Could not be compiled. try rebuilding from source manually failure

Egemen_Cakici · February 12, 2024, 6:35pm

Hello everyone.I am Egemen and I bought UnrealEngine course from Udemy 1 months ago.In the 79th lecture,I have a “could not be compiled. try rebuilding from source manually”
failure.In the begin of this section,I wasnt able to open first person game but I solved it.When I have tried live coding in the 3.22 in this lesson,the oıtput log showed a build fail.After that,I turned off the settings of live coding,which is in the Editor Preferences,and I restarted the UnrealEngine5.Then,this failture appeared.

DanM · February 13, 2024, 9:25am

Are you trying to build the BattleTank project you got from Git(Hub|Lab)? That was made in 4.15 (I think) so will have compilation errors due to version differences that you will need to fix.

For example RelativeRotation is a private member in later versions so would need to use GetRelativeRotation() for this line

github.com

UnrealCourse/04_BattleTank/blob/19ffc19646ad05f6adeed1816897fa529cdefcea/BattleTank/Source/BattleTank/Private/TankBarrel.cpp#L13

    
      
          #include "BattleTank.h"
          #include "TankBarrel.h"
          
          

          
void UTankBarrel::Elevate(float RelativeSpeed)
          {
          	// Move the barrel the right amount this frame
          	// Given a max elevation speed, and the frame time
          	RelativeSpeed = FMath::Clamp<float>(RelativeSpeed, -1, +1);
          	auto ElevationChange = RelativeSpeed * MaxDegreesPerSecond * GetWorld()->DeltaTimeSeconds;
          	auto RawNewElevation = RelativeRotation.Pitch + ElevationChange;
          	auto Elevation = FMath::Clamp<float>(RawNewElevation, MinElevationDegrees, MaxElevationDegrees);
          	SetRelativeRotation(FRotator(Elevation, 0, 0));
          }