lin_time.cpp

Go to the documentation of this file.

/*
 * Vega Strike
 * Copyright (C) 2001-2002 Daniel Horn
 *
 * http://vegastrike.sourceforge.net/
 *
 * 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.
 */

#include "vegastrike.h"
#include "in_kb.h"
#include "vs_random.h"
static double firsttime;
VSRandom vsrandom( time( NULL ) );

#ifdef WIN32
#ifndef NOMINMAX
#define NOMINMAX
#endif //tells VCC not to generate min/max macros
#include <windows.h>
static LONGLONG ttime;
static LONGLONG newtime = 0;
static LONGLONG freq;
static double   dblnewtime;
#else
#if defined (HAVE_SDL)
#   include <SDL/SDL.h>
#endif /* defined( HAVE_SDL ) */
static double newtime;
static double lasttime;

#include <sys/time.h>
#include <sys/types.h>
#endif
static double elapsedtime     = .1;
static double timecompression = 1;

double getNewTime()
{
#ifdef _WIN32
    return dblnewtime-firsttime;
#else
    return newtime-firsttime;
#endif
}

class NetClient;

int timecount;

void inc_time_compression( const KBData&, KBSTATE a )
{
    if (a == PRESS) {
        timecompression *= 1.5;
        timecount++;
    }
}

void dec_time_compression( const KBData&, KBSTATE a )
{
    if (a == PRESS) {
        timecompression /= 1.5;
        timecount--;
    }
}

void reset_time_compression( const KBData&, KBSTATE a )
{
    if (a == PRESS) {
        timecompression = 1;
        timecount = 0;
    }
}

void pause_key( const KBData &s, KBSTATE a )
{
    static bool paused = false;
    if (a == PRESS) {
        if (paused == false) {
            timecompression = .0000001;
            timecount = 0;
            paused = true;
        } else {
            paused = false;
            reset_time_compression( s, a );
        }
    }
}

float getTimeCompression()
{
    return timecompression;
}

void setTimeCompression( float tc )
{
    timecompression = tc;
    timecount = 0;     //to avoid any problems with time compression sounds... use getTimeCompression() instead
}

bool toggle_pause()
{
    static bool paused = false;
    if (paused)
    {
        setTimeCompression(1);
        paused = false;
    }
    else
    {
        setTimeCompression(.0000001);
    paused = true;
    }
    return paused;
}

#ifdef _WIN32

#ifndef NOMINMAX
#define NOMINMAX
#endif //tells VCC not to generate min/max macros

#include <windows.h>

void micro_sleep( unsigned int n )
{
    Sleep( n/1000 );
}

#elif defined (IRIX)

#include <unistd.h>

void micro_sleep( unsigned int n )
{
    (void) usleep( (useconds_t) n );
}

#else

void micro_sleep( unsigned int n )
{
    struct timeval tv = {
        0, 0
    };

    tv.tv_usec = n%1000000;
    tv.tv_sec  = n/1000000;
    select( 0, NULL, NULL, NULL, &tv );
}
#endif

void InitTime()
{
#ifdef WIN32
    QueryPerformanceFrequency( (LARGE_INTEGER*) &freq );
    QueryPerformanceCounter( (LARGE_INTEGER*) &ttime );

#elif defined (HAVE_GETTIMEOFDAY)
    struct timeval tv;
    (void) gettimeofday( &tv, NULL );

    newtime  = (double) tv.tv_sec+(double) tv.tv_usec*1.e-6;
    lasttime = newtime-.001;

#elif defined (HAVE_SDL)
    newtime  = SDL_GetTicks()*1.e-3;
    lasttime = newtime-.001;

#else
# error "We have no way to determine the time on this system."
#endif
    elapsedtime = .001;
}

double GetElapsedTime()
{
    return elapsedtime;
}

double queryTime()
{
#ifdef WIN32
    LONGLONG tmpnewtime;
    QueryPerformanceCounter( (LARGE_INTEGER*) &tmpnewtime );
    return ( (double) tmpnewtime )/(double) freq-firsttime;
#elif defined (HAVE_GETTIMEOFDAY)
    struct timeval tv;
    (void) gettimeofday( &tv, NULL );
    double tmpnewtime = (double) tv.tv_sec+(double) tv.tv_usec*1.e-6;
    return tmpnewtime-firsttime;
#elif defined (HAVE_SDL)
    double tmpnewtime = SDL_GetTicks()*1.e-3;
    return tmpnewtime-firsttime;
#else
# error "We have no way to determine the time on this system."
    return 0.;
#endif
}

double realTime()
{
#ifdef WIN32
    LONGLONG tmpnewtime;
    QueryPerformanceCounter( (LARGE_INTEGER*) &tmpnewtime );
    return ( (double) tmpnewtime )/(double) freq;
#elif defined (HAVE_GETTIMEOFDAY)
    struct timeval tv;
    (void) gettimeofday( &tv, NULL );
    double tmpnewtime = (double) tv.tv_sec+(double) tv.tv_usec*1.e-6;
#elif defined (HAVE_SDL)
    double tmpnewtime = SDL_GetTicks()*1.e-3;
#else
# error "We have no way to determine the time on this system."
    double tmpnewtime = 0.;
#endif

    static double reallyfirsttime = tmpnewtime;
    return tmpnewtime - reallyfirsttime;
}

void UpdateTime()
{
    static bool first=true;
#ifdef WIN32
    QueryPerformanceCounter( (LARGE_INTEGER*) &newtime );
    elapsedtime = ( (double) (newtime-ttime) )/freq;
    ttime = newtime;
    if (freq == 0)
        dblnewtime = 0.;
    else
        dblnewtime = ( (double) newtime )/( (double) freq );
    if (first)
        firsttime = dblnewtime;
#elif defined (HAVE_GETTIMEOFDAY)
    struct timeval tv;
    (void) gettimeofday( &tv, NULL );
    lasttime    = newtime;
    newtime     = (double) tv.tv_sec+(double) tv.tv_usec*1.e-6;
    elapsedtime = newtime-lasttime;
    if (first)
        firsttime = newtime;
#elif defined (HAVE_SDL)
    lasttime    = newtime;
    newtime     = SDL_GetTicks()*1.e-3;
    elapsedtime = newtime-lasttime;
    if (first)
        firsttime = newtime;
#else
# error "We have no way to determine the time on this system."
#endif
    elapsedtime *= timecompression;
    first=false;
}

void setNewTime( double newnewtime )
{
    firsttime -= newnewtime-queryTime();
    UpdateTime();
}