U3D - Revision history

DanielJohnson at 19:42, 13 May 2009

2009-05-13T19:42:01Z

DanielJohnson at 19:39, 13 May 2009

2009-05-13T19:39:38Z

DanielJohnson at 19:29, 13 May 2009

2009-05-13T19:29:20Z

DanielJohnson at 05:38, 13 May 2009

2009-05-13T05:38:31Z

DanielJohnson at 05:38, 13 May 2009

2009-05-13T05:38:03Z

DanielJohnson at 05:36, 13 May 2009

2009-05-13T05:36:37Z

DanielJohnson at 05:34, 13 May 2009

2009-05-13T05:34:13Z

DanielJohnson at 05:30, 13 May 2009

2009-05-13T05:30:05Z

DanielJohnson at 05:29, 13 May 2009

2009-05-13T05:29:46Z

DanielJohnson at 05:29, 13 May 2009

2009-05-13T05:29:09Z

← Older revision		Revision as of 19:42, 13 May 2009
Line 1:		Line 1:
		+	[[Category:Engineering format]]
	'''Title(s):'''		'''Title(s):'''
	Universal 3D (Standardized by Ecma International as ECMA-363)		Universal 3D (Standardized by Ecma International as ECMA-363)

← Older revision		Revision as of 19:39, 13 May 2009
Line 145:		Line 145:

	*** '''Description:''' Since version 4.		*** '''Description:''' Since version 4.
		+
		+	* '''Multi-resolution models:'''
		+
		+	** '''Is Supported:''' true
		+
		+	** '''Description:''' Resolution may be changed by one vertex at a time to allow smooth interpolation of detail in real time.
		+
		+	* '''Dynamics:'''
		+
		+	** '''Kinematics:'''
		+
		+	*** '''Is Supported:''' false
		+
		+	*** '''Description:''' Skeleton organisation enables easy inverse kinematics, however, kinematics are not supported.
		+
		+	** '''Assembly:'''
		+
		+	*** '''Is Supported:''' true
		+
		+	*** '''Description:''' Skeleton representation is supported as well as segment hierarchy.
		+
		+	** '''Force(s):'''
		+
		+	*** '''Is Supported:''' false
		+
		+	*** '''Description:''' none
		+
		+	** '''Manifold volume boundary representations:'''
		+
		+	*** '''Is Supported:''' true
		+
		+	*** '''Description:''' Bounding sphere approximation is defined for each renderable block.
		+
		+	** '''Non-manifold volume boundary representations:'''
		+
		+	*** '''Is Supported:''' true
		+
		+	*** '''Description:''' Bounding sphere approximation is defined for each renderable block.
		+
		+	* '''Material Transparency:'''
		+
		+	** '''Is Supported:''' true
		+
		+	** '''Description:''' A texture may have an alpha channel.
		+
		+	'''References: ''' [http://www.ecma-international.org/publications/standards/Ecma-363.htm ECMA 363 Website] [http://en.wikipedia.org/wiki/Universal_3D U3D Wikipedia Entry]

← Older revision		Revision as of 19:29, 13 May 2009
Line 72:		Line 72:
	'''Typical Use:''' CAD re-purposing and visualisation.		'''Typical Use:''' CAD re-purposing and visualisation.

−	'''Type:''' Binary	+	'''File classification:'''
		+
		+	* '''Type:''' Binary
		+
		+	* '''Raster data:'''
		+
		+	** '''Raster data 2D:'''
		+
		+	*** '''Is Supported:''' false
		+
		+	*** '''Description:''' Mesh and Contour Data Only
		+
		+	** '''Raster data 3D:'''
		+
		+	*** '''Is Supported:''' false
		+
		+	*** '''Description:''' Mesh and Contour Data Only
		+
		+	* '''Geometric representation:'''
		+
		+	** '''Implicit Representation:'''
		+
		+	*** '''Implicit surfaces:'''
		+
		+	**** '''Is Supported:''' false
		+
		+	**** '''Description:''' Explicit surfaces only
		+
		+	*** '''Implicit curves:'''
		+
		+	**** '''Is Supported:''' false
		+
		+	**** '''Description:''' Implicit curves only
		+
		+	*** '''Point Set:'''
		+
		+	**** '''Is Supported:''' unknown
		+
		+	**** '''Description:''' unknown
		+
		+	** '''Mesh'''
		+
		+	*** '''Manifold surface meshes:'''
		+
		+	**** '''Is Supported:''' true
		+
		+	**** '''Description:''' Triangle meshes supported.
		+
		+	*** '''Manifold volume meshes:'''
		+
		+	**** '''Is Supported:''' false
		+
		+	**** '''Description:''' No voxel support
		+
		+	** '''Parametric representation'''
		+
		+	*** '''Parametric curves:'''
		+
		+	**** '''Is Supported:''' true
		+
		+	**** '''Description:''' Since version 4, support for Uniform and Non-Uniform, Rational and Non-Rational Free-Form Curves and Surfaces exists.
		+
		+	** '''Contour sets'''
		+
		+	*** '''Is Supported:''' false
		+
		+	*** '''Description:''' Only mesh and parametric surfaces.
		+
		+	** '''NURBS'''
		+
		+	*** '''Is Supported:''' true
		+
		+	*** '''Description:''' Since version 4.

← Older revision		Revision as of 05:38, 13 May 2009
Line 72:		Line 72:
	'''Typical Use:''' CAD re-purposing and visualisation.		'''Typical Use:''' CAD re-purposing and visualisation.

