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104 lines
3.7 KiB
104 lines
3.7 KiB
<!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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<style>
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section{
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height: 100vh;
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}
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#hvezdy{
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color: white;
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}
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.earth-fixed{
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padding: 10%;
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position: fixed;
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width: 500px;
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opacity: 0;}
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.stars{
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position:fixed;
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opacity: 0;
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}
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#hvezdicky{
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color: white;
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}
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#zjeveni{
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color: white;
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}
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#rotace{
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color: white;
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}
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img {
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width: 250px;
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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="earth">
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<img class="earth-fixed" src="img/img/e1.jpg" alt="">
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</div>
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<section id="uvod" style="text-align: center; padding-top: 50vh; font-size: 30px;">
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before the scroll,<br>there was the void...
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</section>
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<section id="dark" style="text-align: center; padding-top: 50vh; font-size: 30px; color: grey;">
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... then came<br>the dark
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</section>
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<section id="hvezdy" style="text-align: center; padding-top: 50vh; font-size: 30px; color: grey;">
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... few millions years later,<br>the stars emerged
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</section>
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<section id="zjeveni" style="padding-left: 75%; padding-top: 50vh; font-size: 30px; color: grey;">
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and finally,<br>the planet
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</section>
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<section id="rotace" style="padding-left: 75%; padding-top: 50vh; font-size: 30px; color: grey;">
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earth formed
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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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if (value >= 0 && value <= 255) {
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document.body.style.backgroundColor = "rgb(" + value + "," + value + "," + value + ")";
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}
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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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if (hvezdy_rect.height - hvezdy_rect.top > 0) {
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let opacity = (hvezdy_rect.top / hvezdy_rect.height);
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console.log("Opacity: " + opacity);
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}
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let zjeveni = document.querySelector('#zjeveni');
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let zjeveni_rect = zjeveni.getBoundingClientRect();
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let zeme_img = document.querySelector(".earth-fixed");
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console.log("zjeveni: " + (zjeveni_rect.height - zjeveni_rect.top));
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if (zjeveni_rect.height - zjeveni_rect.top > 0) {
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let opacity = 1 - (zjeveni_rect.top / zjeveni_rect.height);
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console.log("zjeveni opacity: " + opacity)
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zeme_img.style.opacity = opacity;
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}
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let rotace = document.querySelector('#rotace');
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let rotace_rect = rotace.getBoundingClientRect();
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console.log("rotace: " + (rotace_rect.height - rotace_rect.top));
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if (rotace_rect.height - rotace_rect.top > 0) {
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let cislo = Math.ceil(13 * (1 - (rotace_rect.top / rotace_rect.height)));
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console.log("cislo: " + cislo);
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if (cislo >= 1 && cislo <= 13) {
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zeme_img.setAttribute("src", "img/img/e" + cislo + ".jpg");
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}
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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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