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Mass formatting, fix mobile display, fix issues with image wrap-around

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This commit is contained in:
Bradlee Speice
2024-12-15 21:19:09 -05:00
parent 1ce6137c17
commit 456c3a66e5
41 changed files with 1026 additions and 817 deletions
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40
blog/2024-11-15-playing-with-fire/3-log-density/paintLogarithmic.ts
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@ -1,21 +1,29 @@
export function paintLogarithmic(width: number, height: number, histogram: number[]): ImageData {
const image = new ImageData(width, height);
export function paintLogarithmic(
width: number,
height: number,
hist: number[]
) {
const img =
new ImageData(width, height);
const histogramLog: number[] = [];
histogram.forEach(value => histogramLog.push(Math.log(value)));
const histLog = hist.map(Math.log);
let histogramLogMax = -Infinity;
for (let value of histogramLog) {
histogramLogMax = Math.max(histogramLogMax, value);
}
let hLogMax = -Infinity;
for (let value of histLog) {
hLogMax = Math.max(hLogMax, value);
}
for (let i = 0; i < histogram.length; i++) {
const pixelIndex = i * 4;
image.data[pixelIndex] = 0; // red
image.data[pixelIndex + 1] = 0; // green
image.data[pixelIndex + 2] = 0; // blue
image.data[pixelIndex + 3] = histogramLog[i] / histogramLogMax * 0xff;
}
for (let i = 0; i < hist.length; i++) {
const pixelIndex = i * 4;
return image;
img.data[pixelIndex] = 0; // red
img.data[pixelIndex + 1] = 0; // green
img.data[pixelIndex + 2] = 0; // blue
const alpha =
histLog[i] / hLogMax * 0xff;
img.data[pixelIndex + 3] = alpha;
}
return img;
}