−	Type- Binary	+	'''Type:''' Binary

@@ Line 42: / Line 42: @@
 '''Example:'''
-'''Identifier:''' [http://www.ecma-international.org/publications/standards/Ecma-363.htm]
+'''Identifier:''' [http://www.ecma-international.org/publications/standards/Ecma-363.htm ECMA 363 Website]
-'''Documentation:''' [http://www.ecma-international.org/cgi-bin/counters/unicounter.pl?name=ECMA-363_4thedition&deliver=http://www.ecma-international.org/publications/files/ECMA-ST/ECMA-363%204th%20edition.pdf ]
+'''Documentation:''' [http://www.ecma-international.org/cgi-bin/counters/unicounter.pl?name=ECMA-363_4thedition&deliver=http://www.ecma-international.org/publications/files/ECMA-ST/ECMA-363%204th%20edition.pdf  U3D Specification]
 '''File Extensions:''' .u3d

@@ Line 58: / Line 58: @@
 '''Rights:''' GNU Free Document License
-Standardization - 	Standardized in 2005 by ISO/IEC
+'''Sustainability Factors:'''
-Adoption-		Adopted by Adobe as their default format for saving 3D graphics in PDFs and Photoshop.
+* '''Standardisation:''' Standardised in 2005 by ISO/IEC
-Self Documentation-	None
+* '''Adoption:''' Adopted by Adobe as their default format for saving 3D graphics in PDFs and Photoshop.
-External Dependencies-	None
+* '''Self Documentation:''' None
-Technical Protection-	None
+* '''External Dependencies:''' None
-Typical Use-		CAD repurposing and visualization.
+* '''Technical Protection Consideration:''' None
 Type-			Binary

← Older revision		Revision as of 05:34, 13 May 2009
Line 36:		Line 36:

	* '''Family Format:''' None		* '''Family Format:''' None
		+
		+	'''History:'''
		+	In 2004, Ecma International assembled the 43rd Technical Committee comprised of Intel, Boeing, HP, Adobe Systems, Bentley Systems and Right Hemisphere. The focus of this committee was to create a unified format for the development of 3D graphics. Since then it has gone through 3 revisions, two pertaining to changes made after the submission to ISO/IEC in 2005, and one in 2007 to add support for Uniform and Non-Uniform Rational and Non Rational Free-From Curves and Surfaces.
		+
		+	'''Example:'''
		+
		+	'''Identifier:''' [http://www.ecma-international.org/publications/standards/Ecma-363.htm]
		+
		+	'''Documentation:''' [http://www.ecma-international.org/cgi-bin/counters/unicounter.pl?name=ECMA-363_4thedition&deliver=http://www.ecma-international.org/publications/files/ECMA-ST/ECMA-363%204th%20edition.pdf ]
		+
		+	'''File Extensions:''' .u3d
		+
		+	'''Applications''' Adobe Acrobat, Adobe Reader, Photoshop CS3, Poser 7, DAZ\|Studio, MeshLab, Blender
		+
		+	* '''Native Applications:''' Adobe Acrobat and Adobe Reader (since version 7)
		+
		+	* '''Interoperable Applications:''' Photoshop CS3, Poser 7, DAZ\|Studio, MeshLab, Blender
		+
		+	'''Formats:''' model/u3d
		+
		+	'''Rights:''' GNU Free Document License
		+
		+	Standardization - Standardized in 2005 by ISO/IEC
		+
		+	Adoption- Adopted by Adobe as their default format for saving 3D graphics in PDFs and Photoshop.
		+
		+	Self Documentation- None
		+
		+	External Dependencies- None
		+
		+	Technical Protection- None
		+
		+	Typical Use- CAD repurposing and visualization.
		+
		+	Type- Binary

@@ Line 26: / Line 26: @@
 th Edition released in 2007 with added support for Uniform and Non-Uniform Rational and Non Rational Free-From Curves and Surfaces.
-* '''Contains:'''
+* '''Contains:''' None
 None
 * '''Syntax:'''

← Older revision		Revision as of 05:29, 13 May 2009
Line 16:		Line 16:
	'''Relationships:'''		'''Relationships:'''
	The first version was created by Technical Committee 43 assembled by Ecma International. It was an attempt to create a unified open modeling format.		The first version was created by Technical Committee 43 assembled by Ecma International. It was an attempt to create a unified open modeling format.
		+
		+	* '''Previous Versions:'''
		+	1st Edition released in 2004 by Technical Committee 43 (composed of the above contributors).
		+
		+	2nd Edition released in 2005 to the ISO/IEC for fast track processing.
		+
		+	3rd Edition released in 2006 with corrections received by the ISO/IEC DIS ballot process.
		+
		+	4th Edition released in 2007 with added support for Uniform and Non-Uniform Rational and Non Rational Free-From Curves and Surfaces.
		+
		+	'''Contains:'''
		+	None
		+
		+	'''Syntax:'''
		+	A file is structured as a sequence of blocks. The first block is the File Header Block. The File Header Block is followed by declaration blocks. Continuation blocks may follow the declaration blocks. Each block contains size fields so that the loader can determine the end of a block if the data in that block is not required or if a decoder for that block type is unavailable.
		+
		+	Each block in the file, whether it is the Header Block, a Declaration Block or a Continuation Block, will follow a similar format. They begin with a Block Type section, a Data Size section and a Meta Data Size section. These sections say how the remaining sections of the Block will be sized. The start of these three beginning sections are all 32 bit aligned.
		+
		+	The following blocks are the Data block, the Data Padding Block and the MetaData and MetaData Padding blocks. The two padding blocks are used to ensure 32 bit alignment for all of the blocks, and therefore are variable size depending on their preceding blocks. The Data block contains the data for this block. The Meta Data block contains a set of Key/Value pairs to be interpreted based on the contents of the file.
		+
		+	'''Family Format:'''
		+	None