xref: /dports/games/d2x/d2x-0.2.5/main/ai2.c

/*
THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
SOFTWARE CORPORATION ("PARALLAX").  PARALLAX, IN DISTRIBUTING THE CODE TO
END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
IN USING, DISPLAYING,  AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
FREE PURPOSES.  IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES.  THE END-USER UNDERSTANDS
AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
*/

#ifdef HAVE_CONFIG_H
#include <conf.h>
#endif

#ifdef RCS
static char rcsid[] = "$Id: ai2.c,v 1.3 2001/10/25 02:15:55 bradleyb Exp $";
#endif

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

#include "inferno.h"
#include "game.h"
#include "mono.h"
#include "3d.h"

#include "u_mem.h"
#include "object.h"
#include "render.h"
#include "error.h"
#include "ai.h"
#include "laser.h"
#include "fvi.h"
#include "polyobj.h"
#include "bm.h"
#include "weapon.h"
#include "physics.h"
#include "collide.h"
#include "player.h"
#include "wall.h"
#include "vclip.h"
#include "digi.h"
#include "fireball.h"
#include "morph.h"
#include "effects.h"
#include "timer.h"
#include "sounds.h"
#include "cntrlcen.h"
#include "multibot.h"
#ifdef NETWORK
#include "multi.h"
#include "network.h"
#endif
#include "gameseq.h"
#include "key.h"
#include "powerup.h"
#include "gauges.h"
#include "text.h"

#ifdef EDITOR
#include "editor/editor.h"
#include "editor/kdefs.h"
#endif

#ifndef NDEBUG
#include "string.h"
#include <time.h>
#endif

void teleport_boss(object *objp);
int boss_fits_in_seg(object *boss_objp, int segnum);


int	Flinch_scale = 4;
int	Attack_scale = 24;
byte	Mike_to_matt_xlate[] = {AS_REST, AS_REST, AS_ALERT, AS_ALERT, AS_FLINCH, AS_FIRE, AS_RECOIL, AS_REST};

//	Amount of time since the current robot was last processed for things such as movement.
//	It is not valid to use FrameTime because robots do not get moved every frame.

int	Num_boss_teleport_segs;
short	Boss_teleport_segs[MAX_BOSS_TELEPORT_SEGS];
int	Num_boss_gate_segs;
short	Boss_gate_segs[MAX_BOSS_TELEPORT_SEGS];

// ---------------------------------------------------------
//	On entry, N_robot_types had darn sure better be set.
//	Mallocs N_robot_types robot_info structs into global Robot_info.
void init_ai_system(void)
{
#if 0
	int	i;

	mprintf((0, "Trying to malloc %i bytes for Robot_info.\n", N_robot_types * sizeof(*Robot_info)));
	Robot_info = (robot_info *) d_malloc( N_robot_types * sizeof(*Robot_info) );
	mprintf((0, "Robot_info = %i\n", Robot_info));

	for (i=0; i<N_robot_types; i++) {
		Robot_info[i].field_of_view = F1_0/2;
		Robot_info[i].firing_wait = F1_0;
		Robot_info[i].turn_time = F1_0*2;
		// -- Robot_info[i].fire_power = F1_0;
		// -- Robot_info[i].shield = F1_0/2;
		Robot_info[i].max_speed = F1_0*10;
		Robot_info[i].always_0xabcd = 0xabcd;
	}
#endif

}

// ---------------------------------------------------------------------------------------------------------------------
//	Given a behavior, set initial mode.
int ai_behavior_to_mode(int behavior)
{
	switch (behavior) {
		case AIB_STILL:			return AIM_STILL;
		case AIB_NORMAL:			return AIM_CHASE_OBJECT;
		case AIB_BEHIND:			return AIM_BEHIND;
		case AIB_RUN_FROM:		return AIM_RUN_FROM_OBJECT;
		case AIB_SNIPE:			return AIM_STILL;	//	Changed, 09/13/95, MK, snipers are still until they see you or are hit.
		case AIB_STATION:			return AIM_STILL;
		case AIB_FOLLOW:			return AIM_FOLLOW_PATH;
		default:	Int3();	//	Contact Mike: Error, illegal behavior type
	}

	return AIM_STILL;
}

// ---------------------------------------------------------------------------------------------------------------------
//	Call every time the player starts a new ship.
void ai_init_boss_for_ship(void)
{
	Boss_hit_time = -F1_0*10;

}

// ---------------------------------------------------------------------------------------------------------------------
//	initial_mode == -1 means leave mode unchanged.
void init_ai_object(int objnum, int behavior, int hide_segment)
{
	object	*objp = &Objects[objnum];
	ai_static	*aip = &objp->ctype.ai_info;
	ai_local		*ailp = &Ai_local_info[objnum];
	robot_info	*robptr = &Robot_info[objp->id];

	if (behavior == 0) {
		// mprintf((0, "Behavior of 0 for object #%i, bashing to AIB_NORMAL.\n", objnum));
		behavior = AIB_NORMAL;
		aip->behavior = behavior;
	}
	// mprintf((0, "Initializing object #%i\n", objnum));

	//	mode is now set from the Robot dialog, so this should get overwritten.
	ailp->mode = AIM_STILL;

	ailp->previous_visibility = 0;

	if (behavior != -1) {
		aip->behavior = behavior;
		ailp->mode = ai_behavior_to_mode(aip->behavior);
	} else if (!((aip->behavior >= MIN_BEHAVIOR) && (aip->behavior <= MAX_BEHAVIOR))) {
		mprintf((0, "[obj %i -> normal] ", objnum));
		aip->behavior = AIB_NORMAL;
	}

	if (robptr->companion) {
		ailp->mode = AIM_GOTO_PLAYER;
		Escort_kill_object = -1;
	}

	if (robptr->thief) {
		aip->behavior = AIB_SNIPE;
		ailp->mode = AIM_THIEF_WAIT;
	}

	if (robptr->attack_type) {
		aip->behavior = AIB_NORMAL;
		ailp->mode = ai_behavior_to_mode(aip->behavior);
	}

	// This is astonishingly stupid!  This routine gets called by matcens! KILL KILL KILL!!! Point_segs_free_ptr = Point_segs;

	vm_vec_zero(&objp->mtype.phys_info.velocity);
	// -- ailp->wait_time = F1_0*5;
	ailp->player_awareness_time = 0;
	ailp->player_awareness_type = 0;
	aip->GOAL_STATE = AIS_SRCH;
	aip->CURRENT_STATE = AIS_REST;
	ailp->time_player_seen = GameTime;
	ailp->next_misc_sound_time = GameTime;
	ailp->time_player_sound_attacked = GameTime;

	if ((behavior == AIB_SNIPE) || (behavior == AIB_STATION) || (behavior == AIB_RUN_FROM) || (behavior == AIB_FOLLOW)) {
		aip->hide_segment = hide_segment;
		ailp->goal_segment = hide_segment;
		aip->hide_index = -1;			// This means the path has not yet been created.
		aip->cur_path_index = 0;
	}

	aip->SKIP_AI_COUNT = 0;

	if (robptr->cloak_type == RI_CLOAKED_ALWAYS)
		aip->CLOAKED = 1;
	else
		aip->CLOAKED = 0;

	objp->mtype.phys_info.flags |= (PF_BOUNCE | PF_TURNROLL);

	aip->REMOTE_OWNER = -1;

	aip->dying_sound_playing = 0;
	aip->dying_start_time = 0;

}


extern object * create_morph_robot( segment *segp, vms_vector *object_pos, int object_id);

// --------------------------------------------------------------------------------------------------------------------
//	Create a Buddy bot.
//	This automatically happens when you bring up the Buddy menu in a debug version.
//	It is available as a cheat in a non-debug (release) version.
void create_buddy_bot(void)
{
	int	buddy_id;
	vms_vector	object_pos;

	for (buddy_id=0; buddy_id<N_robot_types; buddy_id++)
		if (Robot_info[buddy_id].companion)
			break;

	if (buddy_id == N_robot_types) {
		mprintf((0, "Can't create Buddy.  No 'companion' bot found in Robot_info!\n"));
		return;
	}

	compute_segment_center(&object_pos, &Segments[ConsoleObject->segnum]);

	create_morph_robot( &Segments[ConsoleObject->segnum], &object_pos, buddy_id);
}

#define	QUEUE_SIZE	256

// --------------------------------------------------------------------------------------------------------------------
//	Create list of segments boss is allowed to teleport to at segptr.
//	Set *num_segs.
//	Boss is allowed to teleport to segments he fits in (calls object_intersects_wall) and
//	he can reach from his initial position (calls find_connected_distance).
//	If size_check is set, then only add segment if boss can fit in it, else any segment is legal.
//	one_wall_hack added by MK, 10/13/95: A mega-hack!  Set to !0 to ignore the
void init_boss_segments(short segptr[], int *num_segs, int size_check, int one_wall_hack)
{
	int			boss_objnum=-1;
	int			i;

	*num_segs = 0;
#ifdef EDITOR
	N_selected_segs = 0;
#endif


if (size_check)
	mprintf((0, "Boss fits in segments:\n"));
	//	See if there is a boss.  If not, quick out.
	for (i=0; i<=Highest_object_index; i++)
		if ((Objects[i].type == OBJ_ROBOT) && (Robot_info[Objects[i].id].boss_flag)) {
			if (boss_objnum != -1)		//	There are two bosses in this mine!  i and boss_objnum!
				Int3();			//do int3 here instead of assert so museum will work
			boss_objnum = i;
		}

	if (boss_objnum != -1) {
		int			original_boss_seg;
		vms_vector	original_boss_pos;
		object		*boss_objp = &Objects[boss_objnum];
		int			head, tail;
		int			seg_queue[QUEUE_SIZE];
//ALREADY IN RENDER.H		byte			visited[MAX_SEGMENTS];
		fix			boss_size_save;

		boss_size_save = boss_objp->size;
		// -- Causes problems!!	-- boss_objp->size = fixmul((F1_0/4)*3, boss_objp->size);
		original_boss_seg = boss_objp->segnum;
		original_boss_pos = boss_objp->pos;
		head = 0;
		tail = 0;
		seg_queue[head++] = original_boss_seg;

		segptr[(*num_segs)++] = original_boss_seg;
		mprintf((0, "%4i ", original_boss_seg));
		#ifdef EDITOR
		Selected_segs[N_selected_segs++] = original_boss_seg;
		#endif

		for (i=0; i<=Highest_segment_index; i++)
			visited[i] = 0;

		while (tail != head) {
			int		sidenum;
			segment	*segp = &Segments[seg_queue[tail++]];

			tail &= QUEUE_SIZE-1;

			for (sidenum=0; sidenum<MAX_SIDES_PER_SEGMENT; sidenum++) {
				int	w;

				if (((w = WALL_IS_DOORWAY(segp, sidenum)) & WID_FLY_FLAG) || one_wall_hack) {
					//	If we get here and w == WID_WALL, then we want to process through this wall, else not.
					if (IS_CHILD(segp->children[sidenum])) {
						if (one_wall_hack)
							one_wall_hack--;
					} else
						continue;

					if (visited[segp->children[sidenum]] == 0) {
						seg_queue[head++] = segp->children[sidenum];
						visited[segp->children[sidenum]] = 1;
						head &= QUEUE_SIZE-1;
						if (head > tail) {
							if (head == tail + QUEUE_SIZE-1)
								Int3();	//	queue overflow.  Make it bigger!
						} else
							if (head+QUEUE_SIZE == tail + QUEUE_SIZE-1)
								Int3();	//	queue overflow.  Make it bigger!

						if ((!size_check) || boss_fits_in_seg(boss_objp, segp->children[sidenum])) {
							segptr[(*num_segs)++] = segp->children[sidenum];
							if (size_check) mprintf((0, "%4i ", segp->children[sidenum]));
							#ifdef EDITOR
							Selected_segs[N_selected_segs++] = segp->children[sidenum];
							#endif
							if (*num_segs >= MAX_BOSS_TELEPORT_SEGS) {
								mprintf((1, "Warning: Too many boss teleport segments.  Found %i after searching %i/%i segments.\n", MAX_BOSS_TELEPORT_SEGS, segp->children[sidenum], Highest_segment_index+1));
								tail = head;
							}
						}
					}
				}
			}

		}

		boss_objp->size = boss_size_save;
		boss_objp->pos = original_boss_pos;
		obj_relink(boss_objnum, original_boss_seg);

	}

}

extern void init_buddy_for_level(void);

// ---------------------------------------------------------------------------------------------------------------------
void init_ai_objects(void)
{
	int	i;

	Point_segs_free_ptr = Point_segs;

	for (i=0; i<MAX_OBJECTS; i++) {
		object *objp = &Objects[i];

		if (objp->control_type == CT_AI)
			init_ai_object(i, objp->ctype.ai_info.behavior, objp->ctype.ai_info.hide_segment);
	}

	init_boss_segments(Boss_gate_segs, &Num_boss_gate_segs, 0, 0);

	init_boss_segments(Boss_teleport_segs, &Num_boss_teleport_segs, 1, 0);
	if (Num_boss_teleport_segs == 1)
		init_boss_segments(Boss_teleport_segs, &Num_boss_teleport_segs, 1, 1);

	Boss_dying_sound_playing = 0;
	Boss_dying = 0;
	// -- unused! MK, 10/21/95 -- Boss_been_hit = 0;
	Gate_interval = F1_0*4 - Difficulty_level*i2f(2)/3;

	Ai_initialized = 1;

	ai_do_cloak_stuff();

	init_buddy_for_level();

	if (Current_level_num == Last_level) {
		Boss_teleport_interval = F1_0*10;
		Boss_cloak_interval = F1_0*15;					//	Time between cloaks
	} else {
		Boss_teleport_interval = F1_0*7;
		Boss_cloak_interval = F1_0*10;					//	Time between cloaks
	}
}

int	Lunacy = 0;
int	Diff_save = 1;

fix	Firing_wait_copy[MAX_ROBOT_TYPES];
fix	Firing_wait2_copy[MAX_ROBOT_TYPES];
byte	Rapidfire_count_copy[MAX_ROBOT_TYPES];

void do_lunacy_on(void)
{
	int	i;

	if (Lunacy)	//already on
		return;

