拡大するキューブ群2

/**
*  enlarging crowd of cubes 2
*
* @author aa_debdeb
* @date 2016/09/14
*/

int BOX_NUM = 25;
float BOX_SIZE = 20;
int[][][] states;
int[][][] neighbors;
int[][] moves = {{1, 0, 0}, {0, 1, 0}, {0, 0, 1}, {-1, 0, 0}, {0, -1, 0}, {0, 0, -1}};
ArrayList<Block> blocks;
ArrayList<Block> pBlocks;

void setup(){
  size(500, 500, P3D);
  stroke(255);
  strokeWeight(2);
  fill(255, 20, 147);
  neighbors = new int[BOX_NUM][BOX_NUM][BOX_NUM];
  states = new int[BOX_NUM][BOX_NUM][BOX_NUM];
  blocks = new ArrayList<Block>();
  pBlocks = new ArrayList<Block>();
  for(int i = 0; i < 10; i++){
    addBlock(int(random(BOX_NUM)), int(random(BOX_NUM)), int(random(BOX_NUM)));
  }
}

void addBlock(int x, int y, int z){
  if(states[x][y][z] != 2 && states[x][y][z] != 3){
    Block block = new Block(x, y, z);
    blocks.add(block);
    states[x][y][z] = 2;
    for(int[] move: moves){
      int nx = x + move[0];
      int ny = y + move[1];
      int nz = z + move[2];
      if(0 <= nx && nx < BOX_NUM && 0 <= ny && ny < BOX_NUM && 0 <= nz && nz < BOX_NUM){
        neighbors[nx][ny][nz]++;
        if(neighbors[nx][ny][nz] == 6){
          states[nx][ny][nz] = 3;
        }
        if(states[nx][ny][nz] == 0){
          states[nx][ny][nz] = 1;
          pBlocks.add(new Block(nx, ny, nz));
        }
      }
    }
  }
}

void draw(){
  background(255);
  translate(width / 2, height / 2, BOX_NUM * BOX_SIZE / 2 - 500);
  lights();
  rotateY(map(mouseX, 0, width, -PI / 4, PI / 4));
  rotateX(map(mouseY, 0, height, -PI / 4, PI / 4));
  for(Block block: blocks){
    block.display();
  }
  
  Block pBlock = pBlocks.remove(int(random(pBlocks.size())));
  addBlock(pBlock.x, pBlock.y, pBlock.z);
}

class Block{

  int x, y, z;
  
  Block(int _x, int _y, int _z){
    x = _x;
    y = _y;
    z = _z;
  }
  
  void display(){
    if(states[x][y][z] != 3){
      pushMatrix();
      translate(x * BOX_SIZE + BOX_SIZE / 2 - width / 2, y * BOX_SIZE + BOX_SIZE / 2 - height / 2, z * BOX_SIZE + BOX_SIZE / 2 - BOX_NUM * BOX_SIZE / 2);
      box(BOX_SIZE);
      popMatrix();
    }
  }
  
}