game of life with your smartphone

//this code doesn't work in laptop .please use cellphone.

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let grid;

let cols;

let rows;

let resolution = 5;

let buttontakePhoto;

let buttonsavePhoto;

let photoSave;

let modo = 0;

let confirmPhoto = false;

let mic;

var video;

let mySound;

let capture ;

let value = 0;

let switchFlag = false;

let switchBtn;

let x = window.screen.width;

let y = window.screen.height;

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  var options= {  //スマホ用にカメラを切り替え

    audio: false,

    video: {

      facingMode: {

        exact: "environment" //previous:environment

      }

    }    

  };

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function make2DArray(cols, rows) {

  let arr = new Array(cols);

  for (let i = 0; i < arr.length; i++) {

    arr[i] = new Array(rows);

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  }

  return arr;

}

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function setup() {

 let c = createCanvas(500, 700);

//c.mousePressed(canvasPressed);

  bx = width / 2.0;

  by = height-150 ;

  rectMode(RADIUS);

  strokeWeight(2);

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  cols = width / resolution;

  rows = height / resolution;

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  capture = createCapture(options);

  capture.hide()

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   switchBtn = createButton('Switch Camera'); 

  switchBtn.position(19, 19);

  switchBtn.mousePressed(switchCamera);

   grid = make2DArray(cols, rows);

  for (let i = 0; i < cols; i++) {  //cols/rowsについて外部環境から何か数値を入れることで調整したい

    for (let j = 0; j < rows; j++) {

      grid[i][j] = floor(random(2));

    }

  }

}

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function switchCamera()

{  

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  switchFlag = !switchFlag;

  if(switchFlag==true)

  {

capture.remove();

  options = {

    audio:false,

     video: {

        facingMode: {

         exact: "user"

         }

     }

};

}

  else

  {

    capture.remove();

    options = {

    video:{

      facingMode:{

      exact:"environment"

      }

    }

    };

  }

  capture = createCapture(options);

}

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function draw() {

  background(0);

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  image(capture,0,0,500,700);

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  for (let i = 0; i < cols; i++) {

    for (let j = 0; j < rows; j++) {

      let x = i * resolution;

      let y = j * resolution;

      if (grid[i][j] == 1) { //要変更

        fill(random(255),random(255),j);

        noStroke();

        ellipse(x, y,resolution+1, resolution +1);

      }

    }

  }

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  let next = make2DArray(cols, rows);

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  // Compute next based on grid

  for (let i = 0; i < cols; i++) {

    for (let j = 0; j < rows; j++) {

      let state = grid[i][j];

      // Count live neighbors!

      let sum = 0;

      let neighbors = countNeighbors(grid, i, j);

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      if (state == 0 && neighbors == 3) {

        next[i][j] = 1;

      } else if (state == 1 && (neighbors < 2 || neighbors > 3 ) ) {

        next[i][j] = 0;

      } else {

        next[i][j] = state;

      }

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    }

  }

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  grid = next;

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}

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function countNeighbors(grid, x, y) {

  let sum = 0;

  for (let i = -1; i < 2; i++) {

    for (let j = -1; j < 2; j++) {

      let col = (x + i + cols) % cols;

      let row = (y + j + rows) % rows;

      sum += grid[col][row];

    }

  }

  sum -= grid[x][y];

  return sum;

}

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