cg_weapons.c

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		mark = cgs.media.burnMarkShader;
		radius = 64;
		light = 300;
		isSprite = qtrue;
		break;
	case WP_ROCKET_LAUNCHER:
		mod = cgs.media.dishFlashModel;
		shader = cgs.media.rocketExplosionShader;
		sfx = cgs.media.sfx_rockexp;
		mark = cgs.media.burnMarkShader;
		radius = 64;
		light = 300;
		isSprite = qtrue;
		duration = 1000;
		lightColor[0] = 1;
		lightColor[1] = 0.75;
		lightColor[2] = 0.0;
		if (cg_oldRocket.integer == 0) {
			// explosion sprite animation
			VectorMA( origin, 24, dir, sprOrg );
			VectorScale( dir, 64, sprVel );

			CG_ParticleExplosion( "explode1", sprOrg, sprVel, 1400, 20, 30 );
		}
		break;
	case WP_RAILGUN:
		mod = cgs.media.ringFlashModel;
		shader = cgs.media.railExplosionShader;
		sfx = cgs.media.sfx_plasmaexp;
		mark = cgs.media.energyMarkShader;
		radius = 24;
		break;
	case WP_PLASMAGUN:
		mod = cgs.media.ringFlashModel;
		shader = cgs.media.plasmaExplosionShader;
		sfx = cgs.media.sfx_plasmaexp;
		mark = cgs.media.energyMarkShader;
		radius = 16;
		break;
	case WP_BFG:
		mod = cgs.media.dishFlashModel;
		shader = cgs.media.bfgExplosionShader;
		sfx = cgs.media.sfx_rockexp;
		mark = cgs.media.burnMarkShader;
		radius = 32;
		isSprite = qtrue;
		break;
	case WP_SHOTGUN:
		mod = cgs.media.bulletFlashModel;
		shader = cgs.media.bulletExplosionShader;
		mark = cgs.media.bulletMarkShader;
		sfx = 0;
		radius = 4;
		break;

#ifdef MISSIONPACK
	case WP_CHAINGUN:
		mod = cgs.media.bulletFlashModel;
		if( soundType == IMPACTSOUND_FLESH ) {
			sfx = cgs.media.sfx_chghitflesh;
		} else if( soundType == IMPACTSOUND_METAL ) {
			sfx = cgs.media.sfx_chghitmetal;
		} else {
			sfx = cgs.media.sfx_chghit;
		}
		mark = cgs.media.bulletMarkShader;

		r = rand() & 3;
		if ( r < 2 ) {
			sfx = cgs.media.sfx_ric1;
		} else if ( r == 2 ) {
			sfx = cgs.media.sfx_ric2;
		} else {
			sfx = cgs.media.sfx_ric3;
		}

		radius = 8;
		break;
#endif

	case WP_MACHINEGUN:
		mod = cgs.media.bulletFlashModel;
		shader = cgs.media.bulletExplosionShader;
		mark = cgs.media.bulletMarkShader;

		r = rand() & 3;
		if ( r == 0 ) {
			sfx = cgs.media.sfx_ric1;
		} else if ( r == 1 ) {
			sfx = cgs.media.sfx_ric2;
		} else {
			sfx = cgs.media.sfx_ric3;
		}

		radius = 8;
		break;
	}

	if ( sfx ) {
		trap_S_StartSound( origin, ENTITYNUM_WORLD, CHAN_AUTO, sfx );
	}

	//
	// create the explosion
	//
	if ( mod ) {
		le = CG_MakeExplosion( origin, dir, 
							   mod,	shader,
							   duration, isSprite );
		le->light = light;
		VectorCopy( lightColor, le->lightColor );
		if ( weapon == WP_RAILGUN ) {
			// colorize with client color
			VectorCopy( cgs.clientinfo[clientNum].color1, le->color );
		}
	}

	//
	// impact mark
	//
	alphaFade = (mark == cgs.media.energyMarkShader);	// plasma fades alpha, all others fade color
	if ( weapon == WP_RAILGUN ) {
		float	*color;

		// colorize with client color
		color = cgs.clientinfo[clientNum].color2;
		CG_ImpactMark( mark, origin, dir, random()*360, color[0],color[1], color[2],1, alphaFade, radius, qfalse );
	} else {
		CG_ImpactMark( mark, origin, dir, random()*360, 1,1,1,1, alphaFade, radius, qfalse );
	}
}


/*
=================
CG_MissileHitPlayer
=================
*/
void CG_MissileHitPlayer( int weapon, vec3_t origin, vec3_t dir, int entityNum ) {
	CG_Bleed( origin, entityNum );

	// some weapons will make an explosion with the blood, while
	// others will just make the blood
	switch ( weapon ) {
	case WP_GRENADE_LAUNCHER:
	case WP_ROCKET_LAUNCHER:
#ifdef MISSIONPACK
	case WP_NAILGUN:
	case WP_CHAINGUN:
	case WP_PROX_LAUNCHER:
#endif
		CG_MissileHitWall( weapon, 0, origin, dir, IMPACTSOUND_FLESH );
		break;
	default:
		break;
	}
}



