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webgl_tutorials
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Add some kind of parallax effect

master
Georg Hopp 10 years ago
parent
d8dd1126fd
commit
b3ac61966a
6 changed files with 50 additions and 11 deletions
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  1. 7
      css/main.css
  2. 5
      cube.html
  3. 5
      index.html
  4. 34
      js/parallax.js
  5. 5
      square.html
  6. 5
      texture.html

7
css/main.css
View File

@ -17,8 +17,9 @@
border-width: 3px;
padding: 10px;
}
.content {
position: fixed;
#content {
position: absolute;
box-shadow: 10px 10px 10px black;
top: 50%;
left: 50%;
/* bring your own prefixes */
@ -41,7 +42,7 @@
position: fixed;
border-radius: 15px;
border-width: 2px;
z-index: 1;
z-index: 10;
}
h1,h2,h3,h4,h5,h6 {
font-weight: normal;

5
cube.html
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@ -2,6 +2,7 @@
<head>
<title>Colored animated cube.</title>
<link rel="stylesheet" href="css/main.css">
<script type="text/javascript" src="js/parallax.js"></script>
<script type="text/javascript" src="js/gl-matrix-min.js"></script>
<script type="text/javascript" src="js/cube.js"></script>
@ -36,12 +37,12 @@
</style>
</head>
<body onLoad="startGl()">
<body onLoad="startGl();init()" onScroll="parallax()">
<div id="background"></div>
<div id="back" class="text">
<a href="index.html">back</a>
</div>
<div class="content text">
<div id="content" class="text">
<h1>Colored animated cube.</h1>
<p>
An animated cube. Each side has a different color.

5
index.html
View File

@ -2,11 +2,12 @@
<head>
<title> Oh my Gosh </title>
<link rel="stylesheet" href="css/main.css">
<script type="text/javascript" src="js/parallax.js"></script>
</head>
<body>
<body onLoad="init()" onScroll="parallax()">
<div id="background"></div>
<div class="content text">
<div id="content" class="text">
<h1>Some WebGL tests</h1>
<p>
This is my WebGL playground. The examples are taken from the

34
js/parallax.js
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@ -0,0 +1,34 @@
/*
* OK, this is not really a parallax... I just want to see my content move
* somewhat faster than the background... hey, ho, let's go
*/
var background, content, content_top, content_left;
function init() {
content = document.getElementById("content");
content_top = parseFloat(window.getComputedStyle(content).top);
content_left = parseFloat(window.getComputedStyle(content).left);
background = document.getElementById("background");
background_top = parseFloat(window.getComputedStyle(background).top);
background_left = parseFloat(window.getComputedStyle(background).left);
}
function parallax() {
if (! document.documentElement) return;
var v_scroll =
(document.documentElement
&& document.documentElement.scrollTop)
|| document.body.scrollTop;
var h_scroll =
(document.documentElement
&& document.documentElement.scrollLeft)
|| document.body.scrollLeft;
background.style.top = background_top + Math.round(v_scroll/2);
background.style.left = background_left + Math.round(h_scroll/2);
content.style.top = content_top + Math.round(v_scroll/3.0);
content.style.left = content_left + Math.round(h_scroll/3.0);
}
// vim: set ts=2 sw=2:

5
square.html
View File

@ -2,6 +2,7 @@
<head>
<title>First very simple WebGL example...</title>
<link rel="stylesheet" href="css/main.css">
<script type="text/javascript" src="js/parallax.js"></script>
<script type="text/javascript" src="js/gl-matrix-min.js"></script>
<script type="text/javascript" src="js/square.js"></script>
@ -30,12 +31,12 @@
</style>
</head>
<body onLoad="startGl()">
<body onLoad="startGl();init()" onScroll="parallax()">
<div id="background"></div>
<div id="back" class="text">
<a href="index.html">back</a>
</div>
<div class="content text">
<div id="content" class="text">
<h1>First very simple WebGL example...</h1>
<p>
This is the beginning, not even 3D. Just initialize the

5
texture.html
View File

@ -2,6 +2,7 @@
<head>
<title>My first animated and textured WebGL content.</title>
<link rel="stylesheet" href="css/main.css">
<script type="text/javascript" src="js/parallax.js"></script>
<script type="text/javascript" src="js/gl-matrix-min.js"></script>
<script type="text/javascript" src="js/texture.js"></script>
@ -36,12 +37,12 @@
</style>
</head>
<body onLoad="startGl()">
<body onLoad="startGl();init()" onScroll="parallax()">
<div id="background"></div>
<div id="back" class="text">
<a href="index.html">back</a>
</div>
<div class="content text">
<div id="content" class="text">
<div class="gl texture">
<canvas id="cube" width="200", height="200"></canvas>
</div>

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