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| author | petersont@google.com <petersont@google.com@0039d316-1c4b-4281-b951-d872f2087c98> | 2010-04-29 22:17:57 +0000 |
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| committer | petersont@google.com <petersont@google.com@0039d316-1c4b-4281-b951-d872f2087c98> | 2010-04-29 22:17:57 +0000 |
| commit | 8258a86b378bc6a41fa8947aee92375ec8ff615c (patch) | |
| tree | d5c8cddbbaa23500f951c09cf4f89957459efdc1 /o3d/samples/o3d-webgl-samples | |
| parent | 0380c12a8f7fde532f95da39f48376d256367f9b (diff) | |
| download | chromium_src-8258a86b378bc6a41fa8947aee92375ec8ff615c.zip chromium_src-8258a86b378bc6a41fa8947aee92375ec8ff615c.tar.gz chromium_src-8258a86b378bc6a41fa8947aee92375ec8ff615c.tar.bz2 | |
Added culling sample.
Review URL: http://codereview.chromium.org/1703014
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@45993 0039d316-1c4b-4281-b951-d872f2087c98
Diffstat (limited to 'o3d/samples/o3d-webgl-samples')
| -rw-r--r-- | o3d/samples/o3d-webgl-samples/culling.html | 320 |
1 files changed, 320 insertions, 0 deletions
diff --git a/o3d/samples/o3d-webgl-samples/culling.html b/o3d/samples/o3d-webgl-samples/culling.html new file mode 100644 index 0000000..af1031c --- /dev/null +++ b/o3d/samples/o3d-webgl-samples/culling.html @@ -0,0 +1,320 @@ +<!-- +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 Culling. + +Make sure things off screen get culled. + +By default nothing is culled. If you want object to be culled you must setup +bounding boxes in the transform graph that fit the needs of your application +and then turn on culling for those objects you want culled. +--> +<!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> +Culling. +</title> +<script type="text/javascript" src="../o3d-webgl/base.js"></script> +<script type="text/javascript" src="../o3djs/base.js"></script> +<script type="text/javascript" id="o3dscript"> +o3djs.base.o3d = o3d; +o3djs.require('o3djs.webgl'); +o3djs.require('o3djs.util'); +o3djs.require('o3djs.math'); +o3djs.require('o3djs.rendergraph'); +o3djs.require('o3djs.primitives'); +o3djs.require('o3djs.material'); + +// global variables +var g_timeMult = 1.0; +var g_framesRendered = 0; +var g_o3d; +var g_math; +var g_client; +var g_viewInfo; +var g_pack; +var g_totalTransformsElement; +var g_transformsProcessedElement; +var g_transformsCulledElement; +var g_totalDrawElementsElement; +var g_totalDrawableThingsElement; +var g_drawElementsProcessedElement; +var g_drawElementsCulledElement; +var g_drawElementsRenderedElement; +var g_primitivesRenderedElement; +var g_groupTransforms = []; +var GROUPS_ACROSS = 2; +var UNITS_ACROSS_GROUP = 2; +var TOTAL_ACROSS = GROUPS_ACROSS * UNITS_ACROSS_GROUP; +var HALF_WIDTH = TOTAL_ACROSS * 0.0; +var UNIT_SPACING = 200; + +function createInstances(pack, shape) { + // Make a grid of transforms and put a shape instance on each one. + for (var g = 0; g < GROUPS_ACROSS; g++) { + for (var h = 0; h < GROUPS_ACROSS; h++) { + for (var i = 0; i < GROUPS_ACROSS; i++) { + var groupTransform = pack.createObject('Transform'); + g_groupTransforms[g_groupTransforms.length] = groupTransform; + groupTransform.parent = g_client.root; + // Turn on culling for this transform. + groupTransform.cull = true; + var boundingBox = new g_o3d.BoundingBox([0, 0, 0], + [0, 0, 0]); + groupTransform.translate( + (g * UNITS_ACROSS_GROUP - HALF_WIDTH) * UNIT_SPACING, + (h * UNITS_ACROSS_GROUP - HALF_WIDTH) * UNIT_SPACING, + (i * UNITS_ACROSS_GROUP - HALF_WIDTH) * UNIT_SPACING); + + for (var x = 0; x < UNITS_ACROSS_GROUP; x++) { + for (var y = 0; y < UNITS_ACROSS_GROUP; y++) { + for (var z = 0; z < UNITS_ACROSS_GROUP; z++) { + var transform = pack.createObject('Transform'); + transform.parent = groupTransform; + // Turn on culling for this transform. + transform.cull = true; + transform.addShape(shape); + // Add up the bounding boxes of all the elements. + var elements = shape.elements; + var box = elements[0].boundingBox; + for (var ee = 1; ee < elements.length; ee++) { + box = box.add(elements[ee].boundingBox); + } + + // Set the transform to have a bounding box that is the sum + // of all the elements under it. + transform.boundingBox = box; + transform.translate( + (x - UNITS_ACROSS_GROUP * 0.5) * UNIT_SPACING, + (y - UNITS_ACROSS_GROUP * 0.5) * UNIT_SPACING, + (z - UNITS_ACROSS_GROUP * 0.5) * UNIT_SPACING); + transform.createParam('diffuse', 'ParamFloat4').value = [ + (g * UNITS_ACROSS_GROUP + x) * (1 / TOTAL_ACROSS), + (h * UNITS_ACROSS_GROUP + y) * (1 / TOTAL_ACROSS), + (i * UNITS_ACROSS_GROUP + z) * (1 / TOTAL_ACROSS), + 1]; + // Add the box for this bounding box to the box for the group. + var box = transform.boundingBox.mul(transform.localMatrix); + boundingBox = boundingBox.add(box); + } + } + } + // Set the bounding box for the group transform to encompass all + // the transforms below it. + groupTransform.boundingBox = boundingBox; + } + } + } +} + +/** + * Creates the client area. + */ +function init() { + // These are here so that they are visible to both the browser (so + // selenium sees them) and the embedded V8 engine. + window.g_clock = 0; + window.g_finished = false; // for selenium testing. + + o3djs.webgl.makeClients(initStep2); +} + +/** + * Initializes O3D and creates one shape. + * @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; + + // Set window.g_client as well. Otherwise when the sample runs in + // V8, selenium won't be able to find this variable (it can only see + // the browser environment). + window.g_client = g_client = o3dElement.client; + + g_totalDrawableThingsElement = + o3djs.util.getElementById('totalDrawableThings'); + g_totalTransformsElement = + o3djs.util.getElementById('totalTransforms'); + g_transformsProcessedElement = + o3djs.util.getElementById('transformsProcessed'); + g_transformsCulledElement = + o3djs.util.getElementById('transformsCulled'); + g_totalDrawElementsElement = + o3djs.util.getElementById('totalDrawElements'); + g_drawElementsProcessedElement = + o3djs.util.getElementById('drawElementsProcessed'); + g_drawElementsCulledElement = + o3djs.util.getElementById('drawElementsCulled'); + g_drawElementsRenderedElement = + o3djs.util.getElementById('drawElementsRendered'); + g_primitivesRenderedElement = + o3djs.util.getElementById('primitivesRendered'); + + // Creates a pack to manage our resources/assets + g_pack = g_client.createPack(); + + 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 and load the effect. + var material = o3djs.material.createBasicMaterial( + g_pack, + g_viewInfo, + [1, 1, 1, 1]); + + // Create 2 spheres. + var shape1 = o3djs.primitives.createSphere( + g_pack, + material, + 40, + 20, + 20, + g_math.matrix4.translation([-50, 0, 0])); + + var shape2 = o3djs.primitives.createSphere( + g_pack, + material, + 20, + 20, + 20, + g_math.matrix4.translation([50, 