Difference between revisions of "SMF"

From GICL Wiki
Jump to: navigation, search
 
Line 1: Line 1:
 
[[Category:Engineering format]]
 
[[Category:Engineering format]]
'''Title(s):''' [[Title::SMF]] - SMF, Simple Model Format
+
'''Title(s):''' [[Title::SMF, Simple Model Format]]
  
'''Version ID:''' [[Version ID::N/A]] - N/A
+
'''Version ID:''' [[Version ID::N/A]]
  
'''Date released:''' [[Version Date released::]] - Date that the version was released.
+
'''Date released:''' [[Version Date released::N/A]]
  
'''Date:''' [[Format Date::]] - Date the format was created (YYYY-MM-DD)
+
'''Date:''' [[Format Date::N/A]]
  
'''Creator(s):''' [[Creator::N/A]] - N/A
+
'''Creator(s):''' [[Creator::N/A]]
  
'''Contributor(s):''' [[Contributor::N/A]] - N/A
+
'''Contributor(s):''' [[Contributor::N/A]]
  
 
'''Relationships:''' The SMF format is based on Wavefront's OBJ format. Some SMF files are valid OBJ files.
 
'''Relationships:''' The SMF format is based on Wavefront's OBJ format. Some SMF files are valid OBJ files.
Line 22: Line 22:
 
* '''Family Format(s):'''N/A
 
* '''Family Format(s):'''N/A
  
'''Description:''' The SMF format describes triangular meshes by defining each 3D vertex used by the  
+
'''Description:''' The SMF format describes triangular meshes by defining each 3D vertex used by the model. Triangles are
  
model. Triangles are defined using the index of each vertex. This makes them difficult to modify by hand, but saves disk  
+
defined using the index of each vertex. This makes them difficult to modify by hand, but saves disk space. Each vertex may
  
space. Each vertex may also have a normal, color, texture, or texture coordinate associated with it. Some affine  
+
also have a normal, color, texture, or texture coordinate associated with it. Some affine transformations (no shearing) can
  
transformations (no shearing) can be applied to sets of vertices to simplify the definition of a mesh or make it easier to  
+
be applied to sets of vertices to simplify the definition of a mesh or make it easier to modify components within a model.
  
modify components within a model.
+
'''History:''' Historical description depicting major events surrounding development, creation, and maintenance of this
  
'''History:''' Historical description depicting major events surrounding development, creation, and
+
format.
 
+
maintenance of this format.
+
  
 
'''Example(s):''' [[Example::http://www.cs.drexel.edu/~david/Classes/CS586/Models/]]
 
'''Example(s):''' [[Example::http://www.cs.drexel.edu/~david/Classes/CS586/Models/]]
Line 77: Line 75:
 
** '''Raster data 2D:'''
 
** '''Raster data 2D:'''
 
*** '''Is Supported:''' [[File Classification Raster Data 2D - Is Supported::false]]
 
*** '''Is Supported:''' [[File Classification Raster Data 2D - Is Supported::false]]
*** '''Description:''' [[File Classification Raster Data 2D - Description::The model may contain texture coordinates, but not the texture data itself.]]
+
*** '''Description:''' [[File Classification Raster Data 2D - Description::The model may contain texture coordinates, but  
 +
 
 +
not the texture data itself.]]
 
** '''Raster data 3D:'''
 
** '''Raster data 3D:'''
 
*** '''Is Supported:''' [[File Classification Raster Data 3D - Is Supported::false]]
 
*** '''Is Supported:''' [[File Classification Raster Data 3D - Is Supported::false]]
*** '''Description:''' [[File Classification Raster Data 3D - Description::The model may contain texture coordinates, but not the texture data itself.]]
+
*** '''Description:''' [[File Classification Raster Data 3D - Description::The model may contain texture coordinates, but  
 +
 
 +
not the texture data itself.]]
 
* '''Geometric representation:'''
 
* '''Geometric representation:'''
 
** '''Implicit representation:'''
 
** '''Implicit representation:'''
 
*** '''Implicit surfaces:'''
 
*** '''Implicit surfaces:'''
 
**** '''Is Supported:''' [[File Classification Implicit Surfaces - Is Supported::false]]
 
**** '''Is Supported:''' [[File Classification Implicit Surfaces - Is Supported::false]]
**** '''Description:''' [[File Classification Implicit Surfaces - Description::The model can only contain triangles, not curves or surfaces.]]
+
**** '''Description:''' [[File Classification Implicit Surfaces - Description::The model can only contain triangles, not  
 +
 
 +
curves or surfaces.]]
 
