int n=13; 
int currentCN=0;
boolean showHelp=true;

//mouse color control
float cn[]= new float [n];
int markerLength=30;

void mouseMoved(){
  stroke(255);
  for (int i=0;i<n;i++){
    if (mouseX>width*i/n && mouseX<width*constrain(i+1,0,n)/n){
      pushMatrix();
      translate(width/n,height/2-markerLength/2,-cn[3]*1500);
      stroke(255);
      line(width*(i-1)/n,0,width*(i-1)/n,markerLength);
      line(width*i/n,0,width*i/n,markerLength);
      popMatrix();

      currentCN=i;
      slider(i);
    }
  }


  if (showHelp){
    help(currentCN);
  }

}

float [] t=new float[n];
boolean [] timerBool=new boolean[n];


void timer(){
  for (int i=0;i<n;i++){
    if (timerBool[i]){
      cn[i]=cn[i]+t[i];

      if (millis()%1000<500){
        slider(i);
      }
    }

    if (cn[i]>1||cn[i]<-1){
      if (timerBool[i]==true){
        t[i]=-1*t[i];
      }

    }
  }

}

float [] b=new float[n];
boolean [] beatBool=new boolean[n];

void beater(){
  for (int i=0;i<n;i++){

    if (beatBool[i]){
      cn[i]=cn[i]+b[i];

      slider(i);

      if (cn[i]>1||cn[i]<-1){
        if (beatBool[i]==true){
          b[i]=-b[i];
        }
      }
    }
  }
}


void help(int i){
  String variables="r,g,b,zoom,transparency,null,space,damp,bleed,sensitivity,blobFreq,blobSense,blobThres";
  String cnH[]=split(variables,',');

  pushMatrix();
  translate(width*(i)/n+width/n/2,height/2,-cn[3]*1500);
  textFont(smFont);
  textSize(18);
  textAlign(CENTER);
  fill(255);
  text(cnH[i],0,0);
  popMatrix();
}


void mouseDragged() {
  for (int i=0;i<n;i++){
    if (mouseX>width*i/n && mouseX<width*constrain(i+1,0,n)/n){
     // if (mouseButton == RIGHT){
        cn[i]=constrain(cn[i]+(pmouseY-mouseY)/(height/2-.001f) ,-1,1);
        slider(i);

      //}
    }
  }
}



void slider(int position){

  pushMatrix();
  translate(width*(position)/n+width/n/2-markerLength/2,height/2,-cn[3]*1500);
  stroke(255);
  strokeWeight(0.4);
  line(0,-cn[position]*height,markerLength,-cn[position]*height);
  popMatrix();


}

int nBeats=33;
float [] beat=new float[nBeats];
 float bps=0;
    float bpm=0;
    
void beatCounter(){

  if(keyPressed&&key==' '){

    beat=reverse(beat);
    beat=shorten(beat);
    beat=reverse(beat);
    beat=append(beat,millis());
    //println(beat);
    float beatTotal=0;
    for (int i=1;i<nBeats;i++){
      beatTotal=beatTotal+beat[i]-beat[i-1];
    }

     bps=beatTotal/(nBeats)/1000;

     bpm=60/bps;
    println(bpm);

    //sliders
    for (int i=0;i<n;i++){
      b[i]=bps*height/2/nBeats/10;
    }

  }
      if (millis()%1000>int(bps*1000) ){
      fill(255,255,255);
      ellipse(width/2,height/2,100,100); 
    }
}