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XX-360-panorama.html
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XX-360-panorama.html
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<!doctype html>
<!--
Copyright 2016 The Chromium Authors. All rights reserved.
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no">
<meta name="mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-capable" content="yes">
<title>XX - 360 Panorama</title>
<!--
This sample demonstrates how to render a 360 degree panoramic image in VR.
-->
<style>
#webgl-canvas {
box-sizing: border-box;
height: 100%;
left: 0;
margin: 0;
position: absolute;
top: 0;
width: 100%;
}
</style>
<!-- This entire block in only to facilitate dynamically enabling and
disabling the WebVR polyfill, and is not necessary for most WebVR apps.
If you want to use the polyfill in your app, just include the js file and
everything will work the way you want it to by default. -->
<script>
var WebVRConfig = {
// Prevents the polyfill from initializing automatically.
DEFER_INITIALIZATION: true,
// Polyfill optimizations
DIRTY_SUBMIT_FRAME_BINDINGS: true,
BUFFER_SCALE: 0.75,
};
</script>
<script src="js/third-party/webvr-polyfill.js"></script>
<script src="js/third-party/wglu/wglu-url.js"></script>
<script>
// Dynamically turn the polyfill on if requested by the query args.
if (WGLUUrl.getBool('polyfill', false)) { InitializeWebVRPolyfill(); }
</script>
<!-- End sample polyfill enabling logic -->
<script src="js/third-party/gl-matrix-min.js"></script>
<script src="js/third-party/wglu/wglu-program.js"></script>
<script src="js/third-party/wglu/wglu-stats.js"></script>
<script src="js/vr-panorama.js"></script>
<script src="js/vr-samples-util.js"></script>
</head>
<body>
<canvas id="webgl-canvas"></canvas>
<script>
/* global mat4, vec3, VRPanorama, WGLUStats, VRSamplesUtil */
(function () {
"use strict";
var vrDisplay = null;
var projectionMat = mat4.create();
var poseMat = mat4.create();
var viewMat = mat4.create();
var vrPresentButton = null;
// ================================================================
// WebGL and WebAudio scene setup. This code is not WebVR specific.
// ================================================================
// WebGL setup.
var webglCanvas = document.getElementById("webgl-canvas");
var gl = null;
var panorama = null;
var stats = null;
function init (preserveDrawingBuffer) {
var glAttribs = {
alpha: false,
antialias: false,
preserveDrawingBuffer: preserveDrawingBuffer
};
gl = webglCanvas.getContext("webgl", glAttribs);
gl.enable(gl.DEPTH_TEST);
gl.enable(gl.CULL_FACE);
panorama = new VRPanorama(gl);
panorama.setImage("media/textures/pano_4k.jpg");
stats = new WGLUStats(gl);
// Wait until we have a WebGL context to resize and start rendering.
window.addEventListener("resize", onResize, false);
onResize();
window.requestAnimationFrame(onAnimationFrame);
}
// ================================
// WebVR-specific code begins here.
