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ref: fd0c011dcc9d56d366d62c38695d5e8dd47643c7
dir: /src/strife/g_game.c/

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// Emacs style mode select   -*- C++ -*- 
//-----------------------------------------------------------------------------
//
// Copyright(C) 1993-1996 Id Software, Inc.
// Copyright(C) 2005 Simon Howard
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// 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.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
// 02111-1307, USA.
//
// DESCRIPTION:  none
//
//-----------------------------------------------------------------------------



#include <string.h>
#include <stdlib.h>
#include <math.h>

#include "doomdef.h" 
#include "doomkeys.h"
#include "doomstat.h"

#include "deh_main.h"
#include "deh_misc.h"
#include "z_zone.h"
#include "f_finale.h"
#include "m_argv.h"
#include "m_controls.h"
#include "m_misc.h"
#include "m_menu.h"
#include "m_random.h"
#include "i_system.h"
#include "i_timer.h"
#include "i_video.h"
#include "p_setup.h"
#include "p_saveg.h"
#include "p_tick.h"
#include "d_main.h"
#include "wi_stuff.h"
#include "hu_stuff.h"
#include "st_stuff.h"
#include "am_map.h"

// Needs access to LFB.
#include "v_video.h"

#include "w_wad.h"

#include "p_local.h" 

#include "s_sound.h"

// Data.
#include "dstrings.h"
#include "sounds.h"

// SKY handling - still the wrong place.
#include "r_data.h"
#include "r_sky.h"

#include "p_dialog.h"   // villsa [STRIFE]

#include "g_game.h"


#define SAVEGAMESIZE	0x2c000

boolean	G_CheckDemoStatus (void); 
void	G_ReadDemoTiccmd (ticcmd_t* cmd); 
void	G_WriteDemoTiccmd (ticcmd_t* cmd); 
void	G_PlayerReborn (int player); 
void	G_InitNew (skill_t skill, int episode, int map); 
 
void	G_DoReborn (int playernum); 
 
void	G_DoLoadLevel (void); 
void	G_DoNewGame (void); 
void	G_DoLoadGame (void); 
void	G_DoPlayDemo (void); 
void	G_DoCompleted (void); 
void	G_DoVictory (void); 
void	G_DoWorldDone (void); 
void	G_DoSaveGame (void); 
 
// Gamestate the last time G_Ticker was called.

gamestate_t     oldgamestate; 
 
gameaction_t    gameaction; 
gamestate_t     gamestate; 
skill_t         gameskill; 
boolean		respawnmonsters;
int             gameepisode; 
int             gamemap;

// haleyjd 08/24/10: [STRIFE] New variables
int             destmap;   // current destination map when exiting
int             riftdest;  // destination spot for player
angle_t         riftangle; // player angle saved during exit

// If non-zero, exit the level after this number of minutes.

int             timelimit;

boolean         paused; 
boolean         sendpause;             	// send a pause event next tic 
boolean         sendsave;             	// send a save event next tic 
boolean         usergame;               // ok to save / end game 
 
boolean         timingdemo;             // if true, exit with report on completion 
boolean         nodrawers;              // for comparative timing purposes 
int             starttime;          	// for comparative timing purposes  	 
 
boolean         viewactive; 
 
boolean         deathmatch;           	// only if started as net death 
boolean         netgame;                // only true if packets are broadcast 
boolean         playeringame[MAXPLAYERS]; 
player_t        players[MAXPLAYERS]; 

boolean         turbodetected[MAXPLAYERS];
 
int             consoleplayer;          // player taking events and displaying 
int             displayplayer;          // view being displayed 
int             gametic; 
int             levelstarttic;          // gametic at level start 
int             totalkills, totalitems, totalsecret;    // for intermission 
 
char            demoname[32]; 
boolean         demorecording; 
boolean         longtics;               // cph's doom 1.91 longtics hack
boolean         lowres_turn;            // low resolution turning for longtics
boolean         demoplayback; 
boolean		netdemo; 
byte*		demobuffer;
byte*		demo_p;
byte*		demoend; 
boolean         singledemo;            	// quit after playing a demo from cmdline 
 
boolean         precache = true;        // if true, load all graphics at start 

boolean         testcontrols = false;    // Invoked by setup to test controls
 
wbstartstruct_t wminfo;               	// parms for world map / intermission 
 
byte		consistancy[MAXPLAYERS][BACKUPTICS]; 
 
#define MAXPLMOVE		(forwardmove[1]) 
 
#define TURBOTHRESHOLD	0x32

fixed_t         forwardmove[2] = {0x19, 0x32}; 
fixed_t         sidemove[2] = {0x18, 0x28}; 
fixed_t         angleturn[3] = {640, 1280, 320};    // + slow turn 

int mouse_fire_countdown = 0;    // villsa [STRIFE]

static int *weapon_keys[] = {
    &key_weapon1,
    &key_weapon2,
    &key_weapon3,
    &key_weapon4,
    &key_weapon5,
    &key_weapon6,
    &key_weapon7,
    &key_weapon8
};

// Set to -1 or +1 to switch to the previous or next weapon.

static int next_weapon = 0;

// Used for prev/next weapon keys.
// STRIFE-TODO: Check this table makes sense.

static const struct
{
    weapontype_t weapon;
    weapontype_t weapon_num;
} weapon_order_table[] = {
    { wp_fist,                  wp_fist },
    { wp_elecbow,               wp_elecbow },
    { wp_poisonbow,             wp_elecbow },
    { wp_rifle,                 wp_rifle },
    { wp_missile,               wp_missile },
    { wp_hegrenade,             wp_hegrenade },
    { wp_wpgrenade,             wp_hegrenade },
    { wp_flame,                 wp_flame },
    { wp_mauler,                wp_mauler },
    { wp_torpedo,               wp_mauler },
    { wp_sigil,                 wp_sigil },
};

#define SLOWTURNTICS	6 
 
#define NUMKEYS		256 
#define MAX_JOY_BUTTONS 20

static boolean  gamekeydown[NUMKEYS]; 
static int      turnheld;		// for accelerative turning 
 
static boolean  mousearray[MAX_MOUSE_BUTTONS + 1];
static boolean *mousebuttons = &mousearray[1];  // allow [-1]

// mouse values are used once 
int             mousex;
int             mousey;         

static int      dclicktime;
static boolean  dclickstate;
static int      dclicks; 
static int      dclicktime2;
static boolean  dclickstate2;
static int      dclicks2;

// joystick values are repeated 
static int      joyxmove;
static int      joyymove;
static boolean  joyarray[MAX_JOY_BUTTONS + 1]; 
static boolean *joybuttons = &joyarray[1];		// allow [-1] 
 
static int      savegameslot; 
static char     savedescription[32]; 
 
static int      testcontrols_mousespeed;
 
#define	BODYQUESIZE	32

mobj_t*		bodyque[BODYQUESIZE]; 
int		bodyqueslot; 
 
int             vanilla_savegame_limit = 1;
int             vanilla_demo_limit = 1;
 

#define MOUSE_SPEED_BOX_WIDTH 16
#define COLOR_RED    0xb0
#define COLOR_BLACK  0x00
#define COLOR_WHITE  0x04
#define COLOR_YELLOW 0xe7

void G_DrawMouseSpeedBox(void)
{
    extern int usemouse;
    int i;
    int box_x, box_y;
    int original_speed;
    int x, y;
    int redline_x;
    int linelen;
    char *lumpname;
    int color;

    // If the mouse is turned off or acceleration is turned off, don't
    // draw the box at all.

