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instance-override.html
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instance-override.html
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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.
-->
<!--
O3D Instancing Override example.
Display a single instanced object but change some shader parameters for each
instance by putting them on the transform.
-->
<!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>
Instancing with Overrides.
</title>
<!-- Include sample javascript library functions-->
<script type="text/javascript" src="../o3d-webgl/base.js"></script>
<script type="text/javascript" src="../o3djs/base.js"></script>
<!-- Our javascript code -->
<script type="text/javascript" id="o3dscript">
o3djs.base.o3d = o3d;
o3djs.require('o3djs.webgl');
o3djs.require('o3djs.math');
o3djs.require('o3djs.rendergraph');
o3djs.require('o3djs.primitives');
o3djs.require('o3djs.material');
// Events
// init() once the page has finished loading.
// unload() when the page is unloaded.
window.onload = init;
window.onunload = unload;
// global variables
var g_o3d;
var g_math;
var g_client;
var g_viewInfo;
var g_pack;
var g_clock = 0;
var g_timeMult = 1;
var g_finished = false; // for selenium testing.
function createInstances(pack, shape) {
// make a grid of transforms and put a sphere instance on each one
for (var x = 0; x < 10; x++) {
for (var y = 0; y < 10; y++) {
for (var z = 0; z < 10; z++) {
var transform = pack.createObject('Transform');
transform.parent = g_client.root;
transform.addShape(shape);
transform.translate((x - 4.5) * 100,
(y - 4.5) * 100,
(z - 4.5) * 100);
transform.createParam('diffuse', 'ParamFloat4').value = [
x * 0.1,
y * 0.1,
z * 0.1,
1.0];
}
}
}
}
/**
* Creates the client area.
*/
function init() {
o3djs.webgl.makeClients(initStep2);
}
/**
* Initializes O3D and creates a sphere.
* @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.
g_viewInfo = o3djs.rendergraph.createBasicView(
g_pack,
g_client.root,
g_client.renderGraphRoot);
// Create our projection matrix, with a vertical field of view of 45 degrees
// a near clipping plane of 0.1 and far clipping plane of 10000.
g_viewInfo.drawContext.projection = g_math.matrix4.perspective(
g_math.degToRad(45),
g_client.width / g_client.height,
0.1,
10000);
// Create a material.
var material = o3djs.material.createBasicMaterial(
g_pack,
g_viewInfo,
[1, 1, 1, 1]);
// Create a sphere.
var shape = o3djs.primitives.createSphere(g_pack, material, 25, 10, 12);
createInstances(g_pack, shape);
// Setup an onrender callback for animation.
g_client.setRenderCallback(onrender);
g_finished = true; // for selenium testing.
}
// spin the camera.
function onrender(render_event) {
// Get the number of seconds since the last render.
var elapsedTime = render_event.elapsedTime;
g_clock += elapsedTime * g_timeMult;
var x = Math.sin(g_clock * 0.3) * 1000;
var z = Math.cos(g_clock * 0.3) * 1000;
var y = Math.sin(g_clock * 0.7) * 500;
g_viewInfo.drawContext.view = g_math.matrix4.lookAt(
[x, y, z], // eye
[0, 0, 0], // target
[0, 1, 0]); // up
}
/**
* Removes any callbacks so they don't get called after the page has unloaded.
*/
function unload() {
if (g_client) {
g_client.cleanup();
}
}
</script>
</head>
<body>
<h1>Instancing with overrides</h1>
1000 Instances of the same sphere.
<br/>
<!-- Start of O3D plugin -->
<div id="o3d" style="width: 800px; height: 600px;"></div>
<!-- End of O3D plugin -->
</body>
</html>