	Lunacy = 1;

	Diff_save = Difficulty_level;
	Difficulty_level = NDL-1;

	for (i=0; i<MAX_ROBOT_TYPES; i++) {
		Firing_wait_copy[i] = Robot_info[i].firing_wait[NDL-1];
		Firing_wait2_copy[i] = Robot_info[i].firing_wait2[NDL-1];
		Rapidfire_count_copy[i] = Robot_info[i].rapidfire_count[NDL-1];

		Robot_info[i].firing_wait[NDL-1] = Robot_info[i].firing_wait[1];
		Robot_info[i].firing_wait2[NDL-1] = Robot_info[i].firing_wait2[1];
		Robot_info[i].rapidfire_count[NDL-1] = Robot_info[i].rapidfire_count[1];
	}

}

void do_lunacy_off(void)
{
	int	i;

	if (!Lunacy)	//already off
		return;

	Lunacy = 0;

	for (i=0; i<MAX_ROBOT_TYPES; i++) {
		Robot_info[i].firing_wait[NDL-1] = Firing_wait_copy[i];
		Robot_info[i].firing_wait2[NDL-1] = Firing_wait2_copy[i];
		Robot_info[i].rapidfire_count[NDL-1] = Rapidfire_count_copy[i];
	}

	Difficulty_level = Diff_save;
}

//	----------------------------------------------------------------
//	Do *dest = *delta unless:
//				*delta is pretty small
//		and	they are of different signs.
void set_rotvel_and_saturate(fix *dest, fix delta)
{
	if ((delta ^ *dest) < 0) {
		if (abs(delta) < F1_0/8) {
			// mprintf((0, "D"));
			*dest = delta/4;
		} else
			// mprintf((0, "d"));
			*dest = delta;
	} else {
		// mprintf((0, "!"));
		*dest = delta;
	}
}

//--debug-- #ifndef NDEBUG
//--debug-- int	Total_turns=0;
//--debug-- int	Prevented_turns=0;
//--debug-- #endif

#define	AI_TURN_SCALE	1
#define	BABY_SPIDER_ID	14
#define	FIRE_AT_NEARBY_PLAYER_THRESHOLD	(F1_0*40)

extern void physics_turn_towards_vector(vms_vector *goal_vector, object *obj, fix rate);
extern fix Seismic_tremor_magnitude;

//-------------------------------------------------------------------------------------------
void ai_turn_towards_vector(vms_vector *goal_vector, object *objp, fix rate)
{
	vms_vector	new_fvec;
	fix			dot;

	//	Not all robots can turn, eg, SPECIAL_REACTOR_ROBOT
	if (rate == 0)
		return;

	if ((objp->id == BABY_SPIDER_ID) && (objp->type == OBJ_ROBOT)) {
		physics_turn_towards_vector(goal_vector, objp, rate);
		return;
	}

	new_fvec = *goal_vector;

	dot = vm_vec_dot(goal_vector, &objp->orient.fvec);

	if (dot < (F1_0 - FrameTime/2)) {
		fix	mag;
		fix	new_scale = fixdiv(FrameTime * AI_TURN_SCALE, rate);
		vm_vec_scale(&new_fvec, new_scale);
		vm_vec_add2(&new_fvec, &objp->orient.fvec);
		mag = vm_vec_normalize_quick(&new_fvec);
		if (mag < F1_0/256) {
			mprintf((1, "Degenerate vector in ai_turn_towards_vector (mag = %7.3f)\n", f2fl(mag)));
			new_fvec = *goal_vector;		//	if degenerate vector, go right to goal
		}
	}

	if (Seismic_tremor_magnitude) {
		vms_vector	rand_vec;
		fix			scale;
		make_random_vector(&rand_vec);
		scale = fixdiv(2*Seismic_tremor_magnitude, Robot_info[objp->id].mass);
		vm_vec_scale_add2(&new_fvec, &rand_vec, scale);
	}

	vm_vector_2_matrix(&objp->orient, &new_fvec, NULL, &objp->orient.rvec);
}

// -- unused, 08/07/95 -- // --------------------------------------------------------------------------------------------------------------------
// -- unused, 08/07/95 -- void ai_turn_randomly(vms_vector *vec_to_player, object *obj, fix rate, int previous_visibility)
// -- unused, 08/07/95 -- {
// -- unused, 08/07/95 -- 	vms_vector	curvec;
// -- unused, 08/07/95 --
// -- unused, 08/07/95 -- // -- MK, 06/09/95	//	Random turning looks too stupid, so 1/4 of time, cheat.
// -- unused, 08/07/95 -- // -- MK, 06/09/95	if (previous_visibility)
// -- unused, 08/07/95 -- // -- MK, 06/09/95		if (d_rand() > 0x7400) {
// -- unused, 08/07/95 -- // -- MK, 06/09/95			ai_turn_towards_vector(vec_to_player, obj, rate);
// -- unused, 08/07/95 -- // -- MK, 06/09/95			return;
// -- unused, 08/07/95 -- // -- MK, 06/09/95		}
// -- unused, 08/07/95 --
// -- unused, 08/07/95 -- 	curvec = obj->mtype.phys_info.rotvel;
// -- unused, 08/07/95 --
// -- unused, 08/07/95 -- 	curvec.y += F1_0/64;
// -- unused, 08/07/95 --
// -- unused, 08/07/95 -- 	curvec.x += curvec.y/6;
// -- unused, 08/07/95 -- 	curvec.y += curvec.z/4;
// -- unused, 08/07/95 -- 	curvec.z += curvec.x/10;
// -- unused, 08/07/95 --
// -- unused, 08/07/95 -- 	if (abs(curvec.x) > F1_0/8) curvec.x /= 4;
// -- unused, 08/07/95 -- 	if (abs(curvec.y) > F1_0/8) curvec.y /= 4;
// -- unused, 08/07/95 -- 	if (abs(curvec.z) > F1_0/8) curvec.z /= 4;
// -- unused, 08/07/95 --
// -- unused, 08/07/95 -- 	obj->mtype.phys_info.rotvel = curvec;
// -- unused, 08/07/95 --
// -- unused, 08/07/95 -- }

//	Overall_agitation affects:
//		Widens field of view.  Field of view is in range 0..1 (specified in bitmaps.tbl as N/360 degrees).
//			Overall_agitation/128 subtracted from field of view, making robots see wider.
//		Increases distance to which robot will search to create path to player by Overall_agitation/8 segments.
//		Decreases wait between fire times by Overall_agitation/64 seconds.


// --------------------------------------------------------------------------------------------------------------------
//	Returns:
//		0		Player is not visible from object, obstruction or something.
//		1		Player is visible, but not in field of view.
//		2		Player is visible and in field of view.
//	Note: Uses Believed_player_pos as player's position for cloak effect.
//	NOTE: Will destructively modify *pos if *pos is outside the mine.
int player_is_visible_from_object(object *objp, vms_vector *pos, fix field_of_view, vms_vector *vec_to_player)
{
	fix			dot;
	fvi_query	fq;

	//	Assume that robot's gun tip is in same segment as robot's center.
	objp->ctype.ai_info.SUB_FLAGS &= ~SUB_FLAGS_GUNSEG;

	fq.p0						= pos;
	if ((pos->x != objp->pos.x) || (pos->y != objp->pos.y) || (pos->z != objp->pos.z)) {
		int	segnum = find_point_seg(pos, objp->segnum);
		if (segnum == -1) {
			fq.startseg = objp->segnum;
			*pos = objp->pos;
			mprintf((1, "Object %i, gun is outside mine, moving towards center.\n", objp-Objects));
			move_towards_segment_center(objp);
		} else {
			if (segnum != objp->segnum) {
				// -- mprintf((0, "Warning: Robot's gun tip not in same segment as robot center, frame %i.\n", FrameCount));
				objp->ctype.ai_info.SUB_FLAGS |= SUB_FLAGS_GUNSEG;
			}
			fq.startseg = segnum;
		}
	} else
		fq.startseg			= objp->segnum;
	fq.p1						= &Believed_player_pos;
	fq.rad					= F1_0/4;
	fq.thisobjnum			= objp-Objects;
	fq.ignore_obj_list	= NULL;
	fq.flags					= FQ_TRANSWALL; // -- Why were we checking objects? | FQ_CHECK_OBJS;		//what about trans walls???

	Hit_type = find_vector_intersection(&fq,&Hit_data);

	Hit_pos = Hit_data.hit_pnt;
	Hit_seg = Hit_data.hit_seg;

	// -- when we stupidly checked objects -- if ((Hit_type == HIT_NONE) || ((Hit_type == HIT_OBJECT) && (Hit_data.hit_object == Players[Player_num].objnum))) {
	if (Hit_type == HIT_NONE) {
		dot = vm_vec_dot(vec_to_player, &objp->orient.fvec);
		// mprintf((0, "Fvec = [%5.2f %5.2f %5.2f], vec_to_player = [%5.2f %5.2f %5.2f], dot = %7.3f\n", f2fl(objp->orient.fvec.x), f2fl(objp->orient.fvec.y), f2fl(objp->orient.fvec.z), f2fl(vec_to_player->x), f2fl(vec_to_player->y), f2fl(vec_to_player->z), f2fl(dot)));
		if (dot > field_of_view - (Overall_agitation << 9)) {
			return 2;
		} else {
			return 1;
		}
	} else {
		return 0;
	}
}

// ------------------------------------------------------------------------------------------------------------------
//	Return 1 if animates, else return 0
int do_silly_animation(object *objp)
{
	int				objnum = objp-Objects;
	jointpos 		*jp_list;
	int				robot_type, gun_num, robot_state, num_joint_positions;
	polyobj_info	*pobj_info = &objp->rtype.pobj_info;
	ai_static		*aip = &objp->ctype.ai_info;
	// ai_local			*ailp = &Ai_local_info[objnum];
	int				num_guns, at_goal;
	int				attack_type;
	int				flinch_attack_scale = 1;

	robot_type = objp->id;
	num_guns = Robot_info[robot_type].n_guns;
	attack_type = Robot_info[robot_type].attack_type;

	if (num_guns == 0) {
		// mprintf((0, "Object #%i of type #%i has 0 guns.\n", objp-Objects, robot_type));
		return 0;
	}

	//	This is a hack.  All positions should be based on goal_state, not GOAL_STATE.
	robot_state = Mike_to_matt_xlate[aip->GOAL_STATE];
	// previous_robot_state = Mike_to_matt_xlate[aip->CURRENT_STATE];

	if (attack_type) // && ((robot_state == AS_FIRE) || (robot_state == AS_RECOIL)))
		flinch_attack_scale = Attack_scale;
	else if ((robot_state == AS_FLINCH) || (robot_state == AS_RECOIL))
		flinch_attack_scale = Flinch_scale;

	at_goal = 1;
	for (gun_num=0; gun_num <= num_guns; gun_num++) {
		int	joint;

		num_joint_positions = robot_get_anim_state(&jp_list, robot_type, gun_num, robot_state);

		for (joint=0; joint<num_joint_positions; joint++) {
			fix			delta_angle, delta_2;
			int			jointnum = jp_list[joint].jointnum;
			vms_angvec	*jp = &jp_list[joint].angles;
			vms_angvec	*pobjp = &pobj_info->anim_angles[jointnum];

			if (jointnum >= Polygon_models[objp->rtype.pobj_info.model_num].n_models) {
				Int3();		// Contact Mike: incompatible data, illegal jointnum, problem in pof file?
				continue;
			}
			if (jp->p != pobjp->p) {
				if (gun_num == 0)
					at_goal = 0;
				Ai_local_info[objnum].goal_angles[jointnum].p = jp->p;

				delta_angle = jp->p - pobjp->p;
				if (delta_angle >= F1_0/2)
					delta_2 = -ANIM_RATE;
				else if (delta_angle >= 0)
					delta_2 = ANIM_RATE;
				else if (delta_angle >= -F1_0/2)
					delta_2 = -ANIM_RATE;
				else
					delta_2 = ANIM_RATE;

				if (flinch_attack_scale != 1)
					delta_2 *= flinch_attack_scale;

				Ai_local_info[objnum].delta_angles[jointnum].p = delta_2/DELTA_ANG_SCALE;		// complete revolutions per second
			}

			if (jp->b != pobjp->b) {
				if (gun_num == 0)
					at_goal = 0;
				Ai_local_info[objnum].goal_angles[jointnum].b = jp->b;

				delta_angle = jp->b - pobjp->b;
				if (delta_angle >= F1_0/2)
					delta_2 = -ANIM_RATE;
				else if (delta_angle >= 0)
					delta_2 = ANIM_RATE;
				else if (delta_angle >= -F1_0/2)
					delta_2 = -ANIM_RATE;
				else
					delta_2 = ANIM_RATE;

				if (flinch_attack_scale != 1)
					delta_2 *= flinch_attack_scale;

				Ai_local_info[objnum].delta_angles[jointnum].b = delta_2/DELTA_ANG_SCALE;		// complete revolutions per second
			}

			if (jp->h != pobjp->h) {
				if (gun_num == 0)
					at_goal = 0;
				Ai_local_info[objnum].goal_angles[jointnum].h = jp->h;

				delta_angle = jp->h - pobjp->h;
				if (delta_angle >= F1_0/2)
					delta_2 = -ANIM_RATE;
				else if (delta_angle >= 0)
					delta_2 = ANIM_RATE;
				else if (delta_angle >= -F1_0/2)
					delta_2 = -ANIM_RATE;
				else
					delta_2 = ANIM_RATE;

				if (flinch_attack_scale != 1)
					delta_2 *= flinch_attack_scale;

