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Find my current blog at http://www.storminthecastle.com
Stormin' The Castle
A Software and Technology Blog by John Robinson
Latest posts
Adjusting Image Brightness and Color Using the HTML5 Canvas API
Ever needed to adjust the brightness of an image? Or maybe you’d like to make an image feel warmer by increasing it’s red channel? As a followup to my earlier articles, “How You Can Do Cool Image Effects Using HTML5 … Read more »
Essential Canvas For HTML5 Now Available in Alpha
You’d Love to Draw and Animate using the HTML5 Canvas API. Maybe you want to be able to write an HTML5 game? Or maybe you want to add image editing to your latest web app? Or maybe you’ve just heard … Read more »
Use Node.js to Extract Data from the Web for Fun and Profit
Need to automate pulling some data from a web page? Or want to mash up some unstructured data from a blog post with another data source. No API for getting at the data… !@#$@#$… No Problem… Web scraping to the … Read more »
How You Can Draw Regular Polygons with the HTML5 Canvas API
So maybe you need to draw a pentagon? or a hexagon? How about just a simple equilateral triangle? Any of those seemingly basic primitive regular polygons that you learned about back in geometry class. The Canvas API is extremely powerful … Read more »
goo.js – The HTML5 Canvas API Simplified
Check out my new Javascript library, goo.js. Goo.js is a microlibrary intended to make it easy to draw and handle mouse and keyboard events with the HTML5 canvas library. Help out by contributing on GitHub. Easy fullscreen canvas apps with … Read more »
Introduction to HTML5 Canvas
Maybe you’ve heard of the HTML 5 Canvas API, but don’t know what it’s good for…? Maybe you’ve heard that it’s the way to go if you want to code an HTML5 game? Or maybe you’ve heard that it gives … Read more »
Complex Animations Using HTML5 Canvas
In my upcoming ebook, “Essential Canvas for HTML5“, you’ll not only learn the basics of animation but you’ll also learn how to do complex Flash-like animations using HTML5 and Javascript that impart dynamics through tweening and other advanced techniques. I’ll … Read more »
How You Can Build an HTML5 Photobooth App
You want the users of your web app to be able to use their webcam to take their own profile shots and you’d like them to be able to personalize or stylize the picture before uploading it your weberver. Or … Read more »
Make Your UI More Responsive with HTML5 Web Workers
Argh!!… Your web application has to sort a lot of data and you get the dreaded error message… “A script on this page may be busy, or it may have stopped responding…” Or maybe you’re writing some image processing code … Read more »