[UE4]C++代码实现划线DrawLine

在场景中划线实例： 

ULineBatchComponent* const LineBatcher = GetWorld()->PersistentLineBatcher;//GetDebugLineBatcher(GetWorld(), bPersistentLines, LifeTime, (DepthPriority == SDPG_Foreground));
const float LifeTime = 10.f;
if (LineBatcher != NULL)
{
	float LineLifeTime = (LifeTime > 0.f) ? LifeTime : LineBatcher->DefaultLifeTime;

	LineBatcher->DrawLine(FVector(50.f, 50.f, 50.f), FVector(1000.f, 1000.f, 1000.f), FLinearColor::Blue, 10, 0.f, LineLifeTime);
}

 

在游戏HUD中划线：
AHUD::DrawLine
https://docs.unrealengine.com/latest/INT/API/Runtime/Engine/GameFramework/AHUD/DrawLine/index.html

UFUNCTION(BlueprintCallable, Category=HUD, Meta=(LineColor="(R=0,G=0,B=0,A=1)"))
void DrawLine
(
    float StartScreenX,
    float StartScreenY,
    float EndScreenX,
    float EndScreenY,
    FLinearColor LineColor
)

 

参考自：
How to use DrawLines ?

https://answers.unrealengine.com/questions/214153/how-to-use-drawlines.html

Draw debug lines for line tracing

https://answers.unrealengine.com/questions/28128/draw-debug-lines-for-line-tracing.html