cg_weapons.c

quakeIII源码这个不用我多说吧

==========================
CG_NailTrail
==========================
*/
static void CG_PlasmaTrail( centity_t *cent, const weaponInfo_t *wi ) {
	localEntity_t	*le;
	refEntity_t		*re;
	entityState_t	*es;
	vec3_t			velocity, xvelocity, origin;
	vec3_t			offset, xoffset;
	vec3_t			v[3];
	int				t, startTime, step;

	float	waterScale = 1.0f;

	if ( cg_noProjectileTrail.integer || cg_oldPlasma.integer ) {
		return;
	}

	step = 50;

	es = &cent->currentState;
	startTime = cent->trailTime;
	t = step * ( (startTime + step) / step );

	BG_EvaluateTrajectory( &es->pos, cg.time, origin );

	le = CG_AllocLocalEntity();
	re = &le->refEntity;

	velocity[0] = 60 - 120 * crandom();
	velocity[1] = 40 - 80 * crandom();
	velocity[2] = 100 - 200 * crandom();

	le->leType = LE_MOVE_SCALE_FADE;
	le->leFlags = LEF_TUMBLE;
	le->leBounceSoundType = LEBS_NONE;
	le->leMarkType = LEMT_NONE;

	le->startTime = cg.time;
	le->endTime = le->startTime + 600;

	le->pos.trType = TR_GRAVITY;
	le->pos.trTime = cg.time;

	AnglesToAxis( cent->lerpAngles, v );

	offset[0] = 2;
	offset[1] = 2;
	offset[2] = 2;

	xoffset[0] = offset[0] * v[0][0] + offset[1] * v[1][0] + offset[2] * v[2][0];
	xoffset[1] = offset[0] * v[0][1] + offset[1] * v[1][1] + offset[2] * v[2][1];
	xoffset[2] = offset[0] * v[0][2] + offset[1] * v[1][2] + offset[2] * v[2][2];

	VectorAdd( origin, xoffset, re->origin );
	VectorCopy( re->origin, le->pos.trBase );

	if ( CG_PointContents( re->origin, -1 ) & CONTENTS_WATER ) {
		waterScale = 0.10f;
	}

	xvelocity[0] = velocity[0] * v[0][0] + velocity[1] * v[1][0] + velocity[2] * v[2][0];
	xvelocity[1] = velocity[0] * v[0][1] + velocity[1] * v[1][1] + velocity[2] * v[2][1];
	xvelocity[2] = velocity[0] * v[0][2] + velocity[1] * v[1][2] + velocity[2] * v[2][2];
	VectorScale( xvelocity, waterScale, le->pos.trDelta );

	AxisCopy( axisDefault, re->axis );
    re->shaderTime = cg.time / 1000.0f;
    re->reType = RT_SPRITE;
    re->radius = 0.25f;
	re->customShader = cgs.media.railRingsShader;
	le->bounceFactor = 0.3f;

    re->shaderRGBA[0] = wi->flashDlightColor[0] * 63;
    re->shaderRGBA[1] = wi->flashDlightColor[1] * 63;
    re->shaderRGBA[2] = wi->flashDlightColor[2] * 63;
    re->shaderRGBA[3] = 63;

    le->color[0] = wi->flashDlightColor[0] * 0.2;
    le->color[1] = wi->flashDlightColor[1] * 0.2;
    le->color[2] = wi->flashDlightColor[2] * 0.2;
    le->color[3] = 0.25f;

	le->angles.trType = TR_LINEAR;
	le->angles.trTime = cg.time;
	le->angles.trBase[0] = rand()&31;
	le->angles.trBase[1] = rand()&31;
	le->angles.trBase[2] = rand()&31;
	le->angles.trDelta[0] = 1;
	le->angles.trDelta[1] = 0.5;
	le->angles.trDelta[2] = 0;

}
/*
==========================
CG_GrappleTrail
==========================
*/
void CG_GrappleTrail( centity_t *ent, const weaponInfo_t *wi ) {
	vec3_t	origin;
	entityState_t	*es;
	vec3_t			forward, up;
	refEntity_t		beam;

	es = &ent->currentState;

