cg_players.c

quakeIII源码这个不用我多说吧

	ent.reType = RT_SPRITE;
	ent.customShader = shader;
	ent.radius = 10;
	ent.renderfx = rf;
	ent.shaderRGBA[0] = 255;
	ent.shaderRGBA[1] = 255;
	ent.shaderRGBA[2] = 255;
	ent.shaderRGBA[3] = 255;
	trap_R_AddRefEntityToScene( &ent );
}



/*
===============
CG_PlayerSprites

Float sprites over the player's head
===============
*/
static void CG_PlayerSprites( centity_t *cent ) {
	int		team;

	if ( cent->currentState.eFlags & EF_CONNECTION ) {
		CG_PlayerFloatSprite( cent, cgs.media.connectionShader );
		return;
	}

	if ( cent->currentState.eFlags & EF_TALK ) {
		CG_PlayerFloatSprite( cent, cgs.media.balloonShader );
		return;
	}

	if ( cent->currentState.eFlags & EF_AWARD_IMPRESSIVE ) {
		CG_PlayerFloatSprite( cent, cgs.media.medalImpressive );
		return;
	}

	if ( cent->currentState.eFlags & EF_AWARD_EXCELLENT ) {
		CG_PlayerFloatSprite( cent, cgs.media.medalExcellent );
		return;
	}

	if ( cent->currentState.eFlags & EF_AWARD_GAUNTLET ) {
		CG_PlayerFloatSprite( cent, cgs.media.medalGauntlet );
		return;
	}

	if ( cent->currentState.eFlags & EF_AWARD_DEFEND ) {
		CG_PlayerFloatSprite( cent, cgs.media.medalDefend );
		return;
	}

	if ( cent->currentState.eFlags & EF_AWARD_ASSIST ) {
		CG_PlayerFloatSprite( cent, cgs.media.medalAssist );
		return;
	}

	if ( cent->currentState.eFlags & EF_AWARD_CAP ) {
		CG_PlayerFloatSprite( cent, cgs.media.medalCapture );
		return;
	}

	team = cgs.clientinfo[ cent->currentState.clientNum ].team;
	if ( !(cent->currentState.eFlags & EF_DEAD) && 
		cg.snap->ps.persistant[PERS_TEAM] == team &&
		cgs.gametype >= GT_TEAM) {
		if (cg_drawFriend.integer) {
			CG_PlayerFloatSprite( cent, cgs.media.friendShader );
		}
		return;
	}
}

/*
===============
CG_PlayerShadow

Returns the Z component of the surface being shadowed

  should it return a full plane instead of a Z?
===============
*/
#define	SHADOW_DISTANCE		128
static qboolean CG_PlayerShadow( centity_t *cent, float *shadowPlane ) {
	vec3_t		end, mins = {-15, -15, 0}, maxs = {15, 15, 2};
	trace_t		trace;
	float		alpha;

	*shadowPlane = 0;

	if ( cg_shadows.integer == 0 ) {
		return qfalse;
	}

	// no shadows when invisible
	if ( cent->currentState.powerups & ( 1 << PW_INVIS ) ) {
		return qfalse;
	}

	// send a trace down from the player to the ground
	VectorCopy( cent->lerpOrigin, end );
	end[2] -= SHADOW_DISTANCE;

	trap_CM_BoxTrace( &trace, cent->lerpOrigin, end, mins, maxs, 0, MASK_PLAYERSOLID );

	// no shadow if too high
	if ( trace.fraction == 1.0 || trace.startsolid || trace.allsolid ) {
		return qfalse;
	}

	*shadowPlane = trace.endpos[2] + 1;

	if ( cg_shadows.integer != 1 ) {	// no mark for stencil or projection shadows
		return qtrue;
	}

	// fade the shadow out with height
	alpha = 1.0 - trace.fraction;

	// bk0101022 - hack / FPE - bogus planes?
	//assert( DotProduct( trace.plane.normal, trace.plane.normal ) != 0.0f ) 

