int ControlsCapSampleRate (void)
{
// DEFTIME
if (gameStates.limitFPS.bControls) {
// check elapsed time since last call to ControlsReadAll
// if less than 25 ms (i.e. 40 fps) return
if (gameOpts->legacy.bMouse)
gameStates.input.kcPollTime = gameData.time.xFrame;
else {
if (gameData.app.bGamePaused)
GetSlowTicks ();
kcFrameCount++;
gameStates.input.kcPollTime += gameData.time.xFrame;
if (!gameStates.app.tick40fps.bTick)
return 1;
}
}
else
gameStates.input.kcPollTime = gameData.time.xFrame;
gameStates.input.kcFrameTime = (float) gameStates.input.kcPollTime / kcFrameCount;
#if 1
nMaxTurnRate = (int) gameStates.input.kcFrameTime;
#else
nMaxTurnRate = (int) (gameStates.input.kcFrameTime * (1.0f - X2F (gameData.pig.ship.player->maxRotThrust)));
#endif
if (CheckGameConfig ())
SDL_Delay (gameData.app.nFrameCount % 100);
return 0;
}
void CalcFrameTime (void)
{
if (gameData.app.bGamePaused) {
gameData.time.xLast = TimerGetFixedSeconds ();
gameData.time.xFrame = 0;
gameData.time.xRealFrame = 0;
return;
}
fix timerValue,
xLastFrameTime = gameData.time.xFrame;
GetSlowTicks ();
#if EXACT_FRAME_TIME
static float fSlack = 0;
int nFrameTime, nMinFrameTime, nDeltaTime;
if (MAXFPS <= 1)
nDeltaTime = 0;
else {
#ifdef RELEASE
if (!gameOpts->app.bExpertMode && (gameOpts->render.nMaxFPS > 1))
gameOpts->render.nMaxFPS = MAX_FRAMERATE;
#endif
if (!gameData.time.tLast)
nDeltaTime = 0;
else {
nFrameTime = gameStates.app.nSDLTicks - gameData.time.tLast;
nMinFrameTime = 1000 / MAXFPS;
nDeltaTime = nMinFrameTime - nFrameTime;
fSlack += 1000.0f / MAXFPS - nMinFrameTime;
if (fSlack >= 1) {
nDeltaTime += int (fSlack);
fSlack -= int (fSlack);
}
if (0 < nDeltaTime)
G3_SLEEP (nDeltaTime);
}
}
timerValue = MSEC2X (gameStates.app.nSDLTicks);
#else
fix xMinFrameTime = ((MAXFPS > 1) ? I2X (1) / MAXFPS : 1);
do {
timerValue = TimerGetFixedSeconds ();
gameData.time.xFrame = timerValue - gameData.time.xLast;
if (MAXFPS < 2)
break;
G3_SLEEP (1);
} while (gameData.time.xFrame < xMinFrameTime);
#endif
gameData.time.xFrame = timerValue - gameData.time.xLast;
gameData.time.xRealFrame = gameData.time.xFrame;
if (gameStates.app.cheats.bTurboMode)
gameData.time.xFrame *= 2;
gameData.time.xLast = timerValue;
#if EXACT_FRAME_TIME
gameData.time.tLast = gameStates.app.nSDLTicks;
if (nDeltaTime > 0)
gameData.time.tLast += nDeltaTime;
#else
gameData.time.tLast = SDL_GetTicks ();
#endif
if (gameData.time.xFrame < 0) //if bogus frametimed:\temp\dm_test.
gameData.time.xFrame = xLastFrameTime; //d:\temp\dm_test.then use time from last frame
#if Arcade_mode
gameData.time.xFrame /= 2;
#endif
#if defined (TIMER_TEST) && defined (_DEBUG)
gameData.time.xStops = gameData.time.xStarts = 0;
#endif
// Set value to determine whether homing missile can see target.
// The lower frametime is, the more likely that it can see its target.
if (gameStates.limitFPS.bHomers)
xMinTrackableDot = MIN_TRACKABLE_DOT;
else if (gameData.time.xFrame <= I2X (1)/64)
xMinTrackableDot = MIN_TRACKABLE_DOT; // -- 3* (I2X (1) - MIN_TRACKABLE_DOT)/4 + MIN_TRACKABLE_DOT;
else if (gameData.time.xFrame < I2X (1)/32)
xMinTrackableDot = MIN_TRACKABLE_DOT + I2X (1)/64 - 2*gameData.time.xFrame; // -- FixMul (I2X (1) - MIN_TRACKABLE_DOT, I2X (1)-4*gameData.time.xFrame) + MIN_TRACKABLE_DOT;
else if (gameData.time.xFrame < I2X (1)/4)
xMinTrackableDot = MIN_TRACKABLE_DOT + I2X (1)/64 - I2X (1)/16 - gameData.time.xFrame; // -- FixMul (I2X (1) - MIN_TRACKABLE_DOT, I2X (1)-4*gameData.time.xFrame) + MIN_TRACKABLE_DOT;
else
xMinTrackableDot = MIN_TRACKABLE_DOT + I2X (1)/64 - I2X (1)/8;
}