// Copyright (C) 1999-2000 Id Software, Inc.
//
// cg_weapons.c -- events and effects dealing with weapons

/*
 *  Portions Copyright (C) 2000-2001 Tim Angus
 *
 *  This program is free software; you can redistribute it and/or modify it
 *  under the terms of the OSML - Open Source Modification License v1.0 as
 *  described in the file COPYING which is distributed with this source
 *  code.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 */

#include "cg_local.h"

/*
==========================
CG_MachineGunEjectBrass
==========================
*/
static void CG_MachineGunEjectBrass( centity_t *cent )
{
  localEntity_t *le;
  refEntity_t   *re;
  vec3_t        velocity, xvelocity;
  vec3_t        offset, xoffset;
  float         waterScale = 1.0f;
  vec3_t        v[ 3 ];

  if( cg_brassTime.integer <= 0 )
    return;

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

  velocity[ 0 ] = 0;
  velocity[ 1 ] = -50 + 40 * crandom( );
  velocity[ 2 ] = 100 + 50 * crandom( );

  le->leType = LE_FRAGMENT;
  le->startTime = cg.time;
  le->endTime = le->startTime + cg_brassTime.integer + ( cg_brassTime.integer / 4 ) * random( );

  le->pos.trType = TR_GRAVITY;
  le->pos.trTime = cg.time - ( rand( ) & 15 );

  AnglesToAxis( cent->lerpAngles, v );

  offset[ 0 ] = 8;
  offset[ 1 ] = -4;
  offset[ 2 ] = 24;

  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( cent->lerpOrigin, 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->hModel = cgs.media.machinegunBrassModel;

  le->bounceFactor = 0.4 * waterScale;

  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 ] = 2;
  le->angles.trDelta[ 1 ] = 1;
  le->angles.trDelta[ 2 ] = 0;

  le->leFlags = LEF_TUMBLE;
  le->leBounceSoundType = LEBS_BRASS;
  le->leMarkType = LEMT_NONE;
}

/*
==========================
CG_TeslaTrail
==========================
*/
void CG_TeslaTrail( vec3_t start, vec3_t end, int srcENum, int destENum )
{
  localEntity_t *le;
  refEntity_t   *re;
  
  //add a bunch of bolt segments
  le = CG_AllocLocalEntity( );
  re = &le->refEntity;

  le->leType = LE_LIGHTNING_BOLT;
  le->startTime = cg.time;
  le->endTime = cg.time + cg_teslaTrailTime.value;
  le->lifeRate = 1.0 / ( le->endTime - le->startTime );
  re->customShader = cgs.media.lightningShader;

  le->srcENum = srcENum;
  le->destENum = destENum;
  le->vOffset = 28;
  le->maxRange = BG_FindRangeForBuildable( BA_H_TESLAGEN );

  VectorCopy( start, re->origin );
  VectorCopy( end, re->oldorigin );
}

/*
==========================
CG_AlienZap
==========================
*/
void CG_AlienZap( vec3_t start, vec3_t end, int srcENum, int destENum )
{
  localEntity_t *le;
  refEntity_t   *re;
  
  //add a bunch of bolt segments
  le = CG_AllocLocalEntity();
  re = &le->refEntity;

  le->leType = LE_LIGHTNING_BOLT;
  le->startTime = cg.time;
  le->endTime = cg.time + cg_alienZapTime.value;
  le->lifeRate = 1.0 / ( le->endTime - le->startTime );
  re->customShader = cgs.media.lightningShader;

  le->srcENum = srcENum;
  le->destENum = destENum;
  le->vOffset = -4;

  le->maxRange = CHIMERA_AREAZAP_RANGE;

  VectorCopy( start, re->origin );
  VectorCopy( end, re->oldorigin );
}

/*
=================
CG_RegisterUpgrade

The server says this item is used on this level
=================
*/
void CG_RegisterUpgrade( int upgradeNum )
{
  upgradeInfo_t   *upgradeInfo;
  char            path[MAX_QPATH];
  int             i;
  char            *icon;

  upgradeInfo = &cg_upgrades[ upgradeNum ];

  if( upgradeNum == 0 )
    return;

  if( upgradeInfo->registered )
    return;

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

  if( !BG_FindNameForUpgrade( upgradeNum ) )
    CG_Error( "Couldn't find upgrade %i", upgradeNum );
  
  upgradeInfo->humanName = BG_FindHumanNameForUpgrade( upgradeNum );
  
  if( icon = BG_FindIconForUpgrade( upgradeNum ) )
    upgradeInfo->upgradeIcon = trap_R_RegisterShader( icon );
}

/*
===============
CG_InitUpgrades

Precaches upgrades
===============
*/
void CG_InitUpgrades( void )
{
  int   i;

  memset( cg_upgrades, 0, sizeof( cg_upgrades ) );

  for( i = UP_NONE + 1; i < UP_NUM_UPGRADES; i++ )
    CG_RegisterUpgrade( i );
}

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

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

  weaponInfo = &cg_weapons[ weaponNum ];

  if( weaponNum == 0 )
    return;

  if( weaponInfo->registered )
    return;

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

  if( !BG_FindNameForWeapon( weaponNum ) )
    CG_Error( "Couldn't find weapon %i", weaponNum );
  
  weaponInfo->humanName = BG_FindHumanNameForWeapon( weaponNum );

  // load cmodel before model so filecache works
  if( model = BG_FindModelsForWeapon( weaponNum, 0 ) )
    weaponInfo->weaponModel = trap_R_RegisterModel( model );

