cg_ents.c

quakeIII源码这个不用我多说吧

	s1 = &cent->currentState;
	if ( s1->weapon > WP_NUM_WEAPONS ) {
		s1->weapon = 0;
	}
	weapon = &cg_weapons[s1->weapon];

	// calculate the axis
	VectorCopy( s1->angles, cent->lerpAngles);

#if 0 // FIXME add grapple pull sound here..?
	// add missile sound
	if ( weapon->missileSound ) {
		trap_S_AddLoopingSound( cent->currentState.number, cent->lerpOrigin, vec3_origin, weapon->missileSound );
	}
#endif

	// Will draw cable if needed
	CG_GrappleTrail ( cent, weapon );

	// create the render entity
	memset (&ent, 0, sizeof(ent));
	VectorCopy( cent->lerpOrigin, ent.origin);
	VectorCopy( cent->lerpOrigin, ent.oldorigin);

	// flicker between two skins
	ent.skinNum = cg.clientFrame & 1;
	ent.hModel = weapon->missileModel;
	ent.renderfx = weapon->missileRenderfx | RF_NOSHADOW;

	// convert direction of travel into axis
	if ( VectorNormalize2( s1->pos.trDelta, ent.axis[0] ) == 0 ) {
		ent.axis[0][2] = 1;
	}

	trap_R_AddRefEntityToScene( &ent );
}

/*
===============
CG_Mover
===============
*/
static void CG_Mover( centity_t *cent ) {
	refEntity_t			ent;
	entityState_t		*s1;

	s1 = &cent->currentState;

	// create the render entity
	memset (&ent, 0, sizeof(ent));
	VectorCopy( cent->lerpOrigin, ent.origin);
	VectorCopy( cent->lerpOrigin, ent.oldorigin);
	AnglesToAxis( cent->lerpAngles, ent.axis );

	ent.renderfx = RF_NOSHADOW;

	// flicker between two skins (FIXME?)
	ent.skinNum = ( cg.time >> 6 ) & 1;

	// get the model, either as a bmodel or a modelindex
	if ( s1->solid == SOLID_BMODEL ) {
		ent.hModel = cgs.inlineDrawModel[s1->modelindex];
	} else {
		ent.hModel = cgs.gameModels[s1->modelindex];
	}

	// add to refresh list
	trap_R_AddRefEntityToScene(&ent);

	// add the secondary model
	if ( s1->modelindex2 ) {
		ent.skinNum = 0;
		ent.hModel = cgs.gameModels[s1->modelindex2];
		trap_R_AddRefEntityToScene(&ent);
	}

}

/*
===============
CG_Beam

Also called as an event
===============
*/
void CG_Beam( centity_t *cent ) {
	refEntity_t			ent;
	entityState_t		*s1;

	s1 = &cent->currentState;

	// create the render entity
	memset (&ent, 0, sizeof(ent));
	VectorCopy( s1->pos.trBase, ent.origin );
	VectorCopy( s1->origin2, ent.oldorigin );
	AxisClear( ent.axis );
	ent.reType = RT_BEAM;

	ent.renderfx = RF_NOSHADOW;

	// add to refresh list
	trap_R_AddRefEntityToScene(&ent);
}


/*
===============
CG_Portal
===============
*/
static void CG_Portal( centity_t *cent ) {
	refEntity_t			ent;
	entityState_t		*s1;

	s1 = &cent->currentState;

	// create the render entity
	memset (&ent, 0, sizeof(ent));
	VectorCopy( cent->lerpOrigin, ent.origin );
	VectorCopy( s1->origin2, ent.oldorigin );
	ByteToDir( s1->eventParm, ent.axis[0] );
	PerpendicularVector( ent.axis[1], ent.axis[0] );

	// negating this tends to get the directions like they want
	// we really should have a camera roll value
	VectorSubtract( vec3_origin, ent.axis[1], ent.axis[1] );

	CrossProduct( ent.axis[0], ent.axis[1], ent.axis[2] );
	ent.reType = RT_PORTALSURFACE;
	ent.oldframe = s1->powerups;
	ent.frame = s1->frame;		// rotation speed
	ent.skinNum = s1->clientNum/256.0 * 360;	// roll offset