*** '''Implicit curves:'''
 
*** '''Implicit curves:'''
 
**** '''Is Supported:''' [[File Classification Implict Curves - Is Supported::false]]
 
**** '''Is Supported:''' [[File Classification Implict Curves - Is Supported::false]]
**** '''Description:''' [[File Classification Implicit Curves - Description::The model can only contain triangles, not curves or surfaces.]]
+
**** '''Description:''' [[File Classification Implicit Curves - Description::The model can only contain triangles, not  
 +
 
 +
curves or surfaces.]]
 
*** '''Point set:'''
 
*** '''Point set:'''
 
**** '''Is Supported:''' [[File Classification Point Set - Is Supported::true]]
 
**** '''Is Supported:''' [[File Classification Point Set - Is Supported::true]]
**** '''Description:''' [[File Classification Point Set - Description::The model is defined by connecting specified points to form triangles.]]
+
**** '''Description:''' [[File Classification Point Set - Description::The model is defined by connecting specified points  
 +
 
 +
to form triangles.]]
 
** '''Mesh:'''
 
** '''Mesh:'''
 
*** '''Manifold surface meshes:'''
 
*** '''Manifold surface meshes:'''
 
**** '''Is Supported:''' [[File Classification Mainfold Surface Meshes - Is Supported::true]]
 
**** '''Is Supported:''' [[File Classification Mainfold Surface Meshes - Is Supported::true]]
**** '''Description:''' [[File Classification Manifold Surface Meshes - Description::The SMF format supports any  
+
**** '''Description:''' [[File Classification Manifold Surface Meshes - Description::The SMF format supports any triangular
  
triangular mesh, manifold or not.]]
+
mesh, manifold or not.]]
 
*** '''Manifold volume meshes:'''
 
*** '''Manifold volume meshes:'''
 
**** '''Is Supported:''' [[File Classification Manifold Volume Meshes - Is Supported::true]]
 
**** '''Is Supported:''' [[File Classification Manifold Volume Meshes - Is Supported::true]]
**** '''Description:''' [[File Classification Manifold Volume Meshes - Description::The SMF format supports any  
+
**** '''Description:''' [[File Classification Manifold Volume Meshes - Description::The SMF format supports any triangular
  
triangular mesh, manifold or not.]]
+
mesh, manifold or not.]]
 
*** '''Non-manifold meshes:'''
 
*** '''Non-manifold meshes:'''
 
**** '''Is Supported:''' [[File Classification Non-manifold Meshes - Is Supported::true]]
 
**** '''Is Supported:''' [[File Classification Non-manifold Meshes - Is Supported::true]]
**** '''Description:''' [[File Classification Non-manifold Meshes - Description::The SMF format supports any  
+
**** '''Description:''' [[File Classification Non-manifold Meshes - Description::The SMF format supports any triangular
  
triangular mesh, manifold or not.]]
+
mesh, manifold or not.]]
 
** '''Parametric representation:'''
 
** '''Parametric representation:'''
 
*** '''Parametric surfaces:'''
 
*** '''Parametric surfaces:'''
 
**** '''Is Supported:''' [[File Classification Parametric Surfaces - Is Supported::false]]
 
**** '''Is Supported:''' [[File Classification Parametric Surfaces - Is Supported::false]]
**** '''Description:''' [[File Classification Parametric Surfaces - Description::The file may contain a triangular  
+
**** '''Description:''' [[File Classification Parametric Surfaces - Description::The file may contain a triangular mesh
  
mesh that approximates a parametric surface, but it cannot store the equations that define the parametric surface.]]
+
that approximates a parametric surface, but it cannot store the equations that define the parametric surface.]]
 
*** '''Parametric curves:'''
 
*** '''Parametric curves:'''
 
**** '''Is Supported:''' [[File Classification Parametric Curves - Is Supported::false]]
 
**** '''Is Supported:''' [[File Classification Parametric Curves - Is Supported::false]]
**** '''Description:''' [[File Classification Parametric Curves - Description::No curves are supported, just  
+
**** '''Description:''' [[File Classification Parametric Curves - Description::No curves are supported, just triangles.]]
 