				Ai_local_info[objnum].delta_angles[jointnum].h = delta_2/DELTA_ANG_SCALE;		// complete revolutions per second
			}
		}

		if (at_goal) {
			//ai_static	*aip = &objp->ctype.ai_info;
			ai_local		*ailp = &Ai_local_info[objp-Objects];
			ailp->achieved_state[gun_num] = ailp->goal_state[gun_num];
			if (ailp->achieved_state[gun_num] == AIS_RECO)
				ailp->goal_state[gun_num] = AIS_FIRE;

			if (ailp->achieved_state[gun_num] == AIS_FLIN)
				ailp->goal_state[gun_num] = AIS_LOCK;

		}
	}

	if (at_goal == 1) //num_guns)
		aip->CURRENT_STATE = aip->GOAL_STATE;

	return 1;
}

//	------------------------------------------------------------------------------------------
//	Move all sub-objects in an object towards their goals.
//	Current orientation of object is at:	pobj_info.anim_angles
//	Goal orientation of object is at:		ai_info.goal_angles
//	Delta orientation of object is at:		ai_info.delta_angles
void ai_frame_animation(object *objp)
{
	int	objnum = objp-Objects;
	int	joint;
	int	num_joints;

	num_joints = Polygon_models[objp->rtype.pobj_info.model_num].n_models;

	for (joint=1; joint<num_joints; joint++) {
		fix			delta_to_goal;
		fix			scaled_delta_angle;
		vms_angvec	*curangp = &objp->rtype.pobj_info.anim_angles[joint];
		vms_angvec	*goalangp = &Ai_local_info[objnum].goal_angles[joint];
		vms_angvec	*deltaangp = &Ai_local_info[objnum].delta_angles[joint];

		delta_to_goal = goalangp->p - curangp->p;
		if (delta_to_goal > 32767)
			delta_to_goal = delta_to_goal - 65536;
		else if (delta_to_goal < -32767)
			delta_to_goal = 65536 + delta_to_goal;

		if (delta_to_goal) {
			scaled_delta_angle = fixmul(deltaangp->p, FrameTime) * DELTA_ANG_SCALE;
			curangp->p += scaled_delta_angle;
			if (abs(delta_to_goal) < abs(scaled_delta_angle))
				curangp->p = goalangp->p;
		}

		delta_to_goal = goalangp->b - curangp->b;
		if (delta_to_goal > 32767)
			delta_to_goal = delta_to_goal - 65536;
		else if (delta_to_goal < -32767)
			delta_to_goal = 65536 + delta_to_goal;

		if (delta_to_goal) {
			scaled_delta_angle = fixmul(deltaangp->b, FrameTime) * DELTA_ANG_SCALE;
			curangp->b += scaled_delta_angle;
			if (abs(delta_to_goal) < abs(scaled_delta_angle))
				curangp->b = goalangp->b;
		}

		delta_to_goal = goalangp->h - curangp->h;
		if (delta_to_goal > 32767)
			delta_to_goal = delta_to_goal - 65536;
		else if (delta_to_goal < -32767)
			delta_to_goal = 65536 + delta_to_goal;

		if (delta_to_goal) {
			scaled_delta_angle = fixmul(deltaangp->h, FrameTime) * DELTA_ANG_SCALE;
			curangp->h += scaled_delta_angle;
			if (abs(delta_to_goal) < abs(scaled_delta_angle))
				curangp->h = goalangp->h;
		}

	}

}

// ----------------------------------------------------------------------------------
void set_next_fire_time(object *objp, ai_local *ailp, robot_info *robptr, int gun_num)
{
	//	For guys in snipe mode, they have a 50% shot of getting this shot in free.
	if ((gun_num != 0) || (robptr->weapon_type2 == -1))
		if ((objp->ctype.ai_info.behavior != AIB_SNIPE) || (d_rand() > 16384))
			ailp->rapidfire_count++;

	//	Old way, 10/15/95: Continuous rapidfire if rapidfire_count set.
// -- 	if (((robptr->weapon_type2 == -1) || (gun_num != 0)) && (ailp->rapidfire_count < robptr->rapidfire_count[Difficulty_level])) {
// -- 		ailp->next_fire = min(F1_0/8, robptr->firing_wait[Difficulty_level]/2);
// -- 	} else {
// -- 		if ((robptr->weapon_type2 == -1) || (gun_num != 0)) {
// -- 			ailp->rapidfire_count = 0;
// -- 			ailp->next_fire = robptr->firing_wait[Difficulty_level];
// -- 		} else
// -- 			ailp->next_fire2 = robptr->firing_wait2[Difficulty_level];
// -- 	}

	if (((gun_num != 0) || (robptr->weapon_type2 == -1)) && (ailp->rapidfire_count < robptr->rapidfire_count[Difficulty_level])) {
		ailp->next_fire = min(F1_0/8, robptr->firing_wait[Difficulty_level]/2);
	} else {
		if ((robptr->weapon_type2 == -1) || (gun_num != 0)) {
			ailp->next_fire = robptr->firing_wait[Difficulty_level];
			if (ailp->rapidfire_count >= robptr->rapidfire_count[Difficulty_level])
				ailp->rapidfire_count = 0;
		} else
			ailp->next_fire2 = robptr->firing_wait2[Difficulty_level];
	}
}

// ----------------------------------------------------------------------------------
//	When some robots collide with the player, they attack.
//	If player is cloaked, then robot probably didn't actually collide, deal with that here.
void do_ai_robot_hit_attack(object *robot, object *playerobj, vms_vector *collision_point)
{
	ai_local		*ailp = &Ai_local_info[robot-Objects];
	robot_info *robptr = &Robot_info[robot->id];

//#ifndef NDEBUG
	if (!Robot_firing_enabled)
		return;
//#endif

	//	If player is dead, stop firing.
	if (Objects[Players[Player_num].objnum].type == OBJ_GHOST)
		return;

	if (robptr->attack_type == 1) {
		if (ailp->next_fire <= 0) {
			if (!(Players[Player_num].flags & PLAYER_FLAGS_CLOAKED))
				if (vm_vec_dist_quick(&ConsoleObject->pos, &robot->pos) < robot->size + ConsoleObject->size + F1_0*2) {
					collide_player_and_nasty_robot( playerobj, robot, collision_point );
					if (robptr->energy_drain && Players[Player_num].energy) {
						Players[Player_num].energy -= robptr->energy_drain * F1_0;
						if (Players[Player_num].energy < 0)
							Players[Player_num].energy = 0;
						// -- unused, use claw_sound in bitmaps.tbl -- digi_link_sound_to_pos( SOUND_ROBOT_SUCKED_PLAYER, playerobj->segnum, 0, collision_point, 0, F1_0 );
					}
				}

			robot->ctype.ai_info.GOAL_STATE = AIS_RECO;
			set_next_fire_time(robot, ailp, robptr, 1);	//	1 = gun_num: 0 is special (uses next_fire2)
		}
	}

}

#ifndef _OBJECT_H
extern int Player_exploded;
#endif

#define	FIRE_K	8		//	Controls average accuracy of robot firing.  Smaller numbers make firing worse.  Being power of 2 doesn't matter.

// ====================================================================================================================

#define	MIN_LEAD_SPEED		(F1_0*4)
#define	MAX_LEAD_DISTANCE	(F1_0*200)
#define	LEAD_RANGE			(F1_0/2)

// --------------------------------------------------------------------------------------------------------------------
//	Computes point at which projectile fired by robot can hit player given positions, player vel, elapsed time
fix compute_lead_component(fix player_pos, fix robot_pos, fix player_vel, fix elapsed_time)
{
	return fixdiv(player_pos - robot_pos, elapsed_time) + player_vel;
}

// --------------------------------------------------------------------------------------------------------------------
//	Lead the player, returning point to fire at in fire_point.
//	Rules:
//		Player not cloaked
//		Player must be moving at a speed >= MIN_LEAD_SPEED
//		Player not farther away than MAX_LEAD_DISTANCE
//		dot(vector_to_player, player_direction) must be in -LEAD_RANGE..LEAD_RANGE
//		if firing a matter weapon, less leading, based on skill level.
int lead_player(object *objp, vms_vector *fire_point, vms_vector *believed_player_pos, int gun_num, vms_vector *fire_vec)
{
	fix			dot, player_speed, dist_to_player, max_weapon_speed, projected_time;
	vms_vector	player_movement_dir, vec_to_player;
	int			weapon_type;
	weapon_info	*wptr;
	robot_info	*robptr;

	if (Players[Player_num].flags & PLAYER_FLAGS_CLOAKED)
		return 0;

	player_movement_dir = ConsoleObject->mtype.phys_info.velocity;
	player_speed = vm_vec_normalize_quick(&player_movement_dir);

	if (player_speed < MIN_LEAD_SPEED)
		return 0;

	vm_vec_sub(&vec_to_player, believed_player_pos, fire_point);
	dist_to_player = vm_vec_normalize_quick(&vec_to_player);
	if (dist_to_player > MAX_LEAD_DISTANCE)
		return 0;

	dot = vm_vec_dot(&vec_to_player, &player_movement_dir);

	if ((dot < -LEAD_RANGE) || (dot > LEAD_RANGE))
		return 0;

	//	Looks like it might be worth trying to lead the player.
	robptr = &Robot_info[objp->id];
	weapon_type = robptr->weapon_type;
	if (robptr->weapon_type2 != -1)
		if (gun_num == 0)
			weapon_type = robptr->weapon_type2;

	wptr = &Weapon_info[weapon_type];
	max_weapon_speed = wptr->speed[Difficulty_level];
	if (max_weapon_speed < F1_0)
		return 0;

	//	Matter weapons:
	//	At Rookie or Trainee, don't lead at all.
	//	At higher skill levels, don't lead as well.  Accomplish this by screwing up max_weapon_speed.
	if (wptr->matter)
	{
		if (Difficulty_level <= 1)
			return 0;
		else
			max_weapon_speed *= (NDL-Difficulty_level);
	}

	projected_time = fixdiv(dist_to_player, max_weapon_speed);

	fire_vec->x = compute_lead_component(believed_player_pos->x, fire_point->x, ConsoleObject->mtype.phys_info.velocity.x, projected_time);
	fire_vec->y = compute_lead_component(believed_player_pos->y, fire_point->y, ConsoleObject->mtype.phys_info.velocity.y, projected_time);
	fire_vec->z = compute_lead_component(believed_player_pos->z, fire_point->z, ConsoleObject->mtype.phys_info.velocity.z, projected_time);

	vm_vec_normalize_quick(fire_vec);

	Assert(vm_vec_dot(fire_vec, &objp->orient.fvec) < 3*F1_0/2);

	//	Make sure not firing at especially strange angle.  If so, try to correct.  If still bad, give up after one try.
	if (vm_vec_dot(fire_vec, &objp->orient.fvec) < F1_0/2) {
		vm_vec_add2(fire_vec, &vec_to_player);
		vm_vec_scale(fire_vec, F1_0/2);
		if (vm_vec_dot(fire_vec, &objp->orient.fvec) < F1_0/2) {
			return 0;
		}
	}

	return 1;
}

// --------------------------------------------------------------------------------------------------------------------
//	Note: Parameter vec_to_player is only passed now because guns which aren't on the forward vector from the
//	center of the robot will not fire right at the player.  We need to aim the guns at the player.  Barring that, we cheat.
//	When this routine is complete, the parameter vec_to_player should not be necessary.
void ai_fire_laser_at_player(object *obj, vms_vector *fire_point, int gun_num, vms_vector *believed_player_pos)
{
	int			objnum = obj-Objects;
	ai_local		*ailp = &Ai_local_info[objnum];
	robot_info	*robptr = &Robot_info[obj->id];
	vms_vector	fire_vec;
	vms_vector	bpp_diff;
	int			weapon_type;
	fix			aim, dot;
	int			count;

	Assert(robptr->attack_type == 0);	//	We should never be coming here for the green guy, as he has no laser!

	//	If this robot is only awake because a camera woke it up, don't fire.
	if (obj->ctype.ai_info.SUB_FLAGS & SUB_FLAGS_CAMERA_AWAKE)
		return;

	if (!Robot_firing_enabled)
		return;

	if (obj->control_type == CT_MORPH)
		return;

	//	If player is exploded, stop firing.
	if (Player_exploded)
		return;

	if (obj->ctype.ai_info.dying_start_time)
		return;		//	No firing while in death roll.

