Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this 3D Revision Control Framework Jozef Doboš & Anthony Steed Department of Computer Science University College London August 5, 2012

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this Introduction  3D models grow in complexity  Artists and engineers collaborate asynchronously  File systems pose serious drawbacks

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this Contributions  How to maintain distributed open repository for revising 3D models  How scene graph of 3D assets can be stored in NoSQL DB (MongoDB)  How to extend the DB to store revision history  Tier 1: A stand-alone GUI with conflict detection and resolution  Tier 2: A secondary read-only GUI via WebGL and Java

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this Previous Work Asset management and version control  High-end CAD modeling packages:  Bentley Assetvise  Dassault Catia  Software engineering:  SVN, Git, Perforce...  3ds Max, Blender... + filesystems  Locking

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this Previous Work Edit logging  Nonlinear Revision Control for Images [Chen et al. 2011]  MeshFlow: Interactive Visualization of Mesh Construction Sequences [Denning et al. 2011]  VisTrails Provenance Explorer for Maya Network distribution  XML3D – Interactive 3D Graphics for the Web [Sons et al. 2010]  A scalable architecture for the HTML5/X3D integration model X3DOM [Behr et al. 2010]  SceneJS

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this Aim  Support non-linear concurrent modeling  Become agnostic to any specific modeling software  Make one DB store the scene and its revision history  Hence separate modeling from its long-term storage

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this Framework Overview

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this Framework Overview  3 rd party modeling software saves 3D scene locally

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this Framework Overview  Tier 1 GUI imports/exports various 3D file formats  Visualizes revisions and differences  Saves scene components in remote 3D repository

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this Framework Overview  Domain specific database  Tracks revision history on individual scene nodes  Supports sub-scene retrieval

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this Framework Overview  Tier 2 GUI (subset of Tier 1 functionality)  Inspects repository, retrieves and visualizes revisions  Does not modify the models nor their history

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this Framework Features 1. Support for wide range of assets 2. Delta changes stored alongside non-linear history 3. Easy access control and sub-object retrieval 4. Interactive 3D diff tool 5. Web interface for repository inspection

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this 3D Repository (DB) Scene Graph (SG)  Directed Acyclic Graph  SG Node: scene component (binary blob)  Metadata = (ID, R#)  Used by:  [Zeleznik et al. 2000]  [Berthelot et al. 2011] Revision History (RH)  Directed Acyclic Graph  RH Node: revision  Used by:  Git, SVN, Mercurial,...  [Chen et al. 2011]

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this Revision History Rev 0 Branch Trunk Rev 8

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this Revision Management Revision Retrieval  Return all the newest SG nodes for a given revision number Revision Commit  Delta changes as new revisions  Potential conflicts → need conflict resolution Node deletion  Store NULL in the next revision  Recursively check children

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this 3D Diff and Merge

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this 3D Diff and Merge  Find corresponding nodes in A, B based on ID  Binary compare for differences

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this 3D Diff and Merge  Identical→ no modification  Identical nodes → no modification

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this 3D Diff and Merge → conflict  Discrepancies in nodes → conflict  Select A or B or export into 3 rd party editor

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this 3D Diff and Merge  Given AncestorAB more states can be detected

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this 3D Diff and Merge  Identical→ no modification (as before)  Identical nodes → no modification (as before)

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this 3D Diff and Merge  Some conflicts can now be automatically resolved

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this Prototype Implementation MongoDB  NoSQL (schemaless)  Geospatial indexing  Data as Binary JSON (BSON) – little-endian serialized C types  UUID as node identifiers  Two collections (one for each DAG – SG and RH)

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this DAG as Flat Collection   is a parent-child relationship  V is a logical disjunction

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this Tier 1 - 3D Revision Control Viewer  Written in C++ and Qt  Open Asset Import Library (Assimp) to handle models  Converts unified scene graph into collection of BSON  Handles all version control logic  Performs visual 3D diff  Exports to common file formats

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this Tier 1 - 3D Revision Control Viewer

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this 3D Diff Tool

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this Tier 2 - 3D Web Client  Driven by JavaScript  MongoDB Java driver loads BSON from DB  WebGL renderer displays in web browsers

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this Tier 2 - 3D Web Client

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this Discussion  Interaction via import/export of 3D files  Files now considered only temporary representation  Smallest unit of change is SG node (BSON document)  Each SG node can be 16MB max (automated multiple documents workaround)  Assume the 3D file to preserve metadata  Lack of data validation on insertion

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this Future Work  Android and Java Webstart Tier 2 viewers  Store other types of data  Locking and hybrid locks with geometric constrains  Search via spatial queries  Integrate into existing industrial pipelines  Open crowd-sourcing of 3D models

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this Future Work  Possible direct connection from editing software  Hides the revision control layer from the user

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this Conclusions  Novel approach to storage and revision control of 3D assets  Represented hierarchical scene graphs in DB  Preserved associated revision history  Successfully decoupled modeling from long term storage

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this Sponsors Arup Foresight  UK Engineering and Physical Sciences Research Council  UCL Engineering Doctorate Centre in Virtual Environments, Imaging & Visualisation 

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this Talk Invitation 3D Diff: An Interactive Approach to Mesh Differencing and Conflict Resolution  Session: Model Stories  Date: Tuesday, 7 August  Time: 2:00PM – 3:30PM  Location: Room 406AB

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this Google Chrome

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this Materials

Edit this text to create a Heading  This subtitle is 20 points  Bullets are blue  They have 110% line spacing, 2 points before & after  Longer bullets in the form of a paragraph are harder to read if there is insufficient line spacing. This is the maximum recommended number of lines per slide (seven).  Sub bullets look like this King’s Cross