Articles on Flash, Shockwave, webgames and web development. http://www.johanvanmol.org Wed, 08 Sep 2010 17:45:12 +0100 FeedCreator 1.7.2 http://www.johanvanmol.org/index.php?option=com_content&task=view&id=25&Itemid=0 Welcome to the old personal site of Johan van Mol. Over the last couple of years my career has taken a turn. I stopped flash and web development and moved to a management position. I leave a number of popular articles online. My new blog can be found at www.buckminster.be (http://www.buckminster.be) http://www.johanvanmol.org/index.php?option=com_content&task=view&id=34&Itemid=37 I was tired of finding myself utf8_encode()'ing and utf8-decode()'ing all over the place when dealing with multi-lingual Flash and HTML sites. My solution is the Unicode Workflow, a big word for a couple of simple rules which will save you a lot of headaches. http://www.johanvanmol.org/index.php?option=com_content&task=view&id=45&Itemid=37 This is the third article on collision detection and bouncing in Flash. This article will explain how collision works between a light object and a much heavier object, such as a ball and a wall. In this case the collision response is quite simple because the heavy object is not affected by the collision.This article builds on the algortihms explained in the first (http://www.johanvanmol.org/content/view/39/37/) and second (http://www.johanvanmol.org/content/view/41/37/) article. http://www.johanvanmol.org/index.php?option=com_content&task=view&id=41&Itemid=37 At a jiu-jitsu seminar I asked a Japanese grandmaster which was the preferred way to do a certain wrist lock. He answered: Life has many ways, choose one . The same wisdom applies to collision detection. There are many ways to implement the intersection-of-line-segments-formula I explained in the first article (http://www.johanvanmol.org/content/view/39/37/). In this article we'll explore some algorithms in Flash to detect collisions of a moving circle or polygon enclosed by another polygon. http://www.johanvanmol.org/index.php?option=com_content&task=view&id=39&Itemid=37 This is the first article in a series about collision detection and bouncing in Flash. Before we get to the real stuff, we need some preliminary knowledge: we need to know how to intersect line segments. In this article I'll show two ways to calculate the intersection of line segments. First we'll use the Slope-Intercept form of the lines to find their intersection. The second method uses a parametric equation, which will prove to be more elegant and require less time to compute. Sample code is provided in Flash.