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Code Issues Releases Wiki Activity

Log density visualization

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Bradlee Speice
2024-12-01 21:57:10 -05:00
parent 79b66337e8
commit 2e8a6d1ce7
20 changed files with 206 additions and 194 deletions
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38
blog/2024-11-15-playing-with-fire/3-log-density/chaosGameHistogram.ts
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@ -1,34 +1,34 @@
import {plot} from "./plotHistogram";
// hidden-start
import {randomBiUnit} from "../src/randomBiUnit";
import {randomChoice} from "../src/randomChoice";
import {buildTransform} from "../2-transforms/buildTransform";
import {transformPost} from "../2-transforms/post";
import {transforms} from "../2-transforms/FlameFinal";
import * as params from "../src/params";
import {ChaosGameFinalProps} from "../2-transforms/chaosGameFinal";
import {camera, histIndex} from "../src/camera";
// hidden-end
export type ChaosGameHistogramProps = ChaosGameFinalProps & {
painter: (width: number, histogram: Uint32Array) => ImageData;
}
export function* chaosGameHistogram({width, height, transforms, final, quality, step, painter}: ChaosGameHistogramProps) {
let iterations = (quality ?? 10) * width * height;
step = step ?? 100_000;
const finalTransform = buildTransform(params.xformFinalCoefs, params.xformFinalVariations);
const finalTransformPost = transformPost(finalTransform, params.xformFinalCoefsPost);
const step = 1000;
const quality = 1;
export function* chaosGameHistogram(width: number, height: number) {
let iterations = quality * width * height;
let histogram = new Uint32Array(width * height);
const histogram = new Uint32Array(width * height);
let [x, y] = [randomBiUnit(), randomBiUnit()];
for (let i = 0; i < iterations; i++) {
const [_, transform] = randomChoice(transforms);
[x, y] = transform(x, y);
[x, y] = finalTransformPost(x, y);
[x, y] = final(x, y);
if (i > 20)
plot(x, y, width, histogram);
if (i > 20) {
const [pixelX, pixelY] = camera(x, y, width);
const pixelIndex = histIndex(pixelX, pixelY, width, 1);
histogram[pixelIndex] += 1;
}
if (i % step === 0)
yield histogram;
yield painter(width, histogram);
}
yield histogram;
yield painter(width, histogram);
}