0, 0])); + + // Create a shape and move the 2 sphere primitives to the same shape. + // This is done to show that each of the primitives under the shape + // will get culled separately. + var shape = g_pack.createObject('Shape'); + shape1.elements[0].owner = shape; + shape2.elements[0].owner = shape; + // delete the old shapes. + g_pack.removeObject(shape1); + g_pack.removeObject(shape2); + var elements = shape.elements; + // Turn on culling for the two sphere elements. + elements[0].cull = true; + elements[1].cull = true; + + createInstances(g_pack, shape); + + g_totalDrawableThingsElement.innerHTML = + GROUPS_ACROSS * UNITS_ACROSS_GROUP * + GROUPS_ACROSS * UNITS_ACROSS_GROUP * + GROUPS_ACROSS * UNITS_ACROSS_GROUP; + + g_totalDrawElementsElement.innerHTML = g_client.getObjectsByClassName( + 'o3d.DrawElement').length; + g_totalTransformsElement.innerHTML = g_client.getObjectsByClassName( + 'o3d.Transform').length; + + // Setup an onrender callback for animation. + g_client.setRenderCallback(onrender); + + window.g_finished = true; // for selenium testing. +} + +var g_flag = false; + +// spin the camera. +function onrender(renderEvent) { + g_framesRendered++; + // Get the number of seconds since the last render. + var elapsedTime = renderEvent.elapsedTime; + + // Update g_clock in the browser and cache a V8 copy that can be + // accessed efficiently. g_clock must be in the browser for selenium. + var clock = window.g_clock + elapsedTime * window.g_timeMult; + window.g_clock = clock; + + var x = Math.sin(clock * 0.1) * 300; + var z = Math.cos(clock * 0.1) * 300; + var y = Math.sin(clock * 0.2) * 300; + + g_viewInfo.drawContext.view = g_math.matrix4.lookAt( + [x, y, z], + [0, 0, 0], + [0, 1, 0]); + + g_transformsProcessedElement.innerHTML = renderEvent.transformsProcessed; + g_transformsCulledElement.innerHTML = renderEvent.transformsCulled; + g_drawElementsProcessedElement.innerHTML = renderEvent.drawElementsProcessed; + g_drawElementsCulledElement.innerHTML = renderEvent.drawElementsCulled; + g_drawElementsRenderedElement.innerHTML = renderEvent.drawElementsRendered; + g_primitivesRenderedElement.innerHTML = renderEvent.primitivesRendered; +} + +/** + * Remove any callbacks so they don't get called after the page has unloaded. + */ +function unload() { + if (g_client) { + g_client.cleanup(); + } +} + +</script> +</head> +<body onload="init()" onunload="unload()"> +<h1>Culling</h1> +Objects off screen should get culled. +<br/> +<!-- Start of O3D client area --> +<div id="o3d" style="width: 800px; height: 600px;"></div> +<!-- End of O3D client area --> + +<table> +<tr><td>Total Drawable Things:</td><td><span id="totalDrawableThings">-</span></td></tr> +<tr><td>Total Transforms:</td><td><span id="totalTransforms">-</span></td></tr> +<tr><td>Transforms Processed:</td><td><span id="transformsProcessed">-</span></td></tr> +<tr><td>Transforms Culled:</td><td><span id="transformsCulled">-</span></td></tr> +<tr><td>Total DrawElements:</td><td><span id="totalDrawElements">-</span></td></tr> +<tr><td>DrawElements Processed:</td><td><span id="drawElementsProcessed">-</span></td></tr> +<tr><td>DrawElements Culled:</td><td><span id="drawElementsCulled">-</span></td></tr> +<tr><td>DrawElements Rendered:</td><td><span id="drawElementsRendered">-</span></td></tr> +<tr><td>Primitives Rendered:</td><td><span id="primitivesRendered">-</span></td></tr> +</table> +</body> +</html> |