	//	Don't let the boss fire while in death roll.  Sorry, this is the easiest way to do this.
	//	If you try to key the boss off obj->ctype.ai_info.dying_start_time, it will hose the endlevel stuff.
	if (Boss_dying_start_time & Robot_info[obj->id].boss_flag)
		return;

	//	If player is cloaked, maybe don't fire based on how long cloaked and randomness.
	if (Players[Player_num].flags & PLAYER_FLAGS_CLOAKED) {
		fix	cloak_time = Ai_cloak_info[objnum % MAX_AI_CLOAK_INFO].last_time;

		if (GameTime - cloak_time > CLOAK_TIME_MAX/4)
			if (d_rand() > fixdiv(GameTime - cloak_time, CLOAK_TIME_MAX)/2) {
				set_next_fire_time(obj, ailp, robptr, gun_num);
				return;
			}
	}

	//	Handle problem of a robot firing through a wall because its gun tip is on the other
	//	side of the wall than the robot's center.  For speed reasons, we normally only compute
	//	the vector from the gun point to the player.  But we need to know whether the gun point
	//	is separated from the robot's center by a wall.  If so, don't fire!
	if (obj->ctype.ai_info.SUB_FLAGS & SUB_FLAGS_GUNSEG) {
		//	Well, the gun point is in a different segment than the robot's center.
		//	This is almost always ok, but it is not ok if something solid is in between.
		int	conn_side;
		int	gun_segnum = find_point_seg(fire_point, obj->segnum);

		//	See if these segments are connected, which should almost always be the case.
		conn_side = find_connect_side(&Segments[gun_segnum], &Segments[obj->segnum]);
		if (conn_side != -1) {
			//	They are connected via conn_side in segment obj->segnum.
			//	See if they are unobstructed.
			if (!(WALL_IS_DOORWAY(&Segments[obj->segnum], conn_side) & WID_FLY_FLAG)) {
				//	Can't fly through, so don't let this bot fire through!
				return;
			}
		} else {
			//	Well, they are not directly connected, so use find_vector_intersection to see if they are unobstructed.
			fvi_query	fq;
			fvi_info		hit_data;
			int			fate;

			fq.startseg				= obj->segnum;
			fq.p0						= &obj->pos;
			fq.p1						= fire_point;
			fq.rad					= 0;
			fq.thisobjnum			= obj-Objects;
			fq.ignore_obj_list	= NULL;
			fq.flags					= FQ_TRANSWALL;

			fate = find_vector_intersection(&fq, &hit_data);
			if (fate != HIT_NONE) {
				Int3();		//	This bot's gun is poking through a wall, so don't fire.
				move_towards_segment_center(obj);		//	And decrease chances it will happen again.
				return;
			}
		}
	}

	// -- mprintf((0, "Firing from gun #%i at time = %7.3f\n", gun_num, f2fl(GameTime)));

	//	Set position to fire at based on difficulty level and robot's aiming ability
	aim = FIRE_K*F1_0 - (FIRE_K-1)*(robptr->aim << 8);	//	F1_0 in bitmaps.tbl = same as used to be.  Worst is 50% more error.

	//	Robots aim more poorly during seismic disturbance.
	if (Seismic_tremor_magnitude) {
		fix	temp;

		temp = F1_0 - abs(Seismic_tremor_magnitude);
		if (temp < F1_0/2)
			temp = F1_0/2;

		aim = fixmul(aim, temp);
	}

	//	Lead the player half the time.
	//	Note that when leading the player, aim is perfect.  This is probably acceptable since leading is so hacked in.
	//	Problem is all robots will lead equally badly.
	if (d_rand() < 16384) {
		if (lead_player(obj, fire_point, believed_player_pos, gun_num, &fire_vec))		//	Stuff direction to fire at in fire_point.
			goto player_led;
	}

	dot = 0;
	count = 0;			//	Don't want to sit in this loop forever...
	while ((count < 4) && (dot < F1_0/4)) {
		bpp_diff.x = believed_player_pos->x + fixmul((d_rand()-16384) * (NDL-Difficulty_level-1) * 4, aim);
		bpp_diff.y = believed_player_pos->y + fixmul((d_rand()-16384) * (NDL-Difficulty_level-1) * 4, aim);
		bpp_diff.z = believed_player_pos->z + fixmul((d_rand()-16384) * (NDL-Difficulty_level-1) * 4, aim);

		vm_vec_normalized_dir_quick(&fire_vec, &bpp_diff, fire_point);
		dot = vm_vec_dot(&obj->orient.fvec, &fire_vec);
		count++;
	}
player_led: ;

	weapon_type = robptr->weapon_type;
	if (robptr->weapon_type2 != -1)
		if (gun_num == 0)
			weapon_type = robptr->weapon_type2;

	Laser_create_new_easy( &fire_vec, fire_point, obj-Objects, weapon_type, 1);

#ifdef NETWORK
	if (Game_mode & GM_MULTI) {
		ai_multi_send_robot_position(objnum, -1);
		multi_send_robot_fire(objnum, obj->ctype.ai_info.CURRENT_GUN, &fire_vec);
	}
#endif

	create_awareness_event(obj, PA_NEARBY_ROBOT_FIRED);

	set_next_fire_time(obj, ailp, robptr, gun_num);

}

// --------------------------------------------------------------------------------------------------------------------
//	vec_goal must be normalized, or close to it.
//	if dot_based set, then speed is based on direction of movement relative to heading
void move_towards_vector(object *objp, vms_vector *vec_goal, int dot_based)
{
	physics_info	*pptr = &objp->mtype.phys_info;
	fix				speed, dot, max_speed;
	robot_info		*robptr = &Robot_info[objp->id];
	vms_vector		vel;

	//	Trying to move towards player.  If forward vector much different than velocity vector,
	//	bash velocity vector twice as much towards player as usual.

	vel = pptr->velocity;
	vm_vec_normalize_quick(&vel);
	dot = vm_vec_dot(&vel, &objp->orient.fvec);

	if (robptr->thief)
		dot = (F1_0+dot)/2;

	if (dot_based && (dot < 3*F1_0/4)) {
		//	This funny code is supposed to slow down the robot and move his velocity towards his direction
		//	more quickly than the general code
		pptr->velocity.x = pptr->velocity.x/2 + fixmul(vec_goal->x, FrameTime*32);
		pptr->velocity.y = pptr->velocity.y/2 + fixmul(vec_goal->y, FrameTime*32);
		pptr->velocity.z = pptr->velocity.z/2 + fixmul(vec_goal->z, FrameTime*32);
	} else {
		pptr->velocity.x += fixmul(vec_goal->x, FrameTime*64) * (Difficulty_level+5)/4;
		pptr->velocity.y += fixmul(vec_goal->y, FrameTime*64) * (Difficulty_level+5)/4;
		pptr->velocity.z += fixmul(vec_goal->z, FrameTime*64) * (Difficulty_level+5)/4;
	}

	speed = vm_vec_mag_quick(&pptr->velocity);
	max_speed = robptr->max_speed[Difficulty_level];

	//	Green guy attacks twice as fast as he moves away.
	if ((robptr->attack_type == 1) || robptr->thief || robptr->kamikaze)
		max_speed *= 2;

	if (speed > max_speed) {
		pptr->velocity.x = (pptr->velocity.x*3)/4;
		pptr->velocity.y = (pptr->velocity.y*3)/4;
		pptr->velocity.z = (pptr->velocity.z*3)/4;
	}
}

// --------------------------------------------------------------------------------------------------------------------
void move_towards_player(object *objp, vms_vector *vec_to_player)
//	vec_to_player must be normalized, or close to it.
{
	move_towards_vector(objp, vec_to_player, 1);
}

// --------------------------------------------------------------------------------------------------------------------
//	I am ashamed of this: fast_flag == -1 means normal slide about.  fast_flag = 0 means no evasion.
void move_around_player(object *objp, vms_vector *vec_to_player, int fast_flag)
{
	physics_info	*pptr = &objp->mtype.phys_info;
	fix				speed;
	robot_info		*robptr = &Robot_info[objp->id];
	int				objnum = objp-Objects;
	int				dir;
	int				dir_change;
	fix				ft;
	vms_vector		evade_vector;
	int				count=0;

	if (fast_flag == 0)
		return;

	dir_change = 48;
	ft = FrameTime;
	if (ft < F1_0/32) {
		dir_change *= 8;
		count += 3;
	} else
		while (ft < F1_0/4) {
			dir_change *= 2;
			ft *= 2;
			count++;
		}

	dir = (FrameCount + (count+1) * (objnum*8 + objnum*4 + objnum)) & dir_change;
	dir >>= (4+count);

	Assert((dir >= 0) && (dir <= 3));

	switch (dir) {
		case 0:
			evade_vector.x = fixmul(vec_to_player->z, FrameTime*32);
			evade_vector.y = fixmul(vec_to_player->y, FrameTime*32);
			evade_vector.z = fixmul(-vec_to_player->x, FrameTime*32);
			break;
		case 1:
			evade_vector.x = fixmul(-vec_to_player->z, FrameTime*32);
			evade_vector.y = fixmul(vec_to_player->y, FrameTime*32);
			evade_vector.z = fixmul(vec_to_player->x, FrameTime*32);
			break;
		case 2:
			evade_vector.x = fixmul(-vec_to_player->y, FrameTime*32);
			evade_vector.y = fixmul(vec_to_player->x, FrameTime*32);
			evade_vector.z = fixmul(vec_to_player->z, FrameTime*32);
			break;
		case 3:
			evade_vector.x = fixmul(vec_to_player->y, FrameTime*32);
			evade_vector.y = fixmul(-vec_to_player->x, FrameTime*32);
			evade_vector.z = fixmul(vec_to_player->z, FrameTime*32);
			break;
		default:
			Error("Function move_around_player: Bad case.");
	}

	//	Note: -1 means normal circling about the player.  > 0 means fast evasion.
	if (fast_flag > 0) {
		fix	dot;

		//	Only take evasive action if looking at player.
		//	Evasion speed is scaled by percentage of shields left so wounded robots evade less effectively.

		dot = vm_vec_dot(vec_to_player, &objp->orient.fvec);
		if ((dot > robptr->field_of_view[Difficulty_level]) && !(ConsoleObject->flags & PLAYER_FLAGS_CLOAKED)) {
			fix	damage_scale;

			if (robptr->strength)
				damage_scale = fixdiv(objp->shields, robptr->strength);
			else
				damage_scale = F1_0;
			if (damage_scale > F1_0)
				damage_scale = F1_0;		//	Just in case...
			else if (damage_scale < 0)
				damage_scale = 0;			//	Just in case...

			vm_vec_scale(&evade_vector, i2f(fast_flag) + damage_scale);
		}
	}

	pptr->velocity.x += evade_vector.x;
	pptr->velocity.y += evade_vector.y;
	pptr->velocity.z += evade_vector.z;

	speed = vm_vec_mag_quick(&pptr->velocity);
	if ((objp-Objects != 1) && (speed > robptr->max_speed[Difficulty_level])) {
		pptr->velocity.x = (pptr->velocity.x*3)/4;
		pptr->velocity.y = (pptr->velocity.y*3)/4;
		pptr->velocity.z = (pptr->velocity.z*3)/4;
	}
}

// --------------------------------------------------------------------------------------------------------------------
void move_away_from_player(object *objp, vms_vector *vec_to_player, int attack_type)
{
	fix				speed;
	physics_info	*pptr = &objp->mtype.phys_info;
	robot_info		*robptr = &Robot_info[objp->id];
	int				objref;

	pptr->velocity.x -= fixmul(vec_to_player->x, FrameTime*16);
	pptr->velocity.y -= fixmul(vec_to_player->y, FrameTime*16);
	pptr->velocity.z -= fixmul(vec_to_player->z, FrameTime*16);

	if (attack_type) {
		//	Get value in 0..3 to choose evasion direction.
		objref = ((objp-Objects) ^ ((FrameCount + 3*(objp-Objects)) >> 5)) & 3;

		switch (objref) {
			case 0:	vm_vec_scale_add2(&pptr->velocity, &objp->orient.uvec, FrameTime << 5);	break;
			case 1:	vm_vec_scale_add2(&pptr->velocity, &objp->orient.uvec, -FrameTime << 5);	break;
			case 2:	vm_vec_scale_add2(&pptr->velocity, &objp->orient.rvec, FrameTime << 5);	break;
			case 3:	vm_vec_scale_add2(&pptr->velocity, &objp->orient.rvec, -FrameTime << 5);	break;
			default:	Int3();	//	Impossible, bogus value on objref, must be in 0..3
		}
	}


	speed = vm_vec_mag_quick(&pptr->velocity);

	if (speed > robptr->max_speed[Difficulty_level]) {
		pptr->velocity.x = (pptr->velocity.x*3)/4;
		pptr->velocity.y = (pptr->velocity.y*3)/4;
		pptr->velocity.z = (pptr->velocity.z*3)/4;
	}

}

// --------------------------------------------------------------------------------------------------------------------
//	Move towards, away_from or around player.
//	Also deals with evasion.
//	If the flag evade_only is set, then only allowed to evade, not allowed to move otherwise (must have mode == AIM_STILL).
void ai_move_relative_to_player(object *objp, ai_local *ailp, fix dist_to_player, vms_vector *vec_to_player, fix circle_distance, int evade_only, int player_visibility)
{
	object		*dobjp;
	robot_info	*robptr = &Robot_info[objp->id];

	Assert(player_visibility != -1);

	//	See if should take avoidance.

