P5Visualization/conway_game_of_life.html at main · Sylus1000/P5Visualization · GitHub

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<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>GameOfLife</title>
    <style>
      body {
        margin: 0;
        overflow: hidden;
      }
    </style>
  </head>
  <body>
    <script
      src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/1.4.0/p5.min.js"
      integrity="sha512-N4kV7GkNv7QR7RX9YF/olywyIgIwNvfEe2nZtfyj73HdjCUkAfOBDbcuJ/cTaN04JKRnw1YG1wnUyNKMsNgg3g=="
      crossorigin="anonymous"
      referrerpolicy="no-referrer"
    ></script>
    <script>
      function makeGrid(cols, rows) {
        let grid = new Array(cols);
        for (let i = 0; i < grid.length; i++) {
          grid[i] = new Array(rows);
          for (let j = 0; j < grid[i].length; j++) {
            grid[i][j] = 0;
          }
        }
        return grid;
      }

      var grid, newGrid;
      var cols, rows;
      var resolution_slider;
      var fps_slider;

      function setup() {
        createCanvas(window.innerWidth, window.innerHeight);

        init();

        fps_slider = createSlider(10, 60, 60, 1)
          .position(10, 10)
          .style("width", "200px");

        resolution_slider = createSlider(5, 20, 5, 1)
          .position(10, 40)
          .style("width", "200px");

        createButton("Reset")
          .position(10, 70)
          .style("width", "100px")
          .style("height", "25px")
          .mousePressed(init);
      }

      function init() {
        loadImage(
          "pattern.png",
          (img) => {
            imageInitialize(img);
          },
          (err) => {
            randomlyInitialize();
          }
        );
      }

      //Not working idk why... :(
      function imageInitialize(p5Img) {
        //Load pixel array
        p5Img.loadPixels();
        pixels = p5Img.pixels;

        //Calculate grid
        cols = p5Img.width;
        rows = p5Img.height;
        grid = makeGrid(cols, rows);

        //console.table(grid);

        let j = 0;

        for (let i = 0; i < pixels.length; i++) {
          //After cols iterations increase j
          if ((i + 1) % cols === 0) j++;

          //Black pixel
          if (pixels[i] === 0 && pixels[i + 1] === 0 && pixels[i + 2] === 0) {
            grid[i][j] = 0;
          }
          //White pixel
          else if (
            pixels[i] === 255 &&
            pixels[i + 1] === 255 &&
            pixels[i + 2] === 255
          ) {
            grid[i][j] = 1;
          }
        }
      }

      function randomlyInitialize() {
        //Initialize grid with random values between 0 and 1
        cols = floor(width / resolution_slider.value());
        rows = floor(height / resolution_slider.value());
        grid = makeGrid(cols, rows);
        for (let i = 0; i < grid.length; i++) {
          for (let j = 0; j < grid[i].length; j++) {
            grid[i][j] = floor(random(2));
          }
        }
        return grid;
      }

      function draw() {
        frameRate(fps_slider.value());
        background(0);
        showGrid();
        newGrid = makeGrid(cols, rows);
        computeState();
        grid = newGrid;
      }

      function computeState() {
        for (let i = 0; i < cols; i++) {
          for (let j = 0; j < rows; j++) {
            let state = grid[i][j];
            let neighbours = countNeighbours(grid, i, j);
            if (state === 0 && neighbours === 3) {
              newGrid[i][j] = 1;
            } else if (state === 1 && (neighbours < 2 || neighbours > 3)) {
              newGrid[i][j] = 0;
            } else {
              newGrid[i][j] = state;
            }
          }
        }
      }

      function countNeighbours(grid, x, y) {
        let sum = 0;
        for (let i = -1; i < 2; i++) {
          for (let j = -1; j < 2; j++) {
            sum += grid[(x + i + cols) % cols][(y + j + rows) % rows];
          }
        }
        return sum;
      }

      function showGrid() {
        for (let i = 0; i < cols; i++) {
          for (let j = 0; j < rows; j++) {
            if (grid[i][j] === 1) {
              fill(255);
              stroke(0);
              rect(
                i * resolution_slider.value(),
                j * resolution_slider.value(),
                resolution_slider.value() - 1,
                resolution_slider.value() - 1
              );
            }
          }
        }
      }
    </script>
  </body>
</html>