Proton

Javascript particle animation library

Animation

drawcall/Proton drawcall.github.io/Proton/proton-engine

README

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/. The3D version of the proton engine is here https://github.com/drawcall/three.proton/

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

``` sh
npm install proton-engine --save
```

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

OR include in html

``` html
<script type="text/javascript" src="js/proton.min.js"></script>
```

Usage

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

``` js
const proton = new Proton();
const emitter = new Proton.Emitter();
//set Rate
emitter.rate = new Proton.Rate(Proton.getSpan(10, 20), 0.1);
//add Initialize
emitter.addInitialize(new Proton.Radius(1, 12));
emitter.addInitialize(new Proton.Life(2, 4));
emitter.addInitialize(new Proton.Velocity(3, Proton.getSpan(0, 360), "polar"));
//add Behaviour
emitter.addBehaviour(new Proton.Color("ff0000", "random"));
emitter.addBehaviour(new Proton.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 Proton.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 most cases, you don't need to set this property. 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:

``` js
git clone git://github.com/drawcall/Proton.git
...
npm install
npm run build
```

And run example

``` js
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