Porting Weapon Rotation Leading from UDK/UE3

Development Programming & Scripting C++
6

Small update - I’ve tweaked this a bit to also do some location offset based on the lag/lead and I think the results are pretty good.
If anyone’s interested, here’s the updated version of the UpdateLocRot function:



void APWNWeapon::UpdateLocRot(FVector newLoc, FRotator newRot, float deltaTime)
{
	FRotator finalRot = newRot;

	// Rotation Leading/Lag
	float lagDiff;	
	finalRot.Pitch = LagWeaponRotation(newRot.Pitch, LastRotation.Pitch, deltaTime, MaxPitchLag, 1, lagDiff);
	finalRot.Yaw = LagWeaponRotation(newRot.Yaw, LastRotation.Yaw, deltaTime, MaxYawLag, 0, lagDiff);
	finalRot.Roll = newRot.Roll;

	// Location offset
	float locDiff = lagDiff / MaxYawLag;
	locDiff *= MaxLocLagX;

	//UPWNGameGlobals::Log(TEXT("YAW"), lagDiff, true);
	ArmMesh->SetRelativeLocation(FVector(ArmMeshOffset.X, ArmMeshOffset.Y + locDiff, ArmMeshOffset.Z), false);

	// Set our loc	
	LastRotation = newRot;
	this->SetActorLocation(newLoc);
	this->SetActorRotation(finalRot);
	//ArmMesh->SetRelativeRotation(finalRot);
}

P.S. you will also have to add the following variable declaration to your header:



/** Max Location Lag - X */
float MaxLocLagX = 5.0f;