codemp/game/NPC_AI_Grenadier.c

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#include "b_local.h"
#include "g_nav.h"
#include "anims.h"
//#include "g_navigator.h"

#include "../namespace_begin.h"
extern qboolean BG_SabersOff( playerState_t *ps );
#include "../namespace_end.h"

extern void CG_DrawAlert( vec3_t origin, float rating );
extern void G_AddVoiceEvent( gentity_t *self, int event, int speakDebounceTime );
extern void G_SoundOnEnt( gentity_t *ent, soundChannel_t channel, const char *soundPath );
extern void NPC_TempLookTarget( gentity_t *self, int lookEntNum, int minLookTime, int maxLookTime );
extern qboolean G_ExpandPointToBBox( vec3_t point, const vec3_t mins, const vec3_t maxs, int ignore, int clipmask );
extern void NPC_AimAdjust( int change );
extern qboolean FlyingCreature( gentity_t *ent );

#define MAX_VIEW_DIST           1024
#define MAX_VIEW_SPEED          250
#define MAX_LIGHT_INTENSITY 255
#define MIN_LIGHT_THRESHOLD     0.1

#define DISTANCE_SCALE          0.25f
#define DISTANCE_THRESHOLD      0.075f
#define SPEED_SCALE                     0.25f
#define FOV_SCALE                       0.5f
#define LIGHT_SCALE                     0.25f

#define REALIZE_THRESHOLD       0.6f
#define CAUTIOUS_THRESHOLD      ( REALIZE_THRESHOLD * 0.75 )

qboolean NPC_CheckPlayerTeamStealth( void );

static qboolean enemyLOS3;
static qboolean enemyCS3;
static qboolean faceEnemy3;
static qboolean move3;
static qboolean shoot3;
static float    enemyDist3;

//Local state enums
enum
{
        LSTATE_NONE = 0,
        LSTATE_UNDERFIRE,
        LSTATE_INVESTIGATE,
};

void Grenadier_ClearTimers( gentity_t *ent )
{
        TIMER_Set( ent, "chatter", 0 );
        TIMER_Set( ent, "duck", 0 );
        TIMER_Set( ent, "stand", 0 );
        TIMER_Set( ent, "shuffleTime", 0 );
        TIMER_Set( ent, "sleepTime", 0 );
        TIMER_Set( ent, "enemyLastVisible", 0 );
        TIMER_Set( ent, "roamTime", 0 );
        TIMER_Set( ent, "hideTime", 0 );
        TIMER_Set( ent, "attackDelay", 0 );     //FIXME: Slant for difficulty levels
        TIMER_Set( ent, "stick", 0 );
        TIMER_Set( ent, "scoutTime", 0 );
        TIMER_Set( ent, "flee", 0 );
}

void NPC_Grenadier_PlayConfusionSound( gentity_t *self )
{//FIXME: make this a custom sound in sound set
        if ( self->health > 0 )
        {
                G_AddVoiceEvent( self, Q_irand(EV_CONFUSE1, EV_CONFUSE3), 2000 );
        }
        //reset him to be totally unaware again
        TIMER_Set( self, "enemyLastVisible", 0 );
        TIMER_Set( self, "flee", 0 );
        self->NPC->squadState = SQUAD_IDLE;
        self->NPC->tempBehavior = BS_DEFAULT;
        
        //self->NPC->behaviorState = BS_PATROL;
        G_ClearEnemy( self );//FIXME: or just self->enemy = NULL;?

        self->NPC->investigateCount = 0;
}


/*
-------------------------
NPC_ST_Pain
-------------------------
*/

void NPC_Grenadier_Pain(gentity_t *self, gentity_t *attacker, int damage) 
{
        self->NPC->localState = LSTATE_UNDERFIRE;

        TIMER_Set( self, "duck", -1 );
        TIMER_Set( self, "stand", 2000 );

        NPC_Pain( self, attacker, damage );

        if ( !damage && self->health > 0 )
        {//FIXME: better way to know I was pushed
                G_AddVoiceEvent( self, Q_irand(EV_PUSHED1, EV_PUSHED3), 2000 );
        }
}

/*
-------------------------
ST_HoldPosition
-------------------------
*/

static void Grenadier_HoldPosition( void )
{
        NPC_FreeCombatPoint( NPCInfo->combatPoint, qtrue );
        NPCInfo->goalEntity = NULL;
        