	BG_EvaluateTrajectory( &es->pos, cg.time, origin );
	ent->trailTime = cg.time;

	memset( &beam, 0, sizeof( beam ) );
	//FIXME adjust for muzzle position
	VectorCopy ( cg_entities[ ent->currentState.otherEntityNum ].lerpOrigin, beam.origin );
	beam.origin[2] += 26;
	AngleVectors( cg_entities[ ent->currentState.otherEntityNum ].lerpAngles, forward, NULL, up );
	VectorMA( beam.origin, -6, up, beam.origin );
	VectorCopy( origin, beam.oldorigin );

	if (Distance( beam.origin, beam.oldorigin ) < 64 )
		return; // Don't draw if close

	beam.reType = RT_LIGHTNING;
	beam.customShader = cgs.media.lightningShader;

	AxisClear( beam.axis );
	beam.shaderRGBA[0] = 0xff;
	beam.shaderRGBA[1] = 0xff;
	beam.shaderRGBA[2] = 0xff;
	beam.shaderRGBA[3] = 0xff;
	trap_R_AddRefEntityToScene( &beam );
}

/*
==========================
CG_GrenadeTrail
==========================
*/
static void CG_GrenadeTrail( centity_t *ent, const weaponInfo_t *wi ) {
	CG_RocketTrail( ent, wi );
}


/*
=================
CG_RegisterWeapon

The server says this item is used on this level
=================
*/
void CG_RegisterWeapon( int weaponNum ) {
	weaponInfo_t	*weaponInfo;
	gitem_t			*item, *ammo;
	char			path[MAX_QPATH];
	vec3_t			mins, maxs;
	int				i;

	weaponInfo = &cg_weapons[weaponNum];

	if ( weaponNum == 0 ) {
		return;
	}

	if ( weaponInfo->registered ) {
		return;
	}

	memset( weaponInfo, 0, sizeof( *weaponInfo ) );
	weaponInfo->registered = qtrue;

	for ( item = bg_itemlist + 1 ; item->classname ; item++ ) {
		if ( item->giType == IT_WEAPON && item->giTag == weaponNum ) {
			weaponInfo->item = item;
			break;
		}
	}
	if ( !item->classname ) {
		CG_Error( "Couldn't find weapon %i", weaponNum );
	}
	CG_RegisterItemVisuals( item - bg_itemlist );

	// load cmodel before model so filecache works
	weaponInfo->weaponModel = trap_R_RegisterModel( item->world_model[0] );

	// calc midpoint for rotation
	trap_R_ModelBounds( weaponInfo->weaponModel, mins, maxs );
	for ( i = 0 ; i < 3 ; i++ ) {
		weaponInfo->weaponMidpoint[i] = mins[i] + 0.5 * ( maxs[i] - mins[i] );
	}

	weaponInfo->weaponIcon = trap_R_RegisterShader( item->icon );
	weaponInfo->ammoIcon = trap_R_RegisterShader( item->icon );

	for ( ammo = bg_itemlist + 1 ; ammo->classname ; ammo++ ) {
		if ( ammo->giType == IT_AMMO && ammo->giTag == weaponNum ) {
			break;
		}
	}
	if ( ammo->classname && ammo->world_model[0] ) {
		weaponInfo->ammoModel = trap_R_RegisterModel( ammo->world_model[0] );
	}

	strcpy( path, item->world_model[0] );
	COM_StripExtension( path, path );
	strcat( path, "_flash.md3" );
	weaponInfo->flashModel = trap_R_RegisterModel( path );

	strcpy( path, item->world_model[0] );
	COM_StripExtension( path, path );
	strcat( path, "_barrel.md3" );
	weaponInfo->barrelModel = trap_R_RegisterModel( path );

	strcpy( path, item->world_model[0] );
	COM_StripExtension( path, path );
	strcat( path, "_hand.md3" );
	weaponInfo->handsModel = trap_R_RegisterModel( path );

	if ( !weaponInfo->handsModel ) {
		weaponInfo->handsModel = trap_R_RegisterModel( "models/weapons2/shotgun/shotgun_hand.md3" );
	}

	weaponInfo->loopFireSound = qfalse;

