bg_misc.c

quakeIII源码这个不用我多说吧

		else {
			upperBound = ps->stats[STAT_MAX_HEALTH] * 2;
		}

		if ( ps->stats[STAT_ARMOR] >= upperBound ) {
			return qfalse;
		}
#else
		if ( ps->stats[STAT_ARMOR] >= ps->stats[STAT_MAX_HEALTH] * 2 ) {
			return qfalse;
		}
#endif
		return qtrue;

	case IT_HEALTH:
		// small and mega healths will go over the max, otherwise
		// don't pick up if already at max
#ifdef MISSIONPACK
		if( bg_itemlist[ps->stats[STAT_PERSISTANT_POWERUP]].giTag == PW_GUARD ) {
			upperBound = ps->stats[STAT_MAX_HEALTH];
		}
		else
#endif
		if ( item->quantity == 5 || item->quantity == 100 ) {
			if ( ps->stats[STAT_HEALTH] >= ps->stats[STAT_MAX_HEALTH] * 2 ) {
				return qfalse;
			}
			return qtrue;
		}

		if ( ps->stats[STAT_HEALTH] >= ps->stats[STAT_MAX_HEALTH] ) {
			return qfalse;
		}
		return qtrue;

	case IT_POWERUP:
		return qtrue;	// powerups are always picked up

#ifdef MISSIONPACK
	case IT_PERSISTANT_POWERUP:
		// can only hold one item at a time
		if ( ps->stats[STAT_PERSISTANT_POWERUP] ) {
			return qfalse;
		}

		// check team only
		if( ( ent->generic1 & 2 ) && ( ps->persistant[PERS_TEAM] != TEAM_RED ) ) {
			return qfalse;
		}
		if( ( ent->generic1 & 4 ) && ( ps->persistant[PERS_TEAM] != TEAM_BLUE ) ) {
			return qfalse;
		}

		return qtrue;
#endif

	case IT_TEAM: // team items, such as flags
#ifdef MISSIONPACK		
		if( gametype == GT_1FCTF ) {
			// neutral flag can always be picked up
			if( item->giTag == PW_NEUTRALFLAG ) {
				return qtrue;
			}
			if (ps->persistant[PERS_TEAM] == TEAM_RED) {
				if (item->giTag == PW_BLUEFLAG  && ps->powerups[PW_NEUTRALFLAG] ) {
					return qtrue;
				}
			} else if (ps->persistant[PERS_TEAM] == TEAM_BLUE) {
				if (item->giTag == PW_REDFLAG  && ps->powerups[PW_NEUTRALFLAG] ) {
					return qtrue;
				}
			}
		}
#endif
		if( gametype == GT_CTF ) {
			// ent->modelindex2 is non-zero on items if they are dropped
			// we need to know this because we can pick up our dropped flag (and return it)
			// but we can't pick up our flag at base
			if (ps->persistant[PERS_TEAM] == TEAM_RED) {
				if (item->giTag == PW_BLUEFLAG ||
					(item->giTag == PW_REDFLAG && ent->modelindex2) ||
					(item->giTag == PW_REDFLAG && ps->powerups[PW_BLUEFLAG]) )
					return qtrue;
			} else if (ps->persistant[PERS_TEAM] == TEAM_BLUE) {
				if (item->giTag == PW_REDFLAG ||
					(item->giTag == PW_BLUEFLAG && ent->modelindex2) ||
					(item->giTag == PW_BLUEFLAG && ps->powerups[PW_REDFLAG]) )
					return qtrue;
			}
		}

#ifdef MISSIONPACK
		if( gametype == GT_HARVESTER ) {
			return qtrue;
		}
#endif
		return qfalse;

	case IT_HOLDABLE:
		// can only hold one item at a time
		if ( ps->stats[STAT_HOLDABLE_ITEM] ) {
			return qfalse;
		}
		return qtrue;

        case IT_BAD:
            Com_Error( ERR_DROP, "BG_CanItemBeGrabbed: IT_BAD" );
        default:
#ifndef Q3_VM
#ifndef NDEBUG // bk0001204
          Com_Printf("BG_CanItemBeGrabbed: unknown enum %d\n", item->giType );
#endif
#endif
         break;
	}

	return qfalse;
}

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

/*
================
BG_EvaluateTrajectory

================
*/
void BG_EvaluateTrajectory( const trajectory_t *tr, int atTime, vec3_t result ) {
	float		deltaTime;
	float		phase;

