HOOPS Exchange 2025.4.0

Note

Upcoming Change to Product Package Names

To improve clarity and consistency, HOOPS will adopt a unified naming scheme across all products. New package names will include product, version, platform, architecture, and compiler details. This change will take effect no earlier than the 2025.7.0 release in mid-September 2025.

Technology Updates

Format Updates

Format	Updated Version
CATIA V5	2025
3DXML	2025
Inventor	2026

See File Formats for the list of all supported formats.

Third-Party Library Updates

The following third-party library has been added:

Library	Version
Zstandard	1.5.7

For more information about package content, see Package Description.

New Features

• HOOPS Exchange on iOS now supports reading of Autodesk 3DS, FBX, OBJ and COLLADA files.
• HOOPS Exchange on iOS now supports writing of FBX and OBJ files.

Modification About Layers

• The A3DAsmLayer structure is now deprecated and will be removed in future versions. It is replaced by layerA3DAsmLayerEntityData.
• The A3DAsmProductOccurrenceGetLayerList() function is deprecated. Now a layer list can be obtained from any instance of A3DAsmProductOccurrenceData containing layers.

See Layers for more information.

Experimental USD Writer

The Universal Scene Description (USD) file format, maintained by the Alliance for OpenUSD, is used by many industries and CAD applications.

As of HOOPS Exchange 2025.4.0, we provide a USD writer as a new experimental feature. This new export format comes with some limitations, particularly regarding supported compilers on GNU/Linux. This format is also subject to changes in the scope and signature of the API.

The USD Writer page provides all of the necessary information to start exporting to USD.

API Changes

• Added m_ppLayers and ~A3DAsmProductOccurrenceData::m_uiLayersSize members for A3DAsmProductOccurrenceData.
• Added A3DAsmLayerEntityData structure.
• Added A3DAsmLayerEntityGet() function.
• Added A3DAsmModelFileExportToUSDFile() function (experimental only).
• Added A3DRWParamsExportUSDData structure (experimental only).

Deprecations

• A3DAsmProductOccurrenceGetLayerList() function is deprecated.
• A3DAsmLayer structure is deprecated.

Package Changes

Our example codes included with HOOPS Exchange packages now support building with CMake. For more information, please see Sample Code.

Fixed Bugs

Issue	Description
SDHE-22474	Fixed unexpected behavior when importing an invalid JT file.
SDHE-22472	Fixed unexpected behavior when importing an invalid JT file.
SDHE-22463	Fixed unexpected behavior when importing an invalid CATIA V5 file.
SDHE-22422	Fixed unexpected behavior when importing an invalid JT file.
SDHE-22388	Restored ability to load SolidWorks assembly.
SDHE-22363	Fixed vulnerability by not writing out of bounds of an array when data is inconsistent.
SDHE-22337	Fixed unexpected behavior when sewing a PRC file.
SDHE-22180	Fixed missing imported faces by also keeping shared surfaces owned by Quilts.
SDHE-21655	Fixed the management of temperature units for material properties.
SDHE-20699	Set colors on some boolean operation results where they were missing.