  // 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 ] );

  if( icon = BG_FindIconForWeapon( weaponNum ) )
  {
    weaponInfo->weaponIcon = trap_R_RegisterShader( icon );
    weaponInfo->ammoIcon = trap_R_RegisterShader( icon );
  }
  
  strcpy( path, model );
  COM_StripExtension( path, path );
  strcat( path, "_flash.md3" );
  weaponInfo->flashModel = trap_R_RegisterModel( path );

  strcpy( path, model );
  COM_StripExtension( path, path );
  strcat( path, "_barrel.md3" );
  weaponInfo->barrelModel = trap_R_RegisterModel( path );

  strcpy( path, model );
  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_TESLAGEN:
    case WP_AREA_ZAP:
    case WP_DIRECT_ZAP:
      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( "models/ammo/tesla/tesla_bolt");
      cgs.media.lightningExplosionModel = trap_R_RegisterModel( "models/weaphits/crackle.md3" );
      cgs.media.sfx_lghit = trap_S_RegisterSound( "sound/weapons/lightning/lg_fire.wav", qfalse );
      break;

    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_MASS_DRIVER:
      MAKERGB( weaponInfo->flashDlightColor, 0, 0, 1 );
      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 );
      break;

    case WP_CHAINGUN:
      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_LOCKBLOB_LAUNCHER:
  /*    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->missileModel = trap_R_RegisterModel( "models/ammo/grenade1.md3" );
      weaponInfo->flashSound[ 0 ] = trap_S_RegisterSound( "sound/weapons/rocket/rocklf1a.wav", qfalse );
      /*cgs.media.rocketExplosionShader = trap_R_RegisterShader( "rocketExplosion" );*/
      break;

    case WP_FLAMER:
      weaponInfo->missileSound = trap_S_RegisterSound( "sound/weapons/flamer/fireloop.wav", qfalse );
      MAKERGB( weaponInfo->flashDlightColor, 0.25, 0.1, 0 );
      //weaponInfo->flashSound[ 0 ] = trap_S_RegisterSound( "sound/weapons/railgun/railgf1a.wav", qfalse );
      /*cgs.media.flameExplShader = trap_R_RegisterShader( "rocketExplosion" );*/
      break;

    case WP_PULSE_RIFLE:
      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" );
      break;

    case WP_LAS_GUN:
      MAKERGB( weaponInfo->flashDlightColor, 1, 1, 0 );
      weaponInfo->flashSound[ 0 ] = trap_S_RegisterSound( "sound/weapons/plasma/hyprbf1a.wav", qfalse );
      cgs.media.bulletExplosionShader = trap_R_RegisterShader( "bulletExplosion" );
      break;
      
    case WP_LUCIFER_CANON:
      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;

    case WP_VENOM:
      MAKERGB( weaponInfo->flashDlightColor, 0, 0, 0 );
      weaponInfo->flashSound[ 0 ] = trap_S_RegisterSound( "sound/weapons/melee/fstatck.wav", qfalse );
      break;

    case WP_PAIN_SAW:
      MAKERGB( weaponInfo->flashDlightColor, 0, 0, 0 );
      weaponInfo->flashSound[ 0 ] = trap_S_RegisterSound( "sound/weapons/melee/fstatck.wav", qfalse );
      break;

    case WP_GRAB_CLAW:
    case WP_GRAB_CLAW_UPG:
      MAKERGB( weaponInfo->flashDlightColor, 0, 0, 0 );
      weaponInfo->flashSound[ 0 ] = trap_S_RegisterSound( "sound/weapons/melee/fstatck.wav", qfalse );
      break;

    case WP_POUNCE:
    case WP_POUNCE_UPG:
      MAKERGB( weaponInfo->flashDlightColor, 0, 0, 0 );
      weaponInfo->flashSound[ 0 ] = trap_S_RegisterSound( "sound/weapons/melee/fstatck.wav", qfalse );
      weaponInfo->missileModel = trap_R_RegisterModel( "models/ammo/grenade1.md3" );
      break;

    case WP_GROUND_POUND:
      MAKERGB( weaponInfo->flashDlightColor, 0, 0, 0 );
      weaponInfo->flashSound[ 0 ] = trap_S_RegisterSound( "sound/weapons/melee/fstatck.wav", qfalse );
      break;

    case WP_ABUILD:
    case WP_ABUILD2:
    case WP_HBUILD:
    case WP_HBUILD2:
      //nowt
      break;

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

/*
===============
CG_InitWeapons

Precaches weapons
===============
*/
void CG_InitWeapons( void )
{
  int   i;

  memset( cg_weapons, 0, sizeof( cg_weapons ) );

  for( i = WP_NONE + 1; i < WP_NUM_WEAPONS; i++ )
    CG_RegisterWeapon( i );
}


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

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_ATTACK ].firstFrame;

  return 0;
}


/*
==============
CG_CalculateWeaponPosition
==============
*/
static void CG_CalculateWeaponPosition( vec3_t origin, vec3_t angles )
{
  float scale;
  int   delta;
  float fracsin;
  float bob;

  VectorCopy( cg.refdef.vieworg, origin );
  VectorCopy( cg.refdefViewAngles, angles );

  // on odd legs, invert some angles
  if( cg.bobcycle & 1 )
    scale = -cg.xyspeed;
  else
    scale = cg.xyspeed;

  // gun angles from bobbing
  //TA: bob amount is class dependant
  bob = BG_FindBobForClass( cg.predictedPlayerState.stats[ STAT_PCLASS ] );
  
  if( bob != 0 )
  {
    angles[ ROLL ] += scale * cg.bobfracsin * 0.005;
    angles[ YAW ] += scale * cg.bobfracsin * 0.01;
    angles[ PITCH ] += cg.xyspeed * cg.bobfracsin * 0.005;
  }

