JT was originally developed by Engineering Animation, Inc. Over time, unused representations are unloaded to save memory. However, as the user zooms into a particular area, progressively finer representations are loaded and displayed. When the whole product is displayed on the computer screen the hosting application displays only a simple, coarse, model.
The JT file format is capable of storing an arbitrary number of faceted representations with varying levels of detail (LODs). those containing tens of thousands of components). JT was created to support the interactive display of very large assemblies (i.e. Leveraging JT for digital mock-up allows users to reduce or eliminate costly physical prototypes and enables decision-making to occur much earlier in the development process.įinally, JT is used as a CAD interoperability format for exchanging design data for Collaborative Product Development, where JT files are created by translating data from CAD systems such as NX (Unigraphics), Creo Elements/Pro, FORAN, I-DEAS, Solid Edge, Catia, Microstation or Autodesk Inventor. This "spatial validation" is enabled by precise measurements and cross-sectioning as well as sophisticated clearance/interference detection. JT is often used for Digital mock-up (DMU) work, which allows engineers to validate that a product can be assembled without interferences long before a physical prototype could be produced. As indicated above, JT can contain any combination of data such that the right amount of information can be shared without exposing the underlying proprietary design definition information. Finally, JT provides an inherent security feature such that intellectual property does not have to be shared with inappropriate parties. In addition, real-time, on-line collaboration is easier because the amount of information sent back-and-forth across the internet is reduced. Collaboration using JT allows companies to send 3D visualization data to suppliers and partners much more easily than sending the associated "heavy" CAD files. With the growing trend toward globalization, more companies are leveraging resources wherever they are available in the world. As JT is typically implemented as an integral part of a PLM solution, the resulting multi-CAD assembly is managed such that changes to the original CAD product definition files can be automatically synchronized with their associated JT files resulting in a multi-CAD assembly that is always up-to-date.īecause JT files are inherently "lightweight" (~1-10% of the size of a CAD file) they are ideal for internet collaboration. Because all major 3D CAD formats are supported, a JT assembly can contain a mixture of any combination which has led to the term "multi-CAD".
3D TESSELLATION SOFTWARE
The format and associated software is structured so that extremely large numbers of components can be quickly loaded, shaded and manipulated in real-time. JT files are used in product lifecycle management (PLM) software programs and their respective CAD systems, by engineers and other professionals that need to analyze the geometry of complex products. The JT format is designed to be streamable. Product and Manufacturing Information (PMI), Precise Part definitions (BRep), additional metadata, and a variety of representation configurations are supported. Visual attributes of 3D scene and model like lights, textures, and/or materials are supported. : 17 Facet information (triangles) is stored by using geometry compression techniques. The JT format contains a scene graph representation of an assembly, nested sub-assemblies of parts with CAD specific node and attributes data. It can contain any combination of approximate (faceted) data, boundary representation surfaces ( NURBS), Product and Manufacturing Information (PMI), and Metadata (textual attributes) either exported from the native CAD system or inserted by a product data management (PDM) system.
JT (Jupiter Tessellation) is an openly-published ISO-standardized 3D CAD data exchange format used for product visualization, collaboration, digital mockups, and other purposes.
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