Retrieving and using blob size from CCV with AS3

One thing I have been wanting to do for a quite a while now with my touch screen is use touch size data to determine the size of lines drawn on the screen. The other day I finally got around to researching experimenting with CCV. It turns out that CCV can send the width and height of blobs along with coordinates and other data but its not turned on by default and there is no option in the GUI to turn it on.

Here’s a quick demo using a paint brush:

READ MORE

Paint mixing with PixelBender

In my post yesterday I was demonstrating my attempt to create a drawing app using Stage3D for graphics acceleration. As it turns out Stage3D is not built for this kind of ‘per pixel’ manipulation on a drawing canvas. I mentioned at the end of the article that I might explore PixelBender as an alternative for the number crunching. So here it is, my first attempt at building my own Shader in PixelBender for paint mixing.

As you may already know, PixelBender is a a shader language built by Adobe that can be universally used between applications such as Flash Player, Photoshop and After Effects. It is based on the OpenGL Shading Language (GLSL) and is similar to C++. It can be used with Flash to create custom bitmap filters, effects or even to hand off some complex calculations. The great thing about using Pixel Bender is that it runs in a separate thread to Flash Player and can use multiple threads and even multiple cores. So the heavy lifting doesn’t lock up the Flash Player and can run parallel. This makes for some much, much faster processing.

READ MORE

Painting with Stage3D using Starling

I’ve been trying to find ways to improve the performance of paint mixing with Flash and I though I could try using Stage3D for hardware accelerated graphics. But then I realised that Stage 3D is optimised for polygons and 3D models so it was probably not the best solution. I wanted to see if it was possible anyway and thanks to the Starling Framework and a bit of help from Thibault Imberts book it turns out its possible using the RenderTexture on an Image object, but it’s not really possible to do any complex drawing. Starling’s Image object is the equivalent of the Bitmap class, which is using to display any BitmapData. I made an example which you can see below.

By creating a RenderTexture for an Image object, you can use the RenderTexture’s draw() method to draw another Image’s texture onto it. This is similar to using BitmapData and draw() to draw one bitmap onto another.  But Stage3 doesn’t use pixels, it uses textures mapped to triangles instead therefore at this stage  it’s not possible to use something like getPixel() for get colour data from the ‘canvas’.
READ MORE

Spray Paint Stencils in Flash – V2

Well, here we are with version 2 of my Flash spray paint stencils. I’ve been meaning to do a post on this for a while now! This time the paint is rendered much quicker by doing away with an embedded for loop that was in V1. This time instead of looping through each pixel on the canvas, I am drawing using copyPixels utilising an alpha bitmap as an alpha channel and matrices to transform them correctly based on the scale, rotation and position of the stencil movieclip. Another cool feature I added was a ‘muck’ layer on the stencil. Now paint that was on top of the stencil stays on the stencil – just like in real life!

READ MORE

Experiences with Flash, AIR and iOS

Well I’ve been pretty busy latey and not much has happened on here for over month. I decided I should post some work and experiments I have been doing with building iOS apps with AIR for iOS. So below is a series of video demos of some experiments and actual projects I have been doing recently. All apps were compiled using Flash CS5. Note that none of these apps are available in the public app store.

Adventure Golf

Adventure Golf is a simple mini golf game I worked on for a client last year which was written in AS2. I decided to see how easy it was to build existing games for iOS so I converted all the AS2 to AS3 with minimal code changes/optimisations and Published for iOS. All graphics are pulled from the Flash library, with levels laid out on the stage on different frames. The hardest thing I had to do was resize the stage. Everything else just worked and I was surprised at how well it did considering it was converted from old AS2 code. I would like build this into a full app one day when I have lots of spare time!

READ MORE

Leveraging iOS hardware via the browser with Javascript

Just another quick post tonight. I have bigger one lined up for tomorrow I promise. I just wanted to show a little experiment I did a while back with JavaScript – accessing the Accelerometer and Compass data in Safari on the iPad. Below is a short video demonstrating it if you don’t have access to an iPad. If you do have one – visit the link following the video. I might also mention that the arrow/circle image was all created using CSS3 too!

And here’s the link to the demo.

To get the source – just go to the above link and right click > view source.

Creating a HTML version of this blog’s header

Update: this post was made when I was using a different blog design. Please view the original swf file here.

Below is a little experiment I did which involved creating a version of this blog’s image flipping Flickr feed header (which I made in Flash) – in HTML/CSS/Javascript.

Luckily jQuery includes a JSON parsing feature and Flickr provides a JSON feed and so it was very easy to get the Flickr feed. The image flipping was done with CSS3’s 3D transforms and so unfortunately it will only work in Chrome and Safari. Now I just need to work out how to get more than 20 images from the Flickr feed (I need 36 to fill the header), and turn the images black and white. I found a jQuery plugin that apparently can apply image effects but I haven’t gotten it to work yet.

READ MORE

Falls Creek with a GoPro HD Hero

A couple weeks ago I bought a GoPro HD Here camera. The video below is the first test using the camera mounted to my helmet. I was planning on doing some shots with it mounted to my board but the sticky stuff failed the second I started moving!

I’m pretty happy with the quality of the video, except the waterproof casing kept fogging up in the centre of the lens which rendered a lot of footage unusable. I shot at 1280×720 @ 60FPS. The clips with the tilt shift effect were graded with Magic Bullet Looks and the others just have a simple curves adjustment applied to them.

READ MORE

painty – A simple HTML5 web app for the iPad

As you may know I have been mucking around with HTML5’s canvas element lately. Here is an evolution of the paint mixing example I showed a couple posts back. I decided to turn it into a simple iPad web app. Check out the video below and visit the following URL on an iPad to try it out. I also plan to make it multitouch in the not too distant future!

http://www.purplesquirrels.com.au/blogstuff/canvasdraw/index-touch.html

Video demo:

Javascript and Canvas wet paint mixing

Here is an experiment I did to learn how the HTML5 Canvas tag works. I wanted to know how to manipulate pixels so I attempted to port my AS3 paint mixing to Javascript. I was surprised by the performance although it doesn’t seem to be as fast as the Flash version, and it is definitely a lot more work getting and setting pixels with Javascript and Canvas. Check out the demo below. The brush will lag at higher drawing speeds when the size is large. But it if you don’t draw too fast it works pretty well. So far it seems to work best in Safari.

Supported browsers:

  • Chrome (Only tested in Chrome 12)
  • Safari (Only tested in Safari 5)
  • IE9

Note: Doesn’t work in Firefox and haven’t tried Opera

READ MORE