+
triangles.]]
+
 
** '''Contour sets:'''
 
** '''Contour sets:'''
 
*** '''Is Supported:''' [[File Classification Contour Sets - Is Supported::false]]
 
*** '''Is Supported:''' [[File Classification Contour Sets - Is Supported::false]]
Line 127: Line 133:
 
* '''Multi-resolution models:'''
 
* '''Multi-resolution models:'''
 
** '''Is Supported:''' [[File Classification Multi-resolution Models - Is Supported::false]]
 
** '''Is Supported:''' [[File Classification Multi-resolution Models - Is Supported::false]]
** '''Description:''' [[File Classification Multi-resolution Models - Description::Two disjoint models could be  
+
** '''Description:''' [[File Classification Multi-resolution Models - Description::Two disjoint models could be specified
  
specified in one SMF file, but there is no notation for specifying that two distinct models exist and one is a  
+
in one SMF file, but there is no notation for specifying that two distinct models exist and one is a lower-resolution model
  
lower-resolution model of the other.]]
+
of the other.]]
 
* '''Dynamics:'''
 
* '''Dynamics:'''
 
** '''Kinematics:'''
 
** '''Kinematics:'''
Line 154: Line 160:
 
** '''Manifold volume boundary representations:'''
 
** '''Manifold volume boundary representations:'''
 
*** '''Is Supported:''' [[File Classification Manifold Volume Boundary Representation - Is Supported::true]]
 
*** '''Is Supported:''' [[File Classification Manifold Volume Boundary Representation - Is Supported::true]]
*** '''Description:''' [[File Classification Manifold Volume Boundary Representation - Description::As long as each  
+
*** '''Description:''' [[File Classification Manifold Volume Boundary Representation - Description::As long as each volume
  
volume has a polygonal representation, the model can be represented as a triangular mesh and saved as an SMF file.]]
+
has a polygonal representation, the model can be represented as a triangular mesh and saved as an SMF file.]]
 
** '''Non-manifold boundary representations:'''
 
** '''Non-manifold boundary representations:'''
 
*** '''Is Supported:''' [[File Classification Non-manifold Boundary Representation - Is Supported::true]]
 
*** '''Is Supported:''' [[File Classification Non-manifold Boundary Representation - Is Supported::true]]
*** '''Description:''' [[File Classification Non-manifold Boundary Representation - Description::Non-manifold geometry  
+
*** '''Description:''' [[File Classification Non-manifold Boundary Representation - Description::Non-manifold geometry that
  
that can be represented as a set of triangles can be represented by an SMF file.]]
+
can be represented as a set of triangles can be represented by an SMF file.]]
 
* '''Material transparency:'''
 
* '''Material transparency:'''
 
** '''Is Supported:''' [[File Classification Material Transparency - Is Supported::true]]
 
** '''Is Supported:''' [[File Classification Material Transparency - Is Supported::true]]

Latest revision as of 15:26, 13 May 2009

Title(s): SMF, Simple Model Format

Version ID: N/A

Date released: N/A

Date: N/A

Creator(s): N/A

Contributor(s): N/A

Relationships: The SMF format is based on Wavefront's OBJ format. Some SMF files are valid OBJ files.

  • Previous Version(s): N/A
  • Contains: N/A
  • Syntax Format(s): N/A
  • Family Format(s):N/A

Description: The SMF format describes triangular meshes by defining each 3D vertex used by the model. Triangles are

defined using the index of each vertex. This makes them difficult to modify by hand, but saves disk space. Each vertex may

also have a normal, color, texture, or texture coordinate associated with it. Some affine transformations (no shearing) can

be applied to sets of vertices to simplify the definition of a mesh or make it easier to modify components within a model.

History: Historical description depicting major events surrounding development, creation, and maintenance of this

format.

