Function ControlAutoGun

TombEngine/Objects/TR5/Entity/AutoGun.cpp:82–202

	}

	void ControlAutoGun(short itemNumber)
	{
		auto& item = g_Level.Items[itemNumber];
		auto& playerItem = *LaraItem;
		
		if (!TriggerActive(&item))
			return;

		if (TestLastFrame(*&item))
		{
			auto& autoGun = *GetCreatureInfo(&item);

			// Set visible meshes.
			item.MeshBits.Set(AutoGunClosedHatchJoints);
			item.MeshBits.Clear(AutoGunChassisJoints);

			// Assess line of sight.
			auto origin = GameVector(item.Pose.Position, item.RoomNumber);
			auto target = GameVector(GetJointPosition(&playerItem, LM_TORSO), playerItem.RoomNumber);
			bool los = LOS(&origin, &target);

			// Interpolate orientation.
			auto orient = EulerAngles(item.ItemFlags[0], item.ItemFlags[1], 0);
			auto orientTo = los ? Geometry::GetOrientToPoint(origin.ToVector3(), target.ToVector3()) : item.Pose.Orientation;
			orient.Lerp(orientTo, AUTO_GUN_ORIENT_LERP_ALPHA);

			item.ItemFlags[0] = orient.x;
			item.ItemFlags[1] = orient.y;

			auto deltaAngle = orient - orientTo;

			// Handle joint rotation.
			autoGun.JointRotation[0] = orient.y;
			autoGun.JointRotation[1] = orient.x;
			autoGun.JointRotation[2] += item.ItemFlags[2];

			// Fire gunshot.
			if (los &&
				abs(deltaAngle.x) <= AUTO_GUN_FIRE_CONSTRAINT_ANGLE &&
				abs(deltaAngle.y) <= AUTO_GUN_FIRE_CONSTRAINT_ANGLE)
			{
				SoundEffect(SFX_TR4_HK_FIRE, &item.Pose, SoundEnvironment::Land, 0.8f);

				if (GlobalCounter & 1)
				{
					item.MeshBits.Set(AutoGunFlashJoints);

					auto lightColor = Vector3(Random::GenerateFloat(0.75f, 0.85f), Random::GenerateFloat(0.5f, 0.6f), 0.0f) * 255;
					SpawnDynamicLight(origin.x, origin.y, origin.z, 10, lightColor.x, lightColor.y, lightColor.z);

					// Spawn blood.
					if (Random::TestProbability(AUTO_GUN_BLOOD_EFFECT_CHANCE))
					{
						DoDamage(&playerItem, AUTO_GUN_SHOT_DAMAGE);

						auto bloodPos = GetJointPosition(&playerItem, Random::GenerateInt(0, NUM_LARA_MESHES - 1));
						float bloodVel = Random::GenerateFloat(4.0f, 8.0f);
						DoBloodSplat(bloodPos.x, bloodPos.y, bloodPos.z, bloodVel, Random::GenerateAngle(), playerItem.RoomNumber);