apps/plugins/doom/d_net.c

   1 /* Emacs style mode select   -*- C++ -*-
   2  *-----------------------------------------------------------------------------
   3  *
   4  *
   5  *  PrBoom a Doom port merged with LxDoom and LSDLDoom
   6  *  based on BOOM, a modified and improved DOOM engine
   7  *  Copyright (C) 1999 by
   8  *  id Software, Chi Hoang, Lee Killough, Jim Flynn, Rand Phares, Ty Halderman
   9  *  Copyright (C) 1999-2000 by
  10  *  Jess Haas, Nicolas Kalkhof, Colin Phipps, Florian Schulze
  11  *
  12  *  This program is free software; you can redistribute it and/or
  13  *  modify it under the terms of the GNU General Public License
  14  *  as published by the Free Software Foundation; either version 2
  15  *  of the License, or (at your option) any later version.
  16  *
  17  *  This program is distributed in the hope that it will be useful,
  18  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  *  GNU General Public License for more details.
  21  *
  22  *  You should have received a copy of the GNU General Public License
  23  *  along with this program; if not, write to the Free Software
  24  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  25  *  02111-1307, USA.
  26  *
  27  * DESCRIPTION:
  28  *    Network client. Passes information to/from server, staying
  29  *    synchronised.
  30  *    Contains the main wait loop, waiting for network input or
  31  *    time before doing the next tic.
  32  *    Rewritten for LxDoom, but based around bits of the old code.
  33  *
  34  *-----------------------------------------------------------------------------
  35  */
  36
  37 #include "m_menu.h"
  38 #include "i_system.h"
  39 #include "i_video.h"
  40 #include "i_sound.h"
  41 #include "g_game.h"
  42 #include "doomdef.h"
  43 #include "doomstat.h"
  44
  45 #include "rockmacros.h"
  46
  47 #define NCMD_EXIT  0x80000000
  48 #define NCMD_RETRANSMIT  0x40000000
  49 #define NCMD_SETUP  0x20000000
  50 #define NCMD_KILL  0x10000000 // kill game
  51 #define NCMD_CHECKSUM   0x0fffffff
  52
  53
  54 doomcom_t* doomcom;
  55
  56 static boolean   server=0;
  57 static int       remotetic; // Tic expected from the remote
  58 static int       remotesend; // Tic expected by the remote
  59
  60 //
  61 // NETWORKING
  62 //
  63 // gametic is the tic about to (or currently being) run
  64 // maketic is the tick that hasn't had control made for it yet
  65 // nettics[] has the maketics for all players
  66 //
  67 // a gametic cannot be run until nettics[] > gametic for all players
  68 //
  69
  70 static ticcmd_t* localcmds;
  71
  72 ticcmd_t        netcmds[MAXPLAYERS][BACKUPTICS];
  73
  74 int             maketic;
  75 int  ticdup=1;
  76
  77 void G_BuildTiccmd (ticcmd_t *cmd);
  78 void D_DoAdvanceDemo (void);
  79
  80 void D_InitNetGame (void)
  81 {
  82    int i;
  83
  84    doomcom = Z_Malloc(sizeof *doomcom, PU_STATIC, NULL);
  85    doomcom->consoleplayer = 0;
  86    doomcom->numnodes = 0; doomcom->numplayers = 1;
  87    localcmds = netcmds[consoleplayer];
  88
  89    for (i=0; i<doomcom->numplayers; i++)
  90       playeringame[i] = true;
  91    for (; i<MAXPLAYERS; i++)
  92       playeringame[i] = false;
  93
  94    consoleplayer = displayplayer = doomcom->consoleplayer;
  95 }
  96
  97 void D_BuildNewTiccmds()
  98 {
  99    static int lastmadetic;
 100    int newtics = I_GetTime() - lastmadetic;
 101    lastmadetic += newtics;
 102    while (newtics--)
 103    {
 104       I_StartTic();
 105       if (maketic - gametic > BACKUPTICS/2) break;
 106       G_BuildTiccmd(&localcmds[maketic%BACKUPTICS]);
 107       maketic++;
 108    }
 109 }
 110
 111 //
 112 // TryRunTics
 113 //
 114 extern boolean advancedemo;
 115
 116 void TryRunTics (void)
 117 {
 118    int runtics;
 119    int entertime = I_GetTime();
 120
 121    // Wait for tics to run
 122    while (1) {
 123       D_BuildNewTiccmds();
 124       runtics = (server ? remotetic : maketic) - gametic;
 125       if (!runtics) {
 126 //         if (server) I_WaitForPacket(ms_to_next_tick);
 127 //         else I_uSleep(ms_to_next_tick*1000);
 128 //         rb->sleep(ms_to_next_tick);
 129          if (I_GetTime() - entertime > 10) {
 130             remotesend--;
 131 //            {
 132 //               char buf[sizeof(packet_header_t)+1];
 133 //               packet_set((packet_header_t *)buf, PKT_RETRANS, remotetic);
 134 //               buf[sizeof(buf)-1] = consoleplayer;
 135 //               I_SendPacket((packet_header_t *)buf, sizeof buf);
 136 //            }
 137             M_Ticker(); return;
 138          }
 139       } else break;
 140    }
 141
 142    while (runtics--) {
 143       if (advancedemo)
 144          D_DoAdvanceDemo ();
 145       M_Ticker ();
 146       G_Ticker ();
 147       gametic++;
 148    }
 149 }