	switch ( weaponNum ) {
	case WP_GAUNTLET:
		MAKERGB( weaponInfo->flashDlightColor, 0.6f, 0.6f, 1.0f );
		weaponInfo->firingSound = trap_S_RegisterSound( "sound/weapons/melee/fstrun.wav", qfalse );
		weaponInfo->flashSound[0] = trap_S_RegisterSound( "sound/weapons/melee/fstatck.wav", qfalse );
		break;

	case WP_LIGHTNING:
		MAKERGB( weaponInfo->flashDlightColor, 0.6f, 0.6f, 1.0f );
		weaponInfo->readySound = trap_S_RegisterSound( "sound/weapons/melee/fsthum.wav", qfalse );
		weaponInfo->firingSound = trap_S_RegisterSound( "sound/weapons/lightning/lg_hum.wav", qfalse );

		weaponInfo->flashSound[0] = trap_S_RegisterSound( "sound/weapons/lightning/lg_fire.wav", qfalse );
		cgs.media.lightningShader = trap_R_RegisterShader( "lightningBoltNew");
		cgs.media.lightningExplosionModel = trap_R_RegisterModel( "models/weaphits/crackle.md3" );
		cgs.media.sfx_lghit1 = trap_S_RegisterSound( "sound/weapons/lightning/lg_hit.wav", qfalse );
		cgs.media.sfx_lghit2 = trap_S_RegisterSound( "sound/weapons/lightning/lg_hit2.wav", qfalse );
		cgs.media.sfx_lghit3 = trap_S_RegisterSound( "sound/weapons/lightning/lg_hit3.wav", qfalse );

		break;

	case WP_GRAPPLING_HOOK:
		MAKERGB( weaponInfo->flashDlightColor, 0.6f, 0.6f, 1.0f );
		weaponInfo->missileModel = trap_R_RegisterModel( "models/ammo/rocket/rocket.md3" );
		weaponInfo->missileTrailFunc = CG_GrappleTrail;
		weaponInfo->missileDlight = 200;
		weaponInfo->wiTrailTime = 2000;
		weaponInfo->trailRadius = 64;
		MAKERGB( weaponInfo->missileDlightColor, 1, 0.75f, 0 );
		weaponInfo->readySound = trap_S_RegisterSound( "sound/weapons/melee/fsthum.wav", qfalse );
		weaponInfo->firingSound = trap_S_RegisterSound( "sound/weapons/melee/fstrun.wav", qfalse );
		break;

#ifdef MISSIONPACK
	case WP_CHAINGUN:
		weaponInfo->firingSound = trap_S_RegisterSound( "sound/weapons/vulcan/wvulfire.wav", qfalse );
		weaponInfo->loopFireSound = qtrue;
		MAKERGB( weaponInfo->flashDlightColor, 1, 1, 0 );
		weaponInfo->flashSound[0] = trap_S_RegisterSound( "sound/weapons/vulcan/vulcanf1b.wav", qfalse );
		weaponInfo->flashSound[1] = trap_S_RegisterSound( "sound/weapons/vulcan/vulcanf2b.wav", qfalse );
		weaponInfo->flashSound[2] = trap_S_RegisterSound( "sound/weapons/vulcan/vulcanf3b.wav", qfalse );
		weaponInfo->flashSound[3] = trap_S_RegisterSound( "sound/weapons/vulcan/vulcanf4b.wav", qfalse );
		weaponInfo->ejectBrassFunc = CG_MachineGunEjectBrass;
		cgs.media.bulletExplosionShader = trap_R_RegisterShader( "bulletExplosion" );
		break;
#endif

	case WP_MACHINEGUN:
		MAKERGB( weaponInfo->flashDlightColor, 1, 1, 0 );
		weaponInfo->flashSound[0] = trap_S_RegisterSound( "sound/weapons/machinegun/machgf1b.wav", qfalse );
		weaponInfo->flashSound[1] = trap_S_RegisterSound( "sound/weapons/machinegun/machgf2b.wav", qfalse );
		weaponInfo->flashSound[2] = trap_S_RegisterSound( "sound/weapons/machinegun/machgf3b.wav", qfalse );
		weaponInfo->flashSound[3] = trap_S_RegisterSound( "sound/weapons/machinegun/machgf4b.wav", qfalse );
		weaponInfo->ejectBrassFunc = CG_MachineGunEjectBrass;
		cgs.media.bulletExplosionShader = trap_R_RegisterShader( "bulletExplosion" );
		break;

