Add vectortile branch
This commit is contained in:
Andreas Hocevar
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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="chrome=1">
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<meta name="viewport" content="initial-scale=1.0, user-scalable=no, width=device-width">
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<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.4.0/css/font-awesome.min.css" type="text/css">
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<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css" type="text/css">
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<link rel="stylesheet" href="./resources/prism/prism.css" type="text/css">
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<link rel="stylesheet" href="../css/ol.css" type="text/css">
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<link rel="stylesheet" href="./resources/layout.css" type="text/css">
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<script src="./resources/zeroclipboard/ZeroClipboard.min.js"></script>
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<title>Layer WebGL clipping example</title>
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</head>
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<body>
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<header class="navbar" role="navigation">
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<div class="container" id="navbar-inner-container">
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<a class="navbar-brand" href="./"><img src="./resources/logo-70x70.png"> OpenLayers 3 Examples</a>
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</div>
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</header>
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<div class="container-fluid">
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<div class="row-fluid">
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<div class="span12">
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<div id="map" class="map"></div>
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</div>
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</div>
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<div id="no-webgl" class="alert alert-danger" style="display: none">
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This example requires a browser that supports <a href="http://get.webgl.org/">WebGL</a>.
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</div>
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<div class="row-fluid">
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<div class="span12">
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<h4 id="title">Layer WebGL clipping example</h4>
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<p id="shortdesc">Layer WebGL clipping example.</p>
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<div id="docs"><p>This example shows how to use the <code>precompose</code> and <code>postcompose</code> rendering hooks to clip layers using WebGL.</p>
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</div>
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<div id="tags">clipping, webgl, openstreetmap</div>
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<div id="api-links">Related API documentation: <ul class="inline"><li><a href="../apidoc/ol.Map.html" title="API documentation for ol.Map">ol.Map</a></li>,<li><a href="../apidoc/ol.View.html" title="API documentation for ol.View">ol.View</a></li>,<li><a href="../apidoc/ol.control.html" title="API documentation for ol.control">ol.control</a></li>,<li><a href="../apidoc/ol.has.html" title="API documentation for ol.has">ol.has</a></li>,<li><a href="../apidoc/ol.layer.Tile.html" title="API documentation for ol.layer.Tile">ol.layer.Tile</a></li>,<li><a href="../apidoc/ol.source.OSM.html" title="API documentation for ol.source.OSM">ol.source.OSM</a></li></ul></div>
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</div>
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</div>
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<div class="row-fluid">
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<div id="source-controls">
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<a id="copy-button"><i class="fa fa-clipboard"></i> Copy</a>
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<a id="jsfiddle-button"><i class="fa fa-jsfiddle"></i> Edit</a>
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</div>
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<form method="POST" id="jsfiddle-form" target="_blank" action="http://jsfiddle.net/api/post/jquery/1.11.0/">
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<textarea class="hidden" name="js">if (!ol.has.WEBGL) {
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var info = document.getElementById('no-webgl');
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/**
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* display error message
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*/
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info.style.display = '';
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} else {
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var osm = new ol.layer.Tile({
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source: new ol.source.OSM()
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});
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var map = new ol.Map({
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layers: [osm],
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renderer: 'webgl',
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target: 'map',
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controls: ol.control.defaults({
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attributionOptions: /** @type {olx.control.AttributionOptions} */ ({
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collapsible: false
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})
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}),
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view: new ol.View({
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center: [0, 0],
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zoom: 2
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})
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});
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var fragmentShaderSource = [
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'precision mediump float;',
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'void main() {',
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'}'
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].join('');
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var vertexShaderSource = [
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'attribute vec2 a_position;',
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'void main() {',
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' gl_Position = vec4(a_position, 0, 1);',
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'}'
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].join('');
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osm.on('precompose', function(event) {