    if (!usemouse || fabs(mouse_acceleration - 1) < 0.01)
    {
        return;
    }

    // Calculate box position

    box_x = SCREENWIDTH - MOUSE_SPEED_BOX_WIDTH * 8;
    box_y = SCREENHEIGHT - 9;

    // Draw the box.

    x = box_x;
    
    for (i=0; i<MOUSE_SPEED_BOX_WIDTH; ++i)
    {
        if (i == 0)
        {
            lumpname = "M_LSLEFT";
        }
        else if (i == MOUSE_SPEED_BOX_WIDTH - 1)
        {
            lumpname = "M_LSRGHT";
        }
        else
        {
            lumpname = "M_LSCNTR";
        }

        V_DrawPatchDirect(x, box_y,
                          W_CacheLumpName(DEH_String(lumpname), PU_CACHE));
        x += 8;
    }

    // Calculate the position of the red line.  This is 1/3 of the way
    // along the box.

    redline_x = (MOUSE_SPEED_BOX_WIDTH / 3) * 8;

    // Undo acceleration and get back the original mouse speed

    if (testcontrols_mousespeed < mouse_threshold)
    {
        original_speed = testcontrols_mousespeed;
    }
    else
    {
        original_speed = testcontrols_mousespeed - mouse_threshold;
        original_speed = (int) (original_speed / mouse_acceleration);
        original_speed += mouse_threshold;
    }

    // Calculate line length

    linelen = (original_speed * redline_x) / mouse_threshold;

    // Draw horizontal "thermometer" 

    for (x=0; x<(MOUSE_SPEED_BOX_WIDTH - 1) * 8; ++x)
    {
        if (x < linelen)
        {
            if (x < redline_x)
            {
                color = COLOR_WHITE;
            }
            else
            {
                color = COLOR_YELLOW;
            }
        }
        else
        {
            color = COLOR_BLACK;
        }

        I_VideoBuffer[(box_y - 4) * SCREENWIDTH + box_x + x + 1] = color;
    }

    // Draw red line

    for (y=box_y - 8; y<box_y; ++y)
    {
        I_VideoBuffer[y * SCREENWIDTH + box_x + redline_x] = COLOR_RED;
    }
}
 
int G_CmdChecksum (ticcmd_t* cmd) 
{ 
    size_t		i;
    int		sum = 0; 
	 
    for (i=0 ; i< sizeof(*cmd)/4 - 1 ; i++) 
	sum += ((int *)cmd)[i]; 
		 
    return sum; 
} 

static boolean WeaponSelectable(weapontype_t weapon)
{
    // Can't select a weapon if we don't own it.

    if (!players[consoleplayer].weaponowned[weapon])
    {
        return false;
    }

    // STRIFE-TODO: Special weapon cycling rules?

    return true;
}

static int G_NextWeapon(int direction)
{
    weapontype_t weapon;
    int i;

    // Find index in the table.

    if (players[consoleplayer].pendingweapon == wp_nochange)
    {
        weapon = players[consoleplayer].readyweapon;
    }
    else
    {
        weapon = players[consoleplayer].pendingweapon;
    }

    for (i=0; i<arrlen(weapon_order_table); ++i)
    {
        if (weapon_order_table[i].weapon == weapon)
        {
            break;
        }
    }

    // Switch weapon.

    do
    {
        i += direction;
        i = (i + arrlen(weapon_order_table)) % arrlen(weapon_order_table);
    } while (!WeaponSelectable(weapon_order_table[i].weapon));

    return weapon_order_table[i].weapon_num;
}

//
// G_BuildTiccmd
// Builds a ticcmd from all of the available inputs
// or reads it from the demo buffer. 
// If recording a demo, write it out 
// 
void G_BuildTiccmd (ticcmd_t* cmd) 
{ 
    int		i; 
    boolean	strafe;
    boolean	bstrafe; 
    int		speed;
    int		tspeed; 
    int		forward;
    int		side;

    memset(cmd, 0, sizeof(ticcmd_t));

    cmd->consistancy = 
	consistancy[consoleplayer][maketic%BACKUPTICS]; 

    // villsa [STRIFE] look up key
    if(gamekeydown[key_lookup])
        cmd->buttons2 |= BT2_LOOKUP;

    // villsa [STRIFE] look down key
    if(gamekeydown[key_lookdown])
        cmd->buttons2 |= BT2_LOOKDOWN;

    // villsa [STRIFE] inventory use key
    if(gamekeydown[key_invuse])
    {
        player_t* player = &players[consoleplayer];
        if(player->numinventory > 0)
        {
            cmd->buttons2 |= BT2_INVUSE;
            cmd->inventory = player->inventory[player->inventorycursor].sprite;
        }
    }

    // villsa [STRIFE] inventory drop key
    if(gamekeydown[key_invdrop])
    {
        player_t* player = &players[consoleplayer];
        if(player->numinventory > 0)
        {
            cmd->buttons2 |= BT2_INVDROP;
            cmd->inventory = player->inventory[player->inventorycursor].sprite;
        }
    }

    // villsa [STRIFE] use medkit
    if(gamekeydown[key_usehealth])
        cmd->buttons2 |= BT2_HEALTH;


 
    strafe = gamekeydown[key_strafe] || mousebuttons[mousebstrafe] 
	|| joybuttons[joybstrafe]; 

    // fraggle: support the old "joyb_speed = 31" hack which
    // allowed an autorun effect

    speed = key_speed >= NUMKEYS
         || joybspeed >= MAX_JOY_BUTTONS
         || gamekeydown[key_speed] 
         || joybuttons[joybspeed];
 
    forward = side = 0;

    // villsa [STRIFE] running causes centerview to occur
    if(speed)
        cmd->buttons2 |= BT2_CENTERVIEW;

    // villsa [STRIFE] disable running if low on health
    if (players[consoleplayer].health <= 15)
        speed = 0;
    
    // use two stage accelerative turning
    // on the keyboard and joystick
    if (joyxmove < 0
	|| joyxmove > 0  
	|| gamekeydown[key_right]
	|| gamekeydown[key_left]) 
	turnheld += ticdup; 
    else 
	turnheld = 0; 

    if (turnheld < SLOWTURNTICS) 
	tspeed = 2;             // slow turn 
    else 
	tspeed = speed;
    
    // let movement keys cancel each other out
    if (strafe) 
    { 
	if (gamekeydown[key_right]) 
	{
	    // fprintf(stderr, "strafe right\n");
	    side += sidemove[speed]; 
	}
	if (gamekeydown[key_left]) 
	{
	    //	fprintf(stderr, "strafe left\n");
	    side -= sidemove[speed]; 
	}
	if (joyxmove > 0) 
	    side += sidemove[speed]; 
	if (joyxmove < 0) 
	    side -= sidemove[speed]; 
 
    } 
    else 
    { 
	if (gamekeydown[key_right]) 
	    cmd->angleturn -= angleturn[tspeed]; 
	if (gamekeydown[key_left]) 
	    cmd->angleturn += angleturn[tspeed]; 
	if (joyxmove > 0) 
	    cmd->angleturn -= angleturn[tspeed]; 
	if (joyxmove < 0) 
	    cmd->angleturn += angleturn[tspeed]; 
    } 
 
    if (gamekeydown[key_up]) 
    {
	// fprintf(stderr, "up\n");
	forward += forwardmove[speed]; 
    }
    if (gamekeydown[key_down]) 
    {
	// fprintf(stderr, "down\n");
	forward -= forwardmove[speed]; 
    }

    if (joyymove < 0) 
        forward += forwardmove[speed]; 
    if (joyymove > 0) 
        forward -= forwardmove[speed]; 

    if (gamekeydown[key_strafeleft]
     || joybuttons[joybstrafeleft]
     || mousebuttons[mousebstrafeleft]) 
    {
        side -= sidemove[speed];
    }

    if (gamekeydown[key_straferight]
     || joybuttons[joybstraferight]
     || mousebuttons[mousebstraferight])
    {
        side += sidemove[speed]; 
    }