	// New way, green guys don't evade:	if ((robptr->attack_type == 0) && (objp->ctype.ai_info.danger_laser_num != -1)) {
	if (objp->ctype.ai_info.danger_laser_num != -1) {
		dobjp = &Objects[objp->ctype.ai_info.danger_laser_num];

		if ((dobjp->type == OBJ_WEAPON) && (dobjp->signature == objp->ctype.ai_info.danger_laser_signature)) {
			fix			dot, dist_to_laser, field_of_view;
			vms_vector	vec_to_laser, laser_fvec;

			field_of_view = Robot_info[objp->id].field_of_view[Difficulty_level];

			vm_vec_sub(&vec_to_laser, &dobjp->pos, &objp->pos);
			dist_to_laser = vm_vec_normalize_quick(&vec_to_laser);
			dot = vm_vec_dot(&vec_to_laser, &objp->orient.fvec);

			if ((dot > field_of_view) || (robptr->companion)) {
				fix			laser_robot_dot;
				vms_vector	laser_vec_to_robot;

				//	The laser is seen by the robot, see if it might hit the robot.
				//	Get the laser's direction.  If it's a polyobj, it can be gotten cheaply from the orientation matrix.
				if (dobjp->render_type == RT_POLYOBJ)
					laser_fvec = dobjp->orient.fvec;
				else {		//	Not a polyobj, get velocity and normalize.
					laser_fvec = dobjp->mtype.phys_info.velocity;	//dobjp->orient.fvec;
					vm_vec_normalize_quick(&laser_fvec);
				}
				vm_vec_sub(&laser_vec_to_robot, &objp->pos, &dobjp->pos);
				vm_vec_normalize_quick(&laser_vec_to_robot);
				laser_robot_dot = vm_vec_dot(&laser_fvec, &laser_vec_to_robot);

				if ((laser_robot_dot > F1_0*7/8) && (dist_to_laser < F1_0*80)) {
					int	evade_speed;

					ai_evaded = 1;
					evade_speed = Robot_info[objp->id].evade_speed[Difficulty_level];

					move_around_player(objp, vec_to_player, evade_speed);
				}
			}
			return;
		}
	}

	//	If only allowed to do evade code, then done.
	//	Hmm, perhaps brilliant insight.  If want claw-type guys to keep coming, don't return here after evasion.
	if ((!robptr->attack_type) && (!robptr->thief) && evade_only)
		return;

	//	If we fall out of above, then no object to be avoided.
	objp->ctype.ai_info.danger_laser_num = -1;

	//	Green guy selects move around/towards/away based on firing time, not distance.
	if (robptr->attack_type == 1) {
		if (((ailp->next_fire > robptr->firing_wait[Difficulty_level]/4) && (dist_to_player < F1_0*30)) || Player_is_dead) {
			//	1/4 of time, move around player, 3/4 of time, move away from player
			if (d_rand() < 8192) {
				move_around_player(objp, vec_to_player, -1);
			} else {
				move_away_from_player(objp, vec_to_player, 1);
			}
		} else {
			move_towards_player(objp, vec_to_player);
		}
	} else if (robptr->thief) {
		move_towards_player(objp, vec_to_player);
	} else {
		int	objval = ((objp-Objects) & 0x0f) ^ 0x0a;

		//	Changes here by MK, 12/29/95.  Trying to get rid of endless circling around bots in a large room.
		if (robptr->kamikaze) {
			move_towards_player(objp, vec_to_player);
		} else if (dist_to_player < circle_distance)
			move_away_from_player(objp, vec_to_player, 0);
		else if ((dist_to_player < (3+objval)*circle_distance/2) && (ailp->next_fire > -F1_0)) {
			move_around_player(objp, vec_to_player, -1);
		} else {
			if ((-ailp->next_fire > F1_0 + (objval << 12)) && player_visibility) {
				//	Usually move away, but sometimes move around player.
				if ((((GameTime >> 18) & 0x0f) ^ objval) > 4) {
					move_away_from_player(objp, vec_to_player, 0);
				} else {
					move_around_player(objp, vec_to_player, -1);
				}
			} else
				move_towards_player(objp, vec_to_player);
		}
	}

}

// --------------------------------------------------------------------------------------------------------------------
//	Compute a somewhat random, normalized vector.
void make_random_vector(vms_vector *vec)
{
	vec->x = (d_rand() - 16384) | 1;	// make sure we don't create null vector
	vec->y = d_rand() - 16384;
	vec->z = d_rand() - 16384;

	vm_vec_normalize_quick(vec);
}

#ifndef NDEBUG
void mprintf_animation_info(object *objp)
{
	ai_static	*aip = &objp->ctype.ai_info;
	ai_local		*ailp = &Ai_local_info[objp-Objects];

	if (!Ai_info_enabled)
		return;

	mprintf((0, "Goal = "));

	switch (aip->GOAL_STATE) {
		case AIS_NONE:	mprintf((0, "NONE "));	break;
		case AIS_REST:	mprintf((0, "REST "));	break;
		case AIS_SRCH:	mprintf((0, "SRCH "));	break;
		case AIS_LOCK:	mprintf((0, "LOCK "));	break;
		case AIS_FLIN:	mprintf((0, "FLIN "));	break;
		case AIS_FIRE:	mprintf((0, "FIRE "));	break;
		case AIS_RECO:	mprintf((0, "RECO "));	break;
		case AIS_ERR_:	mprintf((0, "ERR_ "));	break;

	}

	mprintf((0, " Cur = "));

	switch (aip->CURRENT_STATE) {
		case AIS_NONE:	mprintf((0, "NONE "));	break;
		case AIS_REST:	mprintf((0, "REST "));	break;
		case AIS_SRCH:	mprintf((0, "SRCH "));	break;
		case AIS_LOCK:	mprintf((0, "LOCK "));	break;
		case AIS_FLIN:	mprintf((0, "FLIN "));	break;
		case AIS_FIRE:	mprintf((0, "FIRE "));	break;
		case AIS_RECO:	mprintf((0, "RECO "));	break;
		case AIS_ERR_:	mprintf((0, "ERR_ "));	break;
	}

	mprintf((0, " Aware = "));

	switch (ailp->player_awareness_type) {
		case AIE_FIRE: mprintf((0, "FIRE ")); break;
		case AIE_HITT: mprintf((0, "HITT ")); break;
		case AIE_COLL: mprintf((0, "COLL ")); break;
		case AIE_HURT: mprintf((0, "HURT ")); break;
	}

	mprintf((0, "Next fire = %6.3f, Time = %6.3f\n", f2fl(ailp->next_fire), f2fl(ailp->player_awareness_time)));

}
#endif

//	-------------------------------------------------------------------------------------------------------------------
int	Break_on_object = -1;

void do_firing_stuff(object *obj, int player_visibility, vms_vector *vec_to_player)
{
	if ((Dist_to_last_fired_upon_player_pos < FIRE_AT_NEARBY_PLAYER_THRESHOLD ) || (player_visibility >= 1)) {
		//	Now, if in robot's field of view, lock onto player
		fix	dot = vm_vec_dot(&obj->orient.fvec, vec_to_player);
		if ((dot >= 7*F1_0/8) || (Players[Player_num].flags & PLAYER_FLAGS_CLOAKED)) {
			ai_static	*aip = &obj->ctype.ai_info;
			ai_local		*ailp = &Ai_local_info[obj-Objects];

			switch (aip->GOAL_STATE) {
				case AIS_NONE:
				case AIS_REST:
				case AIS_SRCH:
				case AIS_LOCK:
					aip->GOAL_STATE = AIS_FIRE;
					if (ailp->player_awareness_type <= PA_NEARBY_ROBOT_FIRED) {
						ailp->player_awareness_type = PA_NEARBY_ROBOT_FIRED;
						ailp->player_awareness_time = PLAYER_AWARENESS_INITIAL_TIME;
					}
					break;
			}
		} else if (dot >= F1_0/2) {
			ai_static	*aip = &obj->ctype.ai_info;
			switch (aip->GOAL_STATE) {
				case AIS_NONE:
				case AIS_REST:
				case AIS_SRCH:
					aip->GOAL_STATE = AIS_LOCK;
					break;
			}
		}
	}
}

// --------------------------------------------------------------------------------------------------------------------
//	If a hiding robot gets bumped or hit, he decides to find another hiding place.
void do_ai_robot_hit(object *objp, int type)
{
	if (objp->control_type == CT_AI) {
		if ((type == PA_WEAPON_ROBOT_COLLISION) || (type == PA_PLAYER_COLLISION))
			switch (objp->ctype.ai_info.behavior) {
				case AIB_STILL:
				{
					int	r;

					//	Attack robots (eg, green guy) shouldn't have behavior = still.
					Assert(Robot_info[objp->id].attack_type == 0);

					r = d_rand();
					//	1/8 time, charge player, 1/4 time create path, rest of time, do nothing
					if (r < 4096) {
						// -- mprintf((0, "Still guy switching to Station, creating path to player."));
						create_path_to_player(objp, 10, 1);
						objp->ctype.ai_info.behavior = AIB_STATION;
						objp->ctype.ai_info.hide_segment = objp->segnum;
						Ai_local_info[objp-Objects].mode = AIM_CHASE_OBJECT;
					} else if (r < 4096+8192) {
						// -- mprintf((0, "Still guy creating n segment path."));
						create_n_segment_path(objp, d_rand()/8192 + 2, -1);
						Ai_local_info[objp-Objects].mode = AIM_FOLLOW_PATH;
					}
					break;
				}
			}
	}

}
#ifndef NDEBUG
int	Do_ai_flag=1;
int	Cvv_test=0;
int	Cvv_last_time[MAX_OBJECTS];
int	Gun_point_hack=0;
#endif

int		Robot_sound_volume=DEFAULT_ROBOT_SOUND_VOLUME;

// --------------------------------------------------------------------------------------------------------------------
//	Note: This function could be optimized.  Surely player_is_visible_from_object would benefit from the
//	information of a normalized vec_to_player.
//	Return player visibility:
//		0		not visible
//		1		visible, but robot not looking at player (ie, on an unobstructed vector)
//		2		visible and in robot's field of view
//		-1		player is cloaked
//	If the player is cloaked, set vec_to_player based on time player cloaked and last uncloaked position.
//	Updates ailp->previous_visibility if player is not cloaked, in which case the previous visibility is left unchanged
//	and is copied to player_visibility
void compute_vis_and_vec(object *objp, vms_vector *pos, ai_local *ailp, vms_vector *vec_to_player, int *player_visibility, robot_info *robptr, int *flag)
{
	if (!*flag) {
		if (Players[Player_num].flags & PLAYER_FLAGS_CLOAKED) {
			fix			delta_time, dist;
			int			cloak_index = (objp-Objects) % MAX_AI_CLOAK_INFO;

			delta_time = GameTime - Ai_cloak_info[cloak_index].last_time;
			if (delta_time > F1_0*2) {
				vms_vector	randvec;

				Ai_cloak_info[cloak_index].last_time = GameTime;
				make_random_vector(&randvec);
				vm_vec_scale_add2(&Ai_cloak_info[cloak_index].last_position, &randvec, 8*delta_time );
			}

			dist = vm_vec_normalized_dir_quick(vec_to_player, &Ai_cloak_info[cloak_index].last_position, pos);
			*player_visibility = player_is_visible_from_object(objp, pos, robptr->field_of_view[Difficulty_level], vec_to_player);
			// *player_visibility = 2;

			if ((ailp->next_misc_sound_time < GameTime) && ((ailp->next_fire < F1_0) || (ailp->next_fire2 < F1_0)) && (dist < F1_0*20)) {
				// mprintf((0, "ANGRY! "));
				ailp->next_misc_sound_time = GameTime + (d_rand() + F1_0) * (7 - Difficulty_level) / 1;
				digi_link_sound_to_pos( robptr->see_sound, objp->segnum, 0, pos, 0 , Robot_sound_volume);
			}
		} else {
			//	Compute expensive stuff -- vec_to_player and player_visibility
			vm_vec_normalized_dir_quick(vec_to_player, &Believed_player_pos, pos);
			if ((vec_to_player->x == 0) && (vec_to_player->y == 0) && (vec_to_player->z == 0)) {
				// -- mprintf((0, "Warning: Player and robot at exactly the same location.\n"));
				vec_to_player->x = F1_0;
			}
			*player_visibility = player_is_visible_from_object(objp, pos, robptr->field_of_view[Difficulty_level], vec_to_player);

			//	This horrible code added by MK in desperation on 12/13/94 to make robots wake up as soon as they
			//	see you without killing frame rate.
			{
				ai_static	*aip = &objp->ctype.ai_info;
			if ((*player_visibility == 2) && (ailp->previous_visibility != 2))
				if ((aip->GOAL_STATE == AIS_REST) || (aip->CURRENT_STATE == AIS_REST)) {
					aip->GOAL_STATE = AIS_FIRE;
					aip->CURRENT_STATE = AIS_FIRE;
				}
			}

			if ((ailp->previous_visibility != *player_visibility) && (*player_visibility == 2)) {
				if (ailp->previous_visibility == 0) {
					if (ailp->time_player_seen + F1_0/2 < GameTime) {
						// -- mprintf((0, "SEE! "));
						// -- if (Player_exploded)
						// -- 	digi_link_sound_to_pos( robptr->taunt_sound, objp->segnum, 0, pos, 0 , Robot_sound_volume);
						// -- else
							digi_link_sound_to_pos( robptr->see_sound, objp->segnum, 0, pos, 0 , Robot_sound_volume);
						ailp->time_player_sound_attacked = GameTime;
						ailp->next_misc_sound_time = GameTime + F1_0 + d_rand()*4;
					}
				} else if (ailp->time_player_sound_attacked + F1_0/4 < GameTime) {
					// -- mprintf((0, "ANGRY! "));
					// -- if (Player_exploded)
					// -- 	digi_link_sound_to_pos( robptr->taunt_sound, objp->segnum, 0, pos, 0 , Robot_sound_volume);
					// -- else
						digi_link_sound_to_pos( robptr->attack_sound, objp->segnum, 0, pos, 0 , Robot_sound_volume);
					ailp->time_player_sound_attacked = GameTime;
				}
			}

			if ((*player_visibility == 2) && (ailp->next_misc_sound_time < GameTime)) {
				// -- mprintf((0, "ATTACK! "));
				ailp->next_misc_sound_time = GameTime + (d_rand() + F1_0) * (7 - Difficulty_level) / 2;
				// -- if (Player_exploded)
				// -- 	digi_link_sound_to_pos( robptr->taunt_sound, objp->segnum, 0, pos, 0 , Robot_sound_volume);
				// -- else
					digi_link_sound_to_pos( robptr->attack_sound, objp->segnum, 0, pos, 0 , Robot_sound_volume);
			}
			ailp->previous_visibility = *player_visibility;
		}

		*flag = 1;

		//	@mk, 09/21/95: If player view is not obstructed and awareness is at least as high as a nearby collision,
		//	act is if robot is looking at player.
		if (ailp->player_awareness_type >= PA_NEARBY_ROBOT_FIRED)
			if (*player_visibility == 1)
				*player_visibility = 2;

		if (*player_visibility) {
			ailp->time_player_seen = GameTime;
		}
	}

}

// --------------------------------------------------------------------------------------------------------------------
//	Move the object objp to a spot in which it doesn't intersect a wall.
//	It might mean moving it outside its current segment.
void move_object_to_legal_spot(object *objp)
{
	vms_vector	original_pos = objp->pos;
	int		i;
	segment	*segp = &Segments[objp->segnum];

	for (i=0; i<MAX_SIDES_PER_SEGMENT; i++) {
		if (WALL_IS_DOORWAY(segp, i) & WID_FLY_FLAG) {
			vms_vector	segment_center, goal_dir;
			fix			dist_to_center;	// Value not used so far.