	// add the mark as a temporary, so it goes directly to the renderer
	// without taking a spot in the cg_marks array
	CG_ImpactMark( cgs.media.shadowMarkShader, trace.endpos, trace.plane.normal, 
		cent->pe.legs.yawAngle, alpha,alpha,alpha,1, qfalse, 24, qtrue );

	return qtrue;
}


/*
===============
CG_PlayerSplash

Draw a mark at the water surface
===============
*/
static void CG_PlayerSplash( centity_t *cent ) {
	vec3_t		start, end;
	trace_t		trace;
	int			contents;
	polyVert_t	verts[4];

	if ( !cg_shadows.integer ) {
		return;
	}

	VectorCopy( cent->lerpOrigin, end );
	end[2] -= 24;

	// if the feet aren't in liquid, don't make a mark
	// this won't handle moving water brushes, but they wouldn't draw right anyway...
	contents = trap_CM_PointContents( end, 0 );
	if ( !( contents & ( CONTENTS_WATER | CONTENTS_SLIME | CONTENTS_LAVA ) ) ) {
		return;
	}

	VectorCopy( cent->lerpOrigin, start );
	start[2] += 32;

	// if the head isn't out of liquid, don't make a mark
	contents = trap_CM_PointContents( start, 0 );
	if ( contents & ( CONTENTS_SOLID | CONTENTS_WATER | CONTENTS_SLIME | CONTENTS_LAVA ) ) {
		return;
	}

	// trace down to find the surface
	trap_CM_BoxTrace( &trace, start, end, NULL, NULL, 0, ( CONTENTS_WATER | CONTENTS_SLIME | CONTENTS_LAVA ) );

	if ( trace.fraction == 1.0 ) {
		return;
	}

	// create a mark polygon
	VectorCopy( trace.endpos, verts[0].xyz );
	verts[0].xyz[0] -= 32;
	verts[0].xyz[1] -= 32;
	verts[0].st[0] = 0;
	verts[0].st[1] = 0;
	verts[0].modulate[0] = 255;
	verts[0].modulate[1] = 255;
	verts[0].modulate[2] = 255;
	verts[0].modulate[3] = 255;

	VectorCopy( trace.endpos, verts[1].xyz );
	verts[1].xyz[0] -= 32;
	verts[1].xyz[1] += 32;
	verts[1].st[0] = 0;
	verts[1].st[1] = 1;
	verts[1].modulate[0] = 255;
	verts[1].modulate[1] = 255;
	verts[1].modulate[2] = 255;
	verts[1].modulate[3] = 255;

	VectorCopy( trace.endpos, verts[2].xyz );
	verts[2].xyz[0] += 32;
	verts[2].xyz[1] += 32;
	verts[2].st[0] = 1;
	verts[2].st[1] = 1;
	verts[2].modulate[0] = 255;
	verts[2].modulate[1] = 255;
	verts[2].modulate[2] = 255;
	verts[2].modulate[3] = 255;

	VectorCopy( trace.endpos, verts[3].xyz );
	verts[3].xyz[0] += 32;
	verts[3].xyz[1] -= 32;
	verts[3].st[0] = 1;
	verts[3].st[1] = 0;
	verts[3].modulate[0] = 255;
	verts[3].modulate[1] = 255;
	verts[3].modulate[2] = 255;
	verts[3].modulate[3] = 255;

	trap_R_AddPolyToScene( cgs.media.wakeMarkShader, 4, verts );
}



/*
===============
CG_AddRefEntityWithPowerups

Adds a piece with modifications or duplications for powerups
Also called by CG_Missile for quad rockets, but nobody can tell...
===============
*/
void CG_AddRefEntityWithPowerups( refEntity_t *ent, entityState_t *state, int team ) {

