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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>OpenVDB - About</title>
<link rel="stylesheet" href="../style.css" type="text/css" />
<link rel="icon" type="image/png" href="../images/favicon.png" />
<link rel="apple-touch-icon" href="../images/iosicon.png" />
<script type="text/javascript"
src="https://ajax.googleapis.com/ajax/libs/jquery/1.4/jquery.min.js">
</script>
<script src="../common.js"></script>
<script type="text/javascript" src="../fancybox/jquery.mousewheel-3.0.4.pack.js"></script>
<script type="text/javascript" src="../fancybox/jquery.fancybox-1.3.4.pack.js"></script>
<link rel="stylesheet" type="text/css"
href="../fancybox/jquery.fancybox-1.3.4.css" media="screen" />
<script type="text/javascript">
$(document).ready(function() {
$("a.pop").fancybox({
'overlayShow' : false,
'transitionIn' : 'elastic',
'transitionOut' : 'elastic'
});
});
</script>
<script src="./details.js"></script>
</head>
<body>
<div id="main">
<div id="header">
<div id="navigation">
<span></span>
<div id="navigation-anchor"></div>
<div id="navigation-bar">
<a href="../">Home</a>
<a class="on" href="./">About</a>
<a href="../forum/">Forum</a>
<a href="../documentation/">Documentation</a>
<a href="../license/">License</a>
<a href="../download/">Download</a>
</div>
</div>
<div id="banner" class="headintheclouds"> <div id="openvdb"> </div> </div>
</div>
<div id="page">
<div id="content">
<h1> About OpenVDB</h1>
<hr/>
<div class="section">
<p>OpenVDB is an Academy Award-winning C++ library comprising a hierarchical data
structure and a suite of tools for the efficient manipulation of sparse, time-varying,
volumetric data discretized on three-dimensional grids. It is based on VDB, which was
developed by Ken Museth at DreamWorks Animation, and it offers an effectively infinite
3D index space, compact storage, fast data access, and a collection of algorithms
specifically optimized for the data structure for common tasks such as filtering, CSG,
compositing, numerical simulation, sampling, and voxelization from other geometric
representations. The technical details of VDB are described in the paper
<a href="http://www.museth.org/Ken/Publications.html">
"VDB: High-Resolution Sparse Volumes with Dynamic Topology"</a>.</p>
<p>OpenVDB was developed at DreamWorks Animation primarily by
<ul class="bulleted">
<li>Ken Museth</li>
<li>Peter Cucka</li>
<li>Mihai Aldén</li>
<li>David Hill</li>
</ul>
</p>
<h2> Features and Tools </h2>
<div class="feature">
<h3>Efficient Data Structure</h3>
<p>OpenVDB represents high-resolution sparse volumes compactly both in memory and on
disk, via a novel hierarchical data structure that offers an effectively infinite 3D
index space and via a custom, lossless codec for fast file I/O.</p>
<button id="vdb-folder-btn">more</button>
</div>
<div class="feature-right">
<h3>Fast Voxel Access</h3>
<p>OpenVDB features fast (constant-time) random and sequential access to voxels. This is
the result of a new, CPU-like caching scheme and compact, hierarchical bit mask
iterators.</p>
</div>
</div> <!-- end section -->
<div id="vdb-folder" class="folder">
<button class="btn-close">x close</button>
<div id="pages">
<button id="page1" class="btn-page"> 1 </button>
<button id="page2" class="btn-page"> 2 </button>
<button id="page3" class="btn-page"> 3 </button>
</div>
</div> <!-- end section -->
<div class="section">
<div class="feature">
<h3>Conversion Tools</h3>
<p>OpenVDB volumes can be generated robustly and efficiently from polygonal meshes or
particles, and can be converted to adaptive meshes, point clouds, signed distance fields
or fog volumes.</p>
<a rel="group1" class="pop" href="../images/example_convert.jpg">
<img alt="img" src="../images/example_convert_thumb.jpg" /></a>
<a rel="group1" class="pop" href="../images/example_liquid.jpg">
<img alt="img" src="../images/example_liquid_thumb.jpg" /></a>
<button id="conversion-folder-btn">more</button>
</div>
<div class="feature-right">
<h3>Level Set Tools</h3>
<p>OpenVDB includes a large selection of level set operators, including multithreaded
advection, smoothing, filtering, surface tracking, offsetting,
resampling, rendering and near-real-time Boolean operations.</p>
<a rel="group2" class="pop" href="../images/example_advection.jpg">
<img alt="img" src="../images/example_advection_thumb.jpg" /></a>
<a rel="group2" class="pop" href="../images/example_csg.jpg">
<img alt="img" src="../images/example_csg_thumb.jpg" /></a>
</div>
</div> <!-- end section -->
<div id="conversion-folder" class="folder">
<button class="btn-close">x close</button>
<div id="pages">
<button id="conversion-page1" class="btn-page"> 1 </button>
<button id="conversion-page2" class="btn-page"> 2 </button>
<button id="conversion-page3" class="btn-page"> 3 </button>
<button id="conversion-page4" class="btn-page"> 4 </button>
<button id="conversion-page5" class="btn-page"> 5 </button>