        /*if ( TIMER_Done( NPC, "stand" ) )
        {//FIXME: what if can't shoot from this pos?
                TIMER_Set( NPC, "duck", Q_irand( 2000, 4000 ) );
        }
        */
}

/*
-------------------------
ST_Move
-------------------------
*/

static qboolean Grenadier_Move( void )
{
        qboolean        moved;
        navInfo_t       info;

        NPCInfo->combatMove = qtrue;//always move straight toward our goal
        moved = NPC_MoveToGoal( qtrue );
        
        //Get the move info
        NAV_GetLastMove( &info );

        //FIXME: if we bump into another one of our guys and can't get around him, just stop!
        //If we hit our target, then stop and fire!
        if ( info.flags & NIF_COLLISION ) 
        {
                if ( info.blocker == NPC->enemy )
                {
                        Grenadier_HoldPosition();
                }
        }

        //If our move failed, then reset
        if ( moved == qfalse )
        {//couldn't get to enemy
                if ( (NPCInfo->scriptFlags&SCF_CHASE_ENEMIES) && NPC->client->ps.weapon == WP_THERMAL && NPCInfo->goalEntity && NPCInfo->goalEntity == NPC->enemy )
                {//we were running after enemy
                        //Try to find a combat point that can hit the enemy
                        int cpFlags = (CP_CLEAR|CP_HAS_ROUTE);
                        int cp;

                        if ( NPCInfo->scriptFlags&SCF_USE_CP_NEAREST )
                        {
                                cpFlags &= ~(CP_FLANK|CP_APPROACH_ENEMY|CP_CLOSEST);
                                cpFlags |= CP_NEAREST;
                        }
                        cp = NPC_FindCombatPoint( NPC->r.currentOrigin, NPC->r.currentOrigin, NPC->r.currentOrigin, cpFlags, 32, -1 );
                        if ( cp == -1 && !(NPCInfo->scriptFlags&SCF_USE_CP_NEAREST) )
                        {//okay, try one by the enemy
                                cp = NPC_FindCombatPoint( NPC->r.currentOrigin, NPC->r.currentOrigin, NPC->enemy->r.currentOrigin, CP_CLEAR|CP_HAS_ROUTE|CP_HORZ_DIST_COLL, 32, -1 );
                        }
                        //NOTE: there may be a perfectly valid one, just not one within CP_COLLECT_RADIUS of either me or him...
                        if ( cp != -1 )
                        {//found a combat point that has a clear shot to enemy
                                NPC_SetCombatPoint( cp );
                                NPC_SetMoveGoal( NPC, level.combatPoints[cp].origin, 8, qtrue, cp, NULL );
                                return moved;
                        }
                }
                //just hang here
                Grenadier_HoldPosition();
        }

        return moved;
}

/*
-------------------------
NPC_BSGrenadier_Patrol
-------------------------
*/

void NPC_BSGrenadier_Patrol( void )
{//FIXME: pick up on bodies of dead buddies?
        if ( NPCInfo->confusionTime < level.time )
        {
                //Look for any enemies
                if ( NPCInfo->scriptFlags&SCF_LOOK_FOR_ENEMIES )
                {
                        if ( NPC_CheckPlayerTeamStealth() )
                        {
                                //NPCInfo->behaviorState = BS_HUNT_AND_KILL;//should be automatic now
                                //NPC_AngerSound();
                                NPC_UpdateAngles( qtrue, qtrue );
                                return;
                        }
                }