	switch( tr->trType ) {
	case TR_STATIONARY:
	case TR_INTERPOLATE:
		VectorCopy( tr->trBase, result );
		break;
	case TR_LINEAR:
		deltaTime = ( atTime - tr->trTime ) * 0.001;	// milliseconds to seconds
		VectorMA( tr->trBase, deltaTime, tr->trDelta, result );
		break;
	case TR_SINE:
		deltaTime = ( atTime - tr->trTime ) / (float) tr->trDuration;
		phase = sin( deltaTime * M_PI * 2 );
		VectorMA( tr->trBase, phase, tr->trDelta, result );
		break;
	case TR_LINEAR_STOP:
		if ( atTime > tr->trTime + tr->trDuration ) {
			atTime = tr->trTime + tr->trDuration;
		}
		deltaTime = ( atTime - tr->trTime ) * 0.001;	// milliseconds to seconds
		if ( deltaTime < 0 ) {
			deltaTime = 0;
		}
		VectorMA( tr->trBase, deltaTime, tr->trDelta, result );
		break;
	case TR_GRAVITY:
		deltaTime = ( atTime - tr->trTime ) * 0.001;	// milliseconds to seconds
		VectorMA( tr->trBase, deltaTime, tr->trDelta, result );
		result[2] -= 0.5 * DEFAULT_GRAVITY * deltaTime * deltaTime;		// FIXME: local gravity...
		break;
	default:
		Com_Error( ERR_DROP, "BG_EvaluateTrajectory: unknown trType: %i", tr->trTime );
		break;
	}
}

/*
================
BG_EvaluateTrajectoryDelta

For determining velocity at a given time
================
*/
void BG_EvaluateTrajectoryDelta( const trajectory_t *tr, int atTime, vec3_t result ) {
	float	deltaTime;
	float	phase;

	switch( tr->trType ) {
	case TR_STATIONARY:
	case TR_INTERPOLATE:
		VectorClear( result );
		break;
	case TR_LINEAR:
		VectorCopy( tr->trDelta, result );
		break;
	case TR_SINE:
		deltaTime = ( atTime - tr->trTime ) / (float) tr->trDuration;
		phase = cos( deltaTime * M_PI * 2 );	// derivative of sin = cos
		phase *= 0.5;
		VectorScale( tr->trDelta, phase, result );
		break;
	case TR_LINEAR_STOP:
		if ( atTime > tr->trTime + tr->trDuration ) {
			VectorClear( result );
			return;
		}
		VectorCopy( tr->trDelta, result );
		break;
	case TR_GRAVITY:
		deltaTime = ( atTime - tr->trTime ) * 0.001;	// milliseconds to seconds
		VectorCopy( tr->trDelta, result );
		result[2] -= DEFAULT_GRAVITY * deltaTime;		// FIXME: local gravity...
		break;
	default:
		Com_Error( ERR_DROP, "BG_EvaluateTrajectoryDelta: unknown trType: %i", tr->trTime );
		break;
	}
}

char *eventnames[] = {
	"EV_NONE",

	"EV_FOOTSTEP",
	"EV_FOOTSTEP_METAL",
	"EV_FOOTSPLASH",
	"EV_FOOTWADE",
	"EV_SWIM",

	"EV_STEP_4",
	"EV_STEP_8",
	"EV_STEP_12",
	"EV_STEP_16",

	"EV_FALL_SHORT",
	"EV_FALL_MEDIUM",
	"EV_FALL_FAR",

	"EV_JUMP_PAD",			// boing sound at origin", jump sound on player

	"EV_JUMP",
	"EV_WATER_TOUCH",	// foot touches
	"EV_WATER_LEAVE",	// foot leaves
	"EV_WATER_UNDER",	// head touches
	"EV_WATER_CLEAR",	// head leaves

	"EV_ITEM_PICKUP",			// normal item pickups are predictable
	"EV_GLOBAL_ITEM_PICKUP",	// powerup / team sounds are broadcast to everyone

	"EV_NOAMMO",
	"EV_CHANGE_WEAPON",
	"EV_FIRE_WEAPON",

	"EV_USE_ITEM0",
	"EV_USE_ITEM1",
	"EV_USE_ITEM2",
	"EV_USE_ITEM3",
	"EV_USE_ITEM4",
	"EV_USE_ITEM5",
	"EV_USE_ITEM6",
	"EV_USE_ITEM7",
	"EV_USE_ITEM8",
	"EV_USE_ITEM9",
	"EV_USE_ITEM10",
	"EV_USE_ITEM11",
	"EV_USE_ITEM12",
	"EV_USE_ITEM13",
	"EV_USE_ITEM14",
	"EV_USE_ITEM15",

	"EV_ITEM_RESPAWN",
	"EV_ITEM_POP",
	"EV_PLAYER_TELEPORT_IN",
	"EV_PLAYER_TELEPORT_OUT",

	"EV_GRENADE_BOUNCE",		// eventParm will be the soundindex

	"EV_GENERAL_SOUND",
	"EV_GLOBAL_SOUND",		// no attenuation
	"EV_GLOBAL_TEAM_SOUND",