    // buttons
    cmd->chatchar = HU_dequeueChatChar(); 

    // villsa [STRIFE] TODO - add mouse button support for jump
    if(gamekeydown[key_jump] /*|| mousebuttons[mousebjump]*/)
        cmd->buttons2 |= BT2_JUMP;
 
    // villsa [STRIFE]: Moved mousebuttons[mousebfire] to below
    if (gamekeydown[key_fire] || joybuttons[joybfire]) 
        cmd->buttons |= BT_ATTACK;

    // villsa [STRIFE]
    if(mousebuttons[mousebfire])
    {
         if(mouse_fire_countdown <= 0)
             cmd->buttons |= BT_ATTACK;
         else
             --mouse_fire_countdown;
    }
 
    if (gamekeydown[key_use]
     || joybuttons[joybuse]
     || mousebuttons[mousebuse])
    { 
	cmd->buttons |= BT_USE;
	// clear double clicks if hit use button 
	dclicks = 0;                   
    } 

    // If the previous or next weapon button is pressed, the
    // next_weapon variable is set to change weapons when
    // we generate a ticcmd.  Choose a new weapon.

    if (next_weapon != 0)
    {
        i = G_NextWeapon(next_weapon);
        cmd->buttons |= BT_CHANGE;
        cmd->buttons |= i << BT_WEAPONSHIFT;
        next_weapon = 0;
    }
    else
    {
        // Check weapon keys.

        for (i=0; i<arrlen(weapon_keys); ++i)
        {
            int key = *weapon_keys[i];

            if (gamekeydown[key])
            {
                cmd->buttons |= BT_CHANGE;
                cmd->buttons |= i<<BT_WEAPONSHIFT;
                break;
            }
        }
    }

    // mouse
    if (mousebuttons[mousebforward]) 
    {
	forward += forwardmove[speed];
    }
    if (mousebuttons[mousebbackward])
    {
        forward -= forwardmove[speed];
    }

    if (dclick_use)
    {
        // forward double click
        if (mousebuttons[mousebforward] != dclickstate && dclicktime > 1 ) 
        { 
            dclickstate = mousebuttons[mousebforward]; 
            if (dclickstate) 
                dclicks++; 
            if (dclicks == 2) 
            { 
                cmd->buttons |= BT_USE; 
                dclicks = 0; 
            } 
            else 
                dclicktime = 0; 
        } 
        else 
        { 
            dclicktime += ticdup; 
            if (dclicktime > 20) 
            { 
                dclicks = 0; 
                dclickstate = 0; 
            } 
        }
        
        // strafe double click
        bstrafe =
            mousebuttons[mousebstrafe] 
            || joybuttons[joybstrafe]; 
        if (bstrafe != dclickstate2 && dclicktime2 > 1 ) 
        { 
            dclickstate2 = bstrafe; 
            if (dclickstate2) 
                dclicks2++; 
            if (dclicks2 == 2) 
            { 
                cmd->buttons |= BT_USE; 
                dclicks2 = 0; 
            } 
            else 
                dclicktime2 = 0; 
        } 
        else 
        { 
            dclicktime2 += ticdup; 
            if (dclicktime2 > 20) 
            { 
                dclicks2 = 0; 
                dclickstate2 = 0; 
            } 
        } 
    }

    forward += mousey; 

    if (strafe) 
	side += mousex*2; 
    else 
	cmd->angleturn -= mousex*0x8; 

    if (mousex == 0)
    {
        // No movement in the previous frame

        testcontrols_mousespeed = 0;
    }
    
    mousex = mousey = 0; 
	 
    if (forward > MAXPLMOVE) 
	forward = MAXPLMOVE; 
    else if (forward < -MAXPLMOVE) 
	forward = -MAXPLMOVE; 
    if (side > MAXPLMOVE) 
	side = MAXPLMOVE; 
    else if (side < -MAXPLMOVE) 
	side = -MAXPLMOVE; 
 
    cmd->forwardmove += forward; 
    cmd->sidemove += side;
    
    // special buttons
    if (sendpause) 
    { 
	sendpause = false; 
	cmd->buttons = BT_SPECIAL | BTS_PAUSE; 
    } 
 
    if (sendsave) 
    { 
	sendsave = false; 
	cmd->buttons = BT_SPECIAL | BTS_SAVEGAME | (savegameslot<<BTS_SAVESHIFT); 
    } 

    // low-res turning

    if (lowres_turn)
    {
        static signed short carry = 0;
        signed short desired_angleturn;

        desired_angleturn = cmd->angleturn + carry;

        // round angleturn to the nearest 256 unit boundary
        // for recording demos with single byte values for turn

        cmd->angleturn = (desired_angleturn + 128) & 0xff00;

        // Carry forward the error from the reduced resolution to the
        // next tic, so that successive small movements can accumulate.

        carry = desired_angleturn - cmd->angleturn;
    }
} 
 

//
// G_DoLoadLevel 
//
extern  gamestate_t     wipegamestate; 
 
void G_DoLoadLevel (void) 
{ 
    int             i; 

    // Set the sky map.
    // First thing, we have a dummy sky texture name,
    //  a flat. The data is in the WAD only because
    //  we look for an actual index, instead of simply
    //  setting one.

    skyflatnum = R_FlatNumForName(DEH_String(SKYFLATNAME));

    levelstarttic = gametic;        // for time calculation
    
    if (wipegamestate == GS_LEVEL) 
	wipegamestate = -1;             // force a wipe 

    gamestate = GS_LEVEL; 

    for (i=0 ; i<MAXPLAYERS ; i++) 
    { 
	turbodetected[i] = false;
	if (playeringame[i] && players[i].playerstate == PST_DEAD) 
	    players[i].playerstate = PST_REBORN; 
	memset (players[i].frags,0,sizeof(players[i].frags)); 
    } 
		 
    P_SetupLevel (gameepisode, gamemap, 0, gameskill);    
    displayplayer = consoleplayer;		// view the guy you are playing    
    gameaction = ga_nothing; 
    Z_CheckHeap ();
    
    // clear cmd building stuff

    memset (gamekeydown, 0, sizeof(gamekeydown)); 
    joyxmove = joyymove = 0; 
    mousex = mousey = 0; 
    sendpause = sendsave = paused = false; 
    memset (mousebuttons, 0, sizeof(mousebuttons)); 
    memset (joybuttons, 0, sizeof(joybuttons)); 

    if (testcontrols)
    {
        players[consoleplayer].message = "Press escape to quit.";
    }

    P_DialogLoad(); // villsa [STRIFE]
} 

static void SetJoyButtons(unsigned int buttons_mask)
{
    int i;

    for (i=0; i<MAX_JOY_BUTTONS; ++i)
    {
        int button_on = (buttons_mask & (1 << i)) != 0;

        // Detect button press:

        if (!joybuttons[i] && button_on)
        {
            // Weapon cycling:

            if (i == joybprevweapon)
            {
                next_weapon = -1;
            }
            else if (i == joybnextweapon)
            {
                next_weapon = 1;
            }
        }

        joybuttons[i] = button_on;
    }
}

static void SetMouseButtons(unsigned int buttons_mask)
{
    int i;

    for (i=0; i<MAX_MOUSE_BUTTONS; ++i)
    {
        unsigned int button_on = (buttons_mask & (1 << i)) != 0;

