class Segment {
  
  float x1, y1, x2, y2;
  float normX, normY;
  float centerX, centerY;
  Note note;
  
  Segment(float x1, float y1, float x2, float y2) {
    setPoints(x1, y1, x2, y2);
    note = new Note(40 + int(random(80)), 127, 200);
  }
  
  void setPoints(float x1, float y1, float x2, float y2) {
    this.x1 = x1; this.y1 = y1; this.x2 = x2; this.y2 = y2;
    calculateNormal();
  }
  
  void calculateNormal() {
    normX = y2 - y1; normY = -(x2 - x1);
    float maxi = sqrt(sq(normX) + sq(normY));
    normX = norm(normX, 0, maxi); normY = norm(normY, 0, maxi);
    centerX = x1 + (x2-x1)/2;
    centerY = y1 + (y2-y1)/2;
  }
  
  void display() {
    stroke(0);
    line(x1, y1, x2, y2);
    if (DEBUG) {
      stroke(200);
      line(centerX, centerY, centerX + normX*20, centerY + normY*20);
    }
  }
  
}