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authorgspencer@google.com <gspencer@google.com@0039d316-1c4b-4281-b951-d872f2087c98>2009-05-27 23:15:42 +0000
committergspencer@google.com <gspencer@google.com@0039d316-1c4b-4281-b951-d872f2087c98>2009-05-27 23:15:42 +0000
commit05b47f7a8c5451f858dc220df0e3a97542edace6 (patch)
treea2273d619f0625c9d44d40842845ccce2eac1045 /o3d/samples/render-mode.html
parent5cdc8bdb4c847cefe7f4542bd10c9880c2c557a0 (diff)
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This is the O3D source tree's initial commit to the Chromium tree. It
is not built or referenced at all by the chrome build yet, and doesn't yet build in it's new home. We'll change that shortly. git-svn-id: svn://svn.chromium.org/chrome/trunk/src@17035 0039d316-1c4b-4281-b951-d872f2087c98
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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.
+-->
+
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
+ "http://www.w3.org/TR/html4/loose.dtd">
+<html>
+<head>
+<title>
+ Render Mode Example.
+</title>
+<style type="text/css">
+ html, body {
+ height: 100%;
+ margin: 0;
+ padding: 0;
+ border: none;
+ }
+</style>
+</head>
+<body onload="init();" onunload="uninit();">
+<script type="text/javascript" src="o3djs/base.js"></script>
+<script type="text/javascript">
+o3djs.require('o3djs.util');
+o3djs.require('o3djs.math');
+o3djs.require('o3djs.quaternions');
+o3djs.require('o3djs.rendergraph');
+o3djs.require('o3djs.pack');
+o3djs.require('o3djs.arcball');
+o3djs.require('o3djs.event');
+o3djs.require('o3djs.scene');
+
+var g_root;
+var g_o3d;
+var g_o3dElement
+var g_math;
+var g_quaternions;
+var g_client;
+var g_aball;
+var g_thisRot;
+var g_lastRot;
+var g_pack;
+var g_viewInfo;
+var g_o3dWidth = -1;
+var g_o3dHeight = -1;
+var g_framesRendered = 0;
+
+var g_camera = {
+ eye: [0, 0, 5],
+ target: [0, 0, 0]
+};
+
+var g_dragging = false;
+
+function startDragging(e) {
+ g_lastRot = g_thisRot;
+ g_aball.click([e.x, e.y]);
+ g_dragging = true;
+}
+
+function drag(e) {
+ if (g_dragging) {
+ var rotationQuat = g_aball.drag([e.x, e.y]);
+ var rot_mat = g_quaternions.quaternionToRotation(rotationQuat);
+ g_thisRot = g_math.matrix4.mul(g_lastRot, rot_mat);
+ var m = g_root.localMatrix;
+ g_math.matrix4.setUpper3x3(m, g_thisRot);
+ g_root.localMatrix = m;
+
+ updateClient();
+ }
+}
+
+function stopDragging(e) {
+ g_dragging = false;
+}
+
+function updateClient() {
+ // If we are in RENDERMODE_ON_DEMAND mode then set the render mode again
+ // which will cause the client re-render the display.
+ if (g_client.renderMode == g_o3d.Client.RENDERMODE_ON_DEMAND) {
+ g_client.render();
+ }
+}
+
+function scrollMe(e) {
+ if (e.deltaY) {
+ g_camera.eye =
+ g_math.mulScalarVector((e.deltaY < 0 ? 11 : 13) / 12, g_camera.eye);
+ g_viewInfo.drawContext.view = g_math.matrix4.lookAt(g_camera.eye,
+ g_camera.target,
+ [0, 1, 0]);
+ updateClient();
+ }
+}
+
+function loadFile(path) {
+ function callback(pack, parent, exception) {
+ if (exception) {
+ alert('Could not load: ' + path + '\n' + exception);
+ return;
+ }
+ // Generate draw elements and setup material draw lists.
+ o3djs.pack.preparePack(pack, g_viewInfo);
+ }
+ // Create a new transform for the loaded file
+ var parent = g_pack.createObject('Transform');
+ parent.parent = g_client.root;
+
+ if (path != null) {
+ o3djs.scene.loadScene(g_client, g_pack, parent, path, callback);
+ }
+
+ return parent;
+}
+
+function setClientSize() {
+ var newWidth = g_client.width;
+ var newHeight = g_client.height;
+
+ if (newWidth != g_o3dWidth || newHeight != g_o3dHeight) {
+ g_o3dWidth = newWidth;
+ g_o3dHeight = newHeight;
+
+ // Set the perspective projection matrix
+ g_viewInfo.drawContext.projection = g_math.matrix4.perspective(
+ g_math.degToRad(45), g_o3dWidth / g_o3dHeight, 0.1, 100);
+
+ // Sets a new area size for arcball.
