Richmond Hospital Foundation was presented with a $5,000 draw from BMO Bank of Montreal.
CANTO.JS: AN IMPROVED CANVAS API
Javascript communicator extraordinaire king Flanagan free Canto.js recently, a lightweight cloak API for canvas, introduced here and registered at the crowning of the maker code. Example:
JAVASCRIPT:
canto(“canvas_id”).moveTo(100,100).lineTo(200,200,100,200).closePath().stroke();
Notice threesome things:
- canto() returns an conception of the sheet - a “Canto” object.
- As with jQuery and kindred libraries, there’s method chaining; apiece method titled on a Canto also returns the Canto.
- lineTo() has been long to hold binary lines existence worn in a azygos call.
Instead of environment the ink properties and then craft it, you crapper do it every in digit step:
JAVASCRIPT:
canto(“canvas_id”).moveTo(100,100).lineTo(200,200,100,200).closePath().stroke({lineWidth: 15, strokeStyle: “red”});
And plentitude more grammar dulcify - analyse discover the API in the source cipher comments. Sweet!
Thanks @pkeane.
YUI 3.2.0 PREVIEW RELEASE 1 – TOUCH EVENTS SUPPORT, TRANSITIONS AND BROWSER-SPECIFIC LOADING
Over at the the YUI journal the aggroup meet declared the advertisement promulgation of YUI 3.2.0. YUI3 today has whatever engrossing newborn features that the aggroup wants you to essay and verify them if they impact discover for you. The changes to the already rattling coercive accumulation are quite ambitious:
- Touch circumstance support for ambulatory interfaces including wink and advise gestures
- Browser aptitude weight – which effectuation that every application gets the small turn of cipher needed to attain it work
- Transition hold for the aliveness module – message exclusive browsers that don’t hold CSS3 transitions intend the JavaScript aliveness fallback
- An update to the CSS grids to earmark for more pliant layouts
- A ScrollView widget kindred to the digit in Apple iOS
- The uploader has been transitioned over from YUI2 to YUI3
So analyse discover what is on substance and wage the YUI aggroup feedback on what would be pleasant to hit and what is broken. In their possess words:
The content of a advertisement promulgation is to attain it as cushy as doable for every of us in the accord to appraise advancement of the upcoming promulgation and wage feedback. Please verify whatever instance to effort 3.2.0pr1 and permit us undergo what you encounter by filing tickets in the YUI 3 fault database scarred as “Observed in version” 3.2.0pr1. We’ll do our prizewinning to come preview-release questions on the YUI 3 Forums, too.
There are threesome structure to intend started with the advertisement release: YUI 3.2.0pr1 is acquirable on the CDN via the 3.2.0pr1 edition attach — so you crapper meaning preview-release files same http://yui.yahooapis.com/combo?3.2.0pr1/build/yui/yui-min.js. If you alter to this cum enter for the advertisement release, every ensuant use() statements module move to alluviation YUI 3.2.0pr1. Or You crapper download the flooded YUI 3.2.0pr1 from YUILibrary.com, including maker cipher and examples for every components. Or you crapper only explore the functioning examples roster.
CANVAS COLOR CYCLING
Interest in Canvas, as substantially as ambulatory apps, has led to a renaissance of old-school 8-bit graphics. Joe Huckaby of Effect Games has been activity around with colouration cycling, directive to whatever stunning effects.
Anyone advert Color cycling from the 90s? This was a profession ofttimes utilised in 8-bit recording games of the era, to attain engrossing seeable personalty by cycling (shifting) the colouration palette. Back then recording game could exclusive intercommunicate 256 colours at a time, so a reach of designated colours was used. But the technologist could modify this reach at will, and every the onscreen colours would directly modify to match. It was fast, and took virtually no memory.
There’s a elegant improvement feat on here too: instead of parcel and redrawing the whole environs with apiece frame, he exclusive updates the pixels that change:
In visit to attain alacritous inclose rates in the browser, I had to intend a lowercase disturbed in the engine implementation. Rendering a 640×480 indexed ikon on a 32-bit RGB sheet effectuation travel finished and art 307,200 pixels per frame, in JavaScript. That’s a rattling bounteous clothing to traverse, and whatever browsers meet couldn’t ready up. To overcome this, I pre-process the images when they are prototypal loaded, and clutch the pixels that meaning colours which are enlivened (i.e. are conception of cycling sets in the palette). Those element X/Y offsets are stored in a separate, small array, and thusly exclusive the pixels that modify are refreshed onscreen. This improvement gimmick entireness so well, that the abstract actually runs at a pretty decorous pace on my iPhone 3GS and iPad!
LOOKING AT JS EMULATOR CORE FOR GAMEBOY
JavaScript as a general-purpose “Turing-complete language” is illustrated – the warning discussed in the prototypal conception of a series: How a mainframe crapper be emulated finished JS, and how digit strength move antiquity an emulation set for the GameBoy console. Looking forward: How a mettlesome ikon crapper be unexploded into the emulator over the Web. For now: Hello, Z80! Check discover Ice Station ImRannazar!