int baseUnit = 4;
int baseGridPower = 2;
int [][] grid;
PFont font;
Buttons [] button;
void setup(){
  size(550,400,P3D);
  font = loadFont("BitstreamVeraSans-Roman-48.vlw");
  textFont(font,12);
  button = new Buttons[6];
button[0] = new Buttons(25,200,150,20,#FFFFFF,"Reset Grid",null);
button[1] = new Buttons(25,220,150,20,#FFFFFF,"Increase Base Unit:"+baseUnit,null);
button[2] = new Buttons(25,240,150,20,#FFFFFF,"Decrease Base Unit:"+baseUnit,null);
button[3] = new Buttons(25,260,150,20,#FFFFFF,"Increase Grid Power:"+baseGridPower,null);
button[4] = new Buttons(25,280,150,20,#FFFFFF,"Decrease Grid Power:"+baseGridPower,null);
button[5] = new Buttons(25,300,150,20,#FFFFFF,"Add Numbers",null);
  grid = new int[2][];
  grid[0] = new int[int(pow(baseUnit,baseGridPower))];
  grid[1] = new int[int(pow(baseUnit,baseGridPower+2))];
  for(int j = 0; j < grid[0].length; j++){
    grid[0][j] = 0;
  }
  for(int j = 0; j < grid[1].length; j++){
    grid[1][j] = int(random(4));
  }

}
void draw(){
  background(50);
  drawGrid(0,50,50,100,100);
  drawGrid(1,200,50,300,300);
  for (int i = 0; i < button.length; i++){
    button[i].draw();
  }
}

void mousePressed(){
  int choice = -1;
  for (int i = 0; i < button.length; i++){
    if(button[i].over()){
      choice = i;
    }
  }
  switch(choice){
  case 0:
    resetGrid();
    break;
  case 1:
    baseUnit = (baseUnit+1)%7;
    button[1].label = "Increase Base Unit:"+baseUnit;
    button[2].label = "Decrease Base Unit:"+baseUnit;
    resetGrid();
    break;
  case 2:
    baseUnit--;
    if (baseUnit < 0) baseUnit = 0;
    button[1].label = "Increase Base Unit:"+baseUnit;
    button[2].label = "Decrease Base Unit:"+baseUnit;
    resetGrid();
    break;
  case 3:
    baseGridPower = (baseGridPower+1)%7;
    if(baseGridPower > 1 && (baseGridPower>>1)<<1 != baseGridPower){
      //doesn't like odd powers so I have to skip them
      baseGridPower++;
    }
    button[3].label = "Increase Grid Power:"+baseGridPower;
    button[4].label = "Decrease Grid Power:"+baseGridPower;
    resetGrid();
    break;
  case 4:
    baseGridPower--;
    if(baseGridPower > 1 && (baseGridPower>>1)<<1 != baseGridPower){
      baseGridPower--;
    }
    if (baseGridPower < 0) baseGridPower = 0;
    button[3].label = "Increase Grid Power:"+baseGridPower;
    button[4].label = "Decrease Grid Power:"+baseGridPower;
    resetGrid();
    break;
  case 5:
    upload(0);
    break;
  }
}
void resetGrid(){
  grid = new int[2][];
  grid[0] = new int[int(pow(baseUnit,baseGridPower))];
  grid[1] = new int[int(pow(baseUnit,baseGridPower+2))];
  for(int j = 0; j < grid[0].length; j++){
    grid[0][j] = 0;
  }
  for(int j = 0; j < grid[1].length; j++){
    grid[1][j] = int(random(4));
  }
}
void upload(int i){
  //loads values from a larger grid to a smaller grid
  //readLength is included in case reading blocks are smaller that root of baseLength (as in neural net layers)
  int readLength = baseUnit;
  int baseLength = int(sqrt(grid[i].length));
  int sourceLength = int(sqrt(grid[i+1].length));
  for (int j = 0; j < grid[i].length; j++){
    int sourceStart = ((j % baseLength) * readLength) + (((j / baseLength) * readLength) * sourceLength);
    int sourceEnd = sourceStart+(sourceLength*readLength);
    for (int k = sourceStart; k < sourceEnd; k += sourceLength){
      for (int m = 0; m < readLength; m++){
        //println(k+m);
        grid[i][j] += grid[i+1][k+m];
      }
    }
    //println("coda");
  }
}
void drawGrid(int gridNumber, float x, float y, float w, float h){
  //draws a matrix stored linearly as a grid
  int sideLength = int(sqrt(grid[gridNumber].length));
  float xStep = w/sideLength;
  float yStep = h/sideLength;
  fill(255);
  stroke(255,0,0);
  for(int i = 0; i < sideLength; i++){
    line(x,y+(yStep*i),x+(w-xStep),y+(yStep*i));
  }
  for(int i = 0; i < sideLength; i++){
    line(x+(xStep*i),y,x+(xStep*i),y+(h-yStep));
  }
  for(int i = 0; i < sideLength; i++){
    for(int j = 0; j < sideLength; j++){
      text(grid[gridNumber][i+j*sideLength],x+(xStep*i),y+(yStep*j));
    }
  }
}