speice.io/posts/2023/06/flam3/2c-final.ts

import {
  Coefs,
  Flame,
  Transform,
  linear,
  julia,
  popcorn,
  pdj,
  transform1Coefs,
  transform1Weight,
  transform2Coefs,
  transform2Weight,
  transform3Coefs,
  transform3Pdj,
  transform3Weight,
  render,
} from "./2a-variations";
import { TransformPost, transform2Post } from "./2b-post";

export class FlameFinal extends Flame {
  constructor(
    transforms: [number, Transform][],
    public readonly final: Transform
  ) {
    super(transforms);
  }

  step() {
    super.step();
    [this.x, this.y] = this.final.apply(this.x, this.y);
  }
}

export const finalCoefs: Coefs = {
  a: 2,
  b: 0,
  c: 0,
  d: 0,
  e: 2,
  f: 0,
};

export function renderFinal(image: ImageData) {
  const transform1 = new Transform(transform1Coefs, [[1, julia]]);

  const transform2 = new TransformPost(
    transform2Coefs,
    [
      [1, linear],
      [1, popcorn],
    ],
    transform2Post
  );

  const [pdjA, pdjB, pdjC, pdjD] = transform3Pdj;
  const transform3 = new Transform(transform3Coefs, [
    [1, pdj(pdjA, pdjB, pdjC, pdjD)],
  ]);

  const transformFinal = new Transform(finalCoefs, [[1, julia]]);

  const flame = new FlameFinal(
    [
      [transform1Weight, transform1],
      [transform2Weight, transform2],
      [transform3Weight, transform3],
    ],
    transformFinal
  );

  render(flame, 1, image);
}