Example(s): http://www.cs.drexel.edu/~david/Classes/CS586/Models/

Identifier: N/A

Documentation: http://people.sc.fsu.edu/~burkardt/data/smf/smf.html

File Extensions: smf

'Applications:

  • Native application(s): N/A

Magic numbers: none

Format(s): N/A

Rights: N/A

Sustainability Factors:

  • Standardization: none
  • Adoption: N/A
    • Licensing and patent claims: none
  • External dependencies: none
  • Technical protection considerations: N/A

Typical use: Triangular mesh

File classification:

  • Type {Binary, Text}: Text
  • Raster data:
    • Raster data 2D:
      • Is Supported: false
      • Description: The model may contain texture coordinates, but

not the texture data itself.warning.png"The model may contain texture coordinates, but

not the texture data itself." cannot be used as a page name in this wiki.

    • Raster data 3D:
      • Is Supported: false
      • Description: The model may contain texture coordinates, but

not the texture data itself.warning.png"The model may contain texture coordinates, but

not the texture data itself." cannot be used as a page name in this wiki.

  • Geometric representation:
    • Implicit representation:
      • Implicit surfaces:
        • Is Supported: false
        • Description: The model can only contain triangles, not

curves or surfaces.warning.png"The model can only contain triangles, not

curves or surfaces." cannot be used as a page name in this wiki.

      • Implicit curves:
        • Is Supported: false
        • Description: The model can only contain triangles, not

curves or surfaces.warning.png"The model can only contain triangles, not

curves or surfaces." cannot be used as a page name in this wiki.

      • Point set:
        • Is Supported: true
        • Description: The model is defined by connecting specified points

to form triangles.warning.png"The model is defined by connecting specified points

to form triangles." cannot be used as a page name in this wiki.

    • Mesh:
      • Manifold surface meshes:
        • Is Supported: true
        • Description: The SMF format supports any triangular

mesh, manifold or not.warning.png"The SMF format supports any triangular

mesh, manifold or not." cannot be used as a page name in this wiki.

      • Manifold volume meshes:
        • Is Supported: true
        • Description: The SMF format supports any triangular

mesh, manifold or not.warning.png"The SMF format supports any triangular

mesh, manifold or not." cannot be used as a page name in this wiki.

      • Non-manifold meshes:
        • Is Supported: true
        • Description: The SMF format supports any triangular

mesh, manifold or not.warning.png"The SMF format supports any triangular

mesh, manifold or not." cannot be used as a page name in this wiki.

    • Parametric representation:
      • Parametric surfaces:
        • Is Supported: false
        • Description: The file may contain a triangular mesh

that approximates a parametric surface, but it cannot store the equations that define the parametric surface.warning.png"The file may contain a triangular mesh

that approximates a parametric surface, but it cannot store the equations that define the parametric surface." cannot be used as a page name in this wiki.

in one SMF file, but there is no notation for specifying that two distinct models exist and one is a lower-resolution model

of the other.warning.png"Two disjoint models could be specified

in one SMF file, but there is no notation for specifying that two distinct models exist and one is a lower-resolution model

of the other." cannot be used as a page name in this wiki.

  • Dynamics:
    • Kinematics:
      • Is Supported: false
      • Description: You can use some affine transformations (no

shearing) within the file to specify parts of the mesh. You cannot specify bounds on these transformations, so this feature

is intended to simplify the file, not allow for moving parts.

surface in the BRep model is a polygon, this model can be represented as a triangular mesh and saved as an SMF file.warning.png"As long as every

surface in the BRep model is a polygon, this model can be represented as a triangular mesh and saved as an SMF file." cannot be used as a page name in this wiki.

    • Manifold volume boundary representations:
      • Is Supported: true
      • Description: As long as each volume

has a polygonal representation, the model can be represented as a triangular mesh and saved as an SMF file.warning.png"As long as each volume

has a polygonal representation, the model can be represented as a triangular mesh and saved as an SMF file." cannot be used as a page name in this wiki.

    • Non-manifold boundary representations:
      • Is Supported: true
      • Description: Non-manifold geometry that

can be represented as a set of triangles can be represented by an SMF file.warning.png"Non-manifold geometry that

can be represented as a set of triangles can be represented by an SMF file." cannot be used as a page name in this wiki.

  • Material transparency:
    • Is Supported: true
    • Description: A color can be associated with each

vertex.warning.png"A color can be associated with each

vertex." cannot be used as a page name in this wiki.

References: http://people.sc.fsu.edu/~burkardt/data/smf/smf.html