rendeer.js

Rendeer.js is a lightweight 3D scene graph library, meant to be used in 3D web apps and games. It is meant to be flexible and easy to tweak. It used the library litegl.js as a low level layer for WebGL.

It comes with some common useful classes like:

• Scene and SceneNode
• Camera
• Renderer
• SkeletalAnimation
• ParticleEmissor

And because it uses litegl you have all the basic ones (Mesh, Shader and Texture).

Demo

Check the examples folder to see the examples, or visit this website.

There is a boilerplate to create an application in the folder boilerlate/

Usage

Here is a brief example of how to use it, but I totally encourage to read the more detailed starter guide stored in the guides folder, or to check the boilerplate provided, and finally check the documentation for better understanding of the API.

First include the library and dependencies

<script src="js/gl-matrix-min.js"></script>
<script src="js/litegl.js"></script>
<script src="js/rendeer.js"></script>

Create the scene

var scene = new RD.Scene();

Create the renderer

var context = GL.create({width: window.innerWidth, height:window.innerHeight});
var renderer = new RD.Renderer(context);

Attach to DOM

document.body.appendChild(renderer.canvas);

Get user input

gl.captureMouse();
renderer.context.onmousedown = function(e) { ... }
renderer.context.onmousemove = function(e) { ... }

gl.captureKeys();
renderer.context.onkey = function(e) { ... }

Set camera

var camera = new RD.Camera();
camera.perspective( 45, gl.canvas.width / gl.canvas.height, 1, 1000 );
camera.lookAt( [100,100,100],[0,0,0],[0,1,0] );

Create and register mesh

var mesh = GL.Mesh.fromURL("data/mesh.obj");
renderer.meshes["mymesh"] = mesh;

load and register texture

var texture = GL.Texture.fromURL("mytexture.png", { minFilter: gl.LINEAR_MIPMAP_LINEAR, magFilter: gl.LINEAR });
renderer.textures["mytexture.png"] = texture;

Compile and register shader

var shader = new GL.Shader(vs_code, fs_code);
renderer.shaders["phong"] = shader;

Add a node to the scene

var node = new RD.SceneNode();
node.color = [1,0,0,1];
node.mesh = "mymesh";
node.texture = "mytexture.png";
node.shader = "phong";
node.position = [0,0,0];
node.scale([10,10,10]);
scene.root.addChild(node);

Create main loop

requestAnimationFrame(animate);
function animate() {
	requestAnimationFrame( animate );

	last = now;
	now = getTime();
	var dt = (now - last) * 0.001;
	renderer.render(scene, camera);
	scene.update(dt);
}

Documentation

The doc folder contains the documentation. For info about glMatrix check the documentation in its website.

Utils

It includes several commands in the utils folder to generate doc, check errors and build minifyed version.

Feedback

You can write any feedback to javi.agenjo@gmail.com