Attempt to implement diamond square algorithm

Just a quick diamond square canvas thing... What is a attempt to implement diamond square algorithm How do you make a attempt to implement diamond square algorithm? This script and codes were developed by Jeff Daze on 24 March 2022, Thursday.

How do I make an attempt to implement diamond square algorithm?
  1. Attempt to implement diamond square algorithm Previews
  2. Attempt to implement diamond square algorithm HTML Codes
  3. Attempt to implement diamond square algorithm CSS Codes
  4. Attempt to implement diamond square algorithm JS Codes
Attempt to implement diamond square algorithm Previews

Attempt to implement diamond square algorithm HTML Codes

<!DOCTYPE html>
<html >
<head>
  <meta charset="UTF-8">
  <title>Attempt to implement diamond square algorithm</title>
  
  
  
      <link rel="stylesheet" href="css/style.css">

  
</head>

<body>
  <div>
  <button id="run">Draw</button>
</div>
<canvas id="c"></canvas>
  
    <script  src="js/index.js"></script>

</body>
</html>

Attempt to implement diamond square algorithm CSS Codes

#c{
  border:1px solid #000;
}

Attempt to implement diamond square algorithm JS Codes

//this must always be a power of 2 +1
//eg 65, 129, 267, 
var size="513";

//set the canvas to the specified height and width...
  //square only for now!
  $("#c").width= size;
  $("#c").height= size;


//draw a random single color pixel in the canvas...
function draw(canvas){
  var ctx = canvas.getContext('2d');
  
  var canvasData = ctx.createImageData(canvas.width, canvas.height);
  
  for (var y=0; y<canvas.height; y++){
    for (var x=0; x<canvas.width; x++){  
      setPixel(canvasData, x, y, getRandomInt(0, 255), getRandomInt(0, 255), getRandomInt(0, 255), 255);
    }
  }
  
  ctx.putImageData(canvasData, 0, 0);
}

//single pixel rendering...
function setPixel(imageData, x, y, r, g, b, a) {
    index = (x + y * imageData.width) * 4;
    imageData.data[index+0] = r;
    imageData.data[index+1] = g;
    imageData.data[index+2] = b;
    imageData.data[index+3] = a;
}


//bind click to button...
$("#run").addEventListener('click', function() {
    draw($('#c'));
}, false);



//utility functions here...

function getRandomInt(min, max){
    return Math.floor(Math.random() * (max - min + 1)) + min;
}

function $(selector){
	return document.querySelector(selector);
}
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