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

SHOTGUN TRACING

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

/*
================
CG_ShotgunPellet
================
*/
static void CG_ShotgunPellet( vec3_t start, vec3_t end, int skipNum ) {
	trace_t		tr;
	int sourceContentType, destContentType;

	CG_Trace( &tr, start, NULL, NULL, end, skipNum, MASK_SHOT );

	sourceContentType = trap_CM_PointContents( start, 0 );
	destContentType = trap_CM_PointContents( tr.endpos, 0 );

	// FIXME: should probably move this cruft into CG_BubbleTrail
	if ( sourceContentType == destContentType ) {
		if ( sourceContentType & CONTENTS_WATER ) {
			CG_BubbleTrail( start, tr.endpos, 32 );
		}
	} else if ( sourceContentType & CONTENTS_WATER ) {
		trace_t trace;

		trap_CM_BoxTrace( &trace, end, start, NULL, NULL, 0, CONTENTS_WATER );
		CG_BubbleTrail( start, trace.endpos, 32 );
	} else if ( destContentType & CONTENTS_WATER ) {
		trace_t trace;

		trap_CM_BoxTrace( &trace, start, end, NULL, NULL, 0, CONTENTS_WATER );
		CG_BubbleTrail( tr.endpos, trace.endpos, 32 );
	}

	if (  tr.surfaceFlags & SURF_NOIMPACT ) {
		return;
	}

	if ( cg_entities[tr.entityNum].currentState.eType == ET_PLAYER ) {
		CG_MissileHitPlayer( WP_SHOTGUN, tr.endpos, tr.plane.normal, tr.entityNum );
	} else {
		if ( tr.surfaceFlags & SURF_NOIMPACT ) {
			// SURF_NOIMPACT will not make a flame puff or a mark
			return;
		}
		if ( tr.surfaceFlags & SURF_METALSTEPS ) {
			CG_MissileHitWall( WP_SHOTGUN, 0, tr.endpos, tr.plane.normal, IMPACTSOUND_METAL );
		} else {
			CG_MissileHitWall( WP_SHOTGUN, 0, tr.endpos, tr.plane.normal, IMPACTSOUND_DEFAULT );
		}
	}
}

/*
================
CG_ShotgunPattern

Perform the same traces the server did to locate the
hit splashes
================
*/
static void CG_ShotgunPattern( vec3_t origin, vec3_t origin2, int seed, int otherEntNum ) {
	int			i;
	float		r, u;
	vec3_t		end;
	vec3_t		forward, right, up;

	// derive the right and up vectors from the forward vector, because
	// the client won't have any other information
	VectorNormalize2( origin2, forward );
	PerpendicularVector( right, forward );
	CrossProduct( forward, right, up );

	// generate the "random" spread pattern
	for ( i = 0 ; i < DEFAULT_SHOTGUN_COUNT ; i++ ) {
		r = Q_crandom( &seed ) * DEFAULT_SHOTGUN_SPREAD * 16;
		u = Q_crandom( &seed ) * DEFAULT_SHOTGUN_SPREAD * 16;
		VectorMA( origin, 8192 * 16, forward, end);
		VectorMA (end, r, right, end);
		VectorMA (end, u, up, end);

		CG_ShotgunPellet( origin, end, otherEntNum );
	}
}

/*
==============
CG_ShotgunFire
==============
*/
void CG_ShotgunFire( entityState_t *es ) {
	vec3_t	v;
	int		contents;

	VectorSubtract( es->origin2, es->pos.trBase, v );
	VectorNormalize( v );
	VectorScale( v, 32, v );
	VectorAdd( es->pos.trBase, v, v );
	if ( cgs.glconfig.hardwareType != GLHW_RAGEPRO ) {
		// ragepro can't alpha fade, so don't even bother with smoke
		vec3_t			up;

		contents = trap_CM_PointContents( es->pos.trBase, 0 );
		if ( !( contents & CONTENTS_WATER ) ) {
			VectorSet( up, 0, 0, 8 );
			CG_SmokePuff( v, up, 32, 1, 1, 1, 0.33f, 900, cg.time, 0, LEF_PUFF_DONT_SCALE, cgs.media.shotgunSmokePuffShader );
		}
	}
	CG_ShotgunPattern( es->pos.trBase, es->origin2, es->eventParm, es->otherEntityNum );
}

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

BULLETS

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


/*
===============
CG_Tracer
===============
*/
void CG_Tracer( vec3_t source, vec3_t dest ) {
	vec3_t		forward, right;
	polyVert_t	verts[4];
	vec3_t		line;
	float		len, begin, end;
	vec3_t		start, finish;
	vec3_t		midpoint;

	// tracer
	VectorSubtract( dest, source, forward );
	len = VectorNormalize( forward );

