How can I rotate two vectors as i rotate the object

Development Programming & Scripting
1

I know that ( GetActorLocation() + (GetActorForward() * 40) ) will represent a line starting from the actor going forward for 40 units.
But, The problem is whenever I rotate the object; the vectors don’t rotate. I want them to rotate as I rotate the object

Here’s the code and run

	float Degrees = ThresholdDegree; // 90
	float Radian = UKismetMathLibrary::DegreesToRadians(Degrees/2);

	FVector Line1 =  FVector(FMath::Cos(Radian), FMath::Sin(Radian), 0);
	FVector Line2 = FVector(FMath::Cos(-Radian), FMath::Sin(-Radian), 0);

	DrawDebugLine(GetWorld(), GetActorLocation(), GetActorLocation() + (Line1 * 50), FColor::Green, false, 0.0f); // Line1
	DrawDebugLine(GetWorld(), GetActorLocation(), GetActorLocation() + (Line2 * 50), FColor::Green, false, 0.0f); // Line2
	DrawDebugDirectionalArrow(GetWorld(), GetActorLocation(), GetActorLocation() + (GetActorForwardVector() * 50), 1, FColor::Cyan, false, 0.0f, 0, 0.2); // Draw forward vector

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2

Hello! The main thing - you calculate Line1 and Line2 in global coordinate system, that’s why they are not affected by Actor Rotation. You can use vector linear combinations for it:

cos(alpha) GetActorForwardVector() + sin(alpha) GetActorRightVector()

and

cos(alpha) GetActorForwardVector() - sin(alpha) GetActorRightVector()

3

It worked, Thank you so much <3