//********************************************************************//
//CAAD D_ARCH UnCover PSZ Project: Pillars_Pavilion      Class Pillar //
//WS06/07   12. FEB. 2007        by Huang, Yung-Chieh | BaTeam MaeTaB //   
//********************************************************************//
class Pillar
{
  float Radius;                         //pillar radius
  float PosX;                           //pillar position x
  float PosY;                           //pillar position y

  Pillar(float r, float px, float py)
  {
    Radius=r;
    PosX=px;
    PosY=py;
  }

  /**********Set Movement Rules**********/
  void move(float dm, int b)
  {
    ellipseMode(CENTER);
    float mx1=mouseX;
    float my1=mouseY;
    float mx2=width-mouseX;
    float my2=height-mouseY;
    float d1 = dist(PosX, PosY, mx1, my1);
    float d2 = dist(PosX, PosY, mx2, my2);
    color c = color(d1/2, (255-(d1/2)), (255-d1));
    stroke(c);
    fill(c);

    float mbx1=((PosX-mx1)*dm*dm)/(d1*d1*b*40);
    float mby1=((PosY-my1)*dm*dm)/(d1*d1*b*40);
    float mbx2=((PosX-mx2)*dm*dm)/(d2*d2*b*40);
    float mby2=((PosY-my2)*dm*dm)/(d2*d2*b*40);

    if((d2 <= 1.6*b) && (d1 > 1.6*b)){
      PosX += ((PosX-mx2)*dm*dm)/(102.4*b*b*b);
      PosY += ((PosY-my2)*dm*dm)/(102.4*b*b*b);
    }
    else if((d2 <= dm) && (d2 > 1.6*b) && (d1 > 1.6*b)){
      PosX += mbx2;
      PosY += mby2;
    }
    if(d1 <= 1.6*b){
      PosX += ((PosX-mx1)*dm*dm)/(102.4*b*b*b);
      PosY += ((PosY-my1)*dm*dm)/(102.4*b*b*b);
    }
    else if((d1 <= dm) && (d1 > 1.6*b)){
      PosX += mbx1;
      PosY += mby1;
    }

    /**********Pillar Field Limitation**********/
    if(PosX < b){
      PosX=b;
    }
    if(PosX > (width-b)){
      PosX = (width-b);
    }
    if(PosY < b){
      PosY=b;
    }
    if(PosY > (height-b)){
      PosY = (height-b);
    }

    /*********Draw Pillar*********/
    strokeWeight(100);
    ellipse(PosX, PosY, Radius*2, Radius*2);
    line(PosX, PosY, 0, PosX, PosY, 5*b);
  }
}