	if ( state->powerups & ( 1 << PW_INVIS ) ) {
		ent->customShader = cgs.media.invisShader;
		trap_R_AddRefEntityToScene( ent );
	} else {
		/*
		if ( state->eFlags & EF_KAMIKAZE ) {
			if (team == TEAM_BLUE)
				ent->customShader = cgs.media.blueKamikazeShader;
			else
				ent->customShader = cgs.media.redKamikazeShader;
			trap_R_AddRefEntityToScene( ent );
		}
		else {*/
			trap_R_AddRefEntityToScene( ent );
		//}

		if ( state->powerups & ( 1 << PW_QUAD ) )
		{
			if (team == TEAM_RED)
				ent->customShader = cgs.media.redQuadShader;
			else
				ent->customShader = cgs.media.quadShader;
			trap_R_AddRefEntityToScene( ent );
		}
		if ( state->powerups & ( 1 << PW_REGEN ) ) {
			if ( ( ( cg.time / 100 ) % 10 ) == 1 ) {
				ent->customShader = cgs.media.regenShader;
				trap_R_AddRefEntityToScene( ent );
			}
		}
		if ( state->powerups & ( 1 << PW_BATTLESUIT ) ) {
			ent->customShader = cgs.media.battleSuitShader;
			trap_R_AddRefEntityToScene( ent );
		}
	}
}

/*
=================
CG_LightVerts
=================
*/
int CG_LightVerts( vec3_t normal, int numVerts, polyVert_t *verts )
{
	int				i, j;
	float			incoming;
	vec3_t			ambientLight;
	vec3_t			lightDir;
	vec3_t			directedLight;

	trap_R_LightForPoint( verts[0].xyz, ambientLight, directedLight, lightDir );

	for (i = 0; i < numVerts; i++) {
		incoming = DotProduct (normal, lightDir);
		if ( incoming <= 0 ) {
			verts[i].modulate[0] = ambientLight[0];
			verts[i].modulate[1] = ambientLight[1];
			verts[i].modulate[2] = ambientLight[2];
			verts[i].modulate[3] = 255;
			continue;
		} 
		j = ( ambientLight[0] + incoming * directedLight[0] );
		if ( j > 255 ) {
			j = 255;
		}
		verts[i].modulate[0] = j;

		j = ( ambientLight[1] + incoming * directedLight[1] );
		if ( j > 255 ) {
			j = 255;
		}
		verts[i].modulate[1] = j;

		j = ( ambientLight[2] + incoming * directedLight[2] );
		if ( j > 255 ) {
			j = 255;
		}
		verts[i].modulate[2] = j;

		verts[i].modulate[3] = 255;
	}
	return qtrue;
}

/*
===============
CG_Player
===============
*/
void CG_Player( centity_t *cent ) {
	clientInfo_t	*ci;
	refEntity_t		legs;
	refEntity_t		torso;
	refEntity_t		head;
	int				clientNum;
	int				renderfx;
	qboolean		shadow;
	float			shadowPlane;
#ifdef MISSIONPACK
	refEntity_t		skull;
	refEntity_t		powerup;
	int				t;
	float			c;
	float			angle;
	vec3_t			dir, angles;
#endif

	// the client number is stored in clientNum.  It can't be derived
	// from the entity number, because a single client may have
	// multiple corpses on the level using the same clientinfo
	clientNum = cent->currentState.clientNum;
	if ( clientNum < 0 || clientNum >= MAX_CLIENTS ) {
		CG_Error( "Bad clientNum on player entity");
	}
	ci = &cgs.clientinfo[ clientNum ];

	// it is possible to see corpses from disconnected players that may
	// not have valid clientinfo
	if ( !ci->infoValid ) {
		return;
	}

	// get the player model information
	renderfx = 0;
	if ( cent->currentState.number == cg.snap->ps.clientNum) {
		if (!cg.renderingThirdPerson) {
			renderfx = RF_THIRD_PERSON;			// only draw in mirrors
		} else {
			if (cg_cameraMode.integer) {
				return;
			}
		}
	}


	memset( &legs, 0, sizeof(legs) );
	memset( &torso, 0, sizeof(torso) );
	memset( &head, 0, sizeof(head) );

