JAVASCRIPT GRAPHIC LIBRARIES

ALENA KALTUNEVICH 10/11/2013

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Summary

Introduction Most Popular JS graphic libraries HTML5 canvas element KineticJs Three.JS External links

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Introduction

JavaScript graphic libraries are free, easy to use and are based on html5 canvas element or svg technology.

They provide easy and efficient tool for creating:

2d elements: lines, curves, shapes

3d content: polygons , perspective

Styling: shades, filters

Graphs and charts,

Drag and drop interactive elements,

Animations without using Flash technology

http://www.html5canvastutorials.com/labs/html5-canvas-ultimate-flash-killer/

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Most popular JS graphic libraries D3.js Powerful library for manipulating data based documents, allows to bind arbitrary data to DOM and create original effects to visualize them.

Does not support well IE earlier versions.

http://bl.ocks.org/mbostock/3943967

http://mbostock.github.io/d3/tutorial/circle.html

Processing.js The code is written using Processing language and then it is included in HTML page, good for creating interactive graphic elements.

http://mariuswatz.com/works/abstract01js/index_auto.html

Raphael Draws graphics for web sites using SVG for most browsers, VML for older versions of IE.

http://raphaeljs.com/curver.html

http://raphaeljs.com/polar-clock.html 4

Most popular JS graphic libraries

KinetcJs Used for rendering 2d content such as curves, lines , shapes in static or animated way http://www.html5canvastutorials.com/labs/html5-canvas-wheel-of-fortune/

Three.js Used for rendering 3d content http://blackjk3.github.io/threefab/

BonsaiJS Used for creating svg based graphics http://demos.bonsaijs.org/demos/rainbow/index.html

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HTML5 Canvas element

Tag similar to any other html tag

The contents of the tag is rendered with JavaScript

Context is an object used to render graphics inside the canvas element

The context can be 2d or webgl (3d)

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HTML5 Canvas element Within canvas element you can draw lines, curves, polygons

Line Quadratic curve

Polygon

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http://www.html5canvastutorials.com/labs/html5-canvas-elastic-stars-with-kineticjs/ http://www.html5canvastutorials.com/kineticjs/html5-canvas-kineticjs-brighten-or-darken-image-tutorial/

KineticJs offers the possibility to use build-in 2d elements such as cercles, rectangles, and other shapes . You can make these elements draggable, place them on different layers, apply transformation and styling features like scaling, shadowing etc. When you are working with images, filters are available for inverting colors, grayscaling and other similar effects.

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Multiple possibilities exist for animating elements:

you can apply linear movement, oscillation movement, random direction movement, rotation based on mathematical formulas :

http://www.html5canvastutorials.com/kineticjs/html5-

canvas-all-easing-functions-with-kineticjs/

http://www.html5canvastutorials.com/kineticjs/html5-canvas-kineticjs-animate-position-tutorial/

You have the possibility to make elements move only within the boundaries of delimited area : http://www.html5canvastutorials.com/kineticjs/html5-canvas-drag-and-drop-shapes-horizontally-or-vertically-tutorial/

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Three.js

Three.js is used to render 3d content with renderer object var renderer = new THREE.WebGLRenderer();

3d objects are represented by meshes var plane = new THREE.Mesh(new THREE.PlaneGeometry(300, 300)

Then Meshes are added to the scene scene.add(plane);

Scene is then rendered with camera, orthographic and perspective var camera = new THREE.PerspectiveCamera(45,

window.innerWidth / window.innerHeight, 1, 1000);

http://www.html5canvastutorials.com/three/html5-canvas-webgl-plane-with-three-js/

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Three.js

Different lights are available such as spot light, point light, ambient light etc

You apply different textures and materials to the meshes

var material = new THREE.MeshPhongMaterial({color: 0xe4e4e4});

Very impressive results can be achieved when rendering complex shape object modeled with a 3d modeling program such as Blender.

You can also give to the user the possibility to interact with the scene and modify dynamically the content of the scene.

http://threejs.org/examples/webgl_materials_cubemap_balls_reflection.html

http://carvisualizer.plus360degrees.com/threejs/

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External links

http://bonsaijs.org/

http://raphaeljs.com/

http://mrdoob.github.io/three.js/

http://d3js.org/

http://kineticjs.com/

http://processingjs.org/

http://www.html5canvastutorials.com/

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Find out more

• On https://techblog.betclicgroup.com/

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