                if ( !(NPCInfo->scriptFlags&SCF_IGNORE_ALERTS) )
                {
                        //Is there danger nearby
                        int alertEvent = NPC_CheckAlertEvents( qtrue, qtrue, -1, qfalse, AEL_SUSPICIOUS );
                        if ( NPC_CheckForDanger( alertEvent ) )
                        {
                                NPC_UpdateAngles( qtrue, qtrue );
                                return;
                        }
                        else
                        {//check for other alert events
                                //There is an event to look at
                                if ( alertEvent >= 0 && level.alertEvents[alertEvent].ID != NPCInfo->lastAlertID )
                                {
                                        NPCInfo->lastAlertID = level.alertEvents[alertEvent].ID;
                                        if ( level.alertEvents[alertEvent].level == AEL_DISCOVERED )
                                        {
                                                if ( level.alertEvents[alertEvent].owner && 
                                                        level.alertEvents[alertEvent].owner->client && 
                                                        level.alertEvents[alertEvent].owner->health >= 0 &&
                                                        level.alertEvents[alertEvent].owner->client->playerTeam == NPC->client->enemyTeam )
                                                {//an enemy
                                                        G_SetEnemy( NPC, level.alertEvents[alertEvent].owner );
                                                        //NPCInfo->enemyLastSeenTime = level.time;
                                                        TIMER_Set( NPC, "attackDelay", Q_irand( 500, 2500 ) );
                                                }
                                        }
                                        else
                                        {//FIXME: get more suspicious over time?
                                                //Save the position for movement (if necessary)
                                                VectorCopy( level.alertEvents[alertEvent].position, NPCInfo->investigateGoal );
                                                NPCInfo->investigateDebounceTime = level.time + Q_irand( 500, 1000 );
                                                if ( level.alertEvents[alertEvent].level == AEL_SUSPICIOUS )
                                                {//suspicious looks longer
                                                        NPCInfo->investigateDebounceTime += Q_irand( 500, 2500 );
                                                }
                                        }
                                }
                        }

                        if ( NPCInfo->investigateDebounceTime > level.time )
                        {//FIXME: walk over to it, maybe?  Not if not chase enemies
                                //NOTE: stops walking or doing anything else below
                                vec3_t  dir, angles;
                                float   o_yaw, o_pitch;
                                
                                VectorSubtract( NPCInfo->investigateGoal, NPC->client->renderInfo.eyePoint, dir );
                                vectoangles( dir, angles );
                                
                                o_yaw = NPCInfo->desiredYaw;
                                o_pitch = NPCInfo->desiredPitch;
                                NPCInfo->desiredYaw = angles[YAW];
                                NPCInfo->desiredPitch = angles[PITCH];
                                
                                NPC_UpdateAngles( qtrue, qtrue );

                                NPCInfo->desiredYaw = o_yaw;
                                NPCInfo->desiredPitch = o_pitch;
                                return;
                        }
                }
        }

        //If we have somewhere to go, then do that
        if ( UpdateGoal() )
        {
                ucmd.buttons |= BUTTON_WALKING;
                NPC_MoveToGoal( qtrue );
        }

        NPC_UpdateAngles( qtrue, qtrue );
}

/*
-------------------------
NPC_BSGrenadier_Idle
-------------------------
*/
/*
void NPC_BSGrenadier_Idle( void )
{
        //FIXME: check for other alert events?

        //Is there danger nearby?
        if ( NPC_CheckForDanger( NPC_CheckAlertEvents( qtrue, qtrue, -1, qfalse, AEL_DANGER ) ) )
        {
                NPC_UpdateAngles( qtrue, qtrue );
                return;
        }

        TIMER_Set( NPC, "roamTime", 2000 + Q_irand( 1000, 2000 ) );

        NPC_UpdateAngles( qtrue, qtrue );
}
*/
/*
-------------------------
ST_CheckMoveState
-------------------------
*/

static void Grenadier_CheckMoveState( void )
{
        //See if we're a scout
        if ( !(NPCInfo->scriptFlags & SCF_CHASE_ENEMIES) )//behaviorState == BS_STAND_AND_SHOOT )
        {
                if ( NPCInfo->goalEntity == NPC->enemy )
                {
                        move3 = qfalse;
                        return;
                }
        }
        //See if we're running away
        else if ( NPCInfo->squadState == SQUAD_RETREAT )
        {
                if ( TIMER_Done( NPC, "flee" ) )
                {
                        NPCInfo->squadState = SQUAD_IDLE;
                }
                else
                {
                        faceEnemy3 = qfalse;
                }
        }
        /*
        else if ( NPCInfo->squadState == SQUAD_IDLE )
        {
                if ( !NPCInfo->goalEntity )
                {
                        move3 = qfalse;
                        return;
                }
                //Should keep moving toward player when we're out of range... right?
        }
        */