	// get the rotation information
	CG_PlayerAngles( cent, legs.axis, torso.axis, head.axis );
	
	// get the animation state (after rotation, to allow feet shuffle)
	CG_PlayerAnimation( cent, &legs.oldframe, &legs.frame, &legs.backlerp,
		 &torso.oldframe, &torso.frame, &torso.backlerp );

	// add the talk baloon or disconnect icon
	CG_PlayerSprites( cent );

	// add the shadow
	shadow = CG_PlayerShadow( cent, &shadowPlane );

	// add a water splash if partially in and out of water
	CG_PlayerSplash( cent );

	if ( cg_shadows.integer == 3 && shadow ) {
		renderfx |= RF_SHADOW_PLANE;
	}
	renderfx |= RF_LIGHTING_ORIGIN;			// use the same origin for all
#ifdef MISSIONPACK
	if( cgs.gametype == GT_HARVESTER ) {
		CG_PlayerTokens( cent, renderfx );
	}
#endif
	//
	// add the legs
	//
	legs.hModel = ci->legsModel;
	legs.customSkin = ci->legsSkin;

	VectorCopy( cent->lerpOrigin, legs.origin );

	VectorCopy( cent->lerpOrigin, legs.lightingOrigin );
	legs.shadowPlane = shadowPlane;
	legs.renderfx = renderfx;
	VectorCopy (legs.origin, legs.oldorigin);	// don't positionally lerp at all

	CG_AddRefEntityWithPowerups( &legs, &cent->currentState, ci->team );

	// if the model failed, allow the default nullmodel to be displayed
	if (!legs.hModel) {
		return;
	}

	//
	// add the torso
	//
	torso.hModel = ci->torsoModel;
	if (!torso.hModel) {
		return;
	}

	torso.customSkin = ci->torsoSkin;

	VectorCopy( cent->lerpOrigin, torso.lightingOrigin );

	CG_PositionRotatedEntityOnTag( &torso, &legs, ci->legsModel, "tag_torso");

	torso.shadowPlane = shadowPlane;
	torso.renderfx = renderfx;

	CG_AddRefEntityWithPowerups( &torso, &cent->currentState, ci->team );

#ifdef MISSIONPACK
	if ( cent->currentState.eFlags & EF_KAMIKAZE ) {

		memset( &skull, 0, sizeof(skull) );

		VectorCopy( cent->lerpOrigin, skull.lightingOrigin );
		skull.shadowPlane = shadowPlane;
		skull.renderfx = renderfx;

		if ( cent->currentState.eFlags & EF_DEAD ) {
			// one skull bobbing above the dead body
			angle = ((cg.time / 7) & 255) * (M_PI * 2) / 255;
			if (angle > M_PI * 2)
				angle -= (float)M_PI * 2;
			dir[0] = sin(angle) * 20;
			dir[1] = cos(angle) * 20;
			angle = ((cg.time / 4) & 255) * (M_PI * 2) / 255;
			dir[2] = 15 + sin(angle) * 8;
			VectorAdd(torso.origin, dir, skull.origin);
			
			dir[2] = 0;
			VectorCopy(dir, skull.axis[1]);
			VectorNormalize(skull.axis[1]);
			VectorSet(skull.axis[2], 0, 0, 1);
			CrossProduct(skull.axis[1], skull.axis[2], skull.axis[0]);

			skull.hModel = cgs.media.kamikazeHeadModel;
			trap_R_AddRefEntityToScene( &skull );
			skull.hModel = cgs.media.kamikazeHeadTrail;
			trap_R_AddRefEntityToScene( &skull );
		}
		else {
			// three skulls spinning around the player
			angle = ((cg.time / 4) & 255) * (M_PI * 2) / 255;
			dir[0] = cos(angle) * 20;
			dir[1] = sin(angle) * 20;
			dir[2] = cos(angle) * 20;
			VectorAdd(torso.origin, dir, skull.origin);

			angles[0] = sin(angle) * 30;
			angles[1] = (angle * 180 / M_P