class CircShape{

  float cx,cy,x,y,cxNorm,cyNorm,r;

  float brightnessValue;

  CircShape(float _cx,float _cy,float _r){

    cx=_cx;
    cy=_cy;
    r=_r;

  }

  void update(){

    cxNorm= cx/width;
    cxNorm=constrain(cxNorm,0.0,1.0);

    cyNorm= cy/height;
    cyNorm=constrain(cyNorm,0.0,1.0);


    //Brightness setup based on cx,cy normalized position
    //control if cx,cy or cy&&cy are asking for brightness of pixels out of img.pixels bounds
    if(cx>=width&&cy>=height){
      brightnessValue=brightness(img.get(img.width-1,img.height-1));
    }
    else if(cx>=width){
      brightnessValue=brightness(img.get(int(cxNorm*img.width)-1,int(cyNorm*img.height)));
    }
    else if(cy>=height){
      brightnessValue=brightness(img.get(int(cxNorm*img.width),int(cyNorm*img.height)-1));
    }
    else{
      brightnessValue=brightness(img.get(int(cxNorm*img.width),int(cyNorm*img.height)));
    }


    //
    render();

  }


  void render(){

    //
    stroke(0);
    fill(brightnessValue);


    //stroke(1.0-brightnessValue);

    beginShape();

    for(int i=0;i<lati;i++){
      x=cx+cosArr[i]*r;
      y=cy+sinArr[i]*r;
      vertex(x,y);
    }

    endShape(CLOSE);

    //Center
    /*noStroke();
     fill(1.0-brightnessValue);
     rect(cx-1,cy-1,2,2);
     */
    //

  }

}