  // drop the weapon when landing
  if( !BG_ClassHasAbility( cg.predictedPlayerState.stats[ STAT_PCLASS ], SCA_NOWEAPONDRIFT ) )
  {
    delta = cg.time - cg.landTime;
    if( delta < LAND_DEFLECT_TIME )
      origin[ 2 ] += cg.landChange*0.25 * delta / LAND_DEFLECT_TIME;
    else if( delta < LAND_DEFLECT_TIME + LAND_RETURN_TIME )
      origin[ 2 ] += cg.landChange*0.25 *
        ( LAND_DEFLECT_TIME + LAND_RETURN_TIME - delta ) / LAND_RETURN_TIME;

    // idle drift
    scale = cg.xyspeed + 40;
    fracsin = sin( cg.time * 0.001 );
    angles[ ROLL ] += scale * fracsin * 0.01;
    angles[ YAW ] += scale * fracsin * 0.01;
    angles[ PITCH ] += scale * fracsin * 0.01;
  }
}


/*
===============
CG_LightningBolt

Origin will be the exact tag point, which is slightly
different than the muzzle point used for determining hits.
The cent should be the non-predicted cent if it is from the player,
so the endpoint will reflect the simulated strike (lagging the predicted
angle)
===============
*/
static void CG_LightningBolt( centity_t *cent, vec3_t origin )
{
  trace_t       trace;
  refEntity_t   beam;
  vec3_t        forward;
  vec3_t        muzzlePoint, endPoint;

  if( cent->currentState.weapon != WP_TESLAGEN )
    return;

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

  // CPMA  "true" lightning
  if( ( cent->currentState.number == cg.predictedPlayerState.clientNum ) &&
      ( cg_trueLightning.value != 0 ) )
  {
    vec3_t angle;
    int i;

    for( i = 0; i < 3; i++ )
    {
      float a = cent->lerpAngles[ i ] - cg.refdefViewAngles[ i ];
      if( a > 180 )
        a -= 360;

      if( a < -180 )
        a += 360;

      angle[ i ] = cg.refdefViewAngles[ i ] + a * ( 1.0 - cg_trueLightning.value );
      
      if( angle[ i ] < 0 )
        angle[ i ] += 360;

      if( angle[ i ] > 360 )
        angle[ i ] -= 360;
    }

    AngleVectors( angle, forward, NULL, NULL );
    VectorCopy( cent->lerpOrigin, muzzlePoint );
//    VectorCopy(cg.refdef.vieworg, muzzlePoint );
  }
  else
  {
    // !CPMA
    AngleVectors( cent->lerpAngles, forward, NULL, NULL );
    VectorCopy( cent->lerpOrigin, muzzlePoint );
  }

  // FIXME: crouch
  muzzlePoint[ 2 ] += DEFAULT_VIEWHEIGHT;

  VectorMA( muzzlePoint, 14, forward, muzzlePoint );

  // project forward by the lightning range
  VectorMA( muzzlePoint, TESLAGEN_RANGE, forward, endPoint );

  // see if it hit a wall
  CG_Trace( &trace, muzzlePoint, vec3_origin, vec3_origin, endPoint,
    cent->currentState.number, MASK_SHOT );

  // this is the endpoint
  VectorCopy( trace.endpos, beam.oldorigin );

  // use the provided origin, even though it may be slightly
  // different than the muzzle origin
  VectorCopy( origin, beam.origin );

  beam.reType = RT_LIGHTNING;
  beam.customShader = cgs.media.lightningShader;
  trap_R_AddRefEntityToScene( &beam );

  // add the impact flare if it hit something
  if( trace.fraction < 1.0 )
  {
    vec3_t  angles;
    vec3_t  dir;

    VectorSubtract( beam.oldorigin, beam.origin, dir );
    VectorNormalize( dir );

    memset( &beam, 0, sizeof( beam ) );
    beam.hModel = cgs.media.lightningExplosionModel;

    VectorMA( trace.endpos, -16, dir, beam.origin );

    // make a random orientation
    angles[ 0 ] = rand( ) % 360;
    angles[ 1 ] = rand( ) % 360;
    angles[ 2 ] = rand( ) % 360;
    AnglesToAxis( angles, beam.axis );
    trap_R_AddRefEntityToScene( &beam );
  }
}


#define POISONCLOUD_LIFETIME  800
#define POISONCLOUD_SPEED     80.0f
#define POISONCLOUD_GAP       40
#define POISONCLOUD_LAG       0.75f
#define POISONCLOUD_SPREAD    160.0f

/*
===============
CG_PoisonCloud
===============
*/
static void CG_PoisonCloud( centity_t *cent, int firstPoisonTime )
{
  vec3_t  forward, right, up;
  vec3_t  muzzlePoint;
  vec3_t  velocity;
  vec3_t  pVelocity;
  vec3_t  accel = { 0.0f, 0.0f, 2.0f };
  vec3_t  surfNormal;
  entityState_t *es = &cent->currentState;

  if( cent->currentState.weapon != WP_GRAB_CLAW_UPG )
    return;

  //finite lifetime
  if( firstPoisonTime + POISONCLOUD_LIFETIME < cg.time )
    return;
  
  //not time for the next ball yet
  if( cg.time < cent->poisonTime )
    return;
  
  if( cent->currentState.clientNum == cg.predictedPlayerState.clientNum && !cg.renderingThirdPerson )
  {
    AngleVectors( cg.refdefViewAngles, forward, right, up );
    VectorCopy( cg.refdef.vieworg, muzzlePoint );
    VectorScale( cg.predictedPlayerState.velocity, POISONCLOUD_LAG, pVelocity );
  }
  else
  {
    AngleVectors( cent->lerpAngles, forward, right, up );
    VectorCopy( cent->lerpOrigin, muzzlePoint );

    //FIXME: this is gonna look weird when crouching
    muzzlePoint[ 2 ] += DEFAULT_VIEWHEIGHT;
    VectorScale( cent->currentState.pos.trDelta, POISONCLOUD_LAG, pVelocity );
  }
  