	// add to refresh list
	trap_R_AddRefEntityToScene(&ent);
}


/*
=========================
CG_AdjustPositionForMover

Also called by client movement prediction code
=========================
*/
void CG_AdjustPositionForMover( const vec3_t in, int moverNum, int fromTime, int toTime, vec3_t out ) {
	centity_t	*cent;
	vec3_t	oldOrigin, origin, deltaOrigin;
	vec3_t	oldAngles, angles, deltaAngles;

	if ( moverNum <= 0 || moverNum >= ENTITYNUM_MAX_NORMAL ) {
		VectorCopy( in, out );
		return;
	}

	cent = &cg_entities[ moverNum ];
	if ( cent->currentState.eType != ET_MOVER ) {
		VectorCopy( in, out );
		return;
	}

	BG_EvaluateTrajectory( &cent->currentState.pos, fromTime, oldOrigin );
	BG_EvaluateTrajectory( &cent->currentState.apos, fromTime, oldAngles );

	BG_EvaluateTrajectory( &cent->currentState.pos, toTime, origin );
	BG_EvaluateTrajectory( &cent->currentState.apos, toTime, angles );

	VectorSubtract( origin, oldOrigin, deltaOrigin );
	VectorSubtract( angles, oldAngles, deltaAngles );

	VectorAdd( in, deltaOrigin, out );

	// FIXME: origin change when on a rotating object
}


/*
=============================
CG_InterpolateEntityPosition
=============================
*/
static void CG_InterpolateEntityPosition( centity_t *cent ) {
	vec3_t		current, next;
	float		f;

	// it would be an internal error to find an entity that interpolates without
	// a snapshot ahead of the current one
	if ( cg.nextSnap == NULL ) {
		CG_Error( "CG_InterpoateEntityPosition: cg.nextSnap == NULL" );
	}

	f = cg.frameInterpolation;

	// this will linearize a sine or parabolic curve, but it is important
	// to not extrapolate player positions if more recent data is available
	BG_EvaluateTrajectory( &cent->currentState.pos, cg.snap->serverTime, current );
	BG_EvaluateTrajectory( &cent->nextState.pos, cg.nextSnap->serverTime, next );

	cent->lerpOrigin[0] = current[0] + f * ( next[0] - current[0] );
	cent->lerpOrigin[1] = current[1] + f * ( next[1] - current[1] );
	cent->lerpOrigin[2] = current[2] + f * ( next[2] - current[2] );

	BG_EvaluateTrajectory( &cent->currentState.apos, cg.snap->serverTime, current );
	BG_EvaluateTrajectory( &cent->nextState.apos, cg.nextSnap->serverTime, next );

	cent->lerpAngles[0] = LerpAngle( current[0], next[0], f );
	cent->lerpAngles[1] = LerpAngle( current[1], next[1], f );
	cent->lerpAngles[2] = LerpAngle( current[2], next[2], f );

}

/*
===============
CG_CalcEntityLerpPositions

===============
*/
static void CG_CalcEntityLerpPositions( centity_t *cent ) {

	// if this player does not want to see extrapolated players
	if ( !cg_smoothClients.integer ) {
		// make sure the clients use TR_INTERPOLATE
		if ( cent->currentState.number < MAX_CLIENTS ) {
			cent->currentState.pos.trType = TR_INTERPOLATE;
			cent->nextState.pos.trType = TR_INTERPOLATE;
		}
	}

	if ( cent->interpolate && cent->currentState.pos.trType == TR_INTERPOLATE ) {
		CG_InterpolateEntityPosition( cent );
		return;
	}

	// first see if we can interpolate between two snaps for
	// linear extrapolated clients
	if ( cent->interpolate && cent->currentState.pos.trType == TR_LINEAR_STOP &&
											cent->currentState.number < MAX_CLIENTS) {
		CG_InterpolateEntityPosition( cent );
		return;
	}

	// just use the current frame and evaluate as best we can
	BG_EvaluateTrajectory( &cent->currentState.pos, cg.time, cent->lerpOrigin );
	BG_EvaluateTrajectory( &cent->currentState.apos, cg.time, cent->lerpAngles );

	// adjust for riding a mover if it wasn't rolled into the predicted
	// player state
	if ( cent != &cg.predictedPlayerEntity ) {
		CG_AdjustPositionForMover( cent->lerpOrigin, cent->currentState.groundEntityNum, 
		cg.snap->serverTime, cg.time, cent->lerpOrigin );
	}
}