			compute_segment_center(&segment_center, &Segments[segp->children[i]]);
			vm_vec_sub(&goal_dir, &segment_center, &objp->pos);
			dist_to_center = vm_vec_normalize_quick(&goal_dir);
			vm_vec_scale(&goal_dir, objp->size);
			vm_vec_add2(&objp->pos, &goal_dir);
			if (!object_intersects_wall(objp)) {
				int	new_segnum = find_point_seg(&objp->pos, objp->segnum);

				if (new_segnum != -1) {
					obj_relink(objp-Objects, new_segnum);
					return;
				}
			} else
				objp->pos = original_pos;
		}
	}

	if (Robot_info[objp->id].boss_flag) {
		Int3();		//	Note: Boss is poking outside mine.  Will try to resolve.
		teleport_boss(objp);
	} else {
		mprintf((0, "Note: Killing robot #%i because he's badly stuck outside the mine.\n", objp-Objects));
		apply_damage_to_robot(objp, objp->shields*2, objp-Objects);
	}
}

// --------------------------------------------------------------------------------------------------------------------
//	Move object one object radii from current position towards segment center.
//	If segment center is nearer than 2 radii, move it to center.
void move_towards_segment_center(object *objp)
{
	int			segnum = objp->segnum;
	fix			dist_to_center;
	vms_vector	segment_center, goal_dir;

	compute_segment_center(&segment_center, &Segments[segnum]);

	vm_vec_sub(&goal_dir, &segment_center, &objp->pos);
	dist_to_center = vm_vec_normalize_quick(&goal_dir);

	if (dist_to_center < objp->size) {
		//	Center is nearer than the distance we want to move, so move to center.
		objp->pos = segment_center;
		mprintf((0, "Object #%i moved to center of segment #%i (%7.3f %7.3f %7.3f)\n", objp-Objects, objp->segnum, f2fl(objp->pos.x), f2fl(objp->pos.y), f2fl(objp->pos.z)));
		if (object_intersects_wall(objp)) {
			mprintf((0, "Object #%i still illegal, trying trickier move.\n"));
			move_object_to_legal_spot(objp);
		}
	} else {
		int	new_segnum;
		//	Move one radii towards center.
		vm_vec_scale(&goal_dir, objp->size);
		vm_vec_add2(&objp->pos, &goal_dir);
		new_segnum = find_point_seg(&objp->pos, objp->segnum);
		if (new_segnum == -1) {
			objp->pos = segment_center;
			move_object_to_legal_spot(objp);
		}
		// -- mprintf((0, "Obj %i moved twrds seg %i (%6.2f %6.2f %6.2f), dists: [%6.2f %6.2f]\n", objp-Objects, objp->segnum, f2fl(objp->pos.x), f2fl(objp->pos.y), f2fl(objp->pos.z), f2fl(vm_vec_dist_quick(&objp->pos, &segment_center)), f2fl(vm_vec_dist_quick(&objp->pos, &segment_center))));
	}

}

extern	int	Buddy_objnum;

//int	Buddy_got_stuck = 0;

//	-----------------------------------------------------------------------------------------------------------
//	Return true if door can be flown through by a suitable type robot.
//	Brains, avoid robots, companions can open doors.
//	objp == NULL means treat as buddy.
int ai_door_is_openable(object *objp, segment *segp, int sidenum)
{
	int	wall_num;
	wall	*wallp;

	if (!IS_CHILD(segp->children[sidenum]))
		return 0;		//trap -2 (exit side)

	wall_num = segp->sides[sidenum].wall_num;

	if (wall_num == -1)		//if there's no door at all...
		return 0;				//..then say it can't be opened

	//	The mighty console object can open all doors (for purposes of determining paths).
	if (objp == ConsoleObject) {

		if (Walls[wall_num].type == WALL_DOOR)
			return 1;
	}

	wallp = &Walls[wall_num];

	if ((objp == NULL) || (Robot_info[objp->id].companion == 1)) {
		int	ailp_mode;

		if (wallp->flags & WALL_BUDDY_PROOF) {
			if ((wallp->type == WALL_DOOR) && (wallp->state == WALL_DOOR_CLOSED))
				return 0;
			else if (wallp->type == WALL_CLOSED)
				return 0;
			else if ((wallp->type == WALL_ILLUSION) && !(wallp->flags & WALL_ILLUSION_OFF))
				return 0;
		}

		if (wallp->keys != KEY_NONE) {
			if (wallp->keys == KEY_BLUE)
				return (Players[Player_num].flags & PLAYER_FLAGS_BLUE_KEY);
			else if (wallp->keys == KEY_GOLD)
				return (Players[Player_num].flags & PLAYER_FLAGS_GOLD_KEY);
			else if (wallp->keys == KEY_RED)
				return (Players[Player_num].flags & PLAYER_FLAGS_RED_KEY);
		}

		if ((wallp->type != WALL_DOOR) && (wallp->type != WALL_CLOSED))
			return 1;

		//	If Buddy is returning to player, don't let him think he can get through triggered doors.
		//	It's only valid to think that if the player is going to get him through.  But if he's
		//	going to the player, the player is probably on the opposite side.
		if (objp == NULL)
			ailp_mode = Ai_local_info[Buddy_objnum].mode;
		else
			ailp_mode = Ai_local_info[objp-Objects].mode;

		// -- if (Buddy_got_stuck) {
		if (ailp_mode == AIM_GOTO_PLAYER) {
			if ((wallp->type == WALL_BLASTABLE) && (wallp->state != WALL_BLASTED))
				return 0;
			if (wallp->type == WALL_CLOSED)
				return 0;
			if (wallp->type == WALL_DOOR) {
				if ((wallp->flags & WALL_DOOR_LOCKED) && (wallp->state == WALL_DOOR_CLOSED))
					return 0;
			}
		}
		// -- }

		if ((ailp_mode != AIM_GOTO_PLAYER) && (wallp->controlling_trigger != -1)) {
			int	clip_num = wallp->clip_num;

			if (clip_num == -1)
				return 1;
			else if (WallAnims[clip_num].flags & WCF_HIDDEN) {
				if (wallp->state == WALL_DOOR_CLOSED)
					return 0;
				else
					return 1;
			} else
				return 1;
		}

		if (wallp->type == WALL_DOOR)  {
			if (wallp->type == WALL_BLASTABLE)
				return 1;
			else {
				int	clip_num = wallp->clip_num;

				if (clip_num == -1)
					return 1;
				//	Buddy allowed to go through secret doors to get to player.
				else if ((ailp_mode != AIM_GOTO_PLAYER) && (WallAnims[clip_num].flags & WCF_HIDDEN)) {
					if (wallp->state == WALL_DOOR_CLOSED)
						return 0;
					else
						return 1;
				} else
					return 1;
			}
		}
	} else if ((objp->id == ROBOT_BRAIN) || (objp->ctype.ai_info.behavior == AIB_RUN_FROM) || (objp->ctype.ai_info.behavior == AIB_SNIPE)) {
		if (wall_num != -1)
		{
			if ((wallp->type == WALL_DOOR) && (wallp->keys == KEY_NONE) && !(wallp->flags & WALL_DOOR_LOCKED))
				return 1;
			else if (wallp->keys != KEY_NONE) {	//	Allow bots to open doors to which player has keys.
				if (wallp->keys & Players[Player_num].flags)
					return 1;
			}
		}
	}
	return 0;
}

//	-----------------------------------------------------------------------------------------------------------
//	Return side of openable door in segment, if any.  If none, return -1.
int openable_doors_in_segment(int segnum)
{
	int	i;

	if ((segnum < 0) || (segnum > Highest_segment_index))
		return -1;

	for (i=0; i<MAX_SIDES_PER_SEGMENT; i++) {
		if (Segments[segnum].sides[i].wall_num != -1) {
			int	wall_num = Segments[segnum].sides[i].wall_num;
			if ((Walls[wall_num].type == WALL_DOOR) && (Walls[wall_num].keys == KEY_NONE) && (Walls[wall_num].state == WALL_DOOR_CLOSED) && !(Walls[wall_num].flags & WALL_DOOR_LOCKED) && !(WallAnims[Walls[wall_num].clip_num].flags & WCF_HIDDEN))
				return i;
		}
	}

	return -1;

}

// -- // --------------------------------------------------------------------------------------------------------------------
// -- //	Return true if a special object (player or control center) is in this segment.
// -- int special_object_in_seg(int segnum)
// -- {
// -- 	int	objnum;
// --
// -- 	objnum = Segments[segnum].objects;
// --
// -- 	while (objnum != -1) {
// -- 		if ((Objects[objnum].type == OBJ_PLAYER) || (Objects[objnum].type == OBJ_CNTRLCEN)) {
// -- 			mprintf((0, "Special object of type %i in segment %i\n", Objects[objnum].type, segnum));
// -- 			return 1;
// -- 		} else
// -- 			objnum = Objects[objnum].next;
// -- 	}
// --
// -- 	return 0;
// -- }

// -- // --------------------------------------------------------------------------------------------------------------------
// -- //	Randomly select a segment attached to *segp, reachable by flying.
// -- int get_random_child(int segnum)
// -- {
// -- 	int	sidenum;
// -- 	segment	*segp = &Segments[segnum];
// --
// -- 	sidenum = (rand() * 6) >> 15;
// --
// -- 	while (!(WALL_IS_DOORWAY(segp, sidenum) & WID_FLY_FLAG))
// -- 		sidenum = (rand() * 6) >> 15;
// --
// -- 	segnum = segp->children[sidenum];
// --
// -- 	return segnum;
// -- }

// --------------------------------------------------------------------------------------------------------------------
//	Return true if placing an object of size size at pos *pos intersects a (player or robot or control center) in segment *segp.
int check_object_object_intersection(vms_vector *pos, fix size, segment *segp)
{
	int		curobjnum;

	//	If this would intersect with another object (only check those in this segment), then try to move.
	curobjnum = segp->objects;
	while (curobjnum != -1) {
		object *curobjp = &Objects[curobjnum];
		if ((curobjp->type == OBJ_PLAYER) || (curobjp->type == OBJ_ROBOT) || (curobjp->type == OBJ_CNTRLCEN)) {
			if (vm_vec_dist_quick(pos, &curobjp->pos) < size + curobjp->size)
				return 1;
		}
		curobjnum = curobjp->next;
	}

	return 0;

}

// --------------------------------------------------------------------------------------------------------------------
//	Return objnum if object created, else return -1.
//	If pos == NULL, pick random spot in segment.
int create_gated_robot( int segnum, int object_id, vms_vector *pos)
{
	int		objnum;
	object	*objp;
	segment	*segp = &Segments[segnum];
	vms_vector	object_pos;
	robot_info	*robptr = &Robot_info[object_id];
	int		i, count=0;
	fix		objsize = Polygon_models[robptr->model_num].rad;
	int		default_behavior;

	if (GameTime - Last_gate_time < Gate_interval)
		return -1;

	for (i=0; i<=Highest_object_index; i++)
		if (Objects[i].type == OBJ_ROBOT)
			if (Objects[i].matcen_creator == BOSS_GATE_MATCEN_NUM)
				count++;

	if (count > 2*Difficulty_level + 6) {
		//mprintf((0, "Cannot gate in a robot until you kill one.\n"));
		Last_gate_time = GameTime - 3*Gate_interval/4;
		return -1;
	}

	compute_segment_center(&object_pos, segp);
	if (pos == NULL)
		pick_random_point_in_seg(&object_pos, segp-Segments);
	else
		object_pos = *pos;

	//	See if legal to place object here.  If not, move about in segment and try again.
	if (check_object_object_intersection(&object_pos, objsize, segp)) {
		//mprintf((0, "Can't get in because object collides with something.\n"));
		Last_gate_time = GameTime - 3*Gate_interval/4;
		return -1;
	}

	objnum = obj_create(OBJ_ROBOT, object_id, segnum, &object_pos, &vmd_identity_matrix, objsize, CT_AI, MT_PHYSICS, RT_POLYOBJ);

	if ( objnum < 0 ) {
		// mprintf((1, "Can't get object to gate in robot.  Not gating in.\n"));
		Last_gate_time = GameTime - 3*Gate_interval/4;
		return -1;
	}

	//mprintf((0, "Gating in object %i in segment %i\n", objnum, segp-Segments));

	Objects[objnum].lifeleft = F1_0*30;	//	Gated in robots only live 30 seconds.