  VectorMA( pVelocity, POISONCLOUD_SPEED, forward, velocity );

  VectorMA( muzzlePoint, 24.0f, forward, muzzlePoint );
  VectorMA( muzzlePoint, -6.0f, up, muzzlePoint );

  if( es->eFlags & EF_WALLCLIMBCEILING )
    VectorSet( surfNormal, 0.0f, 0.0f, -1.0f );
  else
    VectorCopy( es->angles2, surfNormal );
  
  VectorMA( velocity, -33.0f, surfNormal, velocity );

  CG_LaunchSprite( muzzlePoint, velocity, accel, POISONCLOUD_SPREAD,
                   0.5f, 10.0f, 40.0f, 127.0f, 0.0f,
                   rand( ) % 360, cg.time, cg.time, POISONCLOUD_LIFETIME,
                   cgs.media.poisonCloudShader, qfalse, qfalse );

  //set next ball time
  cent->poisonTime = cg.time + POISONCLOUD_GAP;
}

#define FIREBALL_GAP              15    //basically as fast as possible yet regular

/*
===============
CG_FlameTrail
===============
*/
static void CG_FlameTrail( centity_t *cent )
{
  vec3_t  forward, right, up;
  vec3_t  muzzlePoint;
  vec3_t  velocity;
  vec3_t  pVelocity;

  if( cent->currentState.weapon != WP_FLAMER )
    return;

  //not time for the next ball yet
  if( cg.time < cent->flamerTime )
    return;
  
  if( cent->currentState.clientNum == cg.predictedPlayerState.clientNum && !cg.renderingThirdPerson )
  {
    AngleVectors( cg.refdefViewAngles, forward, right, up );
    VectorCopy( cg.refdef.vieworg, muzzlePoint );
    VectorScale( cg.predictedPlayerState.velocity, FLAMER_LAG, pVelocity );
  }
  else
  {
    AngleVectors( cent->lerpAngles, forward, right, up );
    VectorCopy( cent->lerpOrigin, muzzlePoint );

    //FIXME: this is gonna look weird when crouching
    muzzlePoint[ 2 ] += DEFAULT_VIEWHEIGHT;
    VectorScale( cent->currentState.pos.trDelta, FLAMER_LAG, pVelocity );
  }
  
  VectorMA( pVelocity, FLAMER_SPEED, forward, velocity );

  //FIXME: tweak these numbers when (if?) the flamer model is done
  VectorMA( muzzlePoint, 24.0f, forward, muzzlePoint );
  VectorMA( muzzlePoint, 6.0f, right, muzzlePoint );
  VectorMA( muzzlePoint, -6.0f, up, muzzlePoint );
  
  CG_LaunchSprite( muzzlePoint, velocity, vec3_origin, 0.0f,
                   0.1f, 4.0f, 40.0f, 255.0f, 255.0f,
                   rand( ) % 360, cg.time, cg.time, FLAMER_LIFETIME,
                   cgs.media.flameShader[ 0 ], qfalse, qfalse );

  //set next ball time
  cent->flamerTime = cg.time + FIREBALL_GAP;
}


/*
======================
CG_MachinegunSpinAngle
======================
*/
#define   SPIN_SPEED  0.9
#define   COAST_TIME  1000
static float CG_MachinegunSpinAngle( centity_t *cent )
{
  int   delta;
  float angle;
  float speed;

  delta = cg.time - cent->pe.barrelTime;
  if( cent->pe.barrelSpinning )
    angle = cent->pe.barrelAngle + delta * SPIN_SPEED;
  else
  {
    if( delta > COAST_TIME )
      delta = COAST_TIME;

    speed = 0.5 * ( SPIN_SPEED + (float)( COAST_TIME - delta ) / COAST_TIME );
    angle = cent->pe.barrelAngle + delta * speed;
  }

  if( cent->pe.barrelSpinning == !( cent->currentState.eFlags & EF_FIRING ) )
  {
    cent->pe.barrelTime = cg.time;
    cent->pe.barrelAngle = AngleMod( angle );
    cent->pe.barrelSpinning = !!( cent->currentState.eFlags & EF_FIRING );
                          //TA: um?
  }

  return angle;
}


/*
========================
CG_AddWeaponWithPowerups
========================
*/
static void CG_AddWeaponWithPowerups( refEntity_t *gun, int powerups )
{
  trap_R_AddRefEntityToScene( gun );
}


/*
=============
CG_AddPlayerWeapon

Used for both the view weapon (ps is valid) and the world modelother character models (ps is NULL)
The main player will have this called for BOTH cases, so effects like light and
sound should only be done on the world model case.
=============
*/
void CG_AddPlayerWeapon( refEntity_t *parent, playerState_t *ps, centity_t *cent )
{
  refEntity_t   gun;
  refEntity_t   barrel;
  refEntity_t   flash;
  vec3_t        angles;
  weapon_t      weaponNum;
  weaponInfo_t  *weapon;
  centity_t     *nonPredictedCent;

  weaponNum = cent->currentState.weapon;

  CG_RegisterWeapon( weaponNum );
  weapon = &cg_weapons[ weaponNum ];

  // add the weapon
  memset( &gun, 0, sizeof( gun ) );
  VectorCopy( parent->lightingOrigin, gun.lightingOrigin );
  gun.shadowPlane = parent->shadowPlane;
  gun.renderfx = parent->renderfx;

  // set custom shading for railgun refire rate
  if( ps )
  {
    gun.shaderRGBA[ 0 ] = 255;
    gun.shaderRGBA[ 1 ] = 255;
    gun.shaderRGBA[ 2 ] = 255;
    gun.shaderRGBA[ 3 ] = 255;

