control.cpp

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/* control.cpp game control */

/* parameters for the 'graphical' (such as it is) display */
int slowness;           // slowness number
int paused = 0;         // == 1 iff paused
int idelay = 10;        // delay increment
int tdelay;         // total delay yet to do


int userKeyPress(int c)
{
  switch (c) {
  case '+': slowness -= min(slowness, 100); break;
  case '-': slowness += 100; break;
  case 'f': slowness = 0; break;
  case 's': /* for you todo: highlight a worm */ break;
  case 'k': /* for you todo: kill the highlighted worm */ break;
  case 'w': createWorm((WORM_KIND)random(3), say[random(Nsay)]); break;
  case ' ': paused ^= 1; break;
  }
  return c;
}

/* User can control the speed, etc.  The total delay required, tdelay,
   is doled out in increments of idelay so that keyboard interaction
   is more responsive.  pre: none; post: returns ESC or '\0';; */

int userControl()
{
  sprintf
    (msg, 
     "SPC %s, ESC terminates, k kills-, w creates-, s shows-a-worm" EOLN
     "%2d Vegetarians,%2d Cannibals,%2d Scissor-heads,%2d hi-water-mark" EOLN
     "%04d slowness, - increases, + reduces, f full-speed" EOLN,
     (paused? "resumes" : "pauses "), 
     nVegetarians, nCannibals, nScissors, hxWorms, slowness);
  showMsg(asogRows + 1);
  for (tdelay = slowness+1; tdelay > 0; tdelay -= idelay) {
    char c = userKeyPress(getChar()); // no-delay
    if (c == ESC) return ESC;
    if (paused) tdelay += idelay;
    if (idelay > 0)
      usleep(1000 * idelay);
  }
  return '\0';
}