.net barcode generator code project Subclassing Game Objects from CCSprite in Objective-C

Create ECC200 in Objective-C Subclassing Game Objects from CCSprite

Subclassing Game Objects from CCSprite
Print Data Matrix 2d Barcode In Objective-C
Using Barcode generator for iPhone Control to generate, create Data Matrix image in iPhone applications.
www.OnBarcode.com
Generate Code 39 Extended In Objective-C
Using Barcode generation for iPhone Control to generate, create Code 39 Extended image in iPhone applications.
www.OnBarcode.com
Very often your game objects will implement logic of their own. It makes sense to create a separate class for each type of game object. This could be your player character, various enemy types, bullets, missiles, platforms, and about everything else that can be individually placed in a game s scene and needs to run logic of its own. The question then is, where to subclass from A lot of developers choose the seemingly obvious route of subclassing CCSprite. I don t think that s a good idea. The relationship of subclassing is a is a relationship. Think closely, is your player character a CCSprite Are all of your enemy characters CCSprites At first the answer seems logical: of course they are sprites! That s what they use to display themselves. But wait a second. Could they be something else other than CCSprite For all I know, game characters can also be characters in the literal sense. In Rogue-like games, your player character is an @. So would that character be a CCLabel then I think the confusion comes from CCSprite being the most widely used class to display anything onscreen. But the true relationship of your game characters to CCNode classes is a has a relationship. Your player class has a CCSprite it uses to display itself. In a Rogue-like game, the player character class has a CCLabel to display itself. And if you want to get fancy, as in OpenGL and lots of particle effects, your player class has a system of particle effects to represent it visually on screen. The distinction becomes even clearer when you think of why you d normally subclass the CCSprite class: in general, to add new features to the CCSprite class for example, to have a CCSprite class that uses a CCRenderTexture to modify how it is displayed based on what is beneath it on the screen.
Data Matrix ECC200 Creator In Objective-C
Using Barcode drawer for iPhone Control to generate, create Data Matrix image in iPhone applications.
www.OnBarcode.com
Encoding Barcode In Objective-C
Using Barcode drawer for iPhone Control to generate, create Barcode image in iPhone applications.
www.OnBarcode.com
CHAPTER 5: Game Building Blocks
Barcode Creation In Objective-C
Using Barcode generation for iPhone Control to generate, create Barcode image in iPhone applications.
www.OnBarcode.com
Paint UPC-A Supplement 5 In Objective-C
Using Barcode printer for iPhone Control to generate, create UPC A image in iPhone applications.
www.OnBarcode.com
What would you add to the CCSprite class if you subclassed it for your player object Input handling, animating the player, collision detection; in general: game logic. None of these things belong to a CCSprite class. You may still be wondering why this has any relevance, or why you should care Consider the case where you want your player to have several visual representations that it should be able to switch to seamlessly. If the player needs to morph from one sprite to another using FadeIn/FadeOut actions, you re going to have to use two sprites. Or if you want your game objects to appear on different parts of the screen at the same time, for example in a game like Asteroids where the Asteroid leaving the top of the screen should also show up partially at the bottom of the screen. You need two sprites to do this, and that s just one reason why composition (or aggregation) is preferable to subclassing (or inheritance). Inheritance causes tight coupling between classes, with changes to parent classes potentially introducing bugs and anomalies in subclasses. The deeper the class hierarchy, the more code will reside in base classes, which amplifies the problem. Another good reason is that a game object encapsulates its visual representation, If the logic is self-contained, only the game object itself should ever change any of the CCNode properties, such as position, scale, rotation, or even running and stopping actions. One of the core problems many game developers face sooner or later is that their game objects are directly manipulated by outside influences. For example, you may inadvertently create situations where the scene s layer, the user interface, and the player object itself all change the player sprite s position. This is undesirable. You want all of the other systems to notify the player object to change its position, giving the player object itself the final say about how to interpret these commands, whether to apply them, modify them, or ignore them.
Code 128 Code Set A Encoder In Objective-C
Using Barcode encoder for iPhone Control to generate, create Code128 image in iPhone applications.
www.OnBarcode.com
Draw UPCE In Objective-C
Using Barcode generation for iPhone Control to generate, create UPC-E image in iPhone applications.
www.OnBarcode.com
Data Matrix 2d Barcode Printer In None
Using Barcode maker for Font Control to generate, create DataMatrix image in Font applications.
www.OnBarcode.com
Generate DataMatrix In Java
Using Barcode encoder for Java Control to generate, create DataMatrix image in Java applications.
www.OnBarcode.com
Recognizing Code 3 Of 9 In Visual Basic .NET
Using Barcode reader for VS .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
ANSI/AIM Code 39 Generation In None
Using Barcode generation for Microsoft Excel Control to generate, create Code-39 image in Office Excel applications.
www.OnBarcode.com
Print Barcode In Visual C#
Using Barcode encoder for VS .NET Control to generate, create Barcode image in Visual Studio .NET applications.
www.OnBarcode.com
Barcode Recognizer In Java
Using Barcode Control SDK for Java Control to generate, create, read, scan barcode image in Java applications.
www.OnBarcode.com
Painting USS-128 In None
Using Barcode creation for Office Word Control to generate, create UCC.EAN - 128 image in Office Word applications.
www.OnBarcode.com
Data Matrix ECC200 Drawer In Java
Using Barcode generation for Java Control to generate, create DataMatrix image in Java applications.
www.OnBarcode.com
Paint UPC Code In VB.NET
Using Barcode creation for .NET Control to generate, create GS1 - 12 image in Visual Studio .NET applications.
www.OnBarcode.com
Barcode Decoder In .NET Framework
Using Barcode Control SDK for ASP.NET Control to generate, create, read, scan barcode image in ASP.NET applications.
www.OnBarcode.com
Recognize QR Code In None
Using Barcode recognizer for Software Control to read, scan read, scan image in Software applications.
www.OnBarcode.com
Generate QR Code JIS X 0510 In C#.NET
Using Barcode encoder for Visual Studio .NET Control to generate, create QR Code ISO/IEC18004 image in VS .NET applications.
www.OnBarcode.com
Copyright © OnBarcode.com . All rights reserved.