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<!DOCTYPE html> |
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<html lang="en"> |
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<head> |
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<meta charset="UTF-8"> |
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<meta http-equiv="X-UA-Compatible" content="IE=edge"> |
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<meta name="viewport" content="width=device-width, initial-scale=1.0"> |
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<title>Vesmír</title> |
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<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-wEmeIV1mKuiNpC+IOBjI7aAzPcEZeedi5yW5f2yOq55WWLwNGmvvx4Um1vskeMj0" crossorigin="anonymous"> |
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<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0/dist/js/bootstrap.bundle.min.js" integrity="sha384-p34f1UUtsS3wqzfto5wAAmdvj+osOnFyQFpp4Ua3gs/ZVWx6oOypYoCJhGGScy+8" crossorigin="anonymous"></script> |
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<style> |
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section{ |
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height: 100vh; |
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text-align: center; |
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} |
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#hvezdy{ |
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color: white; |
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} |
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.zeme-fixed{ |
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width: 300px; |
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position: fixed; |
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opacity: 0; |
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margin-left: 50px; |
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margin-top: 100px; |
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} |
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.hvezdy_img{ |
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position: fixed; |
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opacity: 0; |
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z-index: 0; |
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} |
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#zjeveni, #rotace, #end{ |
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color: white; |
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position: relative; |
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z-index: 1; |
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} |
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</style> |
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</head> |
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<body> |
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<div id="stars"> |
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<img class="hvezdy_img" src="img/stars.jpg" alt=""> |
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</div> |
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<div id="zeme"> |
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<img class="zeme-fixed" src="img/e1.jpg" alt=""> |
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</div> |
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<section id="uvod"> |
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<h2>Before the scroll,<br> |
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there was a void...</h2> |
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</section> |
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<section id="dark"> |
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<h2>...then came<br> |
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the dark</h2> |
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</section> |
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<section id="hvezdy"> |
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<h2>few milions years later,<br> |
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the stars emerged</h2> |
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</section> |
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<section id="zjeveni"> |
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<h2>and finally,<br> the planet</h2> |
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</section> |
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<section id="rotace"> |
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<h2>Earth formed</h2> |
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</section> |
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<section id="end"> |
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<h2 style="padding-top: 250px;">this was the begining</h2> |
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</section> |
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<script> |
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function handler(){ |
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let dark = document.querySelector('#dark'); |
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let dark_rect = dark.getBoundingClientRect(); |
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//console.log("dark:" + dark_rect.top); |
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let value = Math.ceil(255 * (dark_rect.top / dark_rect.height)); |
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document.body.style.backgroundColor = "rgb(" + value + "," + value + "," + value + ")"; |
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let hvezdy = document.querySelector("#hvezdy"); |
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let hvezdy_rect = hvezdy.getBoundingClientRect(); |
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//console.log("hvezdy: " + (hvezdy_rect.height - hvezdy_rect.top)); |
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let hvezdy_img = document.querySelector(".hvezdy_img") |
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let opacity_hvezdy = 1 - (hvezdy_rect.top / hvezdy_rect.height); |
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hvezdy_img.style.opacity = opacity_hvezdy |
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let zjeveni = document.querySelector("#zjeveni"); |
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let zjeveni_rect = zjeveni.getBoundingClientRect(); |
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//console.log("hvezdy: " + (zjeveni_rect.height - zjeveni_rect.top)); |
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let zeme = document.querySelector(".zeme-fixed") |
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let opacity = 1 - (zjeveni_rect.top / zjeveni_rect.height); |
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zeme.style.opacity = opacity; |
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let rotace = document.querySelector("#rotace") |
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let rotace_rect = rotace.getBoundingClientRect(); |
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let cislo = Math.ceil(13 * (1 - (rotace_rect.top / rotace_rect.height))); |
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if(cislo >= 1 && cislo <=13 ){ |
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//console.log("rotace:" + cislo) |
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zeme.src = ("img/e" + cislo + ".jpg"); |
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} |
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let end = document.querySelector("#end"); |
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let end_rect = end.getBoundingClientRect(); |
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if(end_rect.height > end_rect.top ){ |
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opacity = (end_rect.top / end_rect.height); |
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zeme.style.opacity = opacity; |
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} |
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} |
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window.addEventListener('load', handler, false); |
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window.addEventListener('scroll', handler, false); |
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window.addEventListener('resize', handler, false); |
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</script> |
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</body> |
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</html> |
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