        //See if we're moving towards a goal, not the enemy
        if ( ( NPCInfo->goalEntity != NPC->enemy ) && ( NPCInfo->goalEntity != NULL ) )
        {
                //Did we make it?
                if ( NAV_HitNavGoal( NPC->r.currentOrigin, NPC->r.mins, NPC->r.maxs, NPCInfo->goalEntity->r.currentOrigin, 16, FlyingCreature( NPC ) ) || 
                        ( NPCInfo->squadState == SQUAD_SCOUT && enemyLOS3 && enemyDist3 <= 10000 ) )
                {
                        int     newSquadState = SQUAD_STAND_AND_SHOOT;
                        //we got where we wanted to go, set timers based on why we were running
                        switch ( NPCInfo->squadState )
                        {
                        case SQUAD_RETREAT://was running away
                                TIMER_Set( NPC, "duck", (NPC->client->pers.maxHealth - NPC->health) * 100 );
                                TIMER_Set( NPC, "hideTime", Q_irand( 3000, 7000 ) );
                                newSquadState = SQUAD_COVER;
                                break;
                        case SQUAD_TRANSITION://was heading for a combat point
                                TIMER_Set( NPC, "hideTime", Q_irand( 2000, 4000 ) );
                                break;
                        case SQUAD_SCOUT://was running after player
                                break;
                        default:
                                break;
                        }
                        NPC_ReachedGoal();
                        //don't attack right away
                        TIMER_Set( NPC, "attackDelay", Q_irand( 250, 500 ) );   //FIXME: Slant for difficulty levels
                        //don't do something else just yet
                        TIMER_Set( NPC, "roamTime", Q_irand( 1000, 4000 ) );
                        //stop fleeing
                        if ( NPCInfo->squadState == SQUAD_RETREAT )
                        {
                                TIMER_Set( NPC, "flee", -level.time );
                                NPCInfo->squadState = SQUAD_IDLE;
                        }
                        return;
                }

                //keep going, hold of roamTimer until we get there
                TIMER_Set( NPC, "roamTime", Q_irand( 4000, 8000 ) );
        }

        if ( !NPCInfo->goalEntity )
        {
                if ( NPCInfo->scriptFlags & SCF_CHASE_ENEMIES )
                {
                        NPCInfo->goalEntity = NPC->enemy;
                }
        }
}

/*
-------------------------
ST_CheckFireState
-------------------------
*/

static void Grenadier_CheckFireState( void )
{
        if ( enemyCS3 )
        {//if have a clear shot, always try
                return;
        }

        if ( NPCInfo->squadState == SQUAD_RETREAT || NPCInfo->squadState == SQUAD_TRANSITION || NPCInfo->squadState == SQUAD_SCOUT )
        {//runners never try to fire at the last pos
                return;
        }

        if ( !VectorCompare( NPC->client->ps.velocity, vec3_origin ) )
        {//if moving at all, don't do this
                return;
        }

        //continue to fire on their last position
        /*
        if ( !Q_irand( 0, 1 ) && NPCInfo->enemyLastSeenTime && level.time - NPCInfo->enemyLastSeenTime < 4000 )
        {
                //Fire on the last known position
                vec3_t  muzzle, dir, angles;

                CalcEntitySpot( NPC, SPOT_WEAPON, muzzle );
                VectorSubtract( NPCInfo->enemyLastSeenLocation, muzzle, dir );

                VectorNormalize( dir );

                vectoangles( dir, angles );

                NPCInfo->desiredYaw             = angles[YAW];
                NPCInfo->desiredPitch   = angles[PITCH];
                //FIXME: they always throw toward enemy, so this will be very odd...
                shoot3 = qtrue;
                faceEnemy3 = qfalse;

                return;
        }
        */
}

qboolean Grenadier_EvaluateShot( int hit )
{
        if ( !NPC->enemy )
        {
                return qfalse;
        }

        if ( hit == NPC->enemy->s.number || (&g_entities[hit] != NULL && (g_entities[hit].r.svFlags&SVF_GLASS_BRUSH)) )
        {//can hit enemy or will hit glass, so shoot anyway
                return qtrue;
        }
        return qfalse;
}

/*
-------------------------
NPC_BSGrenadier_Attack
-------------------------
*/

void NPC_BSGrenadier_Attack( void )
{
        //Don't do anything if we're hurt
        if ( NPC->painDebounceTime > level.time )
        {
                NPC_UpdateAngles( qtrue, qtrue );
                return;
        }