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var context = event.glContext;
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var gl = context.getGL();
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var program = gl.createProgram();
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var vertexShader = gl.createShader(gl.VERTEX_SHADER);
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gl.shaderSource(vertexShader, vertexShaderSource);
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gl.compileShader(vertexShader);
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gl.attachShader(program, vertexShader);
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var fragmentShader = gl.createShader(gl.FRAGMENT_SHADER);
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gl.shaderSource(fragmentShader, fragmentShaderSource);
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gl.compileShader(fragmentShader);
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gl.attachShader(program, fragmentShader);
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gl.linkProgram(program);
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context.useProgram(program);
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var positionLocation = gl.getAttribLocation(program, 'a_position');
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gl.enable(gl.STENCIL_TEST);
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gl.colorMask(false, false, false, false);
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gl.stencilOp(gl.KEEP, gl.KEEP, gl.REPLACE);
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gl.stencilFunc(gl.ALWAYS, 1, 0xff);
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var buffer = gl.createBuffer();
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gl.bindBuffer(gl.ARRAY_BUFFER, buffer);
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gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([
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// first band
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-1.0, -1.0, -0.75, -1.0, -1.0, 1.0,
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-1.0, 1.0, -0.75, -1.0, -0.75, 1.0,
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// second band
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-0.5, -1.0, -0.25, -1.0, -0.5, 1.0,
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-0.5, 1.0, -0.25, -1.0, -0.25, 1.0,
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// third band
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0.0, -1.0, 0.25, -1.0, 0.0, 1.0,
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0.0, 1.0, 0.25, -1.0, 0.25, 1.0,
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// forth band
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0.5, -1.0, 0.75, -1.0, 0.5, 1.0,
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0.5, 1.0, 0.75, -1.0, 0.75, 1.0
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]), gl.STATIC_DRAW);
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gl.enableVertexAttribArray(positionLocation);
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gl.vertexAttribPointer(positionLocation, 2, gl.FLOAT, false, 0, 0);
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gl.drawArrays(gl.TRIANGLES, 0, 24);
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gl.bindBuffer(gl.ARRAY_BUFFER, null);
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gl.deleteBuffer(buffer);
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gl.colorMask(true, true, true, true);
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gl.stencilFunc(gl.NOTEQUAL, 0, 0xff);
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gl.stencilOp(gl.KEEP, gl.KEEP, gl.KEEP);
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});
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osm.on('postcompose', function(event) {
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var context = event.glContext;
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var gl = context.getGL();
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gl.disable(gl.STENCIL_TEST);
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});
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}
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</textarea>
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<textarea class="hidden" name="css"></textarea>
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<textarea class="hidden" name="html"><div class="row-fluid">
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<div class="span12">
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<div id="map" class="map"></div>
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</div>
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</div>
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<div id="no-webgl" class="alert alert-danger" style="display: none">
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This example requires a browser that supports <a href="http://get.webgl.org/">WebGL</a>.
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</div>
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</textarea>
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<input type="hidden" name="wrap" value="l">
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<input type="hidden" name="resources" value="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css,https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/js/bootstrap.min.js,http://openlayers.org/en/v3.8.2/css/ol.css,http://openlayers.org/en/v3.8.2/build/ol.js">
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</form>
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<pre><code id="example-source" class="language-markup"><!DOCTYPE html>
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<html>
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<head>
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<title>Layer WebGL clipping example</title>
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<script src="https://code.jquery.com/jquery-1.11.2.min.js"></script>
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<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
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<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
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<link rel="stylesheet" href="http://openlayers.org/en/v3.8.2/css/ol.css" type="text/css">
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<script src="http://openlayers.org/en/v3.8.2/build/ol.js"></script>
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</head>
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<body>
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<div class="container-fluid">
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<div class="row-fluid">
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<div class="span12">
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<div id="map" class="map"></div>
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</div>
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</div>
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<div id="no-webgl" class="alert alert-danger" style="display: none">
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This example requires a browser that supports <a href="http://get.webgl.org/">WebGL</a>.