    //set weapon[1/2]Time when respective buttons change state
    if( cg.weapon1Firing != ( cg.predictedPlayerState.eFlags & EF_FIRING ) )
    {
      cg.weapon1Time = cg.time;
      cg.weapon1Firing = ( cg.predictedPlayerState.eFlags & EF_FIRING );
    }
    
    if( cg.weapon2Firing != ( cg.predictedPlayerState.eFlags & EF_FIRING2 ) )
    {
      cg.weapon2Time = cg.time;
      cg.weapon2Firing = ( cg.predictedPlayerState.eFlags & EF_FIRING2 );
    }
    
    if( cg.weapon3Firing != ( cg.predictedPlayerState.eFlags & EF_FIRING3 ) )
    {
      cg.weapon3Time = cg.time;
      cg.weapon3Firing = ( cg.predictedPlayerState.eFlags & EF_FIRING3 );
    }
  }

  gun.hModel = weapon->weaponModel;
  if( !gun.hModel )
    return;

  if( !ps )
  {
    // add weapon ready sound
    cent->pe.lightningFiring = qfalse;
    if( ( cent->currentState.eFlags & EF_FIRING ) && weapon->firingSound )
    {
      // lightning gun and guantlet make a different sound when fire is held down
      trap_S_AddLoopingSound( cent->currentState.number, cent->lerpOrigin, vec3_origin, weapon->firingSound );
      cent->pe.lightningFiring = qtrue;
    }
    else if( weapon->readySound )
      trap_S_AddLoopingSound( cent->currentState.number, cent->lerpOrigin, vec3_origin, weapon->readySound );
  }

  CG_PositionEntityOnTag( &gun, parent, parent->hModel, "tag_weapon" );

  CG_AddWeaponWithPowerups( &gun, cent->currentState.powerups );

  // add the spinning barrel
  if( weapon->barrelModel )
  {
    memset( &barrel, 0, sizeof( barrel ) );
    VectorCopy( parent->lightingOrigin, barrel.lightingOrigin );
    barrel.shadowPlane = parent->shadowPlane;
    barrel.renderfx = parent->renderfx;

    barrel.hModel = weapon->barrelModel;
    angles[ YAW ] = 0;
    angles[ PITCH ] = 0;
    angles[ ROLL ] = CG_MachinegunSpinAngle( cent );
    AnglesToAxis( angles, barrel.axis );

    CG_PositionRotatedEntityOnTag( &barrel, &gun, weapon->weaponModel, "tag_barrel" );

    CG_AddWeaponWithPowerups( &barrel, cent->currentState.powerups );
  }

  // make sure we aren't looking at cg.predictedPlayerEntity for LG
  nonPredictedCent = &cg_entities[ cent->currentState.clientNum ];

  // if the index of the nonPredictedCent is not the same as the clientNum
  // then this is a fake player (like on teh single player podiums), so
  // go ahead and use the cent
  if( ( nonPredictedCent - cg_entities ) != cent->currentState.clientNum )
    nonPredictedCent = cent;

  CG_PoisonCloud( nonPredictedCent, cent->firstPoisonTime );

  // add the flash
  if( ( weaponNum == WP_TESLAGEN || weaponNum == WP_FLAMER ) &&
      ( nonPredictedCent->currentState.eFlags & EF_FIRING ) )
  {
    // continuous flash
  }
  else
  {
    // impulse flash
    if( cg.time - cent->muzzleFlashTime > MUZZLE_FLASH_TIME && !cent->pe.railgunFlash )
      return;
  }

  memset( &flash, 0, sizeof( flash ) );
  VectorCopy( parent->lightingOrigin, flash.lightingOrigin );
  flash.shadowPlane = parent->shadowPlane;
  flash.renderfx = parent->renderfx;

  flash.hModel = weapon->flashModel;
  if( !flash.hModel )
    return;

  angles[ YAW ] = 0;
  angles[ PITCH ] = 0;
  angles[ ROLL ] = crandom( ) * 10;
  AnglesToAxis( angles, flash.axis );

  CG_PositionRotatedEntityOnTag( &flash, &gun, weapon->weaponModel, "tag_flash" );
  trap_R_AddRefEntityToScene( &flash );

  if( ps || cg.renderingThirdPerson ||
      cent->currentState.number != cg.predictedPlayerState.clientNum )
  {
    // add lightning bolt
    CG_LightningBolt( nonPredictedCent, flash.origin );
    
    CG_FlameTrail( nonPredictedCent );

    // make a dlight for the flash
    if( weapon->flashDlightColor[ 0 ] || weapon->flashDlightColor[ 1 ] || weapon->flashDlightColor[ 2 ] )
    {
      trap_R_AddLightToScene( flash.origin, 300 + ( rand( ) & 31 ), weapon->flashDlightColor[ 0 ],
        weapon->flashDlightColor[ 1 ], weapon->flashDlightColor[ 2 ] );
    }
  }
}

/*
==============
CG_AddViewWeapon

Add the weapon, and flash for the player's view
==============
*/
void CG_AddViewWeapon( playerState_t *ps )
{
  refEntity_t   hand;
  centity_t     *cent;
  clientInfo_t  *ci;
  float         fovOffset;
  vec3_t        angles;
  weaponInfo_t  *weapon;

  if( ( ps->persistant[PERS_TEAM] == TEAM_SPECTATOR ) ||
      ( ps->stats[ STAT_STATE ] & SS_INFESTING ) ||
      ( ps->stats[ STAT_STATE ] & SS_HOVELING ) )
    return;

  //TA: no weapon carried - can't draw it
  if( ps->weapon == WP_NONE )
    return;
      
  if( ps->pm_type == PM_INTERMISSION )
    return;

  //TA: draw a prospective buildable infront of the player
  if( ( ps->stats[ STAT_BUILDABLE ] & ~SB_VALID_TOGGLEBIT ) > BA_NONE )
    CG_GhostBuildable( ps->stats[ STAT_BUILDABLE ] & ~SB_VALID_TOGGLEBIT );

