PHP Flyweight Mode Usage Example

When we play, we will find that because there are only three races in the interstellar race, there are only dozens of units in the class.

Although the remaining blood of each individual soldier is different, the image animation of the same class is the same, even if different players are just different colors. For example, the crew of a human race.

And most players use only some of the most common classes, and often don't make all of them.

To solve the problem: the image of the class to share the animation.

Idea: We put the image animation of each class as an object and put it into memory sharing. Once a picture is used in this class, just take the shared image animation out and change the color.

Example of the Flyweight mode:

The code is as follows

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<?php Machine Gun soldier Henry Yuan Class Marineflyweight { Draw the image animation of the machine-gun, the parameter is the state, such as which player belongs to Public Function Drawmarine ($state) { Draw the Machine-gun soldier } } Enjoy Yuan Factory Class Flyweightfactory { An array of privileges for storing multiple entities Private $flyweights; Ways to get the privilege Public Function Getflyweight ($name) { if (!isset ($flyweights [$name])) { $flyweights [$name] = new $name. " Flyweight "; } return $flyweights [$name]; } } Initial Privilege Factory $flyweightFactory = new Flyweightfactory (); When we need to draw a machine-gun, pass an array of states, which contains the rest of the blood, and so on. $marine = $flyweightFactory->getflyweight ("Marine"); $marine->drawmarine ($status); ?>

Usage Summary: The META mode can centralize the resources that need to be shared, manage them uniformly, and prevent repetitive consumption.

Implementation Summary: Need an exclusive plant to manage shared resources, such as the flyweightfactory above. The production of all the shared resources is given to the exclusive factory.