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</div>
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</div>
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<script>
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if (!ol.has.WEBGL) {
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var info = document.getElementById('no-webgl');
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/**
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* display error message
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*/
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info.style.display = '';
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} else {
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var osm = new ol.layer.Tile({
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source: new ol.source.OSM()
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});
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var map = new ol.Map({
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layers: [osm],
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renderer: 'webgl',
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target: 'map',
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controls: ol.control.defaults({
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attributionOptions: /** @type {olx.control.AttributionOptions} */ ({
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collapsible: false
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})
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}),
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view: new ol.View({
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center: [0, 0],
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zoom: 2
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})
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});
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var fragmentShaderSource = [
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'precision mediump float;',
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'void main() {',
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'}'
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].join('');
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var vertexShaderSource = [
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'attribute vec2 a_position;',
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'void main() {',
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' gl_Position = vec4(a_position, 0, 1);',
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'}'
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].join('');
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osm.on('precompose', function(event) {
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var context = event.glContext;
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var gl = context.getGL();
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var program = gl.createProgram();
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var vertexShader = gl.createShader(gl.VERTEX_SHADER);
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gl.shaderSource(vertexShader, vertexShaderSource);
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gl.compileShader(vertexShader);
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gl.attachShader(program, vertexShader);
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var fragmentShader = gl.createShader(gl.FRAGMENT_SHADER);
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gl.shaderSource(fragmentShader, fragmentShaderSource);
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gl.compileShader(fragmentShader);
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gl.attachShader(program, fragmentShader);
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gl.linkProgram(program);
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context.useProgram(program);
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var positionLocation = gl.getAttribLocation(program, 'a_position');
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gl.enable(gl.STENCIL_TEST);
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gl.colorMask(false, false, false, false);
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gl.stencilOp(gl.KEEP, gl.KEEP, gl.REPLACE);
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gl.stencilFunc(gl.ALWAYS, 1, 0xff);
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var buffer = gl.createBuffer();
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gl.bindBuffer(gl.ARRAY_BUFFER, buffer);
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gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([
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// first band
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-1.0, -1.0, -0.75, -1.0, -1.0, 1.0,
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-1.0, 1.0, -0.75, -1.0, -0.75, 1.0,
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// second band
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-0.5, -1.0, -0.25, -1.0, -0.5, 1.0,
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-0.5, 1.0, -0.25, -1.0, -0.25, 1.0,
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// third band
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0.0, -1.0, 0.25, -1.0, 0.0, 1.0,
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0.0, 1.0, 0.25, -1.0, 0.25, 1.0,
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// forth band
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0.5, -1.0, 0.75, -1.0, 0.5, 1.0,
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0.5, 1.0, 0.75, -1.0, 0.75, 1.0
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]), gl.STATIC_DRAW);
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gl.enableVertexAttribArray(positionLocation);
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gl.vertexAttribPointer(positionLocation, 2, gl.FLOAT, false, 0, 0);
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gl.drawArrays(gl.TRIANGLES, 0, 24);
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gl.bindBuffer(gl.ARRAY_BUFFER, null);
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gl.deleteBuffer(buffer);
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gl.colorMask(true, true, true, true);
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gl.stencilFunc(gl.NOTEQUAL, 0, 0xff);
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gl.stencilOp(gl.KEEP, gl.KEEP, gl.KEEP);
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});
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osm.on('postcompose', function(event) {
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var context = event.glContext;
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var gl = context.getGL();
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gl.disable(gl.STENCIL_TEST);
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});
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}
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</script>
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</body>
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</html></code></pre>
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</div>
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</div>
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<script src="https://code.jquery.com/jquery-1.11.2.min.js"></script>
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<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
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<script src="./resources/common.js"></script>
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<script src="./resources/prism/prism.min.js"></script>
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<script src="loader.js?id=layer-clipping-webgl"></script>
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</body>
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</html>
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Reference in New Issue
Block a user