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Formate CAD Native
Native CAD Formats refers to formats that are proprietary to specific CAD systems. If you have the ability to read these formats, they will have the most information and be more accurate than Geometric Modeling Kernel formats or Neutral CAD formats.
For this reason it’s always a good idea to ask your customer for the native format (assuming you have the capability to read the the native format).
Format | Extensions | Precise or Tessellated | Vendor | TransMagic Read | TransMagic Write | Notes |
---|---|---|---|---|---|---|
AutoCAD | .dwg, .dxf | Both | Autodesk | R9-2017 | R9-2017 | DXF is ASCII |
CATIA V4 | .model | Precise | Dassault | 4.1.9 – 4.2.4 | 4.1.9 – 4.2.4 | |
CATIA V5, V6 | CATPart, CATProduct, CGR | Both | Dassault | 15-2018 (R28) | 15-2018 (R28) | File-based support for V6. Note that CGR is Visrep. |
Creo | .prt, .asm | Precise | PTC | Up to 3.0 | ||
Microstation | .dgn | Precise | Bentley Systems | Up to V7 | ||
NX, Unigraphics | .prt, .jt, .j_t | Precise | Siemens | NX up to NX11, JT up to 10.2 | JT up to 10.2 | JT is a compressed visualization format ideal for viewing large assemblies. |
Pro/E | .prt, .asm | Precise | PTC | Up to Wildfire 3 | ||
Inventor | ipt, iam | Both | Autodesk | Up to 2018 | ||
SOLIDWORKS | .sldprt, .sldasm | Both | Dassault | 97-2018 | 97-2017 | Writing SOLIDWORKS format requires that the version of SOLIDWORKS you want to write to is actively licensed on the same machine. |
Solid Edge | .par, .asm, .psm | Both | Siemens | ST9 | Best exported as X_T. |
Geometric Modeling Kernels
Geometric Modeling Kernels are what Native CAD formats are built upon. Because these formats are strictly managed by the vendors, they are a better source of geometric information than STEP or IGES.
Format | Extensions | Precise or Tessellated | Vendor | TransMagic Read | TransMagic Write | Notes |
---|---|---|---|---|---|---|
ACIS | .sat, .asat, .sab, .asab | Both | Spatial Technologies | R1.5-R2017 (R27) | R1.5-R2017 (R27) | SAT is ascii, .sab is binary, and .asat and asab are specifically for assemblies. ACIS supports Non-Manifold geometry. |
Parasolid | .x_t | Precise | Siemens | Up to 29.0 | Up to 29.0 | Parasolid supports only manifold geometry. Read more about Manifold and Non-Manifold here. |
SMLib | .sms, .iwb, .iwp | Precise | Solid Modeling Solutions | All Versions | All Versions |
Neutral CAD Formats
Neutral CAD formats are the lowest-common denominator between CAD systems. If your customer does not have the software to read the native CAD file or the geometric modeling kernel format, STEP is your best bet.
Format | Extensions | Type | Managing Entity | TransMagic Read | TransMagic Write | Notes |
---|---|---|---|---|---|---|
IGES | .sat, .asat, .sab, .asab | Precise | ANSI / ASME | Up to 5.3 | Up to 5.3 | International Graphics Exchange Format; this format primarily supports surfaces and is generally the weakest of the translation formats. |
STEP | .stp, .step | Both | ISO | AP203/AP214, AP242 | AP203/AP214, AP242 | STEP is the most popular neutral CAD format in the world today, but STEP is not always the best go-to format for translation. |
Tessellated Formats
CAD formats are often converted to polygonal formats such as STL and OBJ for the purposes of 3D printing, animation or game development. Polygonal formats are tessellated, or faceted, and as such are an approximation, containing none of the engineering information found in Brep CAD models, such as weight or volume. Note that we have also included NGRAIN’s voxels in this list since, like polygons, voxels are an approximation of CAD geometry.
Format | Extensions | Precise or Tessellated | Vendor / Managing Entity | TransMagic Read | TransMagic Write | Notes |
---|---|---|---|---|---|---|
3DXML | .3dxml | Tesselated | Dassault | Up To R2016 (v4.3 internal version) | Up To R2016 (v4.3 internal version) | |
3D PDF | Tesselated | Tetra 4D | Up to 1.7 | Up to 1.7 | 3D PDF is an ideal format for sharing information with people who don’t have a CAD system or a CAD viewer; all you need to view a 3D PDF file is Adobe Acrobat Reader, which almost everyone has. | |
OBJ | .obj | Tesselated | Wavefront | All Versions | All Versions | Obj is a format commonly used for exchanging information between modeling and animation systems such as 3ds Max and Maya. |
Collada | .dae | Tesselated | ISO | All Versions | All Versions | |
NGRAIN | .3ko | Voxel | Ngrain | Up to version 4.1 | Voxels are actually a type of 3D pixel; they don’t really fit into any of the standard categories well, so we put them here. Voxels are good for allowing technicians and mechanics to visualize, maintain and service large, complex 3D assemblies such as automobiles and aircraft. | |
PLY | .ply | Tessellated | Stanford University | All Versions | All Versions | |
POD | .pod | Tessellated | All Versions | All Versions | ||
Stereo Lithography | .stl | Tessellated | 3D Systems | All Versions | All Versions | STL is the default format for 3D printing. STL files can be optimized using export settings, or via the Polygon Reduction tool. |
VRML | .wrl | Tesselated | WWW3 | 1.0 & 2.0 | ||
WebGL | .html | Tesselated | WWW3 | 1.0 & 2.0 | WebGL files are viewable and rotatable in any HTML5-supported browser with no plugins necessary, making them ideal for online parts libraries. |