make vehicle freecam work better at high fps

Fixes FOV, Angle limit, and rotation speed at high FPS to more closely match behavior at 30fps locked.

src/core/Cam.cpp

@@ -4892,12 +4892,12 @@ CCam::Process_FollowCar_SA(const CVector& CameraTarget, float TargetOrientation,
 		if (isCar || isBike) {
 			// 0.4f: CAR_FOV_START_SPEED
 			if (DotProduct(car->GetForward(), car->m_vecMoveSpeed) > 0.4f)
-				FOV += (DotProduct(car->GetForward(), car->m_vecMoveSpeed) - 0.4f) * CTimer::GetTimeStep();
+				FOV += (DotProduct(car->GetForward(), car->m_vecMoveSpeed) - 0.4f) * (CTimer::GetTimeStep() / CTimer::GetTimeStepFix());
 		}
 
 		if (FOV > DefaultFOV)
 			// 0.98f: CAR_FOV_FADE_MULT
-			FOV = Pow(0.98f, CTimer::GetTimeStep()) * (FOV - DefaultFOV) + DefaultFOV;
+			FOV = Pow(0.98f, CTimer::GetTimeStep() / CTimer::GetTimeStepFix()) * (FOV - DefaultFOV) + DefaultFOV;
 
 		FOV = Clamp(FOV, DefaultFOV, DefaultFOV + 30.0f);
 	}
@@ -4965,8 +4965,8 @@ CCam::Process_FollowCar_SA(const CVector& CameraTarget, float TargetOrientation,
 	else if (velocityRightHeading > camRightHeading + PI)
 		velocityRightHeading = velocityRightHeading - TWOPI;
 
-	float betaChangeMult1 = CTimer::GetTimeStep() * CARCAM_SET[camSetArrPos][10];
-	float betaChangeLimit = CTimer::GetTimeStep() * CARCAM_SET[camSetArrPos][11];
+	float betaChangeMult1 = (CTimer::GetTimeStep() / CTimer::GetTimeStepFix()) * CARCAM_SET[camSetArrPos][10];
+	float betaChangeLimit = (CTimer::GetTimeStep() / CTimer::GetTimeStepFix()) * CARCAM_SET[camSetArrPos][11];
 
 	float betaChangeMult2 = (car->m_vecMoveSpeed - DotProduct(car->m_vecMoveSpeed, Front) * Front).Magnitude();
 
@@ -5028,8 +5028,8 @@ CCam::Process_FollowCar_SA(const CVector& CameraTarget, float TargetOrientation,
 	} else {
 		targetAlpha = maxAlphaAllowed;
 	}
-	float maxAlphaBlendAmount = CTimer::GetTimeStep() * CARCAM_SET[camSetArrPos][6];
-	float targetAlphaBlendAmount = (1.0f - Pow(CARCAM_SET[camSetArrPos][5], CTimer::GetTimeStep())) * (targetAlpha - Alpha);
+	float maxAlphaBlendAmount = (CTimer::GetTimeStep() / CTimer::GetTimeStepFix()) * CARCAM_SET[camSetArrPos][6];
+	float targetAlphaBlendAmount = (1.0f - Pow(CARCAM_SET[camSetArrPos][5], CTimer::GetTimeStep() / CTimer::GetTimeStepFix())) * (targetAlpha - Alpha);
 	if (targetAlphaBlendAmount <= maxAlphaBlendAmount) {
 		if (targetAlphaBlendAmount < -maxAlphaBlendAmount)
 			targetAlphaBlendAmount = -maxAlphaBlendAmount;
@@ -5038,7 +5038,7 @@ CCam::Process_FollowCar_SA(const CVector& CameraTarget, float TargetOrientation,
 	}
 
 	// Using GetCarGun(LR/UD) will give us same unprocessed RightStick value as SA
-	float stickX = -(pad->GetCarGunLeftRight());
+	float stickX = -pad->GetCarGunLeftRight();
 	float stickY = -pad->GetCarGunUpDown();
 
 	// In SA this is for not let num2/num8 move camera when Keyboard & Mouse controls are used.
@@ -5125,7 +5125,7 @@ CCam::Process_FollowCar_SA(const CVector& CameraTarget, float TargetOrientation,
 	float betaSpeedFromStickX = xMovement * CARCAM_SET[camSetArrPos][12];
 
 	float newAngleSpeedMaxBlendAmount = CARCAM_SET[camSetArrPos][9];
-	float angleChangeStep = Pow(CARCAM_SET[camSetArrPos][8], CTimer::GetTimeStep());
+	float angleChangeStep = Pow(CARCAM_SET[camSetArrPos][8], CTimer::GetTimeStepFix());
 	float targetBetaWithStickBlendAmount = betaSpeedFromStickX + (targetBeta - Beta) / Max(CTimer::GetTimeStep(), 1.0f);
 
 	if (targetBetaWithStickBlendAmount < -newAngleSpeedMaxBlendAmount)
@@ -5135,7 +5135,7 @@ CCam::Process_FollowCar_SA(const CVector& CameraTarget, float TargetOrientation,
 
 	float angleChangeStepLeft = 1.0f - angleChangeStep;
 	BetaSpeed = targetBetaWithStickBlendAmount * angleChangeStepLeft + angleChangeStep * BetaSpeed;
-	if (Abs(BetaSpeed) < 0.0001f)
+	if (Abs(BetaSpeed) < 0.0001f * CTimer::GetTimeStepFix())
 		BetaSpeed = 0.0f;
 
 	float betaChangePerFrame;
@@ -5176,7 +5176,7 @@ CCam::Process_FollowCar_SA(const CVector& CameraTarget, float TargetOrientation,
 		AlphaSpeed = maxAlphaSpeed;
 	}
 
-	if (Abs(AlphaSpeed) < 0.0001f)
+	if (Abs(AlphaSpeed) < 0.0001f * CTimer::GetTimeStepFix())
 		AlphaSpeed = 0.0f;
 
 		float alphaWithSpeedAccounted;
@@ -5200,12 +5200,12 @@ CCam::Process_FollowCar_SA(const CVector& CameraTarget, float TargetOrientation,
 	}
 
 	// Prevent unsignificant angle changes
-	if (Abs(lastAlpha - Alpha) < 0.0001f)
+	if (Abs(lastAlpha - Alpha) < 0.0001f * CTimer::GetTimeStepFix())
 		Alpha = lastAlpha;
 
 	lastAlpha = Alpha;
 
-	if (Abs(lastBeta - Beta) < 0.0001f)
+	if (Abs(lastBeta - Beta) < 0.0001f * CTimer::GetTimeStepFix())
 		Beta = lastBeta;
 
 	lastBeta = Beta;