message: lucy_bloom: improve code comments
diff: @@ -132,6 +132,9 @@ Entity createQuad(Engine* engine, Texture* tex, ImageOp op, Texture* secondary)
  return Material::Builder().package(pkg.getData(), pkg.getSize()).build(engine);
  }(*engine);
  + // Compute the "weights" array, which is composed of two consective sequences of 4-tuples:
  + // [WEIGHT, OFFSET_X, OFFSET_Y, DONT_CARE]
  + // The first sequence is for the horizontal pass, the second sequence is for the vertical pass.
  static const float4* weights = []() {
  static float4 weights[FILTER_SIZE * 2];
  float4* hweights = weights;
  