  // no gun if in third person view
  if( cg.renderingThirdPerson )
    return;

  // allow the gun to be completely removed
  if( !cg_drawGun.integer )
  {
    vec3_t origin;

    if( cg.predictedPlayerState.eFlags & EF_FIRING )
    {
      // special hack for lightning gun...
      // TA: and flamer
      VectorCopy( cg.refdef.vieworg, origin );
      VectorMA( origin, -8, cg.refdef.viewaxis[ 2 ], origin );
      CG_LightningBolt( &cg_entities[ ps->clientNum ], origin );
      CG_FlameTrail( &cg_entities[ ps->clientNum ] );
    }
    
    return;
  }

  // don't draw if testing a gun model
  if( cg.testGun )
    return;

  // drop gun lower at higher fov
  //if ( cg_fov.integer > 90 ) {
  //TA: the client side variable isn't used ( shouldn't iD have done this anyway? )
  if( cg.refdef.fov_y > 90 )
    fovOffset = -0.4 * ( cg.refdef.fov_y - 90 );
  else
    fovOffset = 0;

  cent = &cg.predictedPlayerEntity; // &cg_entities[cg.snap->ps.clientNum];
  CG_RegisterWeapon( ps->weapon );
  weapon = &cg_weapons[ ps->weapon ];

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

  // set up gun position
  CG_CalculateWeaponPosition( hand.origin, angles );

  VectorMA( hand.origin, cg_gun_x.value, cg.refdef.viewaxis[ 0 ], hand.origin );
  VectorMA( hand.origin, cg_gun_y.value, cg.refdef.viewaxis[ 1 ], hand.origin );
  VectorMA( hand.origin, ( cg_gun_z.value + fovOffset ), cg.refdef.viewaxis[ 2 ], hand.origin );

  if( ps->weapon == WP_LUCIFER_CANON && ps->stats[ STAT_MISC ] > 0 )
  {
    float fraction = (float)ps->stats[ STAT_MISC ] / (float)LCANON_TOTAL_CHARGE;

    VectorMA( hand.origin, random( ) * fraction, cg.refdef.viewaxis[ 0 ], hand.origin );
    VectorMA( hand.origin, random( ) * fraction, cg.refdef.viewaxis[ 1 ], hand.origin );
  }
  
  if( cg.predictedPlayerState.stats[ STAT_STATE ] & SS_KNOCKEDOVER )
  {
    vec3_t  weaponRumble;

    VectorCopy( cg.rumbleVector, weaponRumble );
    VectorInverse( weaponRumble );
    VectorScale( weaponRumble, 0.1f, weaponRumble );
      
    VectorAdd( hand.origin, weaponRumble, hand.origin );
  }
  
  AnglesToAxis( angles, hand.axis );

  // map torso animations to weapon animations
  if( cg_gun_frame.integer )
  {
    // development tool
    hand.frame = hand.oldframe = cg_gun_frame.integer;
    hand.backlerp = 0;
  }
  else
  {
    // get clientinfo for animation map
    ci = &cgs.clientinfo[ cent->currentState.clientNum ];
    hand.frame = CG_MapTorsoToWeaponFrame( ci, cent->pe.torso.frame );
    hand.oldframe = CG_MapTorsoToWeaponFrame( ci, cent->pe.torso.oldFrame );
    hand.backlerp = cent->pe.torso.backlerp;
  }

  hand.hModel = weapon->handsModel;
  hand.renderfx = RF_DEPTHHACK | RF_FIRST_PERSON | RF_MINLIGHT;

  // add everything onto the hand
  CG_AddPlayerWeapon( &hand, ps, &cg.predictedPlayerEntity );
}

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

WEAPON SELECTION

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

#define ICON_BORDER 4

/*
===================
CG_DrawWeaponSelect
===================
*/
void CG_DrawWeaponSelect( rectDef_t *rect )
{
  int i;
  int x = rect->x;
  int y = rect->y;
  int width = rect->w;
  int height = rect->h;
  int iconsize;
  int items[ 64 ];
  int numItems = 0, selectedItem;
  int length;
  int selectWindow;
  qboolean vertical;

  // don't display if dead
  if( cg.predictedPlayerState.stats[STAT_HEALTH] <= 0 )
    return;

  // showing weapon select clears pickup item display, but not the blend blob
  cg.itemPickupTime = 0;

  if( height > width )
  {
    vertical = qtrue;
    iconsize = width;
    length = height / width;
  }
  else if( height <= width )
  {
    vertical = qfalse;
    iconsize = height;
    length = width / height;
  }
  
  selectWindow = length / 2;
  
  for( i = WP_NONE + 1; i < WP_NUM_WEAPONS; i++ )
  {
    if( !BG_gotWeapon( i, cg.snap->ps.stats ) )
      continue;

    if( i == cg.weaponSelect )
      selectedItem = numItems;

    CG_RegisterWeapon( i );
    items[ numItems ] = i;
    numItems++;
  }

  for( i = UP_NONE + 1; i < UP_NUM_UPGRADES; i++ )
  {
    if( !BG_gotItem( i, cg.snap->ps.stats ) )
      continue;
    
    if( i == cg.weaponSelect - 32 )
      selectedItem = numItems;

