Function GuardControl

TombEngine/Objects/TR5/Entity/tr5_guard.cpp:317–1034

TODO: Deal with LaraItem global.

	// TODO: Deal with LaraItem global.
	void GuardControl(short itemNumber)
	{
		if (!CreatureActive(itemNumber))
			return;

		auto* item = &g_Level.Items[itemNumber];
		auto* creature = GetCreatureInfo(item);

		short angle = 0;
		short torsoX = 0;
		short torsoY = 0;
		short headY = 0;

		bool canJump1block = CanCreatureJump(*item, JumpDistance::Block1);
		bool canJump2blocks = !canJump1block && CanCreatureJump(*item, JumpDistance::Block2);

		if (item->AIBits)
			GetAITarget(creature);
		else
			creature->Enemy = LaraItem;

		if (creature->MuzzleFlash[0].Delay != 0)
			creature->MuzzleFlash[0].Delay--;

		AI_INFO AI;
		CreatureAIInfo(item, &AI);

		AI_INFO laraAI;
		if (creature->Enemy == LaraItem)
		{
			laraAI.angle = AI.angle;
			laraAI.distance = AI.distance;
		}
		else
		{
			int dx = LaraItem->Pose.Position.x - item->Pose.Position.x;
			int dz = LaraItem->Pose.Position.z - item->Pose.Position.z;
			laraAI.angle = phd_atan(dz, dx) - item->Pose.Orientation.y;
			laraAI.distance = SQUARE(dz) + SQUARE(dx);
		}
	
		if (item->HitPoints <= 0)
		{
			if (item->Animation.ActiveState != GUARD_STATE_DEATH_1 &&
				item->Animation.ActiveState != GUARD_STATE_DEATH_2)
			{
				if (laraAI.angle >= GUARD_LARA_ANGLE_FOR_DEATH2 || laraAI.angle <= -GUARD_LARA_ANGLE_FOR_DEATH2)
				{
					SetAnimation(item, GUARD_ANIM_DEATH_2);
					item->Pose.Orientation.y += laraAI.angle + ANGLE(-180.0f);
				}
				else
				{
					SetAnimation(item, GUARD_ANIM_DEATH_1);
					item->Pose.Orientation.y += laraAI.angle;
				}

				item->Animation.FrameNumber = 0;