Javascript 将Pixijs v3 AbstractFilter转换为v4 Filter

我正在尝试将Pixi v3的自定义着色器转换为v4

原文如下：

这里关联的代码笔

到目前为止，我得到了这个：

function CustomFilter(fragmentSource) {
  PIXI.Filter.call(this,
      null,
      fragmentSource
  );
}
CustomFilter.prototype = Object.create(PIXI.Filter.prototype);
CustomFilter.prototype.constructor = CustomFilter;

// smoke shader
var shaderCode = document.getElementById('fragShader').innerHTML
var smokeShader = new CustomFilter(shaderCode);    
smokeShader.uniforms.resolution[0] = width;
smokeShader.uniforms.resolution[1] = height;
smokeShader.uniforms.alpha = 1.0;
smokeShader.uniforms.shift = 1.6;
smokeShader.uniforms.time = 0;
smokeShader.uniforms.speed[0] = 0.7;
smokeShader.uniforms.speed[1] = 0.4;

var bg = PIXI.Sprite.fromImage("pixi_v3_github-pad.png");
bg.width = width;
bg.height = height;
bg.filters = [smokeShader]
stage.addChild(bg);

var logo = PIXI.Sprite.fromImage("pixi_v3_github-pad.png");
logo.x = width / 2;
logo.y = height / 2;
logo.anchor.set(0.5);
logo.blendMode = PIXI.BLEND_MODES.ADD;
stage.addChild(logo)

var count = 0

animate()

function animate() {
  requestAnimationFrame(animate);

  count += 0.01
  smokeShader.uniforms.time = count;

  renderer.render(stage);
}

Edge运行良好

Chrome抛出一个错误

pixi.min.js:13 Uncaught TypeError: Cannot read property 'value' of undefined
    at e.syncUniforms (pixi.min.js:13)
    at e.applyFilter (pixi.min.js:13)
    at CustomFilter.t.apply (pixi.min.js:13)
    at e.popFilter (pixi.min.js:13)
    at e.renderAdvancedWebGL (pixi.min.js:10)
    at e.renderWebGL (pixi.min.js:10)
    at e.renderWebGL (pixi.min.js:10)
    at e.render (pixi.min.js:13)
    at animate (shader-v4.html:123)
    at shader-v4.html:113

FireFox抛出错误，然后导致计算机崩溃

t.uniforms.data[u] is undefined

有人知道哪里出了问题，怎么解决吗

TIA

变量

uniform float alpha

未使用，因此可能在编译着色器时进行了优化。然而，CustomFilter似乎忽视了这一事实

从代码中删除“alpha”可以解决问题，而注释掉则不行。大概是对着色器源进行了“无声”的制服和属性分析——不考虑注释

我相信Pixi现在使用glsify，所以看起来glsify可能有一个缺点