Warning

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Jupiter Tesselation (JT)

It is a format that is used for the exchange of 3D data between different CAD systems. It is a lightweight format that is used for visualization and collaboration. The application of JT is predominant in the automotive and aerospace industry.

Extensions

JT, short for Jupiter Tesselation, is an Exchange Format managed by Siemens and standardised in ISO 14306:2017. It contains the following container suffix supported by instant3Dhub:

  • .jt

Structure

JT files support two primary structural formats:

  • Monolithic files: Single self-contained JT file

  • Linked Structure Files: Multiple interconnected JT files

These structures typically represent hierarchical assembly structures from the top-level assembly down to individual parts. instant3Dhub fully supports both structural formats via the structure tree.

Level of Detail (LOD):

  • JT format supports multiple geometric representations of varying fidelity

  • Only Tesselated representation in LODs in JT

  • Each LOD represents the same model with different geometric precision.

  • instant3Dhub automatically loads the highest available LOD.

External File References:

  • JT specifications allow external file referencing.

  • External file references are supported by instant3Dhub.

To learn more about how instant3Dhub handles structure information refer to the Structure section.

Geometry

JT supports facet information (triangles) as well as B-Rep information. Both are supported and loaded by instant3Dhub.

Tesselation

TBD

B-Rep

XT-BRep Elements (formerly JT BRep ELement - deprecated) are used as persistent identifiers for B-Rep elements in the JT-file to maintain an addressability of faces and edges over different versions of a file. These elements are supported by instant3Dhub and can be accessed e.g. via the TopologyAPI.

To learn more about how instant3Dhub handles geometric information refer to the Geometry section.

PMI & Model Views

JT supports Product Manufacturing Information (PMI) typically in form of tolerances. Two types of PMI are differentiated: Graphic and Semantic.

  • Graphic PMI are intended for human consumption only. PMI created in the source CAD system are transformed to tesselated lines, arcs, and faces, making it machine-unreadable.

  • Semantic PMI convey the data in a machine-readable way. It follows a pre-defined structure, consisting of a set of parameters (key-value pairs) and links to the underlying model elements.

In addition, a varying extent of styling information is given, including fonts, line styles, colors, widths.

The link between PMIs and the corresponding geometry is maintained.

To learn more about how instant3Dhub handles PMI & Modelview information refer to the PMI & Modelviews section.

Metadata

TBD

To learn more about how instant3Dhub handles metadata information refer to the Metadata section.