struct StickFigure {
  pair center;
  real height;
  real headHeightRatio;
  real neckHeightRatio;
  real torsoHeightRatio;
  real shoulderHeightRatio;
  real armTorsoRatio;
  real armAngle;
  pen outline;
  pen fill;
  
  void operator init(pair standsOn=(0,0), real height=10mm) {
    this.center = standsOn+(0,height/2);
    this.height = height;
    this.headHeightRatio = 0.2;
    this.neckHeightRatio = 0.1;
    this.torsoHeightRatio = 0.28;
    this.shoulderHeightRatio = 0.1;
    this.armTorsoRatio = 1.2;
    this.armAngle = -70;
    this.outline = currentpen;
    this.fill = currentpen;
  }

  pair crownPos() {
    return this.center + (0,this.height/2);
  }
  
  pair chinPos() {
    return this.crownPos() - (0,this.height*this.headHeightRatio);
  }
  
  pair headPos() {
    return (this.crownPos() + this.chinPos())/2;
  }
  
  pair neckBasePos() {
    return this.chinPos() - (0,this.height*this.neckHeightRatio);
  }

  pair shoulderPos(bool rightSide=true) {
    real sign = 1;
    if (rightSide == false)
      sign = -1;
    return this.neckBasePos() + (sign*this.height*this.shoulderHeightRatio/2,0);
  }
  
  pair handPos(bool rightSide=true) {
    pair dArm = this.height*this.torsoHeightRatio*this.armTorsoRatio * dir(armAngle);
    if (rightSide == false)
      dArm = (-dArm.x, dArm.y);
    return this.shoulderPos(rightSide=rightSide) + dArm;
  }

  pair tailPos() {
    return this.neckBasePos() - (0,this.height*this.torsoHeightRatio);
  }    
  
  pair footPos(bool rightSide=true) {
    real legHeightRatio = 1.0 - this.headHeightRatio - this.neckHeightRatio - torsoHeightRatio;
    pair dLeg = (this.height*this.shoulderHeightRatio/2, -this.height*legHeightRatio);
    if (rightSide == false)
      dLeg = (-dLeg.x, dLeg.y);
    return this.tailPos() + dLeg;
  }

  void draw(picture pic=currentpicture) {
    path head =
      shift(this.headPos())
      *scale(this.height*this.headHeightRatio/2)
      *unitcircle;
    path neckAndTorso =
      this.chinPos()
      --this.neckBasePos()
      --this.tailPos();
    path armsAndShoulders =
      this.handPos(rightSide=true)
      --this.shoulderPos(rightSide=true)
      --this.shoulderPos(rightSide=false)
      --this.handPos(rightSide=false);
    path legs =
      this.footPos(rightSide=true)
      --this.tailPos()
      --this.footPos(rightSide=false);
    draw(pic, armsAndShoulders, outline);
    draw(pic, legs, outline);
    draw(pic, neckAndTorso, outline);
    filldraw(pic, head, fill, outline);
  }
}