Welcome to Basix, our area for beginners. If you're just learning the ropes, or find many of our intermediate and advanced tutorials too challenging, the tutorials and articles here have been selected just for you.
In this Quick Tip, we’ll discuss the confusing AS3 error 1203, “no constructor found”, which crops up without provocation and is rather unfortunately worded. We’ll examine the scenario in which it will appear, and how to fix it.
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In the previous Quick Tips, we’ve looked at collision detection: essentially, detecting that two shapes have overlapped. Now, we’re ready to look at collision reaction: making something happen due to a collision. In this Quick Tip, we’ll look at the reactions of reflection and sliding.
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We covered collision detection between an infinite line and circle in our previous Quick Tip. However, the issue that arose was that the line extends further than the visible line segment; in fact, it extends into a hyperplane. In this Quick Tip, we shall limit our collision detection to that of a line segment only.
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In my previous Quick Tip, we looked at the idea of collision detection in general, and specifically at detecting collisions between a pair of circles. In this Quick Tip, we’ll look at detecting a collision between a circle and a line.
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Collision detection is a branch of algorithms that checks whether two shapes overlap. If you build physics or action games with ActionScript, you will certainly not escape acquaintance with this topic. This is the first of the series regarding collision detection. In this Quick Tip, we shall look at ActionScript’s built-in collision detection method, hitTestObject(), and write our own to detect overlap between two circles.
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So far, we’ve got a never-ending stream of enemies that our avatar must avoid; one touch, and it’s game over. But so what? Since there’s no way to track the player’s progress, they have no idea whether they did better in their latest round than they ever did before. In this tutorial, you’ll learn how to keep score, how to display it on the canvas, and how to let the player know when they’ve beaten their own records.
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A very common ActionScript error is Error 1120, the “undefined property” error. In fact, this may be the most common compile-time error. Its cause is very simple, but there are a number of ways it can actually be induced. We’ll take a quick tour of some of the scenarios in which you’ll encounter this error, and how to fix them.
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In the first part of this series, you learned the basics of using JavaScript and the canvas element to make a very simple HTML5 avoider game. But it’s too simple – the single enemy doesn’t even move – there’s no challenge! In this tutorial, you’ll learn how to create a never-ending stream of enemies, all falling from the top of the screen.
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Twice a month, we revisit some of our readers’ favorite posts from throughout the history of Activetuts+. This week’s retro-Active tutorial, first published in October 2010, is an introduction to object-oriented programming in AS3. Don’t forget to check out the other AS3 101 tutorials!
Object-Oriented Programming is a bit of a hot topic. More and more programming languages are cropping up that support it (Ruby, for example), and more and more languages that previously didn’t support Object-Oriented Programming (OOP for short) have been released with versions that do, like PHP and ActionScript. Some languages only work if you utilize the whole OOP thing to begin with, like Java and Objective-C.
It’s actually been around for a long time, but came into the limelight in the 1990′s primarily due to its advantages with programming GUIs and the rise of C++ and Objective-C. Wikipedia has an interesting section on the history of OOP, which is a great place to start learning.
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In this tutorial I will introduce a class by Senocular.com that allows easy movement of game characters with minimal code.
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Follow Activetuts+ editor Michael James Williams as he walks you through integrating Flash with Facebook! Learn to develop apps for the Facebook website and harness the Graph API in your external projects.
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