Developers Digest
142 lines
3.5 KiB
TypeScript
142 lines
3.5 KiB
TypeScript
import { Ticker } from "@/components/shared/pixi/Pixi";
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import PixiAssetManager from "@/components/shared/pixi/PixiAssetManager";
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import { RenderTexture, Sprite, Text } from "pixi.js";
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// Add more contrast to the ASCII_CHARS and ensure 'X' is used
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// const ASCII_CHARS = [' ', '.', ':', '-', '=', '+', 'X'];
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const ASCII_CHARS = ' .":,-_^=+';
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function getAsciiChar(luminance: number) {
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if (luminance < 50) return " ";
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const norm = Math.max(0, Math.min(1, (luminance - 16) / (250 - 16)));
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const skewed = Math.pow(norm, 1.5);
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const minIdx = 1;
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const maxIdx = ASCII_CHARS.length - 1;
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const idx = minIdx + Math.floor(skewed * (maxIdx - minIdx + 1));
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const safeIdx = Math.max(minIdx, Math.min(maxIdx, idx));
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return ASCII_CHARS[safeIdx];
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}
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// Sprinkle logic is now a no-op, as getAsciiChar handles the randomness
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function sprinkleAscii(line: string) {
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return line;
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}
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const tickAscii: Ticker = async ({ app, canvas }) => {
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const textures = await Promise.all(
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Array.from({ length: 150 }, async (_, i) => {
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const texture = await PixiAssetManager.load(
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`/Arşiv/FAQ Demo/FAQ_${i.toString().padStart(5, "0")}.png`,
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);
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return texture!;
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}),
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);
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const width = canvas.clientWidth;
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const height = canvas.clientHeight;
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const sprites = textures.map((texture) => new Sprite(texture));
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sprites.forEach((sprite) => {
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sprite.width = width;
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sprite.height = height;
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sprite.x = 0;
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sprite.y = 0;
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app.stage.addChild(sprite);
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sprite.alpha = 0;
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});
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// Render the texture to a renderTexture to extract pixels
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const renderTexture = RenderTexture.create({ width, height });
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let ascii = "";
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const asciiText = new Text({
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text: ascii,
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style: {
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fontFamily: "monospace",
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fontSize: 8,
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fill: 0x000,
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align: "left",
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lineHeight: 8,
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whiteSpace: "pre",
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},
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});
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asciiText.alpha = 0.2;
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asciiText.x = 0;
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asciiText.y = 0;
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const variants: string[] = [];
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const render = (index: number) => {
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ascii = "";
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const sprite = sprites[index];
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sprites.forEach((sprite) => {
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sprite.alpha = 0;
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});
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sprite.alpha = 1;
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app.renderer.render({ container: sprite, target: renderTexture });
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sprite.alpha = 0;
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const pixels = app.renderer.extract.pixels(renderTexture).pixels;
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const charWidth = 4.81640625;
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for (let y = 0; y < height; y += 8) {
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let line = "";
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for (let x = 0; x < width; x += charWidth) {
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let totalLum = 0;
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let count = 0;
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for (let dy = 0; dy < 8; dy++) {
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for (let dx = 0; dx < 4; dx++) {
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const px = Math.floor(x + dx);
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const py = Math.floor(y + dy);
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if (px >= width || py >= height) continue;
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const idx = (py * width + px) * 4;
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const r = pixels[idx];
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const g = pixels[idx + 1];
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const b = pixels[idx + 2];
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const lum = 0.2126 * r + 0.7152 * g + 0.0722 * b;
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totalLum += lum;
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count++;
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}
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}
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const avgLum = count ? totalLum / count : 0;
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line += getAsciiChar(avgLum);
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}
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ascii += sprinkleAscii(line) + "\n";
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}
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variants[index] = ascii;
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asciiText.text = ascii;
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};
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app.stage.addChild(asciiText);
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for (let i = 0; i < sprites.length; i++) {
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render(i);
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}
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let i = 0;
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//@ts-expect-error - safeAdd method exists on extended ticker
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app.ticker.safeAdd(() => {
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i++;
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if (i >= sprites.length) i = 0;
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render(i);
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});
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};
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export default tickAscii;
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