    CG_RegisterUpgrade( i );
    items[ numItems ] = i + 32;
    numItems++;
  }

  for( i = 0; i < length; i++ )
  {
    int displacement = i - selectWindow;
    int item = displacement + selectedItem;
    
    if( ( item >= 0 ) && ( item < numItems ) )
    {
      if( items[ item ] <= 32 )
        CG_DrawPic( x + ICON_BORDER, y + ICON_BORDER, iconsize - 2 * ICON_BORDER, iconsize - 2 * ICON_BORDER,
                    cg_weapons[ items[ item ] ].weaponIcon );
      else if( items[ item ] > 32 )
        CG_DrawPic( x + ICON_BORDER, y + ICON_BORDER, iconsize - 2 * ICON_BORDER, iconsize - 2 * ICON_BORDER,
                    cg_upgrades[ items[ item ] - 32 ].upgradeIcon );

      if( displacement == 0 )
        CG_DrawPic( x, y, iconsize, iconsize, cgs.media.selectShader );
    }

    if( vertical )
      y += iconsize;
    else
      x += iconsize;
  }
}


/*
===================
CG_DrawWeaponSelectText
===================
*/
void CG_DrawWeaponSelectText( rectDef_t *rect, float scale, int textStyle )
{
  int x, w;
  char  *name;
  float *color;
  
  color = CG_FadeColor( cg.weaponSelectTime, WEAPON_SELECT_TIME );
  if( !color )
    return;
  
  trap_R_SetColor( color );
  
  // draw the selected name
  if( cg.weaponSelect <= 32 )
  {
    if( cg_weapons[ cg.weaponSelect ].registered &&
        BG_gotWeapon( cg.weaponSelect, cg.snap->ps.stats ) )
    {
      if( name = cg_weapons[ cg.weaponSelect ].humanName )
      {
        w = CG_Text_Width( name, scale, 0 );
        x = rect->x + rect->w / 2;
        CG_Text_Paint( x - w / 2, rect->y + rect->h, scale, color, name, 0, 0, textStyle );
      }
    }
  }
  else if( cg.weaponSelect > 32 )
  {
    if( cg_upgrades[ cg.weaponSelect - 32 ].registered &&
        BG_gotItem( cg.weaponSelect - 32, cg.snap->ps.stats ) )
    {
      if( name = cg_upgrades[ cg.weaponSelect - 32 ].humanName )
      {
        w = CG_Text_Width( name, scale, 0 );
        x = rect->x + rect->w / 2;
        CG_Text_Paint( x - w / 2, rect->y + rect->h, scale, color, name, 0, 0, textStyle );
      }
    }
  }

  trap_R_SetColor( NULL );
}


/*
===============
CG_WeaponSelectable
===============
*/
static qboolean CG_WeaponSelectable( int i )
{
  int ammo, clips, maxclips;

  BG_unpackAmmoArray( i, cg.snap->ps.ammo, cg.snap->ps.powerups, &ammo, &clips, &maxclips );
  
  if ( !ammo && !clips && !BG_FindInfinteAmmoForWeapon( i ) ) {
    return qfalse;
  }
  if ( !BG_gotWeapon( i, cg.snap->ps.stats ) ) {
    return qfalse;
  }

  return qtrue;
}


/*
===============
CG_ItemSelectable
===============
*/
static qboolean CG_ItemSelectable( int i )
{
  if( !BG_gotItem( i, cg.snap->ps.stats ) )
    return qfalse;

  return qtrue;
}


/*
===============
CG_NextWeapon_f
===============
*/
void CG_NextWeapon_f( void )
{
  int   i;
  int   original;

  if( !cg.snap )
    return;
  
  if( cg.snap->ps.pm_flags & PMF_FOLLOW )
    return;

  cg.weaponSelectTime = cg.time;
  original = cg.weaponSelect;

  for( i = 0; i < 64; i++ )
  {
    cg.weaponSelect++;
    if( cg.weaponSelect == 64 )
      cg.weaponSelect = 0;

    if( cg.weaponSelect <= 32 )
    {
      if( CG_WeaponSelectable( cg.weaponSelect ) )
        break;
    }
    else if( cg.weaponSelect > 32 )
    {
      if( CG_ItemSelectable( cg.weaponSelect - 32 ) )
        break;
    }
  }
  
  if( i == 64 )
    cg.weaponSelect = original;
}

/*
===============
CG_PrevWeapon_f
===============
*/
void CG_PrevWeapon_f( void )
{
  int   i;
  int   original;

  if( !cg.snap )
    return;
  
  if( cg.snap->ps.pm_flags & PMF_FOLLOW )
    return;

  cg.weaponSelectTime = cg.time;
  original = cg.weaponSelect;

  for( i = 0; i < 64; i++ )
  {
    cg.weaponSelect--;
    if( cg.weaponSelect == -1 )
      cg.weaponSelect = 63;
    
    if( cg.weaponSelect <= 32 )
    {
      if( CG_WeaponSelectable( cg.weaponSelect ) )
        break;
    }
    else if( cg.weaponSelect > 32 )
    {
      if( CG_ItemSelectable( cg.weaponSelect - 32 ) )
        break;
    }
  }
  
  if( i == 64 )
    cg.weaponSelect = original;
}

/*
===============
CG_Weapon_f
===============
*/
void CG_Weapon_f( void )
{
  int   num;

  if( !cg.snap )
    return;
  
  if( cg.snap->ps.pm_flags & PMF_FOLLOW )
    return;

  num = atoi( CG_Argv( 1 ) );

  if( num < 1 || num > 31 )
    return;

  cg.weaponSelectTime = cg.time;

  if( !BG_gotWeapon( num, cg.snap->ps.stats ) )
    return;   // don't have the weapon

  cg.weaponSelect = num;
}


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

WEAPON EVENTS

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

/*
================
CG_FireWeapon

Caused by an EV_FIRE_WEAPON event
================
*/
void CG_FireWeapon( centity_t *cent, int mode )
{
  entityState_t *ent;
  int       c;
  weaponInfo_t  *weap;

  ent = &cent->currentState;
  if( ent->weapon == WP_NONE )
    return;

  if( ent->weapon >= WP_NUM_WEAPONS )
  {
    CG_Error( "CG_FireWeapon: ent->weapon >= WP_NUM_WEAPONS" );
    return;
  }
  
  weap = &cg_weapons[ ent->weapon ];

