FeatherGL is a lightweight open source JavaScript library for managing a WebGL environment.

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view = new Feather.View(new Feather.WebGL(canvas[0]));

// Create the Vertex Array
var vertices = 
    [
        [0, 0, 0], 
        [1, 0, 0],
        [-Math.cos(Math.PI*2/3), Math.sin(Math.PI*2/3), 0],
    ];
// Create the Vertex Index Array
var vertexIndexArray = [ 0, 1, 2 ];

// Create the Normals Array
var normals =
    [
        [0, 0, -1],
        [0, 0, -1],
        [0, 0, -1],
    ];

// Construct an RGBA color
var colors =
    [
        [1.0, 0.0, 0.0, 1.0],
        [0.0, 1.0, 0.0, 1.0],
        [0.0, 0.0, 1.0, 1.0],
    ];

//* Create and initialize a new mesh object
var triangle = new Feather.Mesh(vertices, vertexIndexArray, normals, colors, Feather.MESH_TRIANGLE_STRIP);

// Center the triangle
triangle.translateX(-0.5);
triangle.translateY(-0.5);

// Add square mesh to scene
view.scene.addMesh(triangle);

//* Draw the scene
view.update();