Tag Archives: collision detection

2D polygonal collision-detection and internal edges

Posted on October 31, 2012 by Paul Firth

Hi and welcome back to my blog! I wanted to share something I’ve recently discovered about the heinous problem of internal edges in 2D polygonal collision detection. It’s not a full-solution, but maybe it will give some other programmers an … Continue reading →

Posted in Collision Detection, Geometry, Polygons, Technical | Tagged , , , | 11 Comments

The physics of rolling

Posted on April 2, 2012 by Paul Firth

Hello and welcome back to my blog! This time I’m going to talk about the physics behind simulating a rolling circle, Super Monkey Ball style but in 2d. The key The key to making this work is understanding how we … Continue reading →

Posted in AS3, Circles, Collision Detection, Geometry, Physics, Technical | Tagged , , , , , | 10 Comments

Fun with convex polygons

Posted on March 29, 2012 by Paul Firth

Hello and welcome back to my blog! I wanted to talk about a couple of elegant ways of working with polygons that I’ve used over the years. Simple convex polygon area I’ve seen a lot of people go through and … Continue reading →

Posted in AS3, Geometry, Graphics, Polygons, Technical | Tagged , , , , , , | 12 Comments

How to make games

Posted on January 6, 2012 by Paul Firth

In this article I’m going to be talking about the process behind actually making, testing and publishing a game. It’s aimed at the absolute beginner but there should be something of interest here for the intermediate level reader as well. … Continue reading →

Posted in AS3, Beginner, learning-to-program, Portals, Self improvement, Stencyl | Tagged , , , , , , | 24 Comments

How to make a 2d platform game – part 2 collision detection

Posted on December 14, 2011 by Paul Firth

Hello and welcome back to my blog! In this series of articles, I’m talking about the technology behind a platform game. If you missed part 1 you can check it out here. The language is actionscript 3.0, but the techniques … Continue reading →

Posted in AS3, Collision Detection, Platform game, Technical | Tagged , , , , , , , , , | 26 Comments

How to make Angry Birds – part 1

Posted on May 12, 2011 by Paul Firth

Hello and welcome back to my blog! This time I’m going to try something new. There are many tutorials for various techniques and tricks on the web, but what you don’t often see is one that takes you through the … Continue reading →

Posted in Making angry birds, Technical | Tagged , , , , | 84 Comments

Collision detection for dummies

Posted on April 20, 2011 by Paul Firth

Hello and welcome back to my blog! This article is a kind of companion article to Physics engines for dummies and talks about the act of actually detecting a collision between two shapes. This article assumes the reader has a … Continue reading →

Posted in AS3, Collision Detection, Geometry, Physics, Technical | Tagged , , , , , , | 93 Comments