// voxels? --> ok, not really voxels, but cubes in a grid
// mikkel . crone . koser
// http://www.beyondthree.com
// proce55ing.beyondthree.com

Voxel[] allVoxels;

BImage bg;
String dir = "down";

//int POP = 100;
int dim = 40;
int xPOP = 6;
int yPOP = 6;

void setup(){
  size(360, 360);

  bg = loadImage("bg.gif");

  // populate allVoxels
  allVoxels = new Voxel[xPOP * yPOP];
  for(int j = 0; j < yPOP; j++){
    for(int i = 0; i < xPOP; i++){
      allVoxels[(j*yPOP) + i] = new Voxel(i*(width/xPOP) + (width/xPOP)/2, j*(height/yPOP) + (width/yPOP)/2);
    }
  }
}

void keyPressed(){
  if(key == UP){
    dir = "up";
  }else if(key == DOWN){
    dir = "down";
  }else if(key == LEFT){
    dir = "left";
  }else if(key == RIGHT){
    dir = "right";
  }else if(key == '1'){
    dim = 25;
  }else if(key == '2'){
    dim = 30;
  }else if(key == '3'){
    dim = 35;
  }else if(key == '4'){
    dim = 40;
  }else if(key == '5'){
    dim = 45;
  }else if(key == '6'){
    dim = 50;
  }else if(key == '7'){
    dim = 55;
  }else if(key == '8'){
    dim = 60;
  }
}

void loop(){
  background(bg);
  translate(0, 0, -50);
  //background(255);

  // render voxels
  for(int j = 0; j < yPOP; j++){
    for(int i = 0; i < xPOP; i++){
      //allVoxels[(j*yPOP) + i] = new Voxel(i*xPOP, j*yPOP);
      allVoxels[(j*yPOP) + i].render();
    }
  }
}

class Voxel{
  int x, y;
  int xDist, yDist;
  float rotX, rotY;

  Voxel(int xx, int yy){
    x = xx;
    y = yy;
  }

  void render(){
    // relationship with mouse
    xDist = abs(mouseX - x);
    yDist = abs(mouseY - y);

    // draw it
    push();

    // focus
    translate(x, y);

    // mouseWITHIN
    if(xDist <= dim/2 && yDist <= dim/2){
      stroke(255, 200, 0);
      if(dir == "down"){
        rotX = PI/2;
      }else if(dir == "up"){
        rotX = 0;
      }else if(dir == "left"){
        rotY = PI/2;
      }else if(dir == "right"){
        rotY = 0;
      }

    }else{
      stroke(0, 0, 0);
      if(dir == "down"){
        rotX = rotX - 0.1;
        rotX = max(0, rotX);
      }else if(dir == "up"){
        rotX = rotX + 0.1;
        rotX = min(PI/2, rotX);
      }else if(dir == "left"){
        rotY = rotY - 0.1;
        rotY = max(0, rotY);
      }else if(dir == "right"){
        rotY = rotY + 0.1;
        rotY = min(PI/2, rotY);
      }
    }

    // rotate
    if(rotX != 0){
      if(dir == "left" || dir == "right"){
        rotX = rotX - 0.1;
        rotX = max(0, rotX);
      }
    }
    rotateX(rotX);
    
    if(rotY != 0){
      if(dir == "up" || dir == "down"){
        rotY = rotY - 0.1;
        rotY = max(0, rotY);
      }
    }
    rotateY(rotY);

    // draw
    box(dim);

    pop();
  }
}