// ================================
function onVRRequestPresent () {
vrDisplay.requestPresent([{ source: webglCanvas }]).then(function () {
}, function () {
VRSamplesUtil.addError("requestPresent failed.", 2000);
});
}
function onVRExitPresent () {
if (!vrDisplay.isPresenting)
return;
vrDisplay.exitPresent().then(function () {
}, function () {
VRSamplesUtil.addError("exitPresent failed.", 2000);
});
}
function onVRPresentChange () {
onResize();
if (vrDisplay.isPresenting) {
if (vrDisplay.capabilities.hasExternalDisplay) {
VRSamplesUtil.removeButton(vrPresentButton);
vrPresentButton = VRSamplesUtil.addButton("Exit VR", "E", "media/icons/cardboard64.png", onVRExitPresent);
}
} else {
if (vrDisplay.capabilities.hasExternalDisplay) {
VRSamplesUtil.removeButton(vrPresentButton);
vrPresentButton = VRSamplesUtil.addButton("Enter VR", "E", "media/icons/cardboard64.png", onVRRequestPresent);
}
}
}
if (navigator.getVRDisplays) {
navigator.getVRDisplays().then(function (displays) {
if (displays.length > 0) {
vrDisplay = displays[0];
init(true);
if (!vrDisplay.stageParameters) {
VRSamplesUtil.addButton("Reset Pose", "R", null, function () { vrDisplay.resetPose(); });
}
if (vrDisplay.capabilities.canPresent)
vrPresentButton = VRSamplesUtil.addButton("Enter VR", "E", "media/icons/cardboard64.png", onVRRequestPresent);
window.addEventListener('vrdisplaypresentchange', onVRPresentChange, false);
window.addEventListener('vrdisplayactivated', onVRRequestPresent, false);
window.addEventListener('vrdisplaydeactivated', onVRExitPresent, false);
} else {
init(false);
VRSamplesUtil.addInfo("WebVR supported, but no VRDisplays found.", 3000);
}
});
} else if (navigator.getVRDevices) {
init(false);
VRSamplesUtil.addError("Your browser supports WebVR but not the latest version. See <a href='http://webvr.info'>webvr.info</a> for more info.");
} else {
init(false);
VRSamplesUtil.addError("Your browser does not support WebVR. See <a href='http://webvr.info'>webvr.info</a> for assistance.");
}
function onResize () {
if (vrDisplay && vrDisplay.isPresenting) {
var leftEye = vrDisplay.getEyeParameters("left");
var rightEye = vrDisplay.getEyeParameters("right");
webglCanvas.width = Math.max(leftEye.renderWidth, rightEye.renderWidth) * 2;
webglCanvas.height = Math.max(leftEye.renderHeight, rightEye.renderHeight);
} else {
webglCanvas.width = webglCanvas.offsetWidth * window.devicePixelRatio;
webglCanvas.height = webglCanvas.offsetHeight * window.devicePixelRatio;
}
}
function getPoseMatrix (out, pose) {
// When rendering a panorama ignore the pose position. You want the
// users head to stay centered at all times. This would be terrible
// advice for any other type of VR scene, by the way!
var orientation = pose.orientation;
if (!orientation) { orientation = [0, 0, 0, 1]; }
mat4.fromQuat(out, orientation);
}
function renderSceneView (poseInMat, eye) {
if (eye) {
// FYI: When rendering a panorama do NOT offset the views by the IPD!
// That will make the viewer feel like their head is trapped in a tiny
// ball, which is usually not the desired effect.
mat4.perspectiveFromFieldOfView(projectionMat, eye.fieldOfView, 0.1, 1024.0);
mat4.invert(viewMat, poseInMat);
} else {
mat4.perspective(projectionMat, Math.PI*0.4, webglCanvas.width / webglCanvas.height, 0.1, 1024.0);
mat4.invert(viewMat, poseInMat);
}
panorama.render(projectionMat, viewMat);
}
function onAnimationFrame (t) {
stats.begin();
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
if (vrDisplay) {
vrDisplay.requestAnimationFrame(onAnimationFrame);
var pose = vrDisplay.getPose();
getPoseMatrix(poseMat, pose);
if (vrDisplay.isPresenting) {
gl.viewport(0, 0, webglCanvas.width * 0.5, webglCanvas.height);
renderSceneView(poseMat, vrDisplay.getEyeParameters("left"));
gl.viewport(webglCanvas.width * 0.5, 0, webglCanvas.width * 0.5, webglCanvas.height);
renderSceneView(poseMat, vrDisplay.getEyeParameters("right"));
vrDisplay.submitFrame(pose);
} else {
gl.viewport(0, 0, webglCanvas.width, webglCanvas.height);
renderSceneView(poseMat, null);
stats.renderOrtho();
}
} else {
window.requestAnimationFrame(onAnimationFrame);
// No VRDisplay found.
gl.viewport(0, 0, webglCanvas.width, webglCanvas.height);
mat4.perspective(projectionMat, Math.PI*0.4, webglCanvas.width / webglCanvas.height, 0.1, 1024.0);
mat4.identity(viewMat);
panorama.render(projectionMat, viewMat);
stats.renderOrtho();
}
stats.end();
}
})();
</script>
</body>
</html>