#ifdef NETWORK
	Net_create_objnums[0] = objnum; // A convenient global to get objnum back to caller for multiplayer
#endif

	objp = &Objects[objnum];

	//Set polygon-object-specific data

	objp->rtype.pobj_info.model_num = robptr->model_num;
	objp->rtype.pobj_info.subobj_flags = 0;

	//set Physics info

	objp->mtype.phys_info.mass = robptr->mass;
	objp->mtype.phys_info.drag = robptr->drag;

	objp->mtype.phys_info.flags |= (PF_LEVELLING);

	objp->shields = robptr->strength;
	objp->matcen_creator = BOSS_GATE_MATCEN_NUM;	//	flag this robot as having been created by the boss.

	default_behavior = Robot_info[objp->id].behavior;
	init_ai_object(objp-Objects, default_behavior, -1 );		//	Note, -1 = segment this robot goes to to hide, should probably be something useful

	object_create_explosion(segnum, &object_pos, i2f(10), VCLIP_MORPHING_ROBOT );
	digi_link_sound_to_pos( Vclip[VCLIP_MORPHING_ROBOT].sound_num, segnum, 0, &object_pos, 0 , F1_0);
	morph_start(objp);

	Last_gate_time = GameTime;

	Players[Player_num].num_robots_level++;
	Players[Player_num].num_robots_total++;

	return objp-Objects;
}

#define	MAX_SPEW_BOT		3

int	Spew_bots[NUM_D2_BOSSES][MAX_SPEW_BOT] = {
	{38, 40, -1},
	{37, -1, -1},
	{43, 57, -1},
	{26, 27, 58},
	{59, 58, 54},
	{60, 61, 54},

	{69, 29, 24},
	{72, 60, 73}
};

int	Max_spew_bots[NUM_D2_BOSSES] = {2, 1, 2, 3, 3, 3,  3, 3};

//	----------------------------------------------------------------------------------------------------------
//	objp points at a boss.  He was presumably just hit and he's supposed to create a bot at the hit location *pos.
int boss_spew_robot(object *objp, vms_vector *pos)
{
	int		objnum, segnum;
	int		boss_index;

	boss_index = Robot_info[objp->id].boss_flag - BOSS_D2;

	Assert((boss_index >= 0) && (boss_index < NUM_D2_BOSSES));

	segnum = find_point_seg(pos, objp->segnum);
	if (segnum == -1) {
		mprintf((0, "Tried to spew a bot outside the mine!  Aborting!\n"));
		return -1;
	}

	objnum = create_gated_robot( segnum, Spew_bots[boss_index][(Max_spew_bots[boss_index] * d_rand()) >> 15], pos);

	//	Make spewed robot come tumbling out as if blasted by a flash missile.
	if (objnum != -1) {
		object	*newobjp = &Objects[objnum];
		int		force_val;

		force_val = F1_0/FrameTime;

		if (force_val) {
			newobjp->ctype.ai_info.SKIP_AI_COUNT += force_val;
			newobjp->mtype.phys_info.rotthrust.x = ((d_rand() - 16384) * force_val)/16;
			newobjp->mtype.phys_info.rotthrust.y = ((d_rand() - 16384) * force_val)/16;
			newobjp->mtype.phys_info.rotthrust.z = ((d_rand() - 16384) * force_val)/16;
			newobjp->mtype.phys_info.flags |= PF_USES_THRUST;

			//	Now, give a big initial velocity to get moving away from boss.
			vm_vec_sub(&newobjp->mtype.phys_info.velocity, pos, &objp->pos);
			vm_vec_normalize_quick(&newobjp->mtype.phys_info.velocity);
			vm_vec_scale(&newobjp->mtype.phys_info.velocity, F1_0*128);
		}
	}

	return objnum;
}

// --------------------------------------------------------------------------------------------------------------------
//	Call this each time the player starts a new ship.
void init_ai_for_ship(void)
{
	int	i;

	for (i=0; i<MAX_AI_CLOAK_INFO; i++) {
		Ai_cloak_info[i].last_time = GameTime;
		Ai_cloak_info[i].last_segment = ConsoleObject->segnum;
		Ai_cloak_info[i].last_position = ConsoleObject->pos;
	}
}

// --------------------------------------------------------------------------------------------------------------------
//	Make object objp gate in a robot.
//	The process of him bringing in a robot takes one second.
//	Then a robot appears somewhere near the player.
//	Return objnum if robot successfully created, else return -1
int gate_in_robot(int type, int segnum)
{
	if (segnum < 0)
		segnum = Boss_gate_segs[(d_rand() * Num_boss_gate_segs) >> 15];

	Assert((segnum >= 0) && (segnum <= Highest_segment_index));

	return create_gated_robot(segnum, type, NULL);
}

// --------------------------------------------------------------------------------------------------------------------
int boss_fits_in_seg(object *boss_objp, int segnum)
{
	vms_vector	segcenter;
	int			boss_objnum = boss_objp-Objects;
	int			posnum;

	compute_segment_center(&segcenter, &Segments[segnum]);

	for (posnum=0; posnum<9; posnum++) {
		if (posnum > 0) {
			vms_vector	vertex_pos;

			Assert((posnum-1 >= 0) && (posnum-1 < 8));
			vertex_pos = Vertices[Segments[segnum].verts[posnum-1]];
			vm_vec_avg(&boss_objp->pos, &vertex_pos, &segcenter);
		} else
			boss_objp->pos = segcenter;

		obj_relink(boss_objnum, segnum);
		if (!object_intersects_wall(boss_objp))
			return 1;
	}

	return 0;
}

// --------------------------------------------------------------------------------------------------------------------
void teleport_boss(object *objp)
{
	int			rand_segnum, rand_index;
	vms_vector	boss_dir;
	Assert(Num_boss_teleport_segs > 0);

	//	Pick a random segment from the list of boss-teleportable-to segments.
	rand_index = (d_rand() * Num_boss_teleport_segs) >> 15;
	rand_segnum = Boss_teleport_segs[rand_index];
	Assert((rand_segnum >= 0) && (rand_segnum <= Highest_segment_index));

	//mprintf((0, "Frame %i: Boss teleporting to segment #%i, pos = {%8x %8x %8x}.\n", FrameCount, rand_segnum, objp->pos.x, objp->pos.y, objp->pos.z));

#ifdef NETWORK
	if (Game_mode & GM_MULTI)
		multi_send_boss_actions(objp-Objects, 1, rand_segnum, 0);
#endif

	compute_segment_center(&objp->pos, &Segments[rand_segnum]);
	obj_relink(objp-Objects, rand_segnum);

	Last_teleport_time = GameTime;

	//	make boss point right at player
	vm_vec_sub(&boss_dir, &Objects[Players[Player_num].objnum].pos, &objp->pos);
	vm_vector_2_matrix(&objp->orient, &boss_dir, NULL, NULL);

	digi_link_sound_to_pos( Vclip[VCLIP_MORPHING_ROBOT].sound_num, rand_segnum, 0, &objp->pos, 0 , F1_0);
	digi_kill_sound_linked_to_object( objp-Objects);
	digi_link_sound_to_object2( Robot_info[objp->id].see_sound, objp-Objects, 1, F1_0, F1_0*512 );	//	F1_0*512 means play twice as loud

	//	After a teleport, boss can fire right away.
	Ai_local_info[objp-Objects].next_fire = 0;
	Ai_local_info[objp-Objects].next_fire2 = 0;

}

//	----------------------------------------------------------------------
void start_boss_death_sequence(object *objp)
{
	if (Robot_info[objp->id].boss_flag) {
		Boss_dying = 1;
		Boss_dying_start_time = GameTime;
	}

}

//	----------------------------------------------------------------------
//	General purpose robot-dies-with-death-roll-and-groan code.
//	Return true if object just died.
//	scale: F1_0*4 for boss, much smaller for much smaller guys
int do_robot_dying_frame(object *objp, fix start_time, fix roll_duration, byte *dying_sound_playing, int death_sound, fix expl_scale, fix sound_scale)
{
	fix	roll_val, temp;
	fix	sound_duration;

	if (!roll_duration)
		roll_duration = F1_0/4;

	roll_val = fixdiv(GameTime - start_time, roll_duration);

	fix_sincos(fixmul(roll_val, roll_val), &temp, &objp->mtype.phys_info.rotvel.x);
	fix_sincos(roll_val, &temp, &objp->mtype.phys_info.rotvel.y);
	fix_sincos(roll_val-F1_0/8, &temp, &objp->mtype.phys_info.rotvel.z);

	objp->mtype.phys_info.rotvel.x = (GameTime - start_time)/9;
	objp->mtype.phys_info.rotvel.y = (GameTime - start_time)/5;
	objp->mtype.phys_info.rotvel.z = (GameTime - start_time)/7;

	if (digi_sample_rate)
		sound_duration = fixdiv(GameSounds[digi_xlat_sound(death_sound)].length,digi_sample_rate);
	else
		sound_duration = F1_0;

	if (start_time + roll_duration - sound_duration < GameTime) {
		if (!*dying_sound_playing) {
			mprintf((0, "Starting death sound!\n"));
			*dying_sound_playing = 1;
			digi_link_sound_to_object2( death_sound, objp-Objects, 0, sound_scale, sound_scale*256 );	//	F1_0*512 means play twice as loud
		} else if (d_rand() < FrameTime*16)
			create_small_fireball_on_object(objp, (F1_0 + d_rand()) * (16 * expl_scale/F1_0)/8, 0);
	} else if (d_rand() < FrameTime*8)
		create_small_fireball_on_object(objp, (F1_0/2 + d_rand()) * (16 * expl_scale/F1_0)/8, 1);

	if (start_time + roll_duration < GameTime)
		return 1;
	else
		return 0;
}

//	----------------------------------------------------------------------
void start_robot_death_sequence(object *objp)
{
	objp->ctype.ai_info.dying_start_time = GameTime;
	objp->ctype.ai_info.dying_sound_playing = 0;
	objp->ctype.ai_info.SKIP_AI_COUNT = 0;

}

//	----------------------------------------------------------------------
void do_boss_dying_frame(object *objp)
{
	int	rval;

	rval = do_robot_dying_frame(objp, Boss_dying_start_time, BOSS_DEATH_DURATION, &Boss_dying_sound_playing, Robot_info[objp->id].deathroll_sound, F1_0*4, F1_0*4);

	if (rval) {
		do_controlcen_destroyed_stuff(NULL);
		explode_object(objp, F1_0/4);
		digi_link_sound_to_object2(SOUND_BADASS_EXPLOSION, objp-Objects, 0, F2_0, F1_0*512);
	}
}

extern void recreate_thief(object *objp);

//	----------------------------------------------------------------------
int do_any_robot_dying_frame(object *objp)
{
	if (objp->ctype.ai_info.dying_start_time) {
		int	rval, death_roll;

		death_roll = Robot_info[objp->id].death_roll;
		rval = do_robot_dying_frame(objp, objp->ctype.ai_info.dying_start_time, min(death_roll/2+1,6)*F1_0, &objp->ctype.ai_info.dying_sound_playing, Robot_info[objp->id].deathroll_sound, death_roll*F1_0/8, death_roll*F1_0/2);

		if (rval) {
			explode_object(objp, F1_0/4);
			digi_link_sound_to_object2(SOUND_BADASS_EXPLOSION, objp-Objects, 0, F2_0, F1_0*512);
			if ((Current_level_num < 0) && (Robot_info[objp->id].thief))
				recreate_thief(objp);
		}

		return 1;
	}

	return 0;
}

// --------------------------------------------------------------------------------------------------------------------
//	Called for an AI object if it is fairly aware of the player.
//	awareness_level is in 0..100.  Larger numbers indicate greater awareness (eg, 99 if firing at player).
//	In a given frame, might not get called for an object, or might be called more than once.
//	The fact that this routine is not called for a given object does not mean that object is not interested in the player.
//	Objects are moved by physics, so they can move even if not interested in a player.  However, if their velocity or
//	orientation is changing, this routine will be called.
//	Return value:
//		0	this player IS NOT allowed to move this robot.
//		1	this player IS allowed to move this robot.
int ai_multiplayer_awareness(object *objp, int awareness_level)
{
	int	rval=1;

#ifdef NETWORK
	if (Game_mode & GM_MULTI) {
		if (awareness_level == 0)
			return 0;
		rval = multi_can_move_robot(objp-Objects, awareness_level);
	}
#endif

	return rval;

}

#ifndef NDEBUG
fix	Prev_boss_shields = -1;
#endif

// --------------------------------------------------------------------------------------------------------------------
//	Do special stuff for a boss.
void do_boss_stuff(object *objp, int player_visibility)
{
	int	boss_id, boss_index;

	boss_id = Robot_info[objp->id].boss_flag;

	Assert((boss_id >= BOSS_D2) && (boss_id < BOSS_D2 + NUM_D2_BOSSES));

	boss_index = boss_id - BOSS_D2;

#ifndef NDEBUG
	if (objp->shields != Prev_boss_shields) {
		mprintf((0, "Boss shields = %7.3f, object %i\n", f2fl(objp->shields), objp-Objects));
		Prev_boss_shields = objp->shields;
	}
#endif

	//	New code, fixes stupid bug which meant boss never gated in robots if > 32767 seconds played.
	if (Last_teleport_time > GameTime)
		Last_teleport_time = GameTime;

	if (Last_gate_time > GameTime)
		Last_gate_time = GameTime;

	//	@mk, 10/13/95:  Reason:
	//		Level 4 boss behind locked door.  But he's allowed to teleport out of there.  So he
	//		teleports out of there right away, and blasts player right after first door.
	if (!player_visibility && (GameTime - Boss_hit_time > F1_0*2))
		return;

	if (!Boss_dying && Boss_teleports[boss_index]) {
		if (objp->ctype.ai_info.CLOAKED == 1) {
			Boss_hit_time = GameTime;	//	Keep the cloak:teleport process going.
			if ((GameTime - Boss_cloak_start_time > BOSS_CLOAK_DURATION/3) && (Boss_cloak_end_time - GameTime > BOSS_CLOAK_DURATION/3) && (GameTime - Last_teleport_time > Boss_teleport_interval)) {
				if (ai_multiplayer_awareness(objp, 98))
					teleport_boss(objp);
			} else if (GameTime - Boss_hit_time > F1_0*2) {
				Last_teleport_time -= Boss_teleport_interval/4;
			}

			if (GameTime > Boss_cloak_end_time || GameTime < Boss_cloak_start_time)
				objp->ctype.ai_info.CLOAKED = 0;
		} else if ((GameTime - Boss_cloak_end_time > Boss_cloak_interval) || (GameTime - Boss_cloak_end_time < -Boss_cloak_duration)) {
			if (ai_multiplayer_awareness(objp, 95)) {
				Boss_cloak_start_time = GameTime;
				Boss_cloak_end_time = GameTime+Boss_cloak_duration;
				objp->ctype.ai_info.CLOAKED = 1;
#ifdef NETWORK
				if (Game_mode & GM_MULTI)
					multi_send_boss_actions(objp-Objects, 2, 0, 0);
#endif
			}
		}
	}

