Zakaria
a46764fb1b
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34 lines
1.1 KiB
JavaScript
34 lines
1.1 KiB
JavaScript
(function(){
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window.HPX = window.HPX || {};
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window.HPX['matrix-rain'] = function(el){
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const U = window.HPX._u;
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const k = U.canvas(el), ctx = k.ctx;
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const glyphs = 'アイウエオカキクケコサシスセソタチツテトナニヌネノ0123456789ABCDEF'.split('');
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const fs = 16;
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let cols = 0, drops = [];
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const init = () => {
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cols = Math.ceil(k.w/fs);
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drops = Array.from({length:cols}, () => U.rand(-20, 0));
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};
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init();
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let lw = k.w, lh = k.h;
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const stop = U.loop(() => {
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if (k.w!==lw || k.h!==lh){ init(); lw=k.w; lh=k.h; }
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ctx.fillStyle = 'rgba(0,0,0,0.08)';
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ctx.fillRect(0,0,k.w,k.h);
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ctx.font = fs+'px monospace';
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for (let i=0;i<cols;i++){
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const ch = glyphs[(Math.random()*glyphs.length)|0];
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const x = i*fs, y = drops[i]*fs;
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ctx.fillStyle = '#9fffc9';
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ctx.fillText(ch, x, y);
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ctx.fillStyle = '#00ff6a';
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ctx.fillText(ch, x, y - fs);
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drops[i] += 1;
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if (y > k.h && Math.random() > 0.975) drops[i] = 0;
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}
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});
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return { stop(){ stop(); k.destroy(); } };
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};
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})();
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