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Code Issues Releases Wiki Activity

Fix final transform modifying coordinates

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Bradlee Speice
2024-12-08 15:35:27 -05:00
parent 845e7fb4f7
commit 3c583705f8
8 changed files with 27 additions and 20 deletions
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12
blog/2024-11-15-playing-with-fire/3-log-density/chaosGameHistogram.ts
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@ -5,9 +5,9 @@ import {ChaosGameFinalProps} from "../2-transforms/chaosGameFinal";
import {camera, histIndex} from "../src/camera";
// hidden-end
export type ChaosGameHistogramProps = ChaosGameFinalProps & {
painter: (width: number, histogram: Uint32Array) => ImageData;
paint: (width: number, histogram: Uint32Array) => ImageData;
}
export function* chaosGameHistogram({width, height, transforms, final, quality, step, painter}: ChaosGameHistogramProps) {
export function* chaosGameHistogram({width, height, transforms, final, quality, step, paint}: ChaosGameHistogramProps) {
let iterations = (quality ?? 1) * width * height;
step = step ?? 100_000;
@ -18,17 +18,17 @@ export function* chaosGameHistogram({width, height, transforms, final, quality,
for (let i = 0; i < iterations; i++) {
const [_, transform] = randomChoice(transforms);
[x, y] = transform(x, y);
[x, y] = final(x, y);
const [finalX, finalY] = final(x, y);
if (i > 20) {
const [pixelX, pixelY] = camera(x, y, width);
const [pixelX, pixelY] = camera(finalX, finalY, width);
const pixelIndex = histIndex(pixelX, pixelY, width, 1);
histogram[pixelIndex] += 1;
}
if (i % step === 0)
yield painter(width, histogram);
yield paint(width, histogram);
}
yield painter(width, histogram);
yield paint(width, histogram);
}