h 库里的 Trace API

LineTraceSingleByChannel

UKismetSystemLibrary 库里的 Trace API

LineTrace

LineTraceSingle

LineTraceSingleForObjects

LineTraceSingleByProfile

LineTraceMulti

LineTraceMultiForObjects

LineTraceMultiByProfile

BoxTrace

SphereTrace

CapsuleTrace

参考

【UE4 C++】 射线检测 LineTrace 及 BoxTrace、SphereTrace、CapsuleTrace API的更多相关文章

随机推荐

热门专题

【UE4 C++】射线检测 LineTrace 及 BoxTrace、SphereTrace、CapsuleTrace API

【UE4 C++】射线检测 LineTrace 及 BoxTrace、SphereTrace、CapsuleTrace API的更多相关文章