If Adobe’s recent clusterfuck hasn’t sent you running into the arms of html5 here are some nice resources you might like…
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Following on from part one and two, we now deal with sending messages to specific peers in a large group (where large means 15+ members).
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Following on from part 1, i have adapted the code to to enable message sending to specific peers (or in p2p jargon, direct routing). I have added a label to display the instances’ (truncated) ID and a dropdown list to select the recipient of the message:
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Flash Player has provided an API for peer-to-peer communication since 10.1 (and in AIR since 2.0). P2P over the Internet requires some server-side technology (such as Flash Media Server) but on a local network it’s really easy; no server stuff and it can be set up in a few lines of code.
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In parts one and two, i dealt with specific JavaScript libraries but this time i will cover general communication between Flash and JavaScript. Namely, calling Flash methods from JavaScript and JavaScript methods from Flash.
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SWFAddress is a JavaScript and ActionScript library for adding deep-linking functionality to Flash websites; allowing users to navigate using the browser back and next buttons in the same way as an HTML website. It’s dead easy to use so let’s dive in…
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As fantastic as Flash is, it can’t do everything; sometimes we need to use other technologies to get results. For Flash running in a browser, JavaScript is a useful (and sometimes essential) tool.
I categorise my use of JavaScript into three areas: 1. Essential: embedding Flash in HTML (and providing alternative content), 2. Semi-essential: deep-linking (using browser back/next buttons for Flash navigation) and 3. Optional: everything else. I will cover 2 & 3 in later posts, but first…
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I’ve noticed that this question pops up from time to time on forums, and it’s very straight-forward to do; we can use the draw() method of BitmapData to copy any visual element (in this case, the stage itself) into a BitmapData object. Then we can use the getPixel() method to extract the colour.
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For the un-initiated, Bezier Curves are curves defined by a set of (at least 2) points in space (usually defined by x and y coordinates). By setting appropriate sets of points, complex curving paths can easily be defined. These could be simply drawn to the screen or used as paths for visual objects (eg a game character) to follow.
The simplest case is a curve defined by 2 points – which is just a straight line. As more points are added the curvature can become more complex. The curveTo method of the Graphics class uses a Bezier Curve of 3 points (1 point defined by the current drawing position and 2 points passed into the method).
So, if we want to draw a 2 or 3 point Bezier Curve, Flash can do the work for us, but for 4 points or more we need to handle it ourselves. Also, if we are using a Bezier Curve as a path for an object to follow, we need to know the coordinates at all positions along the path and the drawing methods of Flash wont help us with that.
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If you’ve read part 1, you already know how to generate sound – just pass some values into a ByteArray when a SampleDataEvent event fires – so now let’s see what kind of noises we can make.
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