// Get player's origin 
 static origin[3] 
 get_user_origin(ID_NVISION, origin) 
  
 // Nightvision message 
 message_begin(MSG_ONE_UNRELIABLE, SVC_TEMPENTITY, _, ID_NVISION) 
 write_byte(TE_DLIGHT) // TE id 
 write_coord(origin[0]) // x 
 write_coord(origin[1]) // y 
 write_coord(origin[2]) // z 
 write_byte(get_pcvar_num(cvar_nvgsize)) // radius 
  
 // Nemesis / Madness / Spectator in nemesis round 
 if (g_nemesis[ID_NVISION] || (g_zombie[ID_NVISION] && g_nodamage[ID_NVISION]) || (!g_isalive[ID_NVISION] && g_nemround)) 
 { 
  write_byte(get_pcvar_num(cvar_nemnvgcolor[0])) // r 
  write_byte(get_pcvar_num(cvar_nemnvgcolor[1])) // g 
  write_byte(get_pcvar_num(cvar_nemnvgcolor[2])) // b 
 } 
 // Human / Spectator in normal round 
 else if (!g_zombie[ID_NVISION] || !g_isalive[ID_NVISION]) 
 { 
  write_byte(get_pcvar_num(cvar_humnvgcolor[0])) // r 
  write_byte(get_pcvar_num(cvar_humnvgcolor[1])) // g 
  write_byte(get_pcvar_num(cvar_humnvgcolor[2])) // b 
 } 
 // Zombie 
 else 
 { 
  write_byte(get_pcvar_num(cvar_nvgcolor[0])) // r 
  write_byte(get_pcvar_num(cvar_nvgcolor[1])) // g 
  write_byte(get_pcvar_num(cvar_nvgcolor[2])) // b 
 } 
  
 write_byte(5) // life 
 write_byte(0) // decay rate 
  message_end() 
       if (!g_nvision[ID_NVISION] || !g_nvisionenabled[ID_NVISION]) 
       { 
              // Task not needed anymore 
              emit_sound(ID_NVISION,CHAN_ITEM,"items/nvg_off.wav",1.0,ATTN_NORM,0,PITCH_NORM)  
              remove_task(taskid); 
              return; 
       } 
  
       if (!is_user_alive(ID_NVISION)) return 
  
       if (g_zombie[ID_NVISION] || g_nemesis[ID_NVISION]) 
       { 
       message_begin(MSG_ONE_UNRELIABLE, get_user_msgid("ScreenFade"),{0,0,0},ID_NVISION)  
       write_short(1000) //更新速率 
       write_short(1000) //更新速率 
       write_short(1<<12)  
       write_byte(get_pcvar_num(cvar_nvgscolor[0])) //红 
       write_byte(get_pcvar_num(cvar_nvgscolor[1])) //绿 
       write_byte(get_pcvar_num(cvar_nvgscolor[2])) //蓝 
       write_byte(100) //清晰度 
       message_end() 
       } 
       else 
       { 
       message_begin(MSG_ONE_UNRELIABLE, get_user_msgid("ScreenFade"),{0,0,0},ID_NVISION)  
       write_short(1000) //更新速率 
       write_short(1000) //更新速率 
       write_short(1<<12)  
       write_byte(get_pcvar_num(cvar_humsnvgcolor[0])) //红 
       write_byte(get_pcvar_num(cvar_humsnvgcolor[1])) //绿 
       write_byte(get_pcvar_num(cvar_humsnvgcolor[2])) //蓝 
       write_byte(100) //清晰度 
       message_end() 
       }  
}