        //NPC_CheckEnemy( qtrue, qfalse );
        //If we don't have an enemy, just idle
        if ( NPC_CheckEnemyExt(qfalse) == qfalse )
        {
                NPC->enemy = NULL;
                NPC_BSGrenadier_Patrol();//FIXME: or patrol?
                return;
        }

        if ( TIMER_Done( NPC, "flee" ) && NPC_CheckForDanger( NPC_CheckAlertEvents( qtrue, qtrue, -1, qfalse, AEL_DANGER ) ) )
        {//going to run
                NPC_UpdateAngles( qtrue, qtrue );
                return;
        }

        if ( !NPC->enemy )
        {//WTF?  somehow we lost our enemy?
                NPC_BSGrenadier_Patrol();//FIXME: or patrol?
                return;
        }

        enemyLOS3 = enemyCS3 = qfalse;
        move3 = qtrue;
        faceEnemy3 = qfalse;
        shoot3 = qfalse;
        enemyDist3 = DistanceSquared( NPC->enemy->r.currentOrigin, NPC->r.currentOrigin );

        //See if we should switch to melee attack
        if ( enemyDist3 < 16384 //128
                && (!NPC->enemy->client
                        || NPC->enemy->client->ps.weapon != WP_SABER
                        || BG_SabersOff( &NPC->enemy->client->ps ) 
                        ) 
                )
        {//enemy is close and not using saber
                if ( NPC->client->ps.weapon == WP_THERMAL )
                {//grenadier
                        trace_t trace;
                        trap_Trace ( &trace, NPC->r.currentOrigin, NPC->enemy->r.mins, NPC->enemy->r.maxs, NPC->enemy->r.currentOrigin, NPC->s.number, NPC->enemy->clipmask );
                        if ( !trace.allsolid && !trace.startsolid && (trace.fraction == 1.0 || trace.entityNum == NPC->enemy->s.number ) )
                        {//I can get right to him
                                //reset fire-timing variables
                                NPC_ChangeWeapon( WP_STUN_BATON );
                                if ( !(NPCInfo->scriptFlags&SCF_CHASE_ENEMIES) )//NPCInfo->behaviorState == BS_STAND_AND_SHOOT )
                                {//FIXME: should we be overriding scriptFlags?
                                        NPCInfo->scriptFlags |= SCF_CHASE_ENEMIES;//NPCInfo->behaviorState = BS_HUNT_AND_KILL;
                                }
                        }
                }
        }
        else if ( enemyDist3 > 65536 || (NPC->enemy->client && NPC->enemy->client->ps.weapon == WP_SABER && !NPC->enemy->client->ps.saberHolstered) )//256
        {//enemy is far or using saber
                if ( NPC->client->ps.weapon == WP_STUN_BATON && (NPC->client->ps.stats[STAT_WEAPONS]&(1<<WP_THERMAL)) )
                {//fisticuffs, make switch to thermal if have it
                        //reset fire-timing variables
                        NPC_ChangeWeapon( WP_THERMAL );
                }
        }

        //can we see our target?
        if ( NPC_ClearLOS4( NPC->enemy ) )
        {
                NPCInfo->enemyLastSeenTime = level.time;
                enemyLOS3 = qtrue;

                if ( NPC->client->ps.weapon == WP_STUN_BATON )
                {
                        if ( enemyDist3 <= 4096 && InFOV3( NPC->enemy->r.currentOrigin, NPC->r.currentOrigin, NPC->client->ps.viewangles, 90, 45 ) )//within 64 & infront
                        {
                                VectorCopy( NPC->enemy->r.currentOrigin, NPCInfo->enemyLastSeenLocation );
                                enemyCS3 = qtrue;
                        }
                }
                else if ( InFOV3( NPC->enemy->r.currentOrigin, NPC->r.currentOrigin, NPC->client->ps.viewangles, 45, 90 ) )
                {//in front of me 
                        //can we shoot our target?
                        //FIXME: how accurate/necessary is this check?
                        int hit = NPC_ShotEntity( NPC->enemy, NULL );
                        gentity_t *hitEnt = &g_entities[hit];
                        if ( hit == NPC->enemy->s.number 
                                || ( hitEnt && hitEnt->client && hitEnt->client->playerTeam == NPC->client->enemyTeam ) )
                        {
                                float enemyHorzDist;

