float PLAYER_SIZE = 10;
float CHASER_SIZE = 10;
float LIGHT_ANGLE = PI / 6;
float BEAM_LENGTH = 768;
float CHASER_SPEED = 0.4;
float CHASER_TURN_RATE = 0.03;
float CHASER_STEERING_TOLERANCE = 0.11;
float BURN_RATE = 0.004;
float PLAYER_SPEED = 0.5;


float getAngleDifference(float angle1, float angle2) {
  float difference1 = (angle1 + TWO_PI) % TWO_PI - (angle2 + TWO_PI) % TWO_PI;
  float difference2 = (angle2 - angle1);
  if (abs(difference2) > abs(difference1)) {
    return difference1;
  }
  else {
    return difference2;
  }
}