        // Detect button press:

        if (!mousebuttons[i] && button_on)
        {
            if (i == mousebprevweapon)
            {
                next_weapon = -1;
            }
            else if (i == mousebnextweapon)
            {
                next_weapon = 1;
            }
        }

	mousebuttons[i] = button_on;
    }
}

//
// G_Responder  
// Get info needed to make ticcmd_ts for the players.
// 
boolean G_Responder (event_t* ev) 
{ 
    // allow spy mode changes even during the demo
    if (gamestate == GS_LEVEL && ev->type == ev_keydown 
     && ev->data1 == key_spy && (singledemo || !deathmatch) )
    {
	// spy mode 
	do 
	{ 
	    displayplayer++; 
	    if (displayplayer == MAXPLAYERS) 
		displayplayer = 0; 
	} while (!playeringame[displayplayer] && displayplayer != consoleplayer); 
	return true; 
    }
    
    // any other key pops up menu if in demos
    if (gameaction == ga_nothing && !singledemo && 
	(demoplayback || gamestate == GS_DEMOSCREEN) 
	) 
    { 
	if (ev->type == ev_keydown ||  
	    (ev->type == ev_mouse && ev->data1) || 
	    (ev->type == ev_joystick && ev->data1) ) 
	{ 
	    M_StartControlPanel (); 
	    return true; 
	} 
	return false; 
    } 

    if (gamestate == GS_LEVEL) 
    { 
#if 0 
	if (devparm && ev->type == ev_keydown && ev->data1 == ';') 
	{ 
	    G_DeathMatchSpawnPlayer (0); 
	    return true; 
	} 
#endif 
	if (HU_Responder (ev)) 
	    return true;	// chat ate the event 
	if (ST_Responder (ev)) 
	    return true;	// status window ate it 
	if (AM_Responder (ev)) 
	    return true;	// automap ate it 
    } 
	 
    if (gamestate == GS_FINALE) 
    { 
	if (F_Responder (ev)) 
	    return true;	// finale ate the event 
    } 

    if (testcontrols && ev->type == ev_mouse)
    {
        // If we are invoked by setup to test the controls, save the 
        // mouse speed so that we can display it on-screen.
        // Perform a low pass filter on this so that the thermometer 
        // appears to move smoothly.

        testcontrols_mousespeed = abs(ev->data2);
    }

    // If the next/previous weapon keys are pressed, set the next_weapon
    // variable to change weapons when the next ticcmd is generated.

    if (ev->type == ev_keydown && ev->data1 == key_prevweapon)
    {
        next_weapon = -1;
    }
    else if (ev->type == ev_keydown && ev->data1 == key_nextweapon)
    {
        next_weapon = 1;
    }

    switch (ev->type) 
    { 
      case ev_keydown: 
	if (ev->data1 == key_pause) 
	{ 
	    sendpause = true; 
	}
        else if (ev->data1 <NUMKEYS) 
        {
	    gamekeydown[ev->data1] = true; 
        }

	return true;    // eat key down events 
 
      case ev_keyup: 
	if (ev->data1 <NUMKEYS) 
	    gamekeydown[ev->data1] = false; 
	return false;   // always let key up events filter down 
		 
      case ev_mouse: 
        SetMouseButtons(ev->data1);
	mousex = ev->data2*(mouseSensitivity+5)/10; 
	mousey = ev->data3*(mouseSensitivity+5)/10; 
	return true;    // eat events 
 
      case ev_joystick: 
        SetJoyButtons(ev->data1);
	joyxmove = ev->data2; 
	joyymove = ev->data3; 
	return true;    // eat events 
 
      default: 
	break; 
    } 
 
    return false; 
} 

//
// G_Ticker
// Make ticcmd_ts for the players.
//
void G_Ticker (void) 
{ 
    int		i;
    int		buf; 
    ticcmd_t*	cmd;

    // do player reborns if needed
    for (i=0 ; i<MAXPLAYERS ; i++) 
	if (playeringame[i] && players[i].playerstate == PST_REBORN) 
	    G_DoReborn (i);
    
    // do things to change the game state
    while (gameaction != ga_nothing) 
    { 
	switch (gameaction) 
	{ 
	  case ga_loadlevel: 
	    G_DoLoadLevel (); 
	    break; 
	  case ga_newgame: 
	    G_DoNewGame (); 
	    break; 
	  case ga_loadgame: 
	    G_DoLoadGame (); 
	    break; 
	  case ga_savegame: 
	    G_DoSaveGame (); 
	    break; 
	  case ga_playdemo: 
	    G_DoPlayDemo (); 
	    break; 
	  case ga_completed: 
	    G_DoCompleted (); 
	    break; 
	  case ga_victory: 
	    F_StartFinale (); 
	    break; 
	  case ga_worlddone: 
	    G_DoWorldDone (); 
	    break; 
	  case ga_screenshot: 
	    V_ScreenShot("DOOM%02i.pcx"); 
            players[consoleplayer].message = DEH_String("screen shot");
	    gameaction = ga_nothing; 
	    break; 
	  case ga_nothing: 
	    break; 
	} 
    }
    
    // get commands, check consistancy,
    // and build new consistancy check
    buf = (gametic/ticdup)%BACKUPTICS; 
 
    for (i=0 ; i<MAXPLAYERS ; i++)
    {
	if (playeringame[i]) 
	{ 
	    cmd = &players[i].cmd; 
 
	    memcpy (cmd, &netcmds[i][buf], sizeof(ticcmd_t)); 
 
	    if (demoplayback)
		G_ReadDemoTiccmd (cmd); 
	    if (demorecording)
		G_WriteDemoTiccmd (cmd);
	    
	    // check for turbo cheats

            // check ~ 4 seconds whether to display the turbo message. 
            // store if the turbo threshold was exceeded in any tics
            // over the past 4 seconds.  offset the checking period
            // for each player so messages are not displayed at the
            // same time.

            if (cmd->forwardmove > TURBOTHRESHOLD)
            {
                turbodetected[i] = true;
            }

	    if ((gametic & 31) == 0 
             && ((gametic >> 5) % MAXPLAYERS) == i
             && turbodetected[i])
	    {
		static char turbomessage[80];
		extern char *player_names[4];
		sprintf (turbomessage, "%s is turbo!",player_names[i]);
		players[consoleplayer].message = turbomessage;
                turbodetected[i] = false;
	    }
			
	    if (netgame && !netdemo && !(gametic%ticdup) ) 
	    { 
		if (gametic > BACKUPTICS 
		    && consistancy[i][buf] != cmd->consistancy) 
		{ 
		    I_Error ("consistency failure (%i should be %i)",
			     cmd->consistancy, consistancy[i][buf]); 
		} 
		if (players[i].mo) 
		    consistancy[i][buf] = players[i].mo->x; 
		else 
		    consistancy[i][buf] = rndindex; 
	    } 
	}
    }
    
    // check for special buttons
    for (i=0 ; i<MAXPLAYERS ; i++)
    {
	if (playeringame[i]) 
	{ 
	    if (players[i].cmd.buttons & BT_SPECIAL) 
	    { 
		switch (players[i].cmd.buttons & BT_SPECIALMASK) 
		{ 
		  case BTS_PAUSE: 
		    paused ^= 1; 
		    if (paused) 
			S_PauseSound (); 
		    else 
			S_ResumeSound (); 
		    break; 
					 
		  case BTS_SAVEGAME: 
		    if (!savedescription[0]) 
			strcpy (savedescription, "NET GAME"); 
		    savegameslot =  
			(players[i].cmd.buttons & BTS_SAVEMASK)>>BTS_SAVESHIFT; 
		    gameaction = ga_savegame; 
		    break; 
		} 
	    } 
	}
    }

