STL (file format)

Example of STL vs CAD format STL (STereoLithography) is a file format native to the stereolithography CAD software created by 3D Systems. STL is also known as Standard Tessellation Language.[1] This file format is supported by many other software packages; it is widely used for rapid prototyping and computer-aided manufacturing. STL files describe only the surface geometry of a three-dimensional object without any representation of color, texture or other common CAD model attributes. The STL format specifies both ASCII and binary representations. An ASCII STL file begins with the line: solid name where name is an optional string (though if name is omitted there must still be a space after solid). facet normal ni nj nk outer loop vertex v1x v1y v1z vertex v2x v2y v2z vertex v3x v3y v3z endloop endfacet where each n or v is a floating point number in sign-mantissa 'e'-sign-exponent format, e.g., "-2.648000e-002" (noting that each "v" must be non-negative). endsolid name

OpenFlight format flt The OpenFlight format is an defacto industry standard format in the visual simulation industry, developed by Multigen Paradigm Inc. (MPI) Here is the web link: The old OpenFlight plugin osgdb_flt is moved out of the core to the deprecated SVN directory structure. svn co deprecated To use the old plugin set the environment variable OSG_OPEN_FLIGHT_PLUGIN=old Option strings for OpenFlight reader ¶ Option strings for OpenFlight writer ¶ OSG was enhanced Q1 2008 to support FLT export. If you encounter any issues with the exporter, please post to osg-users and include the following info: .osg file for scene graph you are exporting OSG_NOTIFY_LEVEL=INFO output If a crash, include a stack trace A regression test suite is available to test FLT export in OSG. MultiGen, OpenFlight, and Flight Format are registered trademarks of MultiGen Inc.

Wavefront .obj file OBJ (or .OBJ) is a geometry definition file format first developed by Wavefront Technologies for its Advanced Visualizer animation package. The file format is open and has been adopted by other 3D graphics application vendors. For the most part it is a universally accepted format. The OBJ file format is a simple data-format that represents 3D geometry alone — namely, the position of each vertex, the UV position of each texture coordinate vertex, vertex normals, and the faces that make each polygon defined as a list of vertices, and texture vertices. Vertices are stored in a counter-clockwise order by default, making explicit declaration of face normals unnecessary. OBJ coordinates have no units, but OBJ files can contain scale information in a human readable comment line. File format[edit] Lines beginning with a hash character (#) are comments. # this is a comment An OBJ file contains several types of definitions: Vertex positions (parameter space vertices)[edit] Face definitions[edit] 0.

DXF DXF (acrónimo del inglés Drawing Exchange Format) es un formato de archivo informático para dibujos de diseño asistido por computadora, creado fundamentalmente para posibilitar la interoperabilidad entre los archivos .DWG, usados por el programa AutoCAD, y el resto de programas del mercado. Este tipo de archivos apareció en 1982, junto con la primera versión del programa AutoCAD, propiedad de Autodesk. A lo largo del tiempo, los archivos DWG han ganado en complejidad, y la portabilidad mediante DXF ha perdido eficacia, pues no todas las funciones que soporta el formato nativo DWG han sido trasladadas al formato DXF. Programas que soportan la extensión DXF[editar] Véase también[editar] Enlaces externos[editar] Esta obra deriva de la traducción de AutoCAD DXF, publicada bajo la Licencia de documentación libre de GNU y la Licencia Creative Commons Atribución-CompartirIgual 3.0 Unported por editores de la Wikipedia en inglés.