                                VectorCopy( NPC->enemy->r.currentOrigin, NPCInfo->enemyLastSeenLocation );
                                enemyHorzDist = DistanceHorizontalSquared( NPC->enemy->r.currentOrigin, NPC->r.currentOrigin );
                                if ( enemyHorzDist < 1048576 )
                                {//within 1024
                                        enemyCS3 = qtrue;
                                        NPC_AimAdjust( 2 );//adjust aim better longer we have clear shot at enemy
                                }
                                else
                                {
                                        NPC_AimAdjust( 1 );//adjust aim better longer we can see enemy
                                }
                        }
                }
        }
        else
        {
                NPC_AimAdjust( -1 );//adjust aim worse longer we cannot see enemy
        }
        /*
        else if ( trap_InPVS( NPC->enemy->r.currentOrigin, NPC->r.currentOrigin ) )
        {
                NPCInfo->enemyLastSeenTime = level.time;
                faceEnemy3 = qtrue;
        }
        */

        if ( enemyLOS3 )
        {//FIXME: no need to face enemy if we're moving to some other goal and he's too far away to shoot?
                faceEnemy3 = qtrue;
        }

        if ( enemyCS3 )
        {
                shoot3 = qtrue;
                if ( NPC->client->ps.weapon == WP_THERMAL )
                {//don't chase and throw
                        move3 = qfalse;
                }
                else if ( NPC->client->ps.weapon == WP_STUN_BATON && enemyDist3 < (NPC->r.maxs[0]+NPC->enemy->r.maxs[0]+16)*(NPC->r.maxs[0]+NPC->enemy->r.maxs[0]+16) )
                {//close enough
                        move3 = qfalse;
                }
        }//this should make him chase enemy when out of range...?

        //Check for movement to take care of
        Grenadier_CheckMoveState();

        //See if we should override shooting decision with any special considerations
        Grenadier_CheckFireState();

        if ( move3 )
        {//move toward goal
                if ( NPCInfo->goalEntity )//&& ( NPCInfo->goalEntity != NPC->enemy || enemyDist3 > 10000 ) )//100 squared
                {
                        move3 = Grenadier_Move();
                }
                else
                {
                        move3 = qfalse;
                }
        }

        if ( !move3 )
        {
                if ( !TIMER_Done( NPC, "duck" ) )
                {
                        ucmd.upmove = -127;
                }
                //FIXME: what about leaning?
        }
        else
        {//stop ducking!
                TIMER_Set( NPC, "duck", -1 );
        }

        if ( !faceEnemy3 )
        {//we want to face in the dir we're running
                if ( move3 )
                {//don't run away and shoot
                        NPCInfo->desiredYaw = NPCInfo->lastPathAngles[YAW];
                        NPCInfo->desiredPitch = 0;
                        shoot3 = qfalse;
                }
                NPC_UpdateAngles( qtrue, qtrue );
        }
        else// if ( faceEnemy3 )
        {//face the enemy
                NPC_FaceEnemy(qtrue);
        }

        if ( NPCInfo->scriptFlags&SCF_DONT_FIRE )
        {
                shoot3 = qfalse;
        }

        //FIXME: don't shoot right away!
        if ( shoot3 )
        {//try to shoot if it's time
                if ( TIMER_Done( NPC, "attackDelay" ) )
                {       
                        if( !(NPCInfo->scriptFlags & SCF_FIRE_WEAPON) ) // we've already fired, no need to do it again here
                        {
                                WeaponThink( qtrue );
                                TIMER_Set( NPC, "attackDelay", NPCInfo->shotTime-level.time );
                        }
                        
                }
        }
}

void NPC_BSGrenadier_Default( void )
{
        if( NPCInfo->scriptFlags & SCF_FIRE_WEAPON )
        {
                WeaponThink( qtrue );
        }

        if( !NPC->enemy )
        {//don't have an enemy, look for one
                NPC_BSGrenadier_Patrol();
        }
        else//if ( NPC->enemy )
        {//have an enemy
                NPC_BSGrenadier_Attack();
        }
}