    // Have we just finished displaying an intermission screen?
    // haleyjd 08/23/10: [STRIFE] No intermission.
    /*
    if (oldgamestate == GS_INTERMISSION && gamestate != GS_INTERMISSION)
    {
        WI_End();
    }
    */

    oldgamestate = gamestate;

    // do main actions
    switch (gamestate) 
    { 
    case GS_LEVEL: 
        P_Ticker (); 
        ST_Ticker (); 
        AM_Ticker (); 
        HU_Ticker ();
        break; 

        // haleyjd 08/23/10: [STRIFE] No intermission.
        /*
    case GS_INTERMISSION: 
        WI_Ticker (); 
        break; 
        */
    case GS_UNKNOWN: // STRIFE-TODO: What is this? is it ever used??
        F_WaitTicker();
        break;

    case GS_FINALE: 
        F_Ticker (); 
        break; 

    case GS_DEMOSCREEN: 
        D_PageTicker (); 
        break;
    }        
} 
 
 
//
// PLAYER STRUCTURE FUNCTIONS
// also see P_SpawnPlayer in P_Things
//

//
// G_InitPlayer 
// Called at the start.
// Called by the game initialization functions.
//
void G_InitPlayer (int player) 
{ 
    player_t*	p; 
 
    // set up the saved info         
    p = &players[player]; 
	 
    // clear everything else to defaults 
    G_PlayerReborn (player); 
	 
} 
 
 

//
// G_PlayerFinishLevel
// Can when a player completes a level.
//
void G_PlayerFinishLevel (int player) 
{ 
    player_t*	p; 
	 
    p = &players[player]; 
	 
    memset (p->powers, 0, sizeof (p->powers)); 
    memset (p->cards, 0, sizeof (p->cards)); 
    p->mo->flags &= ~MF_SHADOW;		// cancel invisibility 
    p->extralight = 0;			// cancel gun flashes 
    p->fixedcolormap = 0;		// cancel ir gogles 
    p->damagecount = 0;			// no palette changes 
    p->bonuscount = 0; 
} 
 

//
// G_PlayerReborn
// Called after a player dies 
// almost everything is cleared and initialized 
//
void G_PlayerReborn (int player) 
{ 
    player_t*   p; 
    int         i; 
    int         frags[MAXPLAYERS]; 
    int         killcount;
    int         allegiance;
	 
    killcount = players[player].killcount;
    allegiance = players[player].allegiance;

    memcpy(frags,players[player].frags,sizeof(frags));
	 
    p = &players[player]; 
    memset (p, 0, sizeof(*p)); 

    memcpy(p->frags, frags, sizeof(p->frags));

    p->usedown              = true;                 // don't do anything immediately
    p->attackdown           = true;
    p->inventorydown        = true;                 // villsa [STRIFE]
    p->playerstate          = PST_LIVE;       
    p->health               = deh_initial_health;   // Use dehacked value
    p->readyweapon          = wp_fist;              // villsa [STRIFE] default to fists
    p->pendingweapon        = wp_fist;              // villsa [STRIFE] default to fists
    p->weaponowned[wp_fist] = true;                 // villsa [STRIFE] default to fists
    p->cheats               |= CF_AUTOHEALTH;       // villsa [STRIFE]
    p->killcount            = killcount;
    p->allegiance           = allegiance;           // villsa [STRIFE]
    p->centerview           = true;                 // villsa [STRIFE]
	 
    for(i = 0; i < NUMAMMO; i++) 
	p->maxammo[i] = maxammo[i]; 

    for(i = 0; i < 32; i++)
        p->inventory[i].type = NUMMOBJTYPES;

    // villsa [STRIFE]
    strncpy(mission_objective, "Find help", OBJECTIVE_LEN);
}

//
// G_CheckSpot  
// Returns false if the player cannot be respawned
// at the given mapthing_t spot  
// because something is occupying it 
//
void P_SpawnPlayer (mapthing_t* mthing); 
 
boolean
G_CheckSpot
( int		playernum,
  mapthing_t*	mthing ) 
{ 
    fixed_t		x;
    fixed_t		y; 
    subsector_t*	ss; 
    unsigned		an; 
    mobj_t*		mo; 
    int			i;
	
    if (!players[playernum].mo)
    {
	// first spawn of level, before corpses
	for (i=0 ; i<playernum ; i++)
	    if (players[i].mo->x == mthing->x << FRACBITS
		&& players[i].mo->y == mthing->y << FRACBITS)
		return false;	
	return true;
    }
		
    x = mthing->x << FRACBITS; 
    y = mthing->y << FRACBITS; 
	 
    if (!P_CheckPosition (players[playernum].mo, x, y) ) 
	return false; 
 
    // flush an old corpse if needed 
    if (bodyqueslot >= BODYQUESIZE) 
	P_RemoveMobj (bodyque[bodyqueslot%BODYQUESIZE]); 
    bodyque[bodyqueslot%BODYQUESIZE] = players[playernum].mo; 
    bodyqueslot++; 
	
    // spawn a teleport fog 
    ss = R_PointInSubsector (x,y); 
    an = ( ANG45 * (((unsigned int) mthing->angle)/45) ) >> ANGLETOFINESHIFT; 
 
    mo = P_SpawnMobj (x+20*finecosine[an], y+20*finesine[an] 
		      , ss->sector->floorheight 
		      , MT_TFOG); 
	 
    if (players[consoleplayer].viewz != 1) 
	S_StartSound (mo, sfx_telept);	// don't start sound on first frame 
 
    return true; 
} 


//
// G_DeathMatchSpawnPlayer 
// Spawns a player at one of the random death match spots 
// called at level load and each death 
//
void G_DeathMatchSpawnPlayer (int playernum) 
{ 
    int             i,j; 
    int				selections; 
	 
    selections = deathmatch_p - deathmatchstarts; 
    if (selections < 4) 
	I_Error ("Only %i deathmatch spots, 4 required", selections); 
 
    for (j=0 ; j<20 ; j++) 
    { 
	i = P_Random() % selections; 
	if (G_CheckSpot (playernum, &deathmatchstarts[i]) ) 
	{ 
	    deathmatchstarts[i].type = playernum+1; 
	    P_SpawnPlayer (&deathmatchstarts[i]); 
	    return; 
	} 
    } 
 
    // no good spot, so the player will probably get stuck 
    P_SpawnPlayer (&playerstarts[playernum]); 
} 

//
// G_DoReborn 
// 
void G_DoReborn (int playernum) 
{ 
    int                             i; 
	 
    if (!netgame)
    {
	// reload the level from scratch
	gameaction = ga_loadlevel;  
    }
    else 
    {
	// respawn at the start

	// first dissasociate the corpse 
	players[playernum].mo->player = NULL;   
		 
	// spawn at random spot if in death match 
	if (deathmatch) 
	{ 
	    G_DeathMatchSpawnPlayer (playernum); 
	    return; 
	} 
		 
	if (G_CheckSpot (playernum, &playerstarts[playernum]) ) 
	{ 
	    P_SpawnPlayer (&playerstarts[playernum]); 
	    return; 
	}
	
	// try to spawn at one of the other players spots 
	for (i=0 ; i<MAXPLAYERS ; i++)
	{
	    if (G_CheckSpot (playernum, &playerstarts[i]) ) 
	    { 
		playerstarts[i].type = playernum+1;	// fake as other player 
		P_SpawnPlayer (&playerstarts[i]); 
		playerstarts[i].type = i+1;		// restore 
		return; 
	    }	    
	    // he's going to be inside something.  Too bad.
	}
	P_SpawnPlayer (&playerstarts[playernum]); 
    } 
} 
 
 
void G_ScreenShot (void) 
{ 
    gameaction = ga_screenshot; 
} 

// haleyjd 08/23/2010: [STRIFE] Removed par times.

