COLLADA BOF Siggraph 2012 Neil Trevett, NVIDIA, Khronos President Fabrice Robinet, Motorola Mobility, COLLADA Chair

Transcription

1 COLLADA BOF Siggraph 2012 Neil Trevett, NVIDIA, Khronos President Fabrice Robinet, Motorola Mobility, COLLADA Chair Copyright Khronos Group 2012 Page 1

2 Copyright Khronos Group 2012 Page 2 Welcome! Update on COLLADA Activities since GDC Meetup - Neil Trevett - Khronos COLLADA and WebGL - Fabrice Robinet Motorola Mobility Demos - COLLADA2JSON: - Fabrice Robinet, Motorola Mobility - Unity Exporter - Remi Arnaud, AMD - Machinima evolves - with COLLADA and Poser Pro: - Ulrich Klumpp, Smith Micro - COLLADA import on Mountain Lion with SceneKit: - Fabrice Robinet, Motorola Mobility Discussion - Your feedback and suggestions

3 Copyright Khronos Group 2012 Page 3 COLLADA = XML Interchange of 3D Assets COLLADA is a XML database schema for 3D assets - Can hold everything to do with a scene: geometry with full skinning, advanced material and visual effects, animation, physical properties and collisions COLLADA can be used to transport 3D assets between applications - Enables binding of diverse DCC and 3D processing tools into a production pipeline COLLADA is an open, archive-grade format that retains meta information - Retains all information - even multiple versions of the same asset COLLADA is NOT an transport format - Conditioning pipelines optimize the asset database for a target device or usage

4 Copyright Khronos Group 2012 Page 4 COLLADA Industry Momentum Apple - Native support for COLLADA in MacOS Lion and ibooks - Used in Scene Kit framework in Mountain Lion to easily load and render virtual 3D scenes Google - Uses COLLADA in KML for Google Earth Adobe - Imports COLLADA directly in Creative Suite AutomationML - CAD industry are investing in COLLADA 1.5 for planning robotic factories

5 Copyright Khronos Group 2012 Page 5 Breaking News! COLLADA is now an ISO Standard! - COLLADA has been published as ISO PAS by ISO TC184 SC &ics2=040&ics3=40&csnumber=59902 Industrial automation systems and integration -- COLLADA digital asset schema specification for 3D visualization of industrial data - The purpose of ISO/PAS 17506:2012 is to provide a specification for the COLLADA schema in sufficient detail to enable software developers to create tools to process COLLADA resources. In particular, it is relevant to those who import to or export from digital content creation (DCC) applications, 3D interactive applications and tool chains, prototyping tools, real-time visualization applications such as those used in the video game and movie industries, and CAD tools ISO Standardization is an important milestone - Key for confidence for industry investment and use as long-term asset archival

6 COLLADA Community Engagement OpenCOLLADA Importer/Exporter and COLLADA Test Suite now on Github Free to use! - Encouraging widespread toolchain testing COLLADA Test Framework Copyright Khronos Group 2012 Page 6

7 Copyright Khronos Group 2012 Page 7 Khronos OpenCOLLADA RFQ We have list of known bugs with OpenCOLLADA - We want to get these bugs fixed quickly to get to stable baseline for community support and development Khronos has funded a $20K project to fix OpenCOLLADA bugs - Issued a Request for Quotations (RFQ) - Open to anyone to bid - looking for bidders with COLLADA experience - If any questions Neil or Fabrice - ntrevett@nvidia.com or cmg473@motorola.com Aiming to finalize vendor selection in September

8 Need for 3D Transmission Standard? Efficient codecs to compress and store binary 3D asset blobs - Geometry, textures, materials, animations, physics Separate from scene graph description e.g. WebGL could use JSON - Combine with RESTful APIs in Web services approach to flexible streaming and LOD management - Many initiatives under way time for communication and collaboration? - MPEG 3D Mesh Progressive Streaming (3DMC), Bones Based Animation (BBA) - Google Body compression - Delta and ZigZag encoding - COLLADA2JSON at COLLADA working group - Web3D Consortium Fraunhofer, significant papers at Web3D Conference An effective and widely adopted codec ignites previously unimagined opportunities for a media type Audio Video Images 3D MP3 H.264 PNG/JPEG?? Copyright Khronos Group 2012 Page 8

9 Copyright Khronos Group 2012 Page 9 3D Codec Concepts - Transmission Format enables reliable encoding and decoding of 3D Assets - Encoding/Decoding can be independent of server/client - Standardized, widely-used codec catalyzes optimized implementations Challenges - Complexity and variety of 3D asset types to be processed - Efficiency of general codec versus application-specific encoding schema RestFUL APIs for client/server interrogation and cooperation 3D Asset Server Encode 3D Assets Decode 3D Assets 3D Client Scenegraph transmitted separately to asset blobs

10 Copyright Khronos Group 2012 Page 10 Transmission Format Collaboration Exploring multi-sdo (Standard Defining Organization) collaboration - To accelerate transmission format exploration and development Khronos has drafted liaison MOU to encapsulate this model - Feedback welcome! - If you are an SDO interested to explore participation ntrevett@nvidia.com 1. Members of Participating SDOs can attend liaison working group 4. Each SDO ratifies specification to be royalty free and publicly distributes + Other SDOs! Liaison Working Group 3. Liaison Working sends draft spec to each SDO for ratification - using SDO s own ratification process for royalty-free specifications 2. Liaison Working Group experiments with prototype implementations and drafts Specification

11 Copyright Khronos Group 2012 Page 11 COLLADA and WebGL WebGL as a common denominator to import 3D Contents - Bridge the gap between COLLADA and WebGL JSON format driven by WebGL - WebGL requires a final baked format - Unique indices buffer, requires shaders, split meshes > indices - JSON describes the scene graph - a separate binary blob all geometry - Buffers description compliant with typed arrays - Designed to support with compression - Ongoing Rest3D support ( Implementation: COLLADA2JSON by Motorola Mobility - Uses OpenCOLLADA to convert COLLADA assets to JSON for use in WebGL -

12 Copyright Khronos Group 2012 Page 12 Demos COLLADA2JSON: - Fabrice Robinet Motorola Mobility. Unity Exporter: - Remi Arnaud Machinima evolves - with COLLADA and Poser Pro: - Ulrich Klumpp - Smith Micro COLLADA import on Mountain Lion with SceneKit: - Fabrice Robinet Motorola Mobility

13 Copyright Khronos Group 2012 Page 13 Discussion OpenCOLLADA - Any feedback if you have tried to use the source? - Questions on RFQ? - Next priorities? Conformance Test Suite - Cross-platform porting? - How best to support? - Better Web integration? Core Profile - Defining

14 Copyright Khronos Group 2012 Page 14 Get Involved! COLLADA Resources including forums and social media - Sign up for the public list To be continued on GitHub