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files [2012/02/27 20:48]
ramcdona [af]
files [2020/04/15 13:00] (current)
jgravett Adds STEP and IGES
Line 104: Line 104:
 Vorlax case file describing the flight condition and solver parameters to be used for analysis. Vorlax case file describing the flight condition and solver parameters to be used for analysis.
 ==== csv ==== ==== csv ====
 +
 +== CompGeom.csv ==
  
 When CompGeom is executed, it can produce a wetted area/volume report file in a comma-delimited spreadsheet ready file as CompGeom.csv. ​ This file contains the same information as CompGeom.txt. ​ An example of this file for a simple model is included below. ​ The theoretical areas and volumes are the untrimmed values for each component. ​ The Wetted areas and volumes are the trimmed values for each component. When CompGeom is executed, it can produce a wetted area/volume report file in a comma-delimited spreadsheet ready file as CompGeom.csv. ​ This file contains the same information as CompGeom.txt. ​ An example of this file for a simple model is included below. ​ The theoretical areas and volumes are the untrimmed values for each component. ​ The Wetted areas and volumes are the trimmed values for each component.
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 Totals,​83.000565,​68.289142,​14.270749,​12.743678 Totals,​83.000565,​68.289142,​14.270749,​12.743678
 </​file>​ </​file>​
 +
 +== DegenGeom.csv ==
 +
 +When DegenGeom is executed, it can produce a coordinate definitions file of degenerate geometries like the surface, plate, stick and point models as detailed [[http://​www.openvsp.org/​wiki/​lib/​exe/​fetch.php?​media=degen_geom.pdf|here]]. Panel and wing camber surface coordinates,​ panel areas, and similar information are available. This ASCII file can be opened using Excel or editors like Notepad++ and may also be parsed for discretization of geometries in several different physical applications such as Euler-Bernoulli beam theory and vortex lattice solvers. This file contains the same information as DegenGeom.m.
 +
 +==== dxf ====
 +
 +[[https://​www.autodesk.com/​techpubs/​autocad/​acadr14/​dxf/​dxf_reference.htm|AutoCAD DXF]] is a drawing format developed by Autodesk for CAD. The feature lines of a vehicle in VSP form the basis for DXF exports. 3D and 2D representations are available. For a 2D drawing, up to 4 views can be laid out in a single DXF. Additional options are available to add color to layers (identified up by geometry), force feature lines at all cross-sections,​ and add projection outlines. ​
 +
 +==== facet ====
 +
 +Similar to the *.tri file format, a Facet file contains the triangulated mesh data for a surface. Two methods are available for exporting a Facet file from VSP.
 +
 +  - Unintersected components (Comp Geom): File->​Export->​Xpatch (.facet)
 +  - Intersected components (CFD Mesh): Analysis->​CFD Mesh->​Output->​.facet
 +
 ==== fel ==== ==== fel ====
  
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    ​7.66666 ​   -4.00000 ​    ​0.00000 ​      ​7.66666 ​   -4.00000 ​    ​0.00000 ​  
 </​file>​ </​file>​
 +
 +==== IGES ====
 +OpenVSP relies on the [[http://​cbernardo.github.io/​libIGES/​|libIGES]] library for exporting IGES files in accordance with the IGES v5.3 standard. The IGES format is compatible with most CAD packages. The STEP format, which functions as a predecessor to IGES, is also available. IGES exports may be of untrimmed components, trimmed components, untrimmed structural models, or trimmed structural models. ​
 +
 +  - Untrimmed components: File->​Export->​Untrimmed IGES (.igs)
 +  - Untrimmed structural models: File->​Export->​Untrimmed IGES Struct (.igs)
 +  - Trimmed components: Analysis->​Surface Intersection->​Output->​.igs
 +  - Trimmed structural models: Analysis->​FEA Mesh->​Output->​.igs
 +
 ==== inp ==== ==== inp ====
  
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 Background images can also be displayed when editing a fuselage cross section. ​ Finally, JPEG images can be used as textures applied to the surface of the model. Background images can also be displayed when editing a fuselage cross section. ​ Finally, JPEG images can be used as textures applied to the surface of the model.
 +
 +==== m ====
 +
 +== DegenGeom.m ==
 +
 +When DegenGeom is executed, it can produce a coordinate definitions file of degenerate geometries like the surface, plate, stick and point models as detailed [[http://​www.openvsp.org/​wiki/​lib/​exe/​fetch.php?​media=degen_geom.pdf|here]]. This file can be opened using [[https://​www.mathworks.com/​products/​matlab.html|Matlab]] or [[https://​www.gnu.org/​software/​octave/​|GNU Octave]] and may be used for discretization of geometries in several different physical applications such as Euler-Bernoulli beam theory and vortex lattice solvers. Panel and wing camber surface coordinates,​ panel areas, and similar information are available in a structure array data type named ''​degenGeom''​. This file contains the same information as DegenGeom.csv. ​
 +
 +An example of Unnamed_DegenGeom.m file executed in Octave is included below.
 +
 +<​file>​
 +octave:​1>​ Unnamed_DegenGeom
 +octave:​2>​ degenGeom
 +degenGeom =
 +
 +  1x2 struct array containing the fields:
 +
 +    type
 +    name
 +    geom_id
 +    surf_index
 +    main_surf_index
 +    sym_copy_index
 +    flip_normal
 +    transmat
 +    surf
 +    plate
 +    stick
 +    point
 +
 +octave:​3>​ size(degenGeom(1).surf.x) ​  % Size of array containing x-coordinates of surfaces in Component 1
 +ans =
 +
 +    6   33
 +</​file>​
  
 ==== msh ==== ==== msh ====
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 STL files contain a large amount of redundant information. ​ Consequently,​ they can be very large for a given model -- as much as six times the size of other ASCII formats. STL files contain a large amount of redundant information. ​ Consequently,​ they can be very large for a given model -- as much as six times the size of other ASCII formats.
 +
 +==== STEP ====
 +OpenVSP uses the [[http://​stepcode.github.io/​|STEPcode]] library to export Part 21 exchange files for interfacing with CAD programs. Alternatively,​ the IGES is also available for exporting to CAD. OpenVSP supports STEP export of untrimmed components, trimmed components, untrimmed structural models, and trimmed structural models. ​
 +
 +  - Untrimmed components: File->​Export->​Untrimmed STEP (.stp)
 +  - Untrimmed structural models: File->​Export->​Untrimmed STEP Struct (.stp)
 +  - Trimmed components: Analysis->​Surface Intersection->​Output->​.stp
 +  - Trimmed structural models: Analysis->​FEA Mesh->​Output->​.stp
 +
 +==== svg ====
 +
 +[[https://​www.w3.org/​TR/​SVG11/​|SVG]],​ or Scalable Vector Graphics, is an XML-based 2D vector representation of an image. In VSP, an SVG drawing of a vehicle can be exported, which can then be opened using any web browser. Similar to DXF export, options are available to force feature lines at all cross-sections or add projection outlines. Up to four views are supported for an SVG export.
 +
 ==== tga ==== ==== tga ====
  
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 Native VSP parametric geometry definition. ​ The VSP file is saved in XML format and can be relatively easily read, parsed, and updated. Native VSP parametric geometry definition. ​ The VSP file is saved in XML format and can be relatively easily read, parsed, and updated.
 +
 +
 +==== x3d ====
 +
 +Model for 3D web.  X3D is an XML successor to VRML.
 +
 +
  
  
files.1330404484.txt.gz ยท Last modified: 2018/04/01 14:40 (external edit)