+ g_aball.setAreaSize(g_o3dWidth, g_o3dHeight);
+
+ //o3djs.dump.dump("areaWidth: " + g_o3dWidth + "\n");
+ //o3djs.dump.dump("areaHeight: " + g_o3dHeight + "\n");
+ }
+}
+
+function resize() {
+ setClientSize();
+}
+
+function setRenderMode(event) {
+ var mode = (event) ? event.target.value : window.event.srcElement.value;
+ switch (mode) {
+ case 'continuous':
+ g_client.renderMode = g_o3d.Client.RENDERMODE_CONTINUOUS;
+ break;
+ case 'ondemand':
+ g_client.renderMode = g_o3d.Client.RENDERMODE_ON_DEMAND;
+ break;
+ }
+}
+
+function onRender() {
+ g_framesRendered++;
+ g_viewInfo.clearBuffer.clearColor = [
+ 1 / 38 * (g_framesRendered % 38),
+ 1 / 39 * (g_framesRendered % 39),
+ 1 / 41 * (g_framesRendered % 41),
+ 1];
+ resize();
+}
+
+/**
+ * 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) {
+ var path = window.location.href;
+ var index = path.lastIndexOf('/');
+ path = path.substring(0, index + 1) + 'assets/teapot.o3dtgz';
+
+ g_o3dElement = clientElements[0];
+ g_o3d = g_o3dElement.o3d;
+ g_math = o3djs.math;
+ g_quaternions = o3djs.quaternions;
+ g_client = g_o3dElement.client;
+
+ g_pack = g_client.createPack();
+ g_lastRot = g_math.matrix4.identity();
+ g_thisRot = g_math.matrix4.identity();
+
+ // Create the render graph for a view.
+ g_viewInfo = o3djs.rendergraph.createBasicView(
+ g_pack,
+ g_client.root,
+ g_client.renderGraphRoot);
+
+ var root = g_client.root;
+
+ var target = [0, 0, 0];
+ var eye = [0, 0, 5];
+ var up = [0, 1, 0];
+ g_viewInfo.drawContext.view = g_math.matrix4.lookAt(eye, target, up);
+
+ g_aball = o3djs.arcball.create(100, 100);
+ setClientSize();
+
+ g_root = loadFile(path);
+
+ o3djs.event.addEventListener(g_o3dElement, 'mousedown', startDragging);
+ o3djs.event.addEventListener(g_o3dElement, 'mousemove', drag);
+ o3djs.event.addEventListener(g_o3dElement, 'mouseup', stopDragging);
+ o3djs.event.addEventListener(g_o3dElement, 'wheel', scrollMe);
+ document.getElementById('rendermode0').onclick = setRenderMode;
+ document.getElementById('rendermode1').onclick = setRenderMode;
+
+ g_client.setRenderCallback(onRender);
+}
+
+/**
+ * Removes any callbacks so they don't get called after the page has unloaded.
+ */
+function uninit() {
+ if (g_client) {
+ g_client.cleanup();
+ }
+}
+</script>
+<table width="100%" style="height:100%;">
+<tr width="100%" style="height:100%;"><td valign="middle" align="center">
+<h1>
+Render Mode Example.
+</h1>
+<p>The point of this demo is to show that for certain kinds of 3d applications
+ that don't have animation, for example a map viewer, you can set the client's
+render mode to RENDERMODE_ON_DEMAND which will render the 3d one time and then
+stop rendering. This has the advantage of not wasting CPU cycles rendering
+something that does not change over and over.</p>
+<p>The background changes color each time the scene is rendered. The sample
+should start with the scene being constantly rendered but click
+RENDERMODE_ON_DEMAND and you'll see it rendered only when it needs to be
+as determined by the sample. </p>
+<table id="container" width="90%" height="60%" border="2">
+<tr height="100%"><td>
+<div id="o3d" style="width: 100%; height: 100%;"></div>
+</td></tr>
+</table>
+<input type="radio" id="rendermode0" name="rendermode" value="continuous" checked="true"><label for="rendermode0">RENDERMODE_CONTINUOUS (draw as often as possible)</label><br/>
+<input type="radio" id="rendermode1" name="rendermode" value="ondemand"><label for="rendermode1">RENDERMODE_ON_DEMAND (draw once then as the OS requests it like when a window is uncovered)</label><br/>
+<p>
+Drag The Mouse To Rotate<br/>
+Scrollwheel To Zoom<br/>
+Resize The Window To Resize The View
+</p>
+</td></tr></table>
+</body>
+</html>
+
+
generated by cgit v1.1 at 2025-02-02 13:05:56 +0000