proton-engine

---

Proton is a lightweight and powerful Javascript particle animation library. Use it to easily create a variety of cool particle effects.

Check out examples at http://drawcall.github.io/Proton/. The 3D version of the proton engine is here here. An available react version is here.

Features

- Easy to use It takes only a dozen lines of code to create a particle animation effect.
- Multiple effects Use Proton to create flames, fireworks, bullets, explosions, and more.
- Any scene You can use it in frameworks such as react, vue, angular, and pixi.js, Phaser, etc.
- Efficient rendering Its rendering efficiency is very high, you can render tens of thousands of particles in the page.
- Simulated physics Proton can simulate various physical properties including gravity and Brownian motion.
- Several renderers Proton provides a variety of renderers, of course you can also customize your own renderer
- CanvasRenderer - Proton's canvas renderer
- DomRenderer - Proton's dom renderer, supporting hardware acceleration.
- WebGLRenderer - Proton's webgl renderer.
- PixelRenderer - Proton's pixel renderer, It can implement pixel animation.
- EaselRenderer - Easeljs proton renderer.
- EaselRenderer - Pixi.js proton renderer.
- CustomRenderer - Use a custom renderer that can be applied to any scene.

Documentation

See detailed documentation please visit https://projects.jpeer.at/proton/.
Thank you very much @matsu7089 for writing a good tutorial.

Installation

#### Install using npm

> Note: NPM package-name has been changed from proton-js to proton-engine

``shell
npm install proton-engine --save
`

`javascript
import Proton from "proton-engine";
`

#### OR include in html

`html

`

Usage

Proton is very simple to use, a dozen lines of code can create a particle animation.

`javascript
import Proton, {
Emitter,
Rate,
Span,
Radius,
Life,
Velocity,
Color,
Alpha,
CanvasRenderer,
} from "proton-engine";

const proton = new Proton();
const emitter = new Emitter();

//set Rate
emitter.rate = new Rate(new Span(10, 20), 0.1);

//add Initialize
emitter.addInitialize(new Radius(1, 12));
emitter.addInitialize(new Life(2, 4));
emitter.addInitialize(new Velocity(3, new Span(0, 360), "polar"));

//add Behaviour
emitter.addBehaviour(new Color("ff0000", "random"));
emitter.addBehaviour(new Alpha(1, 0));

//set emitter position
emitter.p.x = canvas.width / 2;
emitter.p.y = canvas.height / 2;
emitter.emit(5);

//add emitter to the proton
proton.addEmitter(emitter);

// add canvas renderer
const renderer = new CanvasRenderer(canvas);
proton.addRenderer(renderer);
`

Remarks

- Proton.Span (or Proton.getSpan) is a very important concept of the Proton engine, it's everywhere. If you understand its usage, you can create almost any desired effect!

- If you want to create wind, rain, or snow, etc, you can use the emitter.preEmit method to pre-render the scene.

- Use Proton.Body and Proton.Color at the same time. I suggest you'd better use the WebGLRenderer not CanvasRenderer.

- Added Proton.Cyclone behavior, you can make vortex effects with Cyclone. Demo please check here.

- proton.fps In modern browsers, if the FPS exceeds 60 and you want to maintain a stable 60 FPS, you need to set proton.fps = 60. You can set this property when the game engine has fixed fps or some browsers have a higher refresh rate.

- Use Euler integration calculation is more accurate (default false) Proton.USE_CLOCK = false or true;.

Proton has now been upgraded to the v4 version. Performance has been greatly improved and api also has some improvements. For more details, please check here.

Building

node is a dependency, use terminal to install it with:

`javascript
git clone git://github.com/drawcall/Proton.git

...
npm install
npm run build
`

And run example

`javascript
npm start
//vist http://localhost:3001/example/
``

Changelog

Detailed changes for each release are documented in the release notes.

License

Proton is released under the MIT License. http://www.opensource.org/licenses/mit-license