/*
 title: Funky Chunk 16 - standalone program
 description: random pattern generator 
 created: December 2, 2008
 by: Rosie Wood
 */

// define Global variable values
//These are constant variables and therefore they are not changed
//by the program. Setting their value here in one place helps with maimtenance
int sizeWindow=400;
int centre=sizeWindow/2;
int xpos = centre;
int ypos = centre;
int patternsPerPicture=round(random(2,50));

//this variable is changed frequently by the application
int interval=width/25;
int count;
int fCount=0;
boolean [] recs=new boolean[9];

// set the sketch window size and background
//turn off fill so that patterns underneath can be seen
//set the rate that the screen refreshes at (found this value was best for this application?)
void setup(){
  size(sizeWindow, sizeWindow);
  //smooth();
  frameRate(.4);

}

void draw(){  
  background(0);     
  for(int count=0;count<patternsPerPicture;count++){
    strokeWeight(getSW());//set the strokewright to the number returned by the getSW function
    noFill();
    interval=round(random(width/140,width/10));//increment by interval in while loops
    changeColour();
    int design=round(random(1,9)); //a random numver for which design to use in the switch  
    //design=2;
    switch(design){
    case 1:         
      drawCircles(round(random(width/35,round(random(width/3,height/7)))));     //call the drawCircles function
      break;
    case 2:                          
      drawCircles(round(random(height/70,width/2)));     //call the drawCircles function
      break;
    case 3:
      repeatShapes(round(random(height/70,width/2)),'2');//use the drawCircle2 function        
      break;    
    case 4:
      repeatShapes(round(random(height/35,width/4)),'1');
      break;
    case 5:     
      drawSectors();
      break;     
    case 6:     
      repeatShapes(interval,'5');
      break;
    case 7:                  
      //repeatShapes(round(random(1,40)),'2');
      doLines();
      break;
    case 8:
      repeatShapes(round(random(height/35,width/2)),'3');
      break;
    default:  
      repeatShapes(round(random(height/140,width/2)),'4');//draws squares               
    }
  }
  //save("c"+fCount+".jpg");
 // fCount++;
 // if(fCount>=50)exit();
  patternsPerPicture=round(random(5,50));//change number of patterns for next picture
  // patternsPerPicture=1;//change number of patterns for next picture

}

//function changeColour: to change the stroke colour no parameters no return value*/
void changeColour(){
  stroke(random(255),random(255),random(255));
}

void keyPressed() { 

  save("_0ch16.jpg");
}

//function draws circles accepts parameter gap and uses it to increment loop untill        
void drawCircles(int gap){

  for(int n=0;n<sizeWindow;n+=gap){ 
    while(interval<width){     
      drawCircle(round(random(height/140,centre)));
      interval+=round(random(height/140,centre));
    }
  }
}

//no parameters, no return valur*/
void drawCircle2(int diameter){  
  ellipse(xpos, ypos, diameter-random(height/140,diameter/2), diameter-random(height/140,diameter));  
}

//accepts 1 parameter
void drawCircle3(int diameter){
  ellipse(xpos, ypos, random(height/140,width), random(height/140,width) );
}  

void drawSquares(int diameter){ 
  int r= round(random(1,4));
  rectMode(RADIUS);
  //if/if else/else block
  if(r==1){
    noStroke();
    rectMode(CENTER);
  }
  else if(r==2){
    diameter=diameter/20;
  }
  else if(r==3){
    changeColour();
    fill(round(random(255)),round(random(255)),round(random(255)),round(random(0,25)));
  }
  else{
    diameter=diameter/10;
    stroke(round(random(255)),round(random(255)),round(random(255)),round(random(255)));
  }

  rect(xpos,ypos,diameter,diameter);
}

//returns integer valur for stroke weight depending on framecount
int getSW(){
  int fc=round(random(frameCount*500)/5);
  return fc%10;
}

void repeatShapes(int gap, char c){
  char shape=c;                
  int interval=gap;
  while(interval<width){//while interval is less than the width of the window  
    if(shape=='1')drawCircles(interval);
    else if(shape=='2'){       
      drawCircles(round(random(height/140,height/3)));                                       
    }//call function drawCircle2 with a random parameter
    else if(shape=='3'){
      drawCircle3(round(random(height/140,interval)));
    }
    else if(shape=='4'){
      int r=round(random(1,5));
      if(r==1){
        noStroke(); 
        //changeColour();  
        fill(random(255),random(255),random(255),round(random(25,255)));
      }
      drawSquares(round(interval));
    }
    else{
      int r=round(random(1,5));
      if(r==1){
        noFill();
      }
      else{
        noStroke();     
        fill(random(255),random(255),random(255),round(random(25,200)));
      }     

      drawCircle2(interval);     
    } 
    interval+=gap;
  }
}



void doLines(){
  int gap=round(random(width/2));
  int n=0;
  int spacer=round(random(height/140,height/35));

  for(n=gap;n<width-gap;n+=spacer){
    line(width/2,height/2,n,0);
  }
  for( n=gap;n<width-gap;n+=spacer){
    line(width/2,height/2,0,n);
  }
  for( n=gap;n<width-gap;n+=spacer){
    line(width/2,height/2,width,n);
  }
  for( n=gap;n<width-gap;n+=spacer){
    line(width/2,height/2,n,height);
  }
}

void drawCircle(int diameter){
  ellipse(xpos, ypos, diameter,  diameter);
  ellipse(xpos, ypos, diameter-interval,  diameter);
  ellipse(xpos, ypos, diameter,  diameter-interval);
}

void resetRecs(){
  for(int r=0;r<9;r++){
    recs[r]=false;
  }
}


void drawSectors(){
  resetRecs();
  int [] midxy={
    (width/3)/(height/(height/2)), (width/3)/(height/(height/2))+width/3, (width/3)/(height/(height/2))+width/3*(height/(height/2))   };
  //decide on groups to use
  int corners=round(random(0,1)); 
  if(corners==1){
    recs[0]=recs[2]=recs[6]=recs[8]=true;
  }
  int sides=round(random(0,1)); 
  if(sides==1){
    recs[1]=recs[3]=recs[5]=recs[7]=true;
  } 
  int centre=round(random(0,1)); 
  if(centre==1){
    recs[4]=true;
  }
  rectMode(CENTER);  
  ellipseMode(CENTER); 
  int f=round(random(1,5));  
  if(f==1){
    fill(random(255),random(255),random(255),random(255));
  }
  else{
    getSW();
    changeColour();
  }
  int d=round(random(width/3));
  int sType=round(random(2));
  for(int n=0;n<9;n++){
    if(recs[n]==true){     
      int mod=n%3;
      int down=0;
      if(n>5)down=2;
      else if (n>2){
        down=1;
      }
      if(sType==1){
        rect(midxy[mod], midxy[down], d, d); 
      }
      else{
        ellipse(midxy[mod], midxy[down], d, d);
      } 
    }
  }
}