	// start at least a little ways from the muzzle
	if ( len < 100 ) {
		return;
	}
	begin = 50 + random() * (len - 60);
	end = begin + cg_tracerLength.value;
	if ( end > len ) {
		end = len;
	}
	VectorMA( source, begin, forward, start );
	VectorMA( source, end, forward, finish );

	line[0] = DotProduct( forward, cg.refdef.viewaxis[1] );
	line[1] = DotProduct( forward, cg.refdef.viewaxis[2] );

	VectorScale( cg.refdef.viewaxis[1], line[1], right );
	VectorMA( right, -line[0], cg.refdef.viewaxis[2], right );
	VectorNormalize( right );

	VectorMA( finish, cg_tracerWidth.value, right, verts[0].xyz );
	verts[0].st[0] = 0;
	verts[0].st[1] = 1;
	verts[0].modulate[0] = 255;
	verts[0].modulate[1] = 255;
	verts[0].modulate[2] = 255;
	verts[0].modulate[3] = 255;

	VectorMA( finish, -cg_tracerWidth.value, right, verts[1].xyz );
	verts[1].st[0] = 1;
	verts[1].st[1] = 0;
	verts[1].modulate[0] = 255;
	verts[1].modulate[1] = 255;
	verts[1].modulate[2] = 255;
	verts[1].modulate[3] = 255;

	VectorMA( start, -cg_tracerWidth.value, right, verts[2].xyz );
	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;

	VectorMA( start, cg_tracerWidth.value, right, verts[3].xyz );
	verts[3].st[0] = 0;
	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.tracerShader, 4, verts );

	midpoint[0] = ( start[0] + finish[0] ) * 0.5;
	midpoint[1] = ( start[1] + finish[1] ) * 0.5;
	midpoint[2] = ( start[2] + finish[2] ) * 0.5;

	// add the tracer sound
	trap_S_StartSound( midpoint, ENTITYNUM_WORLD, CHAN_AUTO, cgs.media.tracerSound );

}


/*
======================
CG_CalcMuzzlePoint
======================
*/
static qboolean	CG_CalcMuzzlePoint( int entityNum, vec3_t muzzle ) {
	vec3_t		forward;
	centity_t	*cent;
	int			anim;

	if ( entityNum == cg.snap->ps.clientNum ) {
		VectorCopy( cg.snap->ps.origin, muzzle );
		muzzle[2] += cg.snap->ps.viewheight;
		AngleVectors( cg.snap->ps.viewangles, forward, NULL, NULL );
		VectorMA( muzzle, 14, forward, muzzle );
		return qtrue;
	}

	cent = &cg_entities[entityNum];
	if ( !cent->currentValid ) {
		return qfalse;
	}

	VectorCopy( cent->currentState.pos.trBase, muzzle );

	AngleVectors( cent->currentState.apos.trBase, forward, NULL, NULL );
	anim = cent->currentState.legsAnim & ~ANIM_TOGGLEBIT;
	if ( anim == LEGS_WALKCR || anim == LEGS_IDLECR ) {
		muzzle[2] += CROUCH_VIEWHEIGHT;
	} else {
		muzzle[2] += DEFAULT_VIEWHEIGHT;
	}

	VectorMA( muzzle, 14, forward, muzzle );

	return qtrue;

}

/*
======================
CG_Bullet

Renders bullet effects.
======================
*/
void CG_Bullet( vec3_t end, int sourceEntityNum, vec3_t normal, qboolean flesh, int fleshEntityNum ) {
	trace_t trace;
	int sourceContentType, destContentType;
	vec3_t		start;

	// if the shooter is currently valid, calc a source point and possibly
	// do trail effects
	if ( sourceEntityNum >= 0 && cg_tracerChance.value > 0 ) {
		if ( CG_CalcMuzzlePoint( sourceEntityNum, start ) ) {
			sourceContentType = trap_CM_PointContents( start, 0 );
			destContentType = trap_CM_PointContents( end, 0 );

			// do a complete bubble trail if necessary
			if ( ( sourceContentType == destContentType ) && ( sourceContentType & CONTENTS_WATER ) ) {
				CG_BubbleTrail( start, end, 32 );
			}
			// bubble trail from water into air
			else if ( ( sourceContentType & CONTENTS_WATER ) ) {
				trap_CM_BoxTrace( &trace, end, start, NULL, NULL, 0, CONTENTS_WATER );
				CG_BubbleTrail( start, trace.endpos, 32 );
			}
			// bubble trail from air into water
			else if ( ( destContentType & CONTENTS_WATER ) ) {
				trap_CM_BoxTrace( &trace, start, end, NULL, NULL, 0, CONTENTS_WATER );
				CG_BubbleTrail( trace.endpos, end, 32 );
			}

			// draw a tracer
			if ( random() < cg_tracerChance.value ) {
				CG_Tracer( start, end );
			}
		}
	}

	// impact splash and mark
	if ( flesh ) {
		CG_Bleed( end, fleshEntityNum );
	} else {
		CG_MissileHitWall( WP_MACHINEGUN, 0, end, normal, IMPACTSOUND_DEFAULT );
	}

}