/*
===============
CG_TeamBase
===============
*/
static void CG_TeamBase( centity_t *cent ) {
	refEntity_t model;
#ifdef MISSIONPACK
	vec3_t angles;
	int t, h;
	float c;

	if ( cgs.gametype == GT_CTF || cgs.gametype == GT_1FCTF ) {
#else
	if ( cgs.gametype == GT_CTF) {
#endif
		// show the flag base
		memset(&model, 0, sizeof(model));
		model.reType = RT_MODEL;
		VectorCopy( cent->lerpOrigin, model.lightingOrigin );
		VectorCopy( cent->lerpOrigin, model.origin );
		AnglesToAxis( cent->currentState.angles, model.axis );
		if ( cent->currentState.modelindex == TEAM_RED ) {
			model.hModel = cgs.media.redFlagBaseModel;
		}
		else if ( cent->currentState.modelindex == TEAM_BLUE ) {
			model.hModel = cgs.media.blueFlagBaseModel;
		}
		else {
			model.hModel = cgs.media.neutralFlagBaseModel;
		}
		trap_R_AddRefEntityToScene( &model );
	}
#ifdef MISSIONPACK
	else if ( cgs.gametype == GT_OBELISK ) {
		// show the obelisk
		memset(&model, 0, sizeof(model));
		model.reType = RT_MODEL;
		VectorCopy( cent->lerpOrigin, model.lightingOrigin );
		VectorCopy( cent->lerpOrigin, model.origin );
		AnglesToAxis( cent->currentState.angles, model.axis );

		model.hModel = cgs.media.overloadBaseModel;
		trap_R_AddRefEntityToScene( &model );
		// if hit
		if ( cent->currentState.frame == 1) {
			// show hit model
			// modelindex2 is the health value of the obelisk
			c = cent->currentState.modelindex2;
			model.shaderRGBA[0] = 0xff;
			model.shaderRGBA[1] = c;
			model.shaderRGBA[2] = c;
			model.shaderRGBA[3] = 0xff;
			//
			model.hModel = cgs.media.overloadEnergyModel;
			trap_R_AddRefEntityToScene( &model );
		}
		// if respawning
		if ( cent->currentState.frame == 2) {
			if ( !cent->miscTime ) {
				cent->miscTime = cg.time;
			}
			t = cg.time - cent->miscTime;
			h = (cg_obeliskRespawnDelay.integer - 5) * 1000;
			//
			if (t > h) {
				c = (float) (t - h) / h;
				if (c > 1)
					c = 1;
			}
			else {
				c = 0;
			}
			// show the lights
			AnglesToAxis( cent->currentState.angles, model.axis );
			//
			model.shaderRGBA[0] = c * 0xff;
			model.shaderRGBA[1] = c * 0xff;
			model.shaderRGBA[2] = c * 0xff;
			model.shaderRGBA[3] = c * 0xff;

			model.hModel = cgs.media.overloadLightsModel;
			trap_R_AddRefEntityToScene( &model );
			// show the target
			if (t > h) {
				if ( !cent->muzzleFlashTime ) {
					trap_S_StartSound (cent->lerpOrigin, ENTITYNUM_NONE, CHAN_BODY,  cgs.media.obeliskRespawnSound);
					cent->muzzleFlashTime = 1;
				}
				VectorCopy(cent->currentState.angles, angles);
				angles[YAW] += (float) 16 * acos(1-c) * 180 / M_PI;
				AnglesToAxis( angles, model.axis );

				VectorScale( model.axis[0], c, model.axis[0]);
				VectorScale( model.axis[1], c, model.axis[1]);
				VectorScale( model.axis[2], c, model.axis[2]);

				model.shaderRGBA[0] = 0xff;
				model.shaderRGBA[1] = 0xff;
				model.shaderRGBA[2] = 0xff;
				model.shaderRGBA[3] = 0xff;
				//
				model.origin[2] += 56;
				model.hModel = cgs.media.overloadTargetModel;
				trap_R_AddRefEntityToScene( &model );
			}
			else {
				//FIXME: show animated smoke
			}
		}
		else {
			cent->miscTime = 0;
			cent->muzzleFlashTime = 0;
			// modelindex2 is the health value of the obelisk
			c = cent->currentState.modelindex2;
			model.shaderRGBA[0] = 0xff;
			model.shaderRGBA[1] = c;
			model.shaderRGBA[2] = c;
			model.shaderRGBA[3] = 0xff;
			// show the lights
			model.hModel = cgs.media.overloadLightsModel;
			trap_R_AddRefEntityToScene( &model );
			// show the target
			model.origin[2] += 56;
			model.hModel = cgs.media.overloadTargetModel;
			trap_R_AddRefEntityToScene( &model );
		}
	}
	else if ( cgs.gametype == GT_HARVESTER ) {
		// show harvester model
		memset(&model, 0, sizeof(model));
		model.reType = RT_MODEL;
		VectorCopy( cent->lerpOrigin, model.lightingOrigin );
		VectorCopy( cent->lerpOrigin, model.origin );
		AnglesToAxis( cent->currentState.angles, model.axis );

