//FIGHT! 
//This method handles battles between two wanderers who occupy the same pixel.

void battle (Wanderer c1,Wanderer c2) {
  float dice1 = random(20);
  float dice2 = random(20);
  
  c1.health -= dice2;
  c2.health -= dice1;
  
  streak(c1, dice1);
  streak(c2, dice2);
  
  if (c1.health < 0) { c1.die();};
  if (c2.health < 0) { c2.die();};
};

void streak (Wanderer source, float l) {
  if (millis() > 1000) {
    float angle = atan2(source.xv, source.yv);
    //Battles are represented as colour streaks.
    tstreak(source.x, source.y, angle, l, source.thecolor);
  };
};