Unreal Engine 4.x Scripting with C++ Cookbook - Second Edition

How it works...

Getting one object to look at another, with a desired up vector, can be done by calling the correct function, depending on your object's stock orientation. Usually, you want to reorient the X-axis (Forward), while specifying either the Y-axis (Right) or Z-axis (Up) vectors (FRotationMatrix::MakeFromXY()). For example, to make an actor look along a lookAlong vector, with its right side facing right, we'd construct and set FRotationMatrix for it, as follows:

FRotationMatrix rotationMatrix = FRotationMatrix::MakeFromXY(  lookAlong, right ); 
actor->SetActorRotation( rotationMatrix.Rotator() );