vec_dist

DEBUG_VAR(scorpionPlyrDist, 100);
...
scorpionPlyrDist = vec_dist (hero.x, my.x);

action scorpion_action()
{
   my.eflags |= FAT | NARROW;

   ...

   demo_scorpion = me;
	
   my.push = 10;
	
   ...

   set(my, POLYGON);

   my.status = scorpion_unaware;

   while (my.status != scorpion_dead) 
   {
      DEBUG_VAR(scorpionPlyrDist, 100); // scorpionPlyrDist
         //    IS ALWAYS EQUALING 0, INSTEAD OF CHANGING AS 
         //    THE PLAYER MOVES CLOSER TO THE GIANT SCORPION.

      ...

      while(1) // I DO NOT KNOW WHY I NEED THIS EXTRA LOOP TO 
               //    MAKE THIS ANIMATION HAPPEN.  I DO NOT 
               //    NEED THIS EXTRA LOOP TO MAKE THIS 
               //    ANIMATION WORK FOR OTHER MODELS.
      {
         my.ANIMATION += 2*time_step;	  
         ent_animate(me,"stand",my.ANIMATION,ANM_CYCLE);
         
         wait(1);
      }

      if(scrpn_health <= 0)
      {
         my.status = scorpion_dead;
      }
	
      scorpionPlyrDist = vec_dist (hero.x, my.x); // FOR SOME
         //    REASON, scorpionPlyrDist IS ALWAYS EQUALING 0,
         //    ACCORDING TO THE DEBUG_VAR UP ABOVE, NO MATTER 
         //    HOW CLOSE THE PLAYER GETS TO THE GIANT SCORPION.
   	
      c_scan(my.x,my.pan,vector(360,0,750),SCAN_ENTS | 
         SCAN_FLAG2 | IGNORE_ME);

      if(you)
      {	
         // SCORPION DETECTING PLAYER CODE.
         ...
			
         wait (1);
      }
  
      my.tilt = 0;
	
      if(my.status == scorpion_dead)
      {
         // SCORPION DYING CODE
         ...	
      }
      
      set (my, PASSABLE); // allow the player to pass through 
                          //    the corpse now
}