	"EV_BULLET_HIT_FLESH",
	"EV_BULLET_HIT_WALL",

	"EV_MISSILE_HIT",
	"EV_MISSILE_MISS",
	"EV_MISSILE_MISS_METAL",
	"EV_RAILTRAIL",
	"EV_SHOTGUN",
	"EV_BULLET",				// otherEntity is the shooter

	"EV_PAIN",
	"EV_DEATH1",
	"EV_DEATH2",
	"EV_DEATH3",
	"EV_OBITUARY",

	"EV_POWERUP_QUAD",
	"EV_POWERUP_BATTLESUIT",
	"EV_POWERUP_REGEN",

	"EV_GIB_PLAYER",			// gib a previously living player
	"EV_SCOREPLUM",			// score plum

//#ifdef MISSIONPACK
	"EV_PROXIMITY_MINE_STICK",
	"EV_PROXIMITY_MINE_TRIGGER",
	"EV_KAMIKAZE",			// kamikaze explodes
	"EV_OBELISKEXPLODE",		// obelisk explodes
	"EV_INVUL_IMPACT",		// invulnerability sphere impact
	"EV_JUICED",				// invulnerability juiced effect
	"EV_LIGHTNINGBOLT",		// lightning bolt bounced of invulnerability sphere
//#endif

	"EV_DEBUG_LINE",
	"EV_STOPLOOPINGSOUND",
	"EV_TAUNT"

};

/*
===============
BG_AddPredictableEventToPlayerstate

Handles the sequence numbers
===============
*/

void	trap_Cvar_VariableStringBuffer( const char *var_name, char *buffer, int bufsize );

void BG_AddPredictableEventToPlayerstate( int newEvent, int eventParm, playerState_t *ps ) {

#ifdef _DEBUG
	{
		char buf[256];
		trap_Cvar_VariableStringBuffer("showevents", buf, sizeof(buf));
		if ( atof(buf) != 0 ) {
#ifdef QAGAME
			Com_Printf(" game event svt %5d -> %5d: num = %20s parm %d\n", ps->pmove_framecount/*ps->commandTime*/, ps->eventSequence, eventnames[newEvent], eventParm);
#else
			Com_Printf("Cgame event svt %5d -> %5d: num = %20s parm %d\n", ps->pmove_framecount/*ps->commandTime*/, ps->eventSequence, eventnames[newEvent], eventParm);
#endif
		}
	}
#endif
	ps->events[ps->eventSequence & (MAX_PS_EVENTS-1)] = newEvent;
	ps->eventParms[ps->eventSequence & (MAX_PS_EVENTS-1)] = eventParm;
	ps->eventSequence++;
}

/*
========================
BG_TouchJumpPad
========================
*/
void BG_TouchJumpPad( playerState_t *ps, entityState_t *jumppad ) {
	vec3_t	angles;
	float p;
	int effectNum;

	// spectators don't use jump pads
	if ( ps->pm_type != PM_NORMAL ) {
		return;
	}

	// flying characters don't hit bounce pads
	if ( ps->powerups[PW_FLIGHT] ) {
		return;
	}

	// if we didn't hit this same jumppad the previous frame
	// then don't play the event sound again if we are in a fat trigger
	if ( ps->jumppad_ent != jumppad->number ) {

		vectoangles( jumppad->origin2, angles);
		p = fabs( AngleNormalize180( angles[PITCH] ) );
		if( p < 45 ) {
			effectNum = 0;
		} else {
			effectNum = 1;
		}
		BG_AddPredictableEventToPlayerstate( EV_JUMP_PAD, effectNum, ps );
	}
	// remember hitting this jumppad this frame
	ps->jumppad_ent = jumppad->number;
	ps->jumppad_frame = ps->pmove_framecount;
	// give the player the velocity from the jumppad
	VectorCopy( jumppad->origin2, ps->velocity );
}

/*
========================
BG_PlayerStateToEntityState

This is done after each set of usercmd_t on the server,
and after local prediction on the client
========================
*/
void BG_PlayerStateToEntityState( playerState_t *ps, entityState_t *s, qboolean snap ) {
	int		i;

	if ( ps->pm_type == PM_INTERMISSION || ps->pm_type == PM_SPECTATOR ) {
		s->eType = ET_INVISIBLE;
	} else if ( ps->stats[STAT_HEALTH] <= GIB_HEALTH ) {
		s->eType = ET_INVISIBLE;
	} else {
		s->eType = ET_PLAYER;
	}

	s->number = ps->clientNum;

	s->pos.trType = TR_INTERPOLATE;
	VectorCopy( ps->origin, s->pos.trBase );
	if ( snap ) {
		SnapVector( s->pos.trBase );
	}
	// set the trDelta for flag direction
	VectorCopy( ps->velocity, s->pos.trDelta );