//
// G_DoCompleted 
//
//boolean         secretexit; 
extern char*	pagename; 

//
// G_RiftExitLevel
//
// haleyjd 08/24/10: [STRIFE] New function
// * Called from some exit linedefs to exit to a specific riftspot in the 
//   given destination map.
//
void G_RiftExitLevel(int map, int spot, angle_t angle)
{
    gameaction = ga_completed;
    
    // special handling for post-Sigil map changes
    if(players[0].weaponowned[wp_sigil])
    {
        if(map == 3) // Front Base -> Abandoned Front Base
            map = 30;
        if(map == 7) // Castle -> New Front Base
            map = 10;
    }

    // no rifting in deathmatch games
    if(deathmatch)
        spot = 0;

    riftangle = angle;
    riftdest  = spot;
    destmap   = map;
}

//
// G_ExitLevel
//
// haleyjd 08/24/10: [STRIFE]:
// * Default to next map in numeric order; init destmap and riftdest.
//
void G_ExitLevel (int dest) 
{
    if(dest == 0)
        dest = gamemap + 1;
    destmap = dest;
    riftdest = 0;
    gameaction = ga_completed; 
} 

/*
// haleyjd 08/23/2010: [STRIFE] No secret exits in Strife.
// Here's for the german edition.
void G_SecretExitLevel (void) 
{
    // IF NO WOLF3D LEVELS, NO SECRET EXIT!
    if ( (gamemode == commercial)
        && (W_CheckNumForName("map31")<0))
        secretexit = false;
    else
        secretexit = true; 
    gameaction = ga_completed; 
}
*/

//
// G_DoCompleted
//
// haleyjd 08/23/10: [STRIFE]:
// * Removed G_PlayerFinishLevel call for now... STRIFE-TODO
// * Removed Chex, as not relevant to Strife.
// * Removed DOOM level transfer logic 
// * Removed intermission code.
// * Added setting gameaction to ga_worlddone.
//
void G_DoCompleted (void) 
{
    // STRIFE-TODO: save automap powerup state (possibly inlined from G_PlayerFinishLevel);
    // set stonecold to 0

    if (automapactive) 
        AM_Stop (); 

    // STRIFE-TODO: needs call to G_DoSaveGame for hubs
    // if(!deathmatch)
    //     G_DoSaveGame(savepath2);
    
    gameaction = ga_worlddone;
} 


// haleyjd 08/24/10: [STRIFE] No secret exits.
/*
//
// G_WorldDone 
//
void G_WorldDone (void) 
{ 
    gameaction = ga_worlddone; 

    if (secretexit) 
        players[consoleplayer].didsecret = true; 

    if ( gamemode == commercial )
    {
	switch (gamemap)
	{
	  case 15:
	  case 31:
	    if (!secretexit)
		break;
	  case 6:
	  case 11:
	  case 20:
	  case 30:
	    F_StartFinale ();
	    break;
	}
    }
} 
*/

//
// G_RiftPlayer
//
// haleyjd 08/24/10: [STRIFE] New function
// Teleports the player to the appropriate rift spot.
//
void G_RiftPlayer(void)
{
    if(riftdest)
    {
        P_TeleportMove(players[0].mo, 
                       riftSpots[riftdest - 1].x << FRACBITS, 
                       riftSpots[riftdest - 1].y << FRACBITS);
        players[0].mo->angle  = riftangle;
        players[0].mo->health = players[0].health;
    }
}

//
// G_RiftCheat
//
// haleyjd 08/24/10: [STRIFE] New function
// Called from the cheat code to jump to a rift spot.
//
boolean G_RiftCheat(int riftSpotNum)
{
    return P_TeleportMove(players[0].mo,
                          riftSpots[riftSpotNum - 1].x << FRACBITS,
                          riftSpots[riftSpotNum - 1].y << FRACBITS);
}

//
// G_DoWorldDone
//
// haleyjd 08/24/10: [STRIFE] Added destmap -> gamemap set.
// STRIFE-TODO: Load hub save and other changes.
//
void G_DoWorldDone (void) 
{        
    gamestate = GS_LEVEL; 
    gamemap = destmap;
    
    // STRIFE-TODO: hubs bullshit
    
    G_DoLoadLevel (); 

    if(!deathmatch)
    {
        // STRIFE-TODO: powerup transfers etc

        G_RiftPlayer();

        // STRIFE-TODO:
        // G_DoSaveGame(...);
        // M_SaveMisObj();
    }

    gameaction = ga_nothing; 
    viewactive = true; 
} 



//
// G_InitFromSavegame
// Can be called by the startup code or the menu task. 
//
extern boolean setsizeneeded;
void R_ExecuteSetViewSize (void);

char	savename[256];

void G_LoadGame (char* name) 
{ 
    strcpy (savename, name); 
    gameaction = ga_loadgame; 
} 
 
#define VERSIONSIZE		16 


void G_DoLoadGame (void) 
{ 
    int savedleveltime;
	 
    gameaction = ga_nothing; 
	 
    save_stream = fopen(savename, "rb");

    if (save_stream == NULL)
    {
        return;
    }

    savegame_error = false;

    if (!P_ReadSaveGameHeader())
    {
        fclose(save_stream);
        return;
    }

    savedleveltime = leveltime;
    
    // load a base level 
    G_InitNew (gameskill, gameepisode, gamemap); 
 
    leveltime = savedleveltime;

    // dearchive all the modifications
    P_UnArchivePlayers (); 
    P_UnArchiveWorld (); 
    P_UnArchiveThinkers (); 
    P_UnArchiveSpecials (); 
 
    if (!P_ReadSaveGameEOF())
	I_Error ("Bad savegame");

    fclose(save_stream);
    
    if (setsizeneeded)
	R_ExecuteSetViewSize ();
    
    // draw the pattern into the back screen
    R_FillBackScreen ();   
} 
 

//
// G_SaveGame
// Called by the menu task.
// Description is a 24 byte text string 
//
void
G_SaveGame
( int	slot,
  char*	description ) 
{ 
    savegameslot = slot; 
    strcpy (savedescription, description); 
    sendsave = true; 
} 
 
void G_DoSaveGame (void) 
{ 
    char *savegame_file;
    char *temp_savegame_file;

    temp_savegame_file = P_TempSaveGameFile();
    savegame_file = P_SaveGameFile(savegameslot);

    // Open the savegame file for writing.  We write to a temporary file
    // and then rename it at the end if it was successfully written.
    // This prevents an existing savegame from being overwritten by 
    // a corrupted one, or if a savegame buffer overrun occurs.

    save_stream = fopen(temp_savegame_file, "wb");

    if (save_stream == NULL)
    {
        return;
    }

    savegame_error = false;

    P_WriteSaveGameHeader(savedescription);
 
    P_ArchivePlayers (); 
    P_ArchiveWorld (); 
    P_ArchiveThinkers (); 
    P_ArchiveSpecials (); 
	 
    P_WriteSaveGameEOF();
	 
