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<!--
Copyright 2009, Google Inc.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.
* Neither the name of Google Inc. nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-->
<!--
Example of multiple views into the same scene.
-->
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>
Multiple Views
</title>
<!-- Include sample javascript library functions-->
<script type="text/javascript" src="o3djs/base.js"></script>
<!-- Our javascript code -->
<script type="text/javascript" id="o3dscript">
o3djs.require('o3djs.util');
o3djs.require('o3djs.math');
o3djs.require('o3djs.rendergraph');
o3djs.require('o3djs.camera');
o3djs.require('o3djs.pack');
o3djs.require('o3djs.scene');
// Events
// init() once the page has finished loading.
window.onload = init;
// global variables
var g_o3d;
var g_math;
var g_client;
var g_viewInfos = [];
var g_pack;
var g_finished = false; // for selenium testing
/**
* Loads a scene into the transform graph.
* @param {!o3d.Pack} pack Pack to load scene into.
* @param {string} fileName filename of the scene.
* @param {!o3d.Transform} parent parent node in the transform graph to
* which to load the scene into.
*/
function loadScene(pack, fileName, parent) {
// Get our full path to the scene
var scenePath = o3djs.util.getCurrentURI() + fileName;
// Load the file given the full path, and call the callback function
// when its done loading.
o3djs.scene.loadScene(g_client, pack, parent, scenePath, callback);
/**
* Our callback is called once the scene has been loaded into memory
* from the web or locally.
* @param {!o3d.Pack} pack The pack that was passed in above.
* @param {!o3d.Transform} parent The parent that was passed in above.
* @param {*} exception null if loading succeeded.
*/
function callback(pack, parent, exception) {
if (exception) {
alert('Could not load: ' + fileName + '\n' + exception);
return;
}
// Get a cameraInfo (an object with a view and projection matrix)
// using our javascript library function
var cameraInfo = o3djs.camera.getViewAndProjectionFromCameras(
parent,
g_client.width / 2, // because this context is only used 1/2 the area
g_client.height);
// Copy the view and projection to the draw context.
g_viewInfos[0].drawContext.view = cameraInfo.view;
g_viewInfos[0].drawContext.projection = cameraInfo.projection;
// Generate draw elements and setup material draw lists.
o3djs.pack.preparePack(pack, g_viewInfos[0]);
g_finished = true; // for selenium testing.
}
}
/**
* Creates the client area.
*/
function init() {
o3djs.util.makeClients(initStep2);
}
/**
* Initializes O3D and loads the scene into the transform graph.
* @param {Array} clientElements Array of o3d object elements.
*/
function initStep2(clientElements) {
// Initializes global variables and libraries.
var o3dElement = clientElements[0];
g_o3d = o3dElement.o3d;
g_math = o3djs.math;
g_client = o3dElement.client;
// Creates a pack to manage our resources/assets
g_pack = g_client.createPack();
// Create the render graph for a view for the left half of screen.
g_viewInfos[0] = o3djs.rendergraph.createBasicView(
g_pack,
g_client.root,
g_client.renderGraphRoot,
[0.7, 0.2, 0.2, 1],
0,
[0, 0, 0.5, 1]); // left half of screen.
// Setup 3 areas. Each area needs a viewport, a tree traveral, 2 drawpasses
// and although we could clear the screen once let's do it per viewport just
// as an example. The original area is already setup except it needs a
// viewport setting.
// make the 2 right viewports
for (var yy = 0; yy < 2; yy++) {
// Set the view extents to the right half, top or bottom.
var viewExtents = [0.5, yy * 0.5, 0.5, 0.5];
// Give each view a different background color.
var viewBackgroundColor = [0.5, 0.2 + 0.5 * yy, 0.7 - 0.5 * yy, 1.0];
// Make this view get processes after the first view.
var viewPriority = yy + 1;
// Create an extra view. We call createExtraView because we want to
// share DrawLists with the first view so that all 3 views draw the same
// things.
var viewInfo = o3djs.rendergraph.createExtraView(
g_viewInfos[0],
viewExtents,
viewBackgroundColor,
viewPriority);
// Save it off for later.
g_viewInfos[g_viewInfos.length] = viewInfo;
// Get the DrawContext for this area and set the view and
// projection matrices.
var drawContext = viewInfo.drawContext;
if (yy == 0) {
drawContext.projection = g_math.matrix4.perspective(
g_math.degToRad(45),
(g_client.width * 0.5) / (g_client.height * 0.5),
0.1,
100);
drawContext.view = g_math.matrix4.lookAt(
[-10, 3, -15], // eye
[0, 2, 0], // target
[0, 1, 0]); // up
} else {
// lets make this one orthographic
var aspect = g_client.width / g_client.height;
drawContext.projection = g_math.matrix4.orthographic(
-10,
10,
-10 / aspect,
10 / aspect,
0,
100);
// look directly from the front
drawContext.view = g_math.matrix4.lookAt(
[0, 5, 30], // eye
[0, 5, 0], // target
[0, 1, 0]); // up
}
}
// Creates a transform to put our data on.
var my_data_root = g_pack.createObject('Transform');
// Connects our root to the client's root.
my_data_root.parent = g_client.root;
// Load the scene into the transform graph as a child my_data_root
loadScene(g_pack, 'assets/yard.o3dtgz', my_data_root);
}
</script>
</head>
<body>
<h1>Multiple Views</h1>
<br/>
<!-- Start of O3D plugin -->
<div id="o3d" style="width: 800px; height: 600px;"></div>
<!-- End of O3D plugin -->
</body>
</html>
|