	s->apos.trType = TR_INTERPOLATE;
	VectorCopy( ps->viewangles, s->apos.trBase );
	if ( snap ) {
		SnapVector( s->apos.trBase );
	}

	s->angles2[YAW] = ps->movementDir;
	s->legsAnim = ps->legsAnim;
	s->torsoAnim = ps->torsoAnim;
	s->clientNum = ps->clientNum;		// ET_PLAYER looks here instead of at number
										// so corpses can also reference the proper config
	s->eFlags = ps->eFlags;
	if ( ps->stats[STAT_HEALTH] <= 0 ) {
		s->eFlags |= EF_DEAD;
	} else {
		s->eFlags &= ~EF_DEAD;
	}

	if ( ps->externalEvent ) {
		s->event = ps->externalEvent;
		s->eventParm = ps->externalEventParm;
	} else if ( ps->entityEventSequence < ps->eventSequence ) {
		int		seq;

		if ( ps->entityEventSequence < ps->eventSequence - MAX_PS_EVENTS) {
			ps->entityEventSequence = ps->eventSequence - MAX_PS_EVENTS;
		}
		seq = ps->entityEventSequence & (MAX_PS_EVENTS-1);
		s->event = ps->events[ seq ] | ( ( ps->entityEventSequence & 3 ) << 8 );
		s->eventParm = ps->eventParms[ seq ];
		ps->entityEventSequence++;
	}

	s->weapon = ps->weapon;
	s->groundEntityNum = ps->groundEntityNum;

	s->powerups = 0;
	for ( i = 0 ; i < MAX_POWERUPS ; i++ ) {
		if ( ps->powerups[ i ] ) {
			s->powerups |= 1 << i;
		}
	}

	s->loopSound = ps->loopSound;
	s->generic1 = ps->generic1;
}

/*
========================
BG_PlayerStateToEntityStateExtraPolate

This is done after each set of usercmd_t on the server,
and after local prediction on the client
========================
*/
void BG_PlayerStateToEntityStateExtraPolate( playerState_t *ps, entityState_t *s, int time, qboolean snap ) {
	int		i;

	if ( ps->pm_type == PM_INTERMISSION || ps->pm_type == PM_SPECTATOR ) {
		s->eType = ET_INVISIBLE;
	} else if ( ps->stats[STAT_HEALTH] <= GIB_HEALTH ) {
		s->eType = ET_INVISIBLE;
	} else {
		s->eType = ET_PLAYER;
	}

	s->number = ps->clientNum;

	s->pos.trType = TR_LINEAR_STOP;
	VectorCopy( ps->origin, s->pos.trBase );
	if ( snap ) {
		SnapVector( s->pos.trBase );
	}
	// set the trDelta for flag direction and linear prediction
	VectorCopy( ps->velocity, s->pos.trDelta );
	// set the time for linear prediction
	s->pos.trTime = time;
	// set maximum extra polation time
	s->pos.trDuration = 50; // 1000 / sv_fps (default = 20)

	s->apos.trType = TR_INTERPOLATE;
	VectorCopy( ps->viewangles, s->apos.trBase );
	if ( snap ) {
		SnapVector( s->apos.trBase );
	}

	s->angles2[YAW] = ps->movementDir;
	s->legsAnim = ps->legsAnim;
	s->torsoAnim = ps->torsoAnim;
	s->clientNum = ps->clientNum;		// ET_PLAYER looks here instead of at number
										// so corpses can also reference the proper config
	s->eFlags = ps->eFlags;
	if ( ps->stats[STAT_HEALTH] <= 0 ) {
		s->eFlags |= EF_DEAD;
	} else {
		s->eFlags &= ~EF_DEAD;
	}

	if ( ps->externalEvent ) {
		s->event = ps->externalEvent;
		s->eventParm = ps->externalEventParm;
	} else if ( ps->entityEventSequence < ps->eventSequence ) {
		int		seq;

		if ( ps->entityEventSequence < ps->eventSequence - MAX_PS_EVENTS) {
			ps->entityEventSequence = ps->eventSequence - MAX_PS_EVENTS;
		}
		seq = ps->entityEventSequence & (MAX_PS_EVENTS-1);
		s->event = ps->events[ seq ] | ( ( ps->entityEventSequence & 3 ) << 8 );
		s->eventParm = ps->eventParms[ seq ];
		ps->entityEventSequence++;
	}

	s->weapon = ps->weapon;
	s->groundEntityNum = ps->groundEntityNum;

	s->powerups = 0;
	for ( i = 0 ; i < MAX_POWERUPS ; i++ ) {
		if ( ps->powerups[ i ] ) {
			s->powerups |= 1 << i;
		}
	}

	s->loopSound = ps->loopSound;
	s->generic1 = ps->generic1;
}