class segment{
  float centerx,centery,innerradius, outerradius, startangle, endangle;
  color c;

  segment(){
    centerx=centery=innerradius=outerradius=startangle=endangle=0.0f;
  }

  segment(float cx, float cy, float ir, float or, float sa, float ea){
    centerx=cx;
    centery=cy;
    innerradius=ir;
    outerradius=or;
    startangle=sa;
    endangle=ea;
    int grayvalue=int(random(120));
    c=color(grayvalue*random(1.0,min(5.0,(grayvalue==0)?1.0:255.0/grayvalue)),grayvalue, grayvalue); 
  }

  void linedraw(){
    float p1x,p1y,p2x,p2y,p3x,p3y,p4x,p4y;
    p1x=centerx+innerradius*cos(startangle);
    p1y=centery+innerradius*sin(startangle);
    p2x=centerx+outerradius*cos(startangle);
    p2y=centery+outerradius*sin(startangle);
    p3x=centerx+innerradius*cos(endangle);
    p3y=centery+innerradius*sin(endangle);
    p4x=centerx+outerradius*cos(endangle);
    p4y=centery+outerradius*sin(endangle);
    line(p1x,p1y,p2x,p2y);
    line(p3x,p3y,p4x,p4y);
    arc(centerx, centery, innerradius, innerradius, startangle, endangle);
    arc(centerx, centery, outerradius, outerradius, startangle, endangle);
  }
  
  void polydraw(){
    fill(c);
    int steps=round(abs(endangle-startangle)/radians(5.0f));
    float da=(endangle-startangle)/steps;
    beginShape(POLYGON);
    vertex(centerx+innerradius*cos(startangle),centery+innerradius*sin(startangle));
    for (int i=0;i<steps+1;i++){
    vertex(centerx+outerradius*cos(startangle+i*da),centery+outerradius*sin(startangle+i*da));
    }
    vertex(centerx+innerradius*cos(endangle),centery+innerradius*sin(endangle));
        for (int i=0;i<steps;i++){
    vertex(centerx+innerradius*cos(endangle-i*da),centery+innerradius*sin(endangle-i*da));
    }
    endShape();
  }
  
  void rotate(float angle){
    startangle+=angle;
    endangle+=angle;
    }

}