／var／logmarcus chiu

WebGL - Tutorial 1 - Simple

Created on

HTML

<!DOCTYPE html>
<html lang="en">
<head>
    <script src="index.js"></script>
</head>
<body>
	<canvas id="glCanvas" width="640" height="480"></canvas>
</body>
</html>

Javascript

function main() {
  const canvas = document.querySelector("#glCanvas");
  // Initialize the GL context, returns null if WebGL is not supported in browser
  const gl = canvas.getContext("webgl");
  const gl = canvas.getContext("webgl2");
 
  // Only continue if WebGL is available and working
  if (gl === null) {
    alert("Unable to initialize WebGL. Your browser or machine may not support it.");
    return;
  }
 
  // Set clear color to black, fully opaque
  gl.clearColor(0.0, 0.0, 0.0, 1.0);
  // Clear the color buffer with specified clear color
  gl.clear(gl.COLOR_BUFFER_BIT);
}
 
window.onload = main;