/*
Chunk 46 - Line Pattern Generator
 Rosie Wood Msrch 2009
 */
int numLines=20;
int stepH=0;
int stepW=0;
int n=0;
int x=0;
int y=0;
int rannum=3;
int rannum2=0;
int design=1;
int patsPerPic=5;
int count=0;
int drawCount=0;
boolean [] segments={false,false,false,false,false,false,false,false};

void setup(){
  size(400, 400);
  //colorMode(HSB,230,1,200);
  stepH=height/numLines;
  stepW=width/numLines;
  strokeWeight(1);
  smooth();
  frameRate(30);
}


void draw(){
  patsPerPic=round(random(2,7));
  background(0);
  count=0;
  n=0;
  int choice=0;
  boolean started=false;
  while(count<patsPerPic){ 
   resetSegs();
   for(int n=0;n<8;n++){
       if(round(random(1))==0){segments[n]=true;}      
   }   
    changeColour();
    rannum=round(random(2));
    rannum2=round(random(6));
    design=round(random(10));
    for(x=0;x<width+1;x=x+stepW){
      for(y=0;y<height+1;y+=stepH){
        switch(design){
        case 0:  //all meshes moved to case 0      
          if(started==false){             
              choice=round(random(3));
              started=true; }
          if(y<height+1){
          if(choice==0){
            stripes();}
          else if(choice==1){
          stripes2();}
          else if(choice==2){
           triangle3();}
          else{
          inwards();}}
          break;
        case 1:
          segs1();//pattern 7 separation
          break;
        case 2:
          line(x,y,width-x,height-y);//star
          break;
        case 3: 
          segs2();//pattern 7 separation
          break;
        case 4:
          bowTie();
          break; 
        case 5:
          bigArches();
          break; 
        case 6:
          butterfly();
          break; 
       
       case 8:
          tapestry();
          break; 
       case 9://to be decided        
       case 7:
       case 10:
          oops();
          break; 

        }
      }
    }
    count++;
  }
  drawCount++;
  if(drawCount>50)drawCount=0;
  String fName="line"+drawCount+".gif"; 
  save(fName);
}

void changeColour(){
  stroke(random(255),random(255),random(255),random(255));
}

//patterns
void triangle1(){//3 choices

  if(rannum==0||rannum==2){
    line(0,x,y,height);
    line(height,height-x,y,0);
    if(rannum==1||rannum==2){    
      line(width,y,height-x,height);
      line(0,y,x,0);
    }
  }
}

void stripes(){
  if(rannum==0||rannum==2){
    line(width,height-y,y,0);//stripes
    line(0,height-y,y,height);
  }
  if(rannum==0||rannum==2){
    line(width-y,0,0,height-y);//stripes
    line(width,height-y,width-y,height);
  }
}

void stripes2(){
  if(rannum==1||rannum==0){
    line(x,y,width,y);
  }    
  if(rannum==2||rannum==0){  
    line(x,height-y,x,0);
  }

}

void bowTie(){
  if(rannum==1||rannum==0){
    line(x,height,width-x,0);}
  if(rannum==2||rannum==0){
      line(0,y,width,height-y);}
}

void bigArches(){
  rannum=0;
  if(rannum==1||rannum==0){
    line(x,0,width,x);//large mesh ur
    line(0,y,y,width);}
  if(rannum==2||rannum==0){
    line(0,height-y,y,0);//large mesh u l
    line(width,height-y,y,height);}  
}

void butterfly(){
       if(rannum==1||rannum==0){
         line(x,height-y,width-x,0);
         line(x,y,width-x,height);}
       if(rannum==2||rannum==0){
          line(width,width-y,x,y);//butterfly r
          line(0,y,x,height-y);}}

void inwards(){
     line(0,0,height-y,y);//inwards l d
     line(width,height,y,height-y);//inwards r u
     line(0,height,y,y);//inwards l u
     line(width,0,y,y);//inwards r d
}

void tapestry(){
  if(rannum==1||rannum==0)
     line(x,height,y,0);
  if(rannum==2||rannum==0)
     line(height,height-y,0,x);//tapestry 
}

void triangle3(){
   if(rannum==1||rannum==0){  
     line(0,0,y,height);//ray uld
     line(0,0,width,height-y);//ray ulr    
     line(width-x,0,width,height);//ray  d r u 
     line(0,y,width,height);//ray d r l
  }
 if(rannum==2||rannum==0){   
   line(width,0,0,height-y);//ray u r l
   line(width,0,height-y,height);//ray u r d 
   line(0,height,width-x,0);// dl u     
   line(0,height,width,height-y);//ray d l r
 }}
 
 void oops(){
   
   println(segments);
   if(segments[0]==true){
    line(0,height-y,y,y);}//oopsleft down
   if(segments[1]==true){
    line(width-x,0,x,x);}//oopsup right
   if(segments[2]==true){
    line(x,0,width-x,x);}//oopsup left
   if(segments[3]==true){
    line(width,y,y,height-y);}//oopsright down
   if(segments[4]==true){
    line(width,height-y,y,y);}//oopsrightup
   if(segments[5]==true){
    line(width-x,height,x,x);}//oopsdown left
   if(segments[6]==true){
    line(x,height,width-x,x);}//oopsdown right
   if(segments[7]==true){
    line(0,y,y,height-y);}//oopsleft up
                       
 }
 
 void segs1(){
    if(rannum==0||rannum==1){
    line(0,height-y,y,y);//oopsleft down
    line(0,y,y,height-y);//oopsleft up
    line(width,height-y,y,y);//oopsrightup
    line(width,y,y,height-y);//oopsright down
    } 
    if(rannum==0||rannum==2){
     line(x,0,width-x,x);//oopsup left
     line(x,height,width-x,x);//oopsdown right
     line(width-x,0,x,x);//oopsup right
     line(width-x,height,x,x);//oopsdown left
    }
 }
 
 void segs2(){
   if(rannum==0||rannum==1){
    line(width,y,y,height-y);//oopsright down
    line(0,y,y,height-y);//oopsleft up
    line(x,0,width-x,x);//oopsup left
    line(x,height,width-x,x);//oopsdown right
   }
  if(rannum==0||rannum==2){
    line(0,height-y,y,y);//oopsleft down
    line(width,height-y,y,y);//oopsrightup  
    line(width-x,0,x,x);//oopsup right
    line(width-x,height,x,x);//oopsdown left   
 }}

void resetSegs(){
  for(int n=0;n<segments.length;n++){
  segments[n]=false;
  }
}