[Share] My extension of PIXI for Lighting.

My extension is inspired by https://github.com/pixijs/pixi-lights. But it’s not simple port of old pixi-lights, it’s re-designed.

The differences :

• Better performance (just a bit little)
• A new renderer named LightSpriteRenderer, don’t change WebGLRenderer & SpriteRenderer
• Light is not the subclass of DisplayObject, it’s just a normal Class.
• attribute lights on sprite, don’t need to add a light object to the stage/container. Now, you could set different lights on different sprites in the same stage.
• AmbientLight is not necessary, you could use ambientColor and ambientLight on PointLight and DirectionalLight. But just use on the first light of lights please.
• support non-light-sprites in correct rendering order. (the old pixi-lights always render non-light sprite on the top).
• use pluginName for using LightSpriteRenderer ( see #3330 )
• add an important feature of pixi-gl-core ( see https://github.com/pixijs/pixi-gl-core/pull/18 )
• DO NOT support Container . Please use LightSpriteRenderer on standalone Sprite with normalTexture.
• … others…

My english is very poor , so , the example is better than my words : http://fattyboy.cn/pixi-lights-v4/

the key files of this feature in my fork version at : ~~https://github.com/finscn/pixi.js/tree/master/src/extension/light~~ [update: new url] : https://github.com/finscn/pixi.js/tree/master/src/extensions/renderers/light

Why don’t use Deferred Lightning ?

I found that Deferred Lightning in 2D game with WebGL won’t help for performance in most cases.

BTW, I’ve stopped to develop Light Filter. If want to implement it ，I have to create a new subclass of Sprite for render normalTexture. That’s so complex.

[finscn]

pixi-layers is an amazing feature , I couldn’t wait for it.

[finscn]

Hi guys , now support deferred-lighting .
When pixi supports gl.bindAttribLocation , I will open a PR for this feature.

@GoodBoyDigital , when will pixi support gl.bindAttribLocation ?

P.S. : I’ve open a PR #3682 for gl.bindAttribLocation. Review please, thank you.