  // mark the entity as muzzle flashing, so when it is added it will
  // append the flash to the weapon model
  cent->muzzleFlashTime = cg.time;

  if( ent->weapon == WP_GRAB_CLAW_UPG && mode == 1 )
    cent->firstPoisonTime = cg.time;

  // lightning gun only does this this on initial press
  if( ent->weapon == WP_TESLAGEN )
  {
    if( cent->pe.lightningFiring )
      return;
  }

  // play a sound
  for( c = 0; c < 4; c++ )
  {
    if( !weap->flashSound[ c ] )
      break;
  }
  
  if( c > 0 )
  {
    c = rand( ) % c;
    if( weap->flashSound[ c ] )
      trap_S_StartSound( NULL, ent->number, CHAN_WEAPON, weap->flashSound[ c ] );
  }

  // do brass ejection
  if( weap->ejectBrassFunc && cg_brassTime.integer > 0 )
    weap->ejectBrassFunc( cent );
}


/*
=================
CG_MissileHitWall

Caused by an EV_MISSILE_MISS event, or directly by local bullet tracing
=================
*/
void CG_MissileHitWall( int weapon, int clientNum, vec3_t origin, vec3_t dir, impactSound_t soundType, int damage ) {
  qhandle_t     mod;
  qhandle_t     mark;
  qhandle_t     shader;
  sfxHandle_t   sfx;
  float         radius;
  float         light;
  vec3_t        lightColor;
  localEntity_t *le;
  int           r, i;
  qboolean      alphaFade;
  qboolean      isSprite;
  int           duration;
  vec3_t        sprOrg;
  vec3_t        sprVel;

  mark = 0;
  radius = 32;
  sfx = 0;
  mod = 0;
  shader = 0;
  light = 0;
  lightColor[ 0 ] = 1;
  lightColor[ 1 ] = 1;
  lightColor[ 2 ] = 0;

  // set defaults
  isSprite = qfalse;
  duration = 600;

  switch( weapon )
  {
    default:
    case WP_TESLAGEN:
    case WP_AREA_ZAP:
    case WP_DIRECT_ZAP:
      mod = cgs.media.lightningExplosionModel;
      shader = cgs.media.lightningShader;
      sfx = cgs.media.sfx_lghit;
      mark = cgs.media.energyMarkShader;
      radius = 24;
      break;
      
    case WP_LOCKBLOB_LAUNCHER:
    case WP_POUNCE_UPG:
      sfx = cgs.media.gibBounce1Sound;
      mark = cgs.media.greenBloodMarkShader;
      radius = 64;
      isSprite = qtrue;
      break;
      
    case WP_FLAMER:
      sfx = cgs.media.sfx_flamerexp;
      mark = cgs.media.burnMarkShader;
      radius = 32;
      break;
      
    case WP_PULSE_RIFLE:
      mod = cgs.media.ringFlashModel;
      shader = cgs.media.plasmaExplosionShader;
      sfx = cgs.media.sfx_plasmaexp;
      mark = cgs.media.energyMarkShader;
      radius = 16;
      break;
      
    case WP_MASS_DRIVER:
      shader = cgs.media.bulletExplosionShader;
      mark = cgs.media.bulletMarkShader;
      radius = 8;
      break;
      
    case WP_MACHINEGUN:
    case WP_CHAINGUN:
    case WP_LAS_GUN:
      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;
      
   #define LCANON_EJECTION_VEL 300
      
    case WP_LUCIFER_CANON:
      mod = cgs.media.dishFlashModel;
      shader = cgs.media.bfgExplosionShader;
      mark = cgs.media.bulletMarkShader;
      radius = 8;
      sfx = cgs.media.sfx_plasmaexp;
      isSprite = qtrue;
      
      for( i = 0; i <= damage / 20; i++ )
      {
        qhandle_t spark;
        vec3_t    velocity;
        vec3_t    accel = { 0.0f, 0.0f, -DEFAULT_GRAVITY };

        VectorMA( origin, 1.0f, dir, origin );

        if( random( ) > 0.5f )
          spark = cgs.media.gibSpark1;
        else
          spark = cgs.media.scannerBlipShader;

        velocity[ 0 ] = ( 2 * random( ) - 1.0f ) * LCANON_EJECTION_VEL;
        velocity[ 1 ] = ( 2 * random( ) - 1.0f ) * LCANON_EJECTION_VEL;
        velocity[ 2 ] = ( 2 * random( ) - 1.0f ) * LCANON_EJECTION_VEL;
        
        CG_LaunchSprite( origin, velocity, accel, 0.0f,
                         0.9f, 1.0f, 40.0f, 255, 0, rand( ) % 360,
                         cg.time, cg.time, 2000 + ( crandom( ) * 1000 ),
                         spark, qfalse, qfalse );
      }
      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 );
  }

  //
  // impact mark
  //
  // plasma fades alpha, all others fade color
  alphaFade = ( mark == cgs.media.energyMarkShader ||
                mark == cgs.media.greenBloodMarkShader );
  
  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, int damage )
{
  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:
      CG_MissileHitWall( weapon, 0, origin, dir, IMPACTSOUND_FLESH );
      break;*/
    default:
      break;
  }
}


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

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_LasGunHit

Renders las gun effects.
======================
*/
void CG_LasGunHit( vec3_t end, int sourceEntityNum, vec3_t normal, qboolean flesh, int fleshEntityNum )
{
  trace_t trace;
  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 ) )
    {
      // 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_LAS_GUN, 0, end, normal, IMPACTSOUND_DEFAULT, 0 );
}

/*
======================
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, 0 );
}