Create A Space Shooter Game | Egretia Engine Tutorial For Beginners Part 7

This is the seventh part of Egretia Engine tutorial, showing how to build a space shooter game!

Demonstration

> Implementation of RES resources loading

Main

>Implementation of Resources loading

Main

public menu:MainMenu;
public canvasIndex:number; // Interface index

Construct：

this.game= null;

this.addChild(this.menu);

this.canvasIndex=10; //10menu 20game 30over

Main

Add the following codes to touchdown,touchMove,touchup and update：

switch(this.canvasIndex)

{

case 10:

this.menu.touchDown(e);

break;

case 20:

this.game.touchDown(e);

break;

}

public loadingView;

private async loadResource() {

try {

this.loadingView = new LoadingUI();

this.stage.addChild(this.loadingView);

await RES.loadConfig(“resource/default.res.json”, “resource/”);

//menu belongs to the name of group and its background is saved in its group

await RES.loadGroup(“menu”, 0, this.loadingView); this.stage.removeChild(this.loadingView);

}

catch (e) {

console.error(e);

}

Mainmenu

public async touchDown(e:egret.TouchEvent)

{

//=null means there are no constructor or no resources loading. Then the interface starts to load

if(this.main.game == null){ // add the loading interface to the scene

this.stage.addChild(this.main.loadingView);

//read the resources

await RES.loadGroup(“game”, 0, this.main.loadingView);

//remove the interface

this.stage.removeChild(this.main.loadingView);

//construct the game interface after loading

this.main.game = new MainGame(this.main);

}

this.main.removeChild(this);

this.main.game.reset(0); // 0 is the game level

this.main.addChild(this.main.game);

this.main.canvasIndex = 20;

}

Loading

// add the loading interface to scene
this.stage.addChild(this.main.loadingView);
//read the resources
await RES.loadGroup(“game”, 0, this.main.loadingView);
//remove the interface
this.stage.removeChild(this.main.loadingView);

>Add the images in interfaces

Create LoadingUI2

Main

loadResource()

this.loadingView = new LoadingUI2();

MainMenu

> Singleton Pattern and Create JSON

An implementation of the singleton pattern must:

ensure that only one instance of the singleton class ever exists;

and provide global access to that instance.

JSON is an open standard file format, and data interchange format, that uses human-readable text to store and transmit data objects consisting of attribute–value pairs and array data types (or any other serializable value). It is a language-independent data format and a very common data format, with a diverse range of applications.

> Basic concepts of game design and game development：Separate data and logic

{
“playV”: 30, ”:”player’s speed”,
“zdV”: 10, ” :” Bullet rotational speed”
}

Create JSON file and import resources

What are the coolest projects you saw from people using Egretia engine?

Stay tuned for updates from the Egretia official channels below so that you can be involved in all the exciting things to come!

Egretia Telegram: https://t.me/Egretia

Egretia Twitter: https://twitter.com/Egretia_io

Egretia Website: https://egretia.io/