		if ( cent->currentState.modelindex == TEAM_RED ) {
			model.hModel = cgs.media.harvesterModel;
			model.customSkin = cgs.media.harvesterRedSkin;
		}
		else if ( cent->currentState.modelindex == TEAM_BLUE ) {
			model.hModel = cgs.media.harvesterModel;
			model.customSkin = cgs.media.harvesterBlueSkin;
		}
		else {
			model.hModel = cgs.media.harvesterNeutralModel;
			model.customSkin = 0;
		}
		trap_R_AddRefEntityToScene( &model );
	}
#endif
}

/*
===============
CG_AddCEntity

===============
*/
static void CG_AddCEntity( centity_t *cent ) {
	// event-only entities will have been dealt with already
	if ( cent->currentState.eType >= ET_EVENTS ) {
		return;
	}

	// calculate the current origin
	CG_CalcEntityLerpPositions( cent );

	// add automatic effects
	CG_EntityEffects( cent );

	switch ( cent->currentState.eType ) {
	default:
		CG_Error( "Bad entity type: %i\n", cent->currentState.eType );
		break;
	case ET_INVISIBLE:
	case ET_PUSH_TRIGGER:
	case ET_TELEPORT_TRIGGER:
		break;
	case ET_GENERAL:
		CG_General( cent );
		break;
	case ET_PLAYER:
		CG_Player( cent );
		break;
	case ET_ITEM:
		CG_Item( cent );
		break;
	case ET_MISSILE:
		CG_Missile( cent );
		break;
	case ET_MOVER:
		CG_Mover( cent );
		break;
	case ET_BEAM:
		CG_Beam( cent );
		break;
	case ET_PORTAL:
		CG_Portal( cent );
		break;
	case ET_SPEAKER:
		CG_Speaker( cent );
		break;
	case ET_GRAPPLE:
		CG_Grapple( cent );
		break;
	case ET_TEAM:
		CG_TeamBase( cent );
		break;
	}
}

/*
===============
CG_AddPacketEntities

===============
*/
void CG_AddPacketEntities( void ) {
	int					num;
	centity_t			*cent;
	playerState_t		*ps;

	// set cg.frameInterpolation
	if ( cg.nextSnap ) {
		int		delta;

		delta = (cg.nextSnap->serverTime - cg.snap->serverTime);
		if ( delta == 0 ) {
			cg.frameInterpolation = 0;
		} else {
			cg.frameInterpolation = (float)( cg.time - cg.snap->serverTime ) / delta;
		}
	} else {
		cg.frameInterpolation = 0;	// actually, it should never be used, because 
									// no entities should be marked as interpolating
	}

	// the auto-rotating items will all have the same axis
	cg.autoAngles[0] = 0;
	cg.autoAngles[1] = ( cg.time & 2047 ) * 360 / 2048.0;
	cg.autoAngles[2] = 0;

	cg.autoAnglesFast[0] = 0;
	cg.autoAnglesFast[1] = ( cg.time & 1023 ) * 360 / 1024.0f;
	cg.autoAnglesFast[2] = 0;

	AnglesToAxis( cg.autoAngles, cg.autoAxis );
	AnglesToAxis( cg.autoAnglesFast, cg.autoAxisFast );

	// generate and add the entity from the playerstate
	ps = &cg.predictedPlayerState;
	BG_PlayerStateToEntityState( ps, &cg.predictedPlayerEntity.currentState, qfalse );
	CG_AddCEntity( &cg.predictedPlayerEntity );

	// lerp the non-predicted value for lightning gun origins
	CG_CalcEntityLerpPositions( &cg_entities[ cg.snap->ps.clientNum ] );

	// add each entity sent over by the server
	for ( num = 0 ; num < cg.snap->numEntities ; num++ ) {
		cent = &cg_entities[ cg.snap->entities[ num ].number ];
		CG_AddCEntity( cent );
	}
}