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A renderer agnostic two-dimensional drawing api for the web.

jonobr1.github.com/two.js

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two.js

A two-dimensional drawing api meant for modern browsers. It is renderer agnostic enabling the same api to render in multiple contexts: webgl, canvas2d, and svg.

Home • Examples • Documentation • Help

Usage

Download the minified library and include it in your html. Alternatively see how to build the library yourself.

<script src="js/two.min.js"></script>

Here is boilerplate html in order to draw a spinning rectangle in two.js:

<!doctype html>
<html>
  <head>
    <script src="js/two.min.js"></script>
  </head>
  <body>
    <script>
      var two = new Two({
        fullscreen: true,
        autostart: true
      }).appendTo(document.body);
      var rect = two.makeRectangle(two.width / 2, two.height / 2, 50 ,50);
      two.bind('update', function() {
        rect.rotation += 0.001;
      });
    </script>
  </body>
</html>

Custom Build

Two.js uses nodejs in order to build source files. You'll first want to install that. Next you'll want to install grunt:

cd two.js
npm install grunt

You can edit the files that we be included in the build by modifying ./Gruntfile.js. If you're making an application and you're only using one renderer (i.e: svg context) then it is highly recommended to remove canvas and webgl renderers from your build in order to drastically decrease your file size.

Finally, build the project:

grunt

If you are having problems running the closure compiler (it requires a JDK to be installed), run

grunt build-uglify

instead to minify the build with uglify.

Change Log

Nightly
  • Two.interpret decomposes transform attribute of source tag
  • Two.interpret handles item irregularities from Inkscape
  • Changed Two.Identifier to use underscores instead of hyphens for dot-notation access Leo Koppelkamm
  • Added Two.Group.getById and Two.Group.getByClassName methods for convenient selection Leo Koppelkamm
  • Added classList to all Two.Shapes Leo Koppelkamm
  • Enabled inference of applied styles on imported svgs Leo Koppelkamm
  • Added Two.Polygon.getPointAt method to get coordinates on a curve/line
  • Added Two.Polygon.length property and Two.Polygon._updateLength method to calculate length of curve/line
  • Updated Two.Group.prototype observable properties on Two.Polygon.Properties to ensure each property is considered unique
  • Two.Polygon.vertices first and last vertex create automated control points when Two.Polygon.curved = true
  • Updated Two.Polygon.subdivide method to accomodate Two.makeEllipse
  • Enabled id to be properly interpreted from SVG elements @chrisdelbuck
  • Updated webgl renderer getBoundingClientRect to accommodate relative anchors
  • Updated beginning and ending to clamp to each other
  • Reorganized Two.Polygon._update and Two.Polygon.plot in order to handle beginning and ending properties
  • Updated Two.getComputedMatrix and Two.Polygon.getBoundingClientRect to adhere to nested transformations
  • Updated Two.Anchor to change control points relatively by default through anchor.relative property
  • Updated Two.Polygon.subdivide method to accomodate curved = false circumstances
  • Updated svg, canvas, and webgl renderers to properly reflect holes in curved Two.Polygons
  • Updated Two.Group clone method
  • Added toObject method to Two.Group, Two.Polygon, Two.Anchor
  • Two.Polygon initializes polygon.cap = 'butt' and polygon.join = 'miter' based on Adobe Illustrator defaults
  • Two.Polygon.subdivide method now works with Two.Commands.move for noncontiguous polygons
  • Internally update matrices on getBoundingClientRect in order to remove the need to defer or wait for internal variables to be up-to-date
  • Refactor of renderers and scenegraph for performance optimization and lower memory footprint
    • Relinquished internal events for flags
    • Prototypical declaration of Object.defineProperty
    • Added _update and flagReset methods to Two.Shape, Two.Group, and Two.Polygon
    • Decoupled canvas and webgl renderers and are now independent
    • Added _matrix.manual to override the default behavior of a Two.Polygon transformation
    • Localized variables per file as much as possible to reduce Garbage Collection on runtime
October 25, 2013 v0.3.0
  • Can properly pass domElement on construction of new instance of two
  • Added overdraw boolean to webgl renderer @arodic
  • Added support for ie9 svg interpretation @tomconroy
  • Added subdivide method for Two.Polygon and Two.Group
  • Ensure sure that manual properly is set on construction of Two.Polygon that it binds Two.Anchor.controls change events
  • Added automatic High DPI support for webgl renderer
  • Updated two.interpret(svg) to handle compound paths
  • Added Two.Anchor which represents all anchor points drawn in two.js
  • Modified source to not have any instances of window for node use
  • Updated to underscore.js 1.5.1
  • Added Two.Utils.getReflection method to properly get reflection's in svg interpretation
  • Made Two.Vector inherently not broadcast events and now needs to be explicity bound to in order to broadcast events, which two.js does internally for you
  • Created Two.Utils.Collection an observable array-like class that polygon.vertices inherit @fchasen
  • Added Two.Events.insert and Two.Events.remove for use with Two.Utils.Collection
  • Properly recurses getBoundingClientRect for both Two.Group and Two.Polygon
  • Added Two.Version to clarify forthcoming builds
  • Updated hierarchy ordering of group.children in canvas and webgl renderers
  • Updated shallow and bidirectional remove method for Two.Group and Two.Polygon
  • Added corner method to Two.Group and Two.Polygon allowing anchoring along the upper lefthand corner of the form
  • Modified center method of Two.Group and Two.Polygon to not affect the translation property to stay inline with corner method and any future orientation and anchoring logic
  • Added automatic High DPI support for canvas renderer
  • Added overdraw boolean to canvas renderer
  • Added AMD loader compatibility @thomasrudin
  • Deferred two.update(); to account for canvas and webgl
  • Added remove and clear methods to two instance
  • Updated svg interpretation for webgl context
  • Added matrix property to all Two.Shape's for advanced transformations
  • Added inverse method to Two.Matrix
  • Remove execution path dependency on utils/build.js @masonbiler
  • Added timeDelta property to every two instance
  • Added gruntfile, package.json for more integration with npm, and dependency free build (build/two.clean.js) @iros
  • Crossbrowser compatibility with noStroke and noFill commands
May 3, 2013 v0.2.0
  • First alpha release
Jan 29, 2013 v0.1.0-alpha
  • Proof of Concept built from Three.js

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A renderer agnostic two-dimensional drawing api for the web.

jonobr1.github.com/two.js

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