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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/error-texture.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.
+-->
+
+<!--
+This sample attempts to show what the error texture is, how to set it and
+how turning it off will generate helpful error information.
+-->
+<html>
+<head>
+<title>Error Texture</title>
+<script type="text/javascript" src="o3djs/base.js"></script>
+<script type="text/javascript">
+o3djs.require('o3djs.util');
+o3djs.require('o3djs.math');
+o3djs.require('o3djs.rendergraph');
+o3djs.require('o3djs.primitives');
+o3djs.require('o3djs.effect');
+
+// Events
+// Run the init() once the page has finished loading.
+// and 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_pack;
+var g_viewInfo;
+var g_texture;
+var g_errorMsgElement;
+
+/**
+ * Creates the client area.
+ */
+function init() {
+ o3djs.util.makeClients(initStep2);
+}
+
+/**
+ * Initializes O3D, loads the effect, and sets up some quads.
+ * @param {Array} clientElements Array of o3d object elements.
+ */
+function initStep2(clientElements) {
+ // Initialize global variables and libraries.
+ var o3dElement = clientElements[0];
+ g_o3d = o3dElement.o3d;
+ g_math = o3djs.math;
+ g_client = o3dElement.client;
+
+ g_errorMsgElement =
+ document.getElementById('errorMsg');
+
+ // Turn of the error callback that o3djs.base.init setup.
+ g_client.clearErrorCallback();
+
+ // Let us render on demand.
+ g_client.renderMode = g_o3d.Client.RENDERMODE_ON_DEMAND;
+
+ // Create 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);
+
+ var clientWidth = g_client.width;
+ var clientHeight = g_client.height;
+ g_viewInfo.drawContext.projection = g_math.matrix4.orthographic(
+ -clientWidth * 0.5,
+ clientWidth * 0.5,
+ -clientHeight * 0.5,
+ clientHeight * 0.5,
+ 0.001,
+ 1000);
+
+ g_viewInfo.drawContext.view = g_math.matrix4.lookAt(
+ [0, 500, 0], // eye
+ [0, 0, 0], // target
+ [0, 0, -1]); // up
+
+ // Create and load the effect.
+ var effect = g_pack.createObject('Effect');
+ o3djs.effect.loadEffect(effect, 'shaders/texture-only.shader');
+
+ // Create a Material for the effect.
+ var myMaterial = g_pack.createObject('Material');
+
+ // Set the material's drawList
+ myMaterial.drawList = g_viewInfo.zOrderedDrawList;
+
+ // Apply our effect to this material.
+ myMaterial.effect = effect;
+
+ // Creates a quad using the effect.
+ var shape = o3djs.primitives.createPlane(g_pack,
+ myMaterial,
+ 1,
+ 1,
+ 1,
+ 1);
+
+ var pixels = [];
+ for (var y = 0; y < 32; ++y) {
+ for (var x = 0; x < 32; ++x) {
+ var offset = (y * 32 + x) * 3; // rgb
+ var u = x / 32 * Math.PI * 0.5;
+ var v = y / 32 * Math.PI * 0.5;
+ pixels[offset + 0] = 0; // red
+ pixels[offset + 1] = Math.floor(y / 8) % 2; // green
+ pixels[offset + 2] = Math.floor(x / 8) % 2; // blue
+ }
+ }
+ var texture = g_pack.createTexture2D(32, 32, g_o3d.Texture.XRGB8, 1, false);
+ texture.set(0, pixels);
+
+ // display the quad 4 times with situations
+ // by overriding the sampler on each instance.
+ for (var s = 0; s < 4; ++s) {
+ // create a transform for an instance
+ var transform = g_pack.createObject('Transform');
+ transform.translate((s - 1.5) * 140, 0, 0);
+ transform.scale(128, 1, 128),
+ transform.parent = g_client.root;
+ transform.addShape(shape);
+
+ // case 0: Correct Texture.
+ // case 1: ParamSampler and Sampler but no Texture
+ // case 2: ParamSampler but no Sampler,
+ // case 3: No ParamSampler.
+ if (s <= 2) {
+ // Create a ParamSampler on the transform with the same name as in
+ // the effect so this param will be used instead of the one on the
+ // material.
+ var samplerParam = transform.createParam('texSampler0', 'ParamSampler');
+
+ if (s <= 1) {
+ var sampler = g_pack.createObject('Sampler');
+ sampler.name = "s2d";
+ samplerParam.value = sampler;
+ sampler.addressModeU = g_o3d.Sampler.CLAMP;
+ sampler.addressModeV = g_o3d.Sampler.CLAMP;
+ if (s == 0) {
+ sampler.texture = texture;
+ }
+ }
+ }
+ }
+
+ g_client.setPostRenderCallback(onRender);
+
+ // Render once now that things are setup.
+ render();
+}
+
+function setToUserTexture() {
+ var pixels = [];
+ for (var y = 0; y < 32; ++y) {
+ for (var x = 0; x < 32; ++x) {
+ var offset = (y * 32 + x) * 3; // rgb
+ var u = x / 32 * Math.PI * 0.5;
+ var v = y / 32 * Math.PI * 0.5;
+ pixels[offset + 0] = Math.cos(u); // red
+ pixels[offset + 1] = Math.sin(v); // green
+ pixels[offset + 2] = Math.sin(u); // blue
+ }
+ }
+ var texture = g_pack.createTexture2D(32, 32, g_o3d.Texture.XRGB8, 1, false);
+ texture.set(0, pixels);
+
+ g_client.setErrorTexture(texture);
+ // Render once now that things are setup.
+ render();
+}
+
+function setToNoTexture() {
+ g_client.setErrorTexture(null);
+ render();
+
+}
+
+function hide0() {
+ var child = g_client.root.children[1];
+ child.visible = !child.visible;
+ render();
+}
+
+function hide1() {
+ var child = g_client.root.children[2];
+ child.visible = !child.visible;
+ render();
+}
+
+function reportError(msg) {
+ g_errorMsgElement.innerHTML = g_client.lastError;
+ g_client.clearLastError();
+ g_client.clearErrorCallback();
+}
+
+function render() {
+ // Render once now that things are setup.
+ g_client.setErrorCallback(reportError);
+ g_client.render();
+}
+
+function onRender() {
+}
+
+/**
+ * Removes any callbacks so they don't get called after the page has unloaded.
+ */
+function unload() {
+ g_client.cleanup();
+}
+</script>
+</head>
+<body>
+<h1>Error Texture.</h1>
+<br/>
+Demonstrates how missing textures are handled.
+<div>
+<!-- Start of O3D plugin -->
+<div id="o3d" style="width: 800px; height: 600px;"></div>
+<!-- End of O3D plugin -->
+</div>
+<br/>
+<input type="button" value="User Texture" onClick="setToUserTexture()"/>
+<input type="button" value="No Texture" onClick="setToNoTexture()"/>
+<input type="button" value="hide 0" onClick="hide0()"/>
+<input type="button" value="hide 1" onClick="hide1()"/>
+<table><tr><td>Error: </td><td id="errorMsg">-</td></tr></table>
+</html>
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