	case WP_SHOTGUN:
		MAKERGB( weaponInfo->flashDlightColor, 1, 1, 0 );
		weaponInfo->flashSound[0] = trap_S_RegisterSound( "sound/weapons/shotgun/sshotf1b.wav", qfalse );
		weaponInfo->ejectBrassFunc = CG_ShotgunEjectBrass;
		break;

	case WP_ROCKET_LAUNCHER:
		weaponInfo->missileModel = trap_R_RegisterModel( "models/ammo/rocket/rocket.md3" );
		weaponInfo->missileSound = trap_S_RegisterSound( "sound/weapons/rocket/rockfly.wav", qfalse );
		weaponInfo->missileTrailFunc = CG_RocketTrail;
		weaponInfo->missileDlight = 200;
		weaponInfo->wiTrailTime = 2000;
		weaponInfo->trailRadius = 64;
		
		MAKERGB( weaponInfo->missileDlightColor, 1, 0.75f, 0 );
		MAKERGB( weaponInfo->flashDlightColor, 1, 0.75f, 0 );

		weaponInfo->flashSound[0] = trap_S_RegisterSound( "sound/weapons/rocket/rocklf1a.wav", qfalse );
		cgs.media.rocketExplosionShader = trap_R_RegisterShader( "rocketExplosion" );
		break;

#ifdef MISSIONPACK
	case WP_PROX_LAUNCHER:
		weaponInfo->missileModel = trap_R_RegisterModel( "models/weaphits/proxmine.md3" );
		weaponInfo->missileTrailFunc = CG_GrenadeTrail;
		weaponInfo->wiTrailTime = 700;
		weaponInfo->trailRadius = 32;
		MAKERGB( weaponInfo->flashDlightColor, 1, 0.70f, 0 );
		weaponInfo->flashSound[0] = trap_S_RegisterSound( "sound/weapons/proxmine/wstbfire.wav", qfalse );
		cgs.media.grenadeExplosionShader = trap_R_RegisterShader( "grenadeExplosion" );
		break;
#endif

	case WP_GRENADE_LAUNCHER:
		weaponInfo->missileModel = trap_R_RegisterModel( "models/ammo/grenade1.md3" );
		weaponInfo->missileTrailFunc = CG_GrenadeTrail;
		weaponInfo->wiTrailTime = 700;
		weaponInfo->trailRadius = 32;
		MAKERGB( weaponInfo->flashDlightColor, 1, 0.70f, 0 );
		weaponInfo->flashSound[0] = trap_S_RegisterSound( "sound/weapons/grenade/grenlf1a.wav", qfalse );
		cgs.media.grenadeExplosionShader = trap_R_RegisterShader( "grenadeExplosion" );
		break;

#ifdef MISSIONPACK
	case WP_NAILGUN:
		weaponInfo->ejectBrassFunc = CG_NailgunEjectBrass;
		weaponInfo->missileTrailFunc = CG_NailTrail;
//		weaponInfo->missileSound = trap_S_RegisterSound( "sound/weapons/nailgun/wnalflit.wav", qfalse );
		weaponInfo->trailRadius = 16;
		weaponInfo->wiTrailTime = 250;
		weaponInfo->missileModel = trap_R_RegisterModel( "models/weaphits/nail.md3" );
		MAKERGB( weaponInfo->flashDlightColor, 1, 0.75f, 0 );
		weaponInfo->flashSound[0] = trap_S_RegisterSound( "sound/weapons/nailgun/wnalfire.wav", qfalse );
		break;
#endif

	case WP_PLASMAGUN:
//		weaponInfo->missileModel = cgs.media.invulnerabilityPowerupModel;
		weaponInfo->missileTrailFunc = CG_PlasmaTrail;
		weaponInfo->missileSound = trap_S_RegisterSound( "sound/weapons/plasma/lasfly.wav", qfalse );
		MAKERGB( weaponInfo->flashDlightColor, 0.6f, 0.6f, 1.0f );
		weaponInfo->flashSound[0] = trap_S_RegisterSound( "sound/weapons/plasma/hyprbf1a.wav", qfalse );
		cgs.media.plasmaExplosionShader = trap_R_RegisterShader( "plasmaExplosion" );
		cgs.media.railRingsShader = trap_R_RegisterShader( "railDisc" );
		break;

