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/ 7 Years ago, sun, january 22, 2017, 12:00:00
I can not figure out how to render a Three-js scene in a canvas on my index page. I have the basic template for the canvas and the basic template for the three-js scene. So how do I render the scene in my canvas?
index.html
<!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>
<!--Jquery links-->
<script src=node_modules/jquery/dist/jquery.min.js rel=script></script>
<!-- Bootstrap links -->
<link href=node_modules/bootstrap/dist/css/bootstrap.min.css rel=stylesheet>
<script src=node_modules/bootstrap/dist/js/bootstrap.min.js rel=script></script>
<!--Three-js links-->
<script src=node_modules/three-js/three.js rel=script></script>
<!-- Custom css and javascript links -->
<link rel=stylesheet href=css/styles.css>
<script src=js/canvas.js rel=script></script>
<script src=js/artifactScene.js rel=script></script>
<title></title>
</head>
<body onload=start()>
<div class=container>
<div id=indexRowOne class=row>
<!--#region sidebarColumn-->
<div id=sidebarColumn class=col-md-3 pull-left>
<div class=sidebarContainer>
<button><img src=img/egyptMenuGlyph.png><h4>Ancient Egypt</h4></button>
<button><img src=img/greeceMenuGlyph.png><h4>Ancient Greece</h4></button>
<button><img src=img/romeMenuGlyph.png><h4>Ancient Rome</h4></button>
</div>
</div>
<!--#endregion sidebarColumn-->
<div id=canvasColumn class=col-md-6>
<div class=canvasContainer>
<canvas id=artifactCanvas>
</canvas>
</div>
</div>
<div id=artifactColumn class=col-md-3 pull-right>
<div class=artifactFrameDiv >
<img src=artifacts/egypt/graniteHeadofAmenemnat/headOfAhkhmenet.png class=artifactImage>
<img src=artifacts/egypt/horus_falcon/horusFalcon.png>
<img src=img/test.png>
<img src=img/test.png>
<img src=img/test.png>
<img src=img/test.png>
<img src=img/test.png>
<img src=img/test.png>
<img src=img/test.png>
<img src=img/test.png>
<img src=img/test.png>
<img src=img/test.png>
<img src=img/test.png>
</div>
</div>
</div>
</div>
</body>
canvas.js
var gl; // A global variable for the WebGL context
function start() {
var canvas = document.getElementById(artifactCanvas);
// Initialize the GL context
gl = initWebGL(canvas);
canvas.width = 673;
canvas.height = 472;
// Only continue if WebGL is available and working
if (!gl) {
return;
}
// Set clear color to black, fully opaque
gl.clearColor(0.0, 0.0, 0.0, 1.0);
// Enable depth testing
gl.enable(gl.DEPTH_TEST);
// Near things obscure far things
gl.depthFunc(gl.LEQUAL);
// Clear the color as well as the depth buffer.
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
}
function initWebGL(canvas) {
gl = null;
// Try to grab the standard context. If it fails, fallback to experimental.
gl = canvas.getContext(webgl) || canvas.getContext(experimental-webgl);
// If we don't have a GL context, give up now
if (!gl) {
alert(Unable to initialize WebGL. Your browser may not support it.);
}
return gl;
}
artifactScene.js
var scene = new THREE.Scene();
var camera = new THREE.PerspectiveCamera( 75, window.innerWidth/window.innerHeight, 0.1, 1000 );
var renderer = new THREE.WebGLRenderer();
renderer.setSize( window.innerWidth, window.innerHeight );
document.body.appendChild( renderer.domElement );
var geometry = new THREE.BoxGeometry( 1, 1, 1 );
var material = new THREE.MeshBasicMaterial( { color: 0x00ff00 } );
var cube = new THREE.Mesh( geometry, material );
scene.add( cube );
camera.position.z = 5;
var render = function () {
requestAnimationFrame( render );
cube.rotation.x += 0.1;
cube.rotation.y += 0.1;
renderer.render(scene, camera);
};
render();
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