<button id="conversion-page6" class="btn-page"> 6 </button>
</div>
</div> <!-- end section -->
<div class="section">
<div class="feature">
<h3>Filters</h3>
<p>OpenVDB’s suite of filters for smoothing and applying noise to volumes forms
the basis for DreamWorks Animation’s feature film cloud modeling toolset.</p>
<a rel="group7" class="pop" href="../images/example_filter.jpg">
<img alt="img" src="../images/example_filter_thumb.jpg" /></a>
</div>
<div class="feature-right">
<h3>Morphological Operations</h3>
<p>OpenVDB features fast morphological operations like dilation and erosion,
which are essential when dealing with dynamic volumes, for example during level set
interface tracking.</p>
<a rel="group3" class="pop" href="../images/example_morphological.jpg">
<img alt="img" src="../images/example_morphological_thumb.jpg" /></a>
</div>
<div class="feature">
<h3>Topological Operations</h3>
<p>OpenVDB’s fast topological operations (union, intersection and difference)
are the foundation for many of its sparse algorithms, in particular ones for masked
filtering and meshing.</p>
</div>
<div class="feature-right">
<h3>Geometric Transforms</h3>
<p>OpenVDB includes tools for advection of level sets or point clouds through vector
fields, with the option to constrain points to surfaces, and tools to reshape, resample
and segment volumes, highlighted by fast, seamless volumetric fracturing.</p>
<a rel="group5" class="pop" href="../images/example_fracture1.jpg">
<img alt="img" src="../images/example_fracture1_thumb.jpg" /></a>
<a rel="group5" class="pop" href="../images/example_fracture2.jpg">
<img alt="img" src="../images/example_fracture2_thumb.jpg" /></a>
</div>
<div class="feature">
<h3>Mathematical Transforms</h3>
<p>OpenVDB supports scalar- and vector-valued volumes and provides
vector calculus and related operations such as gradient, Laplacian,
closest-point transform and vector field curl and divergence.</p>
<a rel="group4" class="pop" href="../images/example_analyze.jpg">
<img alt="img" src="../images/example_analyze_thumb.jpg" /></a>
<a rel="group4" class="pop" href="../images/example_vector.jpg">
<img alt="img" src="../images/example_vector_thumb.jpg" /></a>
</div>
<div class="feature-right">
<h3>Rendering Support</h3>
<p>OpenVDB includes a standalone OpenGL volume visualizer as well as
a simple, fast command-line ray tracer that takes advantage of accelerated
ray traversal methods.</p>
<a rel="group6" class="pop" href="../images/example_gl.jpg">
<img alt="img" src="../images/example_gl_thumb.jpg" /></a>
</div>
<div class="feature">
<h3>Compositing Tools</h3>
<p>OpenVDB provides a variety of efficient tools for procedurally combining volumes.</p>
</div>
<div class="feature-right">
<h3>Python Support</h3>
<p>OpenVDB includes a Python module with functions for basic manipulation
of volumes.</p>
</div>
</div> <!-- end section -->
<div class="wide-section">
<div id="houdini-cloudfx"> </div>
<div class="sidebar">
<div id="sidebar-cloudfx">
<h3>Houdini Cloud FX</h3>
<p>The new Cloud FX tools offer an artist-friendly way of building, sculpting and
rendering cloud formations. This workflow utilizes sparse volume sculpting tools
created as part of the OpenVDB open source initiative. The integration of these tools
is the result of a direct collaboration between DreamWorks Animation and Side Effects
Software.</p>
</div>
</div> <!-- sidebar -->
</div>
<div class="section">
<h2>Additional Contributors</h2>
<div class="feature">
<h3>Side Effects Software</h3>
<p><ul class="bulleted">
<li>Neil Dickson</li>
<li>Halfdan Ingvarsson</li>
<li>Jeff Lait</li>
<li>Edward Lam</li>
<li>John Lynch</li>
<li>Adrian Saldanha</li>
</ul></p>
</div>
<div class="feature-right">
<h3>Pixar Animation Studios</h3>
<p><ul class="bulleted">
<li>Julian Fong</li>
</ul></p>
<h3>Solid Angle</h3>
<p><ul class="bulleted">
<li>Mike Farnsworth</li>
<li>Marcos Fajardo</li>
</ul></p>
</div>
<div class="feature">
<h3>Digital Domain</h3>
<p><ul class="bulleted">
<li>John Johansson</li>
<li>Fredrik Salomonsson</li>
</ul></p>
</div>
<div class="feature-right">
<h3>Double Negative</h3>
<p><ul class="bulleted">
<li>Nick Avramoussis</li>
</ul></p>
</div>
<div class="feature">
<h3>Rainmaker Entertainment</h3>
<p><ul class="bulleted">
<li>Nicholas Yue</li>
</ul></p>
</div>
<div class="feature-right">
<h3>Industrial Light & Magic</h3>
<p><ul class="bulleted">
<li>Dan Bailey</li>
<li>Rick Hankins</li>
</ul></p>
</div>
</div> <!-- end section -->
<div class="section">
<h2>Special Thanks</h2>
<div class="feature">
<h3>DreamWorks Animation</h3>
<p><ul class="bulleted">
<li>Jeff Budsberg</li>
<li>Brett Miller</li>
<li>Koen Vroeijenstijn</li>
</ul></p>
</div>
</div> <!-- end section -->
<div class="endofpage"> </div>
</div> <!-- end content -->
<div class="sidebar" id="sidebar2">
<div id="info-pane"></div>
</div> <!-- sidebar -->
</div> <!-- end page -->
<div id="footer"><p></p></div>
</div>
</body>
</html>