	case WP_RAILGUN:
		weaponInfo->readySound = trap_S_RegisterSound( "sound/weapons/railgun/rg_hum.wav", qfalse );
		MAKERGB( weaponInfo->flashDlightColor, 1, 0.5f, 0 );
		weaponInfo->flashSound[0] = trap_S_RegisterSound( "sound/weapons/railgun/railgf1a.wav", qfalse );
		cgs.media.railExplosionShader = trap_R_RegisterShader( "railExplosion" );
		cgs.media.railRingsShader = trap_R_RegisterShader( "railDisc" );
		cgs.media.railCoreShader = trap_R_RegisterShader( "railCore" );
		break;

	case WP_BFG:
		weaponInfo->readySound = trap_S_RegisterSound( "sound/weapons/bfg/bfg_hum.wav", qfalse );
		MAKERGB( weaponInfo->flashDlightColor, 1, 0.7f, 1 );
		weaponInfo->flashSound[0] = trap_S_RegisterSound( "sound/weapons/bfg/bfg_fire.wav", qfalse );
		cgs.media.bfgExplosionShader = trap_R_RegisterShader( "bfgExplosion" );
		weaponInfo->missileModel = trap_R_RegisterModel( "models/weaphits/bfg.md3" );
		weaponInfo->missileSound = trap_S_RegisterSound( "sound/weapons/rocket/rockfly.wav", qfalse );
		break;

	 default:
		MAKERGB( weaponInfo->flashDlightColor, 1, 1, 1 );
		weaponInfo->flashSound[0] = trap_S_RegisterSound( "sound/weapons/rocket/rocklf1a.wav", qfalse );
		break;
	}
}

/*
=================
CG_RegisterItemVisuals

The server says this item is used on this level
=================
*/
void CG_RegisterItemVisuals( int itemNum ) {
	itemInfo_t		*itemInfo;
	gitem_t			*item;

	if ( itemNum < 0 || itemNum >= bg_numItems ) {
		CG_Error( "CG_RegisterItemVisuals: itemNum %d out of range [0-%d]", itemNum, bg_numItems-1 );
	}

	itemInfo = &cg_items[ itemNum ];
	if ( itemInfo->registered ) {
		return;
	}

	item = &bg_itemlist[ itemNum ];

	memset( itemInfo, 0, sizeof( &itemInfo ) );
	itemInfo->registered = qtrue;

	itemInfo->models[0] = trap_R_RegisterModel( item->world_model[0] );

	itemInfo->icon = trap_R_RegisterShader( item->icon );

	if ( item->giType == IT_WEAPON ) {
		CG_RegisterWeapon( item->giTag );
	}

	//
	// powerups have an accompanying ring or sphere
	//
	if ( item->giType == IT_POWERUP || item->giType == IT_HEALTH || 
		item->giType == IT_ARMOR || item->giType == IT_HOLDABLE ) {
		if ( item->world_model[1] ) {
			itemInfo->models[1] = trap_R_RegisterModel( item->world_model[1] );
		}
	}
}


/*
========================================================================================

VIEW WEAPON

========================================================================================
*/

/*
=================
CG_MapTorsoToWeaponFrame

=================
*/
static int CG_MapTorsoToWeaponFrame( clientInfo_t *ci, int frame ) {

	// change weapon
	if ( frame >= ci->animations[TORSO_DROP].firstFrame 
		&& frame < ci->animations[TORSO_DROP].firstFrame + 9 ) {
		return frame - ci->animations[TORSO_DROP].firstFrame + 6;
	}

	// stand attack
	if ( frame >= ci->animations[TORSO_ATTACK].firstFrame 
		&& frame < ci->animations[TORSO_ATTACK].firstFrame + 6 ) {
		return 1 + frame - ci->animations[TORSO_ATTACK].firstFrame;
	}

	// stand attack 2
	if ( frame >= ci->animations[TORSO_ATTACK2].firstFrame 
		&& frame < ci->animations[TORSO_ATTACK2].firstFrame + 6 ) {
		return 1 + frame - ci->animations[TORSO_ATTACK2].firstFrame;
	}
	
	return 0;
}


/*
==============
CG_CalculateWeaponPosition