    // Enforce the same savegame size limit as in Vanilla Doom, 
    // except if the vanilla_savegame_limit setting is turned off.

    if (vanilla_savegame_limit && ftell(save_stream) > SAVEGAMESIZE)
    {
        I_Error ("Savegame buffer overrun");
    }
    
    // Finish up, close the savegame file.

    fclose(save_stream);

    // Now rename the temporary savegame file to the actual savegame
    // file, overwriting the old savegame if there was one there.

    remove(savegame_file);
    rename(temp_savegame_file, savegame_file);
    
    gameaction = ga_nothing; 
    strcpy(savedescription, "");

    players[consoleplayer].message = DEH_String(GGSAVED);

    // draw the pattern into the back screen
    R_FillBackScreen ();	
} 
 

//
// G_InitNew
// Can be called by the startup code or the menu task,
// consoleplayer, displayplayer, playeringame[] should be set. 
//
skill_t	d_skill; 
int     d_episode; 
int     d_map; 
 
void
G_DeferedInitNew
( skill_t	skill,
  int		episode,
  int		map) 
{ 
    d_skill = skill; 
    d_episode = episode; 
    d_map = map; 
    gameaction = ga_newgame; 
} 


void G_DoNewGame (void) 
{
    demoplayback = false; 
    netdemo = false;
    netgame = false;
    deathmatch = false;
    playeringame[1] = playeringame[2] = playeringame[3] = 0;
    respawnparm = false;
    fastparm = false;
    nomonsters = false;
    consoleplayer = 0;
    G_InitNew (d_skill, d_episode, d_map); 
    gameaction = ga_nothing; 
} 

// The sky texture to be used instead of the F_SKY1 dummy.
extern  int	skytexture; 

//
// G_InitNew
//
// haleyjd 08/24/10: [STRIFE]:
// * Added riftdest initialization
//
void
G_InitNew
( skill_t	skill,
  int		episode,
  int		map ) 
{ 
    char *skytexturename;
    int             i; 
	 
    if (paused) 
    { 
	paused = false; 
	S_ResumeSound (); 
    } 
	

    if (skill > sk_nightmare) 
	skill = sk_nightmare;


    // This was quite messy with SPECIAL and commented parts.
    // Supposedly hacks to make the latest edition work.
    // It might not work properly.
    if (episode < 1)
      episode = 1; 

    if ( gamemode == retail )
    {
      if (episode > 4)
	episode = 4;
    }
    else if ( gamemode == shareware )
    {
      if (episode > 1) 
	   episode = 1;	// only start episode 1 on shareware
    }  
    else
    {
      if (episode > 3)
	episode = 3;
    }
    

  
    if (map < 1) 
	map = 1;
    
    if ( (map > 9)
	 && ( gamemode != commercial) )
      map = 9; 
		 
    M_ClearRandom (); 
	 
    if (skill == sk_nightmare || respawnparm )
	respawnmonsters = true;
    else
	respawnmonsters = false;

    // STRIFE-TODO: (broken) Strife skill level mobjinfo/states tweaking
    /*if (fastparm || (skill == sk_nightmare && gameskill != sk_nightmare) )
    { 
	for (i=S_SARG_RUN1 ; i<=S_SARG_PAIN2 ; i++) 
	    states[i].tics >>= 1; 
	mobjinfo[MT_BRUISERSHOT].speed = 20*FRACUNIT; 
	mobjinfo[MT_HEADSHOT].speed = 20*FRACUNIT; 
	mobjinfo[MT_TROOPSHOT].speed = 20*FRACUNIT; 
    } 
    else if (skill != sk_nightmare && gameskill == sk_nightmare) 
    { 
	for (i=S_SARG_RUN1 ; i<=S_SARG_PAIN2 ; i++) 
	    states[i].tics <<= 1; 
	mobjinfo[MT_BRUISERSHOT].speed = 15*FRACUNIT; 
	mobjinfo[MT_HEADSHOT].speed = 10*FRACUNIT; 
	mobjinfo[MT_TROOPSHOT].speed = 10*FRACUNIT; 
    } */
	 
			 
    // force players to be initialized upon first level load         
    for (i=0 ; i<MAXPLAYERS ; i++) 
	players[i].playerstate = PST_REBORN; 
 
    usergame = true;                // will be set false if a demo 
    paused = false; 
    demoplayback = false; 
    automapactive = false; 
    viewactive = true; 
    gameepisode = episode; 
    gamemap = map; 
    gameskill = skill; 
    riftdest = 0; // haleyjd 08/24/10: [STRIFE] init riftdest to zero on new game
 
    viewactive = true;

    // Set the sky to use.
    //
    // Note: This IS broken, but it is how Vanilla Doom behaves.  
    // See http://doom.wikia.com/wiki/Sky_never_changes_in_Doom_II.
    //
    // Because we set the sky here at the start of a game, not at the
    // start of a level, the sky texture never changes unless we
    // restore from a saved game.  This was fixed before the Doom
    // source release, but this IS the way Vanilla DOS Doom behaves.

    // STRIFE-TODO: Strife skies (of which there are but two)
    // villsa [STRIFE] setting all skies to SKY03 as a placeholder
    if (gamemode == commercial)
    {
        if (gamemap < 12)
            skytexturename = "SKY03";
        else if (gamemap < 21)
            skytexturename = "SKY03";
        else
            skytexturename = "SKY03";
    }
    else
    {
        switch (gameepisode) 
        { 
          default:
          case 1: 
            skytexturename = "SKY03"; 
            break; 
          case 2: 
            skytexturename = "SKY03"; 
            break; 
          case 3: 
            skytexturename = "SKY03"; 
            break; 
          case 4:        // Special Edition sky
            skytexturename = "SKY03";
            break;
        } 
    }

    skytexturename = DEH_String(skytexturename);

    skytexture = R_TextureNumForName(skytexturename);

    // STRIFE-TODO:
    // G_LoadPath(gamemap)
    G_DoLoadLevel (); 
} 
 

//
// DEMO RECORDING 
// 
#define DEMOMARKER		0x80


void G_ReadDemoTiccmd (ticcmd_t* cmd) 
{ 
    if (*demo_p == DEMOMARKER) 
    {
	// end of demo data stream 
	G_CheckDemoStatus (); 
	return; 
    } 
    cmd->forwardmove = ((signed char)*demo_p++); 
    cmd->sidemove = ((signed char)*demo_p++); 

    // If this is a longtics demo, read back in higher resolution

    if (longtics)
    {
        cmd->angleturn = *demo_p++;
        cmd->angleturn |= (*demo_p++) << 8;
    }
    else
    {
        cmd->angleturn = ((unsigned char) *demo_p++)<<8; 
    }

    cmd->buttons = (unsigned char)*demo_p++; 
} 

// Increase the size of the demo buffer to allow unlimited demos

static void IncreaseDemoBuffer(void)
{
    int current_length;
    byte *new_demobuffer;
    byte *new_demop;
    int new_length;

    // Find the current size

    current_length = demoend - demobuffer;
    
    // Generate a new buffer twice the size
    new_length = current_length * 2;
    
    new_demobuffer = Z_Malloc(new_length, PU_STATIC, 0);
    new_demop = new_demobuffer + (demo_p - demobuffer);

    // Copy over the old data

    memcpy(new_demobuffer, demobuffer, current_length);

    // Free the old buffer and point the demo pointers at the new buffer.