}

#define	BOSS_TO_PLAYER_GATE_DISTANCE	(F1_0*200)

// -- Obsolete D1 code -- // --------------------------------------------------------------------------------------------------------------------
// -- Obsolete D1 code -- //	Do special stuff for a boss.
// -- Obsolete D1 code -- void do_super_boss_stuff(object *objp, fix dist_to_player, int player_visibility)
// -- Obsolete D1 code -- {
// -- Obsolete D1 code -- 	static int eclip_state = 0;
// -- Obsolete D1 code --
// -- Obsolete D1 code -- 	do_boss_stuff(objp, player_visibility);
// -- Obsolete D1 code --
// -- Obsolete D1 code -- 	// Only master player can cause gating to occur.
// -- Obsolete D1 code -- 	if ((Game_mode & GM_MULTI) && !network_i_am_master())
// -- Obsolete D1 code -- 		return;
// -- Obsolete D1 code --
// -- Obsolete D1 code -- 	if ((dist_to_player < BOSS_TO_PLAYER_GATE_DISTANCE) || player_visibility || (Game_mode & GM_MULTI)) {
// -- Obsolete D1 code -- 		if (GameTime - Last_gate_time > Gate_interval/2) {
// -- Obsolete D1 code -- 			restart_effect(BOSS_ECLIP_NUM);
// -- Obsolete D1 code -- 			if (eclip_state == 0) {
// -- Obsolete D1 code -- 				multi_send_boss_actions(objp-Objects, 4, 0, 0);
// -- Obsolete D1 code -- 				eclip_state = 1;
// -- Obsolete D1 code -- 			}
// -- Obsolete D1 code -- 		}
// -- Obsolete D1 code -- 		else {
// -- Obsolete D1 code -- 			stop_effect(BOSS_ECLIP_NUM);
// -- Obsolete D1 code -- 			if (eclip_state == 1) {
// -- Obsolete D1 code -- 				multi_send_boss_actions(objp-Objects, 5, 0, 0);
// -- Obsolete D1 code -- 				eclip_state = 0;
// -- Obsolete D1 code -- 			}
// -- Obsolete D1 code -- 		}
// -- Obsolete D1 code --
// -- Obsolete D1 code -- 		if (GameTime - Last_gate_time > Gate_interval)
// -- Obsolete D1 code -- 			if (ai_multiplayer_awareness(objp, 99)) {
// -- Obsolete D1 code -- 				int	rtval;
// -- Obsolete D1 code -- 				int	randtype = (d_rand() * MAX_GATE_INDEX) >> 15;
// -- Obsolete D1 code --
// -- Obsolete D1 code -- 				Assert(randtype < MAX_GATE_INDEX);
// -- Obsolete D1 code -- 				randtype = Super_boss_gate_list[randtype];
// -- Obsolete D1 code -- 				Assert(randtype < N_robot_types);
// -- Obsolete D1 code --
// -- Obsolete D1 code -- 				rtval = gate_in_robot(randtype, -1);
// -- Obsolete D1 code -- 				if ((rtval != -1) && (Game_mode & GM_MULTI))
// -- Obsolete D1 code -- 				{
// -- Obsolete D1 code -- 					multi_send_boss_actions(objp-Objects, 3, randtype, Net_create_objnums[0]);
// -- Obsolete D1 code -- 					map_objnum_local_to_local(Net_create_objnums[0]);
// -- Obsolete D1 code -- 				}
// -- Obsolete D1 code -- 			}
// -- Obsolete D1 code -- 	}
// -- Obsolete D1 code -- }

//int multi_can_move_robot(object *objp, int awareness_level)
//{
//	return 0;
//}

void ai_multi_send_robot_position(int objnum, int force)
{
#ifdef NETWORK
	if (Game_mode & GM_MULTI)
	{
		if (force != -1)
			multi_send_robot_position(objnum, 1);
		else
			multi_send_robot_position(objnum, 0);
	}
#endif
	return;
}

// --------------------------------------------------------------------------------------------------------------------
//	Returns true if this object should be allowed to fire at the player.
int maybe_ai_do_actual_firing_stuff(object *obj, ai_static *aip)
{
#ifdef NETWORK
	if (Game_mode & GM_MULTI)
		if ((aip->GOAL_STATE != AIS_FLIN) && (obj->id != ROBOT_BRAIN))
			if (aip->CURRENT_STATE == AIS_FIRE)
				return 1;
#endif

	return 0;
}

vms_vector	Last_fired_upon_player_pos;

// --------------------------------------------------------------------------------------------------------------------
//	If fire_anyway, fire even if player is not visible.  We're firing near where we believe him to be.  Perhaps he's
//	lurking behind a corner.
void ai_do_actual_firing_stuff(object *obj, ai_static *aip, ai_local *ailp, robot_info *robptr, vms_vector *vec_to_player, fix dist_to_player, vms_vector *gun_point, int player_visibility, int object_animates, int gun_num)
{
	fix	dot;

	if ((player_visibility == 2) || (Dist_to_last_fired_upon_player_pos < FIRE_AT_NEARBY_PLAYER_THRESHOLD )) {
		vms_vector	fire_pos;

		fire_pos = Believed_player_pos;

		//	Hack: If visibility not == 2, we're here because we're firing at a nearby player.
		//	So, fire at Last_fired_upon_player_pos instead of the player position.
		if (!robptr->attack_type && (player_visibility != 2))
			fire_pos = Last_fired_upon_player_pos;

		//	Changed by mk, 01/04/95, onearm would take about 9 seconds until he can fire at you.
		//	Above comment corrected.  Date changed from 1994, to 1995.  Should fix some very subtle bugs, as well as not cause me to wonder, in the future, why I was writing AI code for onearm ten months before he existed.
		if (!object_animates || ready_to_fire(robptr, ailp)) {
			dot = vm_vec_dot(&obj->orient.fvec, vec_to_player);
			if ((dot >= 7*F1_0/8) || ((dot > F1_0/4) &&  robptr->boss_flag)) {

				if (gun_num < Robot_info[obj->id].n_guns) {
					if (robptr->attack_type == 1) {
						if (!Player_exploded && (dist_to_player < obj->size + ConsoleObject->size + F1_0*2)) {		// robptr->circle_distance[Difficulty_level] + ConsoleObject->size) {
							if (!ai_multiplayer_awareness(obj, ROBOT_FIRE_AGITATION-2))
								return;
							do_ai_robot_hit_attack(obj, ConsoleObject, &obj->pos);
						} else {
							// mprintf((0, "Green won't fire: Too far: dist = %7.3f, threshold = %7.3f\n", f2fl(dist_to_player), f2fl(obj->size + ConsoleObject->size + F1_0*2)));
							return;
						}
					} else {
						if ((gun_point->x == 0) && (gun_point->y == 0) && (gun_point->z == 0)) {
							; //mprintf((0, "Would like to fire gun, but gun not selected.\n"));
						} else {
							if (!ai_multiplayer_awareness(obj, ROBOT_FIRE_AGITATION))
								return;
							//	New, multi-weapon-type system, 06/05/95 (life is slipping away...)
							if (gun_num != 0) {
								if (ailp->next_fire <= 0) {
									ai_fire_laser_at_player(obj, gun_point, gun_num, &fire_pos);
									Last_fired_upon_player_pos = fire_pos;
								}

								if ((ailp->next_fire2 <= 0) && (robptr->weapon_type2 != -1)) {
									calc_gun_point(gun_point, obj, 0);
									ai_fire_laser_at_player(obj, gun_point, 0, &fire_pos);
									Last_fired_upon_player_pos = fire_pos;
								}

							} else if (ailp->next_fire <= 0) {
								ai_fire_laser_at_player(obj, gun_point, gun_num, &fire_pos);
								Last_fired_upon_player_pos = fire_pos;
							}
						}
					}

					//	Wants to fire, so should go into chase mode, probably.
					if ( (aip->behavior != AIB_RUN_FROM)
						 && (aip->behavior != AIB_STILL)
						 && (aip->behavior != AIB_SNIPE)
						 && (aip->behavior != AIB_FOLLOW)
						 && (!robptr->attack_type)
						 && ((ailp->mode == AIM_FOLLOW_PATH) || (ailp->mode == AIM_STILL)))
						ailp->mode = AIM_CHASE_OBJECT;
				}

				aip->GOAL_STATE = AIS_RECO;
				ailp->goal_state[aip->CURRENT_GUN] = AIS_RECO;

				// Switch to next gun for next fire.  If has 2 gun types, select gun #1, if exists.
				aip->CURRENT_GUN++;
				if (aip->CURRENT_GUN >= Robot_info[obj->id].n_guns)
				{
					if ((Robot_info[obj->id].n_guns == 1) || (Robot_info[obj->id].weapon_type2 == -1))
						aip->CURRENT_GUN = 0;
					else
						aip->CURRENT_GUN = 1;
				}
			}
		}
	} else if ( ((!robptr->attack_type) && (Weapon_info[Robot_info[obj->id].weapon_type].homing_flag == 1)) || (((Robot_info[obj->id].weapon_type2 != -1) && (Weapon_info[Robot_info[obj->id].weapon_type2].homing_flag == 1))) ) {
		//	Robots which fire homing weapons might fire even if they don't have a bead on the player.
		if (((!object_animates) || (ailp->achieved_state[aip->CURRENT_GUN] == AIS_FIRE))
			 && (((ailp->next_fire <= 0) && (aip->CURRENT_GUN != 0)) || ((ailp->next_fire2 <= 0) && (aip->CURRENT_GUN == 0)))
			 && (vm_vec_dist_quick(&Hit_pos, &obj->pos) > F1_0*40)) {
			if (!ai_multiplayer_awareness(obj, ROBOT_FIRE_AGITATION))
				return;
			ai_fire_laser_at_player(obj, gun_point, gun_num, &Believed_player_pos);

			aip->GOAL_STATE = AIS_RECO;
			ailp->goal_state[aip->CURRENT_GUN] = AIS_RECO;

			// Switch to next gun for next fire.
			aip->CURRENT_GUN++;
			if (aip->CURRENT_GUN >= Robot_info[obj->id].n_guns)
				aip->CURRENT_GUN = 0;
		} else {
			// Switch to next gun for next fire.
			aip->CURRENT_GUN++;
			if (aip->CURRENT_GUN >= Robot_info[obj->id].n_guns)
				aip->CURRENT_GUN = 0;
		}
	} else {


	//	---------------------------------------------------------------

		vms_vector	vec_to_last_pos;

		if (d_rand()/2 < fixmul(FrameTime, (Difficulty_level << 12) + 0x4000)) {
		if ((!object_animates || ready_to_fire(robptr, ailp)) && (Dist_to_last_fired_upon_player_pos < FIRE_AT_NEARBY_PLAYER_THRESHOLD)) {
			vm_vec_normalized_dir_quick(&vec_to_last_pos, &Believed_player_pos, &obj->pos);
			dot = vm_vec_dot(&obj->orient.fvec, &vec_to_last_pos);
			if (dot >= 7*F1_0/8) {

				if (aip->CURRENT_GUN < Robot_info[obj->id].n_guns) {
					if (robptr->attack_type == 1) {
						if (!Player_exploded && (dist_to_player < obj->size + ConsoleObject->size + F1_0*2)) {		// robptr->circle_distance[Difficulty_level] + ConsoleObject->size) {
							if (!ai_multiplayer_awareness(obj, ROBOT_FIRE_AGITATION-2))
								return;
							do_ai_robot_hit_attack(obj, ConsoleObject, &obj->pos);
						} else {
							// mprintf((0, "Green won't fire: Too far: dist = %7.3f, threshold = %7.3f\n", f2fl(dist_to_player), f2fl(obj->size + ConsoleObject->size + F1_0*2)));
							return;
						}
					} else {
						if ((gun_point->x == 0) && (gun_point->y == 0) && (gun_point->z == 0)) {
							; //mprintf((0, "Would like to fire gun, but gun not selected.\n"));
						} else {
							if (!ai_multiplayer_awareness(obj, ROBOT_FIRE_AGITATION))
								return;
							//	New, multi-weapon-type system, 06/05/95 (life is slipping away...)
							if (gun_num != 0) {
								if (ailp->next_fire <= 0)
									ai_fire_laser_at_player(obj, gun_point, gun_num, &Last_fired_upon_player_pos);

								if ((ailp->next_fire2 <= 0) && (robptr->weapon_type2 != -1)) {
									calc_gun_point(gun_point, obj, 0);
									ai_fire_laser_at_player(obj, gun_point, 0, &Last_fired_upon_player_pos);
								}

							} else if (ailp->next_fire <= 0)
								ai_fire_laser_at_player(obj, gun_point, gun_num, &Last_fired_upon_player_pos);
						}
					}

					//	Wants to fire, so should go into chase mode, probably.
					if ( (aip->behavior != AIB_RUN_FROM) && (aip->behavior != AIB_STILL) && (aip->behavior != AIB_SNIPE) && (aip->behavior != AIB_FOLLOW) && ((ailp->mode == AIM_FOLLOW_PATH) || (ailp->mode == AIM_STILL)))
						ailp->mode = AIM_CHASE_OBJECT;
				}
				aip->GOAL_STATE = AIS_RECO;
				ailp->goal_state[aip->CURRENT_GUN] = AIS_RECO;

				// Switch to next gun for next fire.
				aip->CURRENT_GUN++;
				if (aip->CURRENT_GUN >= Robot_info[obj->id].n_guns)
				{
					if (Robot_info[obj->id].n_guns == 1)
						aip->CURRENT_GUN = 0;
					else
						aip->CURRENT_GUN = 1;
				}
			}
		}
		}


	//	---------------------------------------------------------------


	}

}