[SOLVED] Engine source entry point

velbi · April 20, 2020, 8:36am

Hello, everyone

I am looking at engine source as first time
I just checked core.js and application.js files

But, I can’t find entry point… where is entry point? and how to know entry point of engine source
As beginner of javascript, I just curious…

Leonidas · April 20, 2020, 8:39am

Hi @velbi,

That’s a valid question, the entry point of any Playcanvas app is the constructor of the pc.Application class. When a new instance of that class is being instantiated that’s where the code starts executing:

github.com

playcanvas/engine/blob/master/src/framework/application.js#L27


*     // Every script instance has a property 'this.app' accessible in the initialize...
*     var app = this.app;
* };
*
* MyScript.prototype.update = function(dt) {
*     // ...and update functions.
*     var app = this.app;
* };
* ```
*
* If you are using the Engine without the Editor, you have to create the application
* instance manually.
* @description Create a new Application.
* @param {Element} canvas - The canvas element.
* @param {object} options
* @param {pc.ElementInput} [options.elementInput] - Input handler for {@link pc.ElementComponent}s.
* @param {pc.Keyboard} [options.keyboard] - Keyboard handler for input.
* @param {pc.Mouse} [options.mouse] - Mouse handler for input.
* @param {pc.TouchDevice} [options.touch] - TouchDevice handler for input.
* @param {pc.GamePads} [options.gamepads] - Gamepad handler for input.
* @param {string} [options.scriptPrefix] - Prefix to apply to script urls before loading.

For Playcanvas editor projects there is a launcher app in addition, spawning an instance of that class together with a loader. You can check that code that by downloading a build of any Playcanvas project.

velbi · April 20, 2020, 9:36am

Thank you @Leonidas !