    Z_Free(demobuffer);

    demobuffer = new_demobuffer;
    demo_p = new_demop;
    demoend = demobuffer + new_length;
}

void G_WriteDemoTiccmd (ticcmd_t* cmd) 
{ 
    byte *demo_start;

    if (gamekeydown[key_demo_quit])           // press q to end demo recording 
	G_CheckDemoStatus (); 

    demo_start = demo_p;

    *demo_p++ = cmd->forwardmove; 
    *demo_p++ = cmd->sidemove; 

    // If this is a longtics demo, record in higher resolution
 
    if (longtics)
    {
        *demo_p++ = (cmd->angleturn & 0xff);
        *demo_p++ = (cmd->angleturn >> 8) & 0xff;
    }
    else
    {
        *demo_p++ = cmd->angleturn >> 8; 
    }

    *demo_p++ = cmd->buttons; 

    // reset demo pointer back
    demo_p = demo_start;

    if (demo_p > demoend - 16)
    {
        if (vanilla_demo_limit)
        {
            // no more space 
            G_CheckDemoStatus (); 
            return; 
        }
        else
        {
            // Vanilla demo limit disabled: unlimited
            // demo lengths!

            IncreaseDemoBuffer();
        }
    } 
	
    G_ReadDemoTiccmd (cmd);         // make SURE it is exactly the same 
} 
 
 
 
//
// G_RecordDemo 
// 
void G_RecordDemo (char* name) 
{ 
    int             i; 
    int				maxsize;
	
    usergame = false; 
    strcpy (demoname, name); 
    strcat (demoname, ".lmp"); 
    maxsize = 0x20000;

    //!
    // @arg <size>
    // @category demo
    // @vanilla
    //
    // Specify the demo buffer size (KiB)
    //

    i = M_CheckParm ("-maxdemo");
    if (i && i<myargc-1)
	maxsize = atoi(myargv[i+1])*1024;
    demobuffer = Z_Malloc (maxsize,PU_STATIC,NULL); 
    demoend = demobuffer + maxsize;
	
    demorecording = true; 
} 
 
 
void G_BeginRecording (void) 
{ 
    int             i; 

    //!
    // @category demo
    //
    // Record a high resolution "Doom 1.91" demo.
    //

    longtics = M_CheckParm("-longtics") != 0;

    // If not recording a longtics demo, record in low res

    lowres_turn = !longtics;
    
    demo_p = demobuffer;
	
    // Save the right version code for this demo
 
    if (longtics)
    {
        *demo_p++ = DOOM_191_VERSION;
    }
    else
    {
        *demo_p++ = DOOM_VERSION;
    }

    *demo_p++ = gameskill; 
    *demo_p++ = gameepisode; 
    *demo_p++ = gamemap; 
    *demo_p++ = deathmatch; 
    *demo_p++ = respawnparm;
    *demo_p++ = fastparm;
    *demo_p++ = nomonsters;
    *demo_p++ = consoleplayer;
	 
    for (i=0 ; i<MAXPLAYERS ; i++) 
	*demo_p++ = playeringame[i]; 		 
} 
 

//
// G_PlayDemo 
//

char*	defdemoname; 
 
void G_DeferedPlayDemo (char* name) 
{ 
    defdemoname = name; 
    gameaction = ga_playdemo; 
} 

// Generate a string describing a demo version

static char *DemoVersionDescription(int version)
{
    static char resultbuf[16];

    switch (version)
    {
        case 104:
            return "v1.4";
        case 105:
            return "v1.5";
        case 106:
            return "v1.6/v1.666";
        case 107:
            return "v1.7/v1.7a";
        case 108:
            return "v1.8";
        case 109:
            return "v1.9";
        default:
            break;
    }

    // Unknown version.  Perhaps this is a pre-v1.4 IWAD?  If the version
    // byte is in the range 0-4 then it can be a v1.0-v1.2 demo.

    if (version >= 0 && version <= 4)
    {
        return "v1.0/v1.1/v1.2";
    }
    else
    {
        sprintf(resultbuf, "%i.%i (unknown)", version / 100, version % 100);
        return resultbuf;
    }
}

void G_DoPlayDemo (void) 
{ 
    skill_t skill; 
    int             i, episode, map; 
    int demoversion;
	 
    gameaction = ga_nothing; 
    demobuffer = demo_p = W_CacheLumpName (defdemoname, PU_STATIC); 

    demoversion = *demo_p++;

    if (demoversion == DOOM_VERSION)
    {
        longtics = false;
    }
    else if (demoversion == DOOM_191_VERSION)
    {
        // demo recorded with cph's modified "v1.91" doom exe
        longtics = true;
    }
    else
    {
        char *message = "Demo is from a different game version!\n"
                        "(read %i, should be %i)\n"
                        "\n"
                        "*** You may need to upgrade your version "
                            "of Doom to v1.9. ***\n"
                        "    See: http://doomworld.com/files/patches.shtml\n"
                        "    This appears to be %s.";

        I_Error(message, demoversion, DOOM_VERSION,
                         DemoVersionDescription(demoversion));
    }
    
    skill = *demo_p++; 
    episode = *demo_p++; 
    map = *demo_p++; 
    deathmatch = *demo_p++;
    respawnparm = *demo_p++;
    fastparm = *demo_p++;
    nomonsters = *demo_p++;
    consoleplayer = *demo_p++;
	
    for (i=0 ; i<MAXPLAYERS ; i++) 
	playeringame[i] = *demo_p++; 

    //!
    // @category demo
    // 
    // Play back a demo recorded in a netgame with a single player.
    //

    if (playeringame[1] || M_CheckParm("-netdemo") > 0) 
    { 
	netgame = true; 
	netdemo = true; 
    }

    // don't spend a lot of time in loadlevel 
    precache = false;
    G_InitNew (skill, episode, map); 
    precache = true; 
    starttime = I_GetTime (); 

    usergame = false; 
    demoplayback = true; 
} 

//
// G_TimeDemo 
//
void G_TimeDemo (char* name) 
{
    //!
    // @vanilla 
    //
    // Disable rendering the screen entirely.
    //

    nodrawers = M_CheckParm ("-nodraw"); 

    timingdemo = true; 
    singletics = true; 

    defdemoname = name; 
    gameaction = ga_playdemo; 
} 
 
 
/* 
=================== 
= 
= G_CheckDemoStatus 
= 
= Called after a death or level completion to allow demos to be cleaned up 
= Returns true if a new demo loop action will take place 
=================== 
*/ 
 
boolean G_CheckDemoStatus (void) 
{ 
    int             endtime; 
	 
    if (timingdemo) 
    { 
        float fps;
        int realtics;

	endtime = I_GetTime (); 
        realtics = endtime - starttime;
        fps = ((float) gametic * TICRATE) / realtics;

        // Prevent recursive calls
        timingdemo = false;
        demoplayback = false;

	I_Error ("timed %i gametics in %i realtics (%f fps)",
                 gametic, realtics, fps);
    } 
	 
    if (demoplayback) 
    { 
        W_ReleaseLumpName(defdemoname);
	demoplayback = false; 
	netdemo = false;
	netgame = false;
	deathmatch = false;
	playeringame[1] = playeringame[2] = playeringame[3] = 0;
	respawnparm = false;
	fastparm = false;
	nomonsters = false;
	consoleplayer = 0;
        
        if (singledemo) 
            I_Quit (); 
        else 
            D_AdvanceDemo (); 

	return true; 
    } 
 
    if (demorecording) 
    { 
	*demo_p++ = DEMOMARKER; 
	M_WriteFile (demoname, demobuffer, demo_p - demobuffer); 
	Z_Free (demobuffer); 
	demorecording = false; 
	I_Error ("Demo %s recorded",demoname); 
    } 
	 
    return false; 
}