Open CASCADE, the 3D modelling kernel
3D modeling & numerical simulation


Open CASCADE Technology 6.5 is available for download!

March 5, 2011

OPEN CASCADE S.A.S. is pleased to announce a new public minor release of Open CASCADE Technology & Products (version 6.5). This release introduces about 310 modifications and bug fixes, over previous public minor release 6.3.

Main improvements in this version (a complete breakdown by all versions released since public version 6.3.):

6.3.1 (19 June 2009)
Open CASCADE Technology
  • A number of improvements has been made in Foundation Classes and Modeling libraries to facilitate the usage of OCCT in multithreaded applications.

  • A mechanism to collect statistics and debug memory allocation with OCCT optimized memory manager has been implemented.

  • A basic OCAF toolkit (TKLCAF) has become independent from OCCT modeling libraries.

  • Topological naming in OCAF has been considerably improved.

  • Geometry construction algorithms have been extended by advanced approximation methods.

  • Numerous improvements and bug fixes suggested by OCCT users have been implemented in Visualization libraries.

  • New supported compiler: Visual C++ 9.0 (Visual Studio 2008).

  • Products
  • Products have been extended by DRAW Test Harness plug-ins providing commands useful for testing and initial acquaintance with these libraries.

  • 6.4 (1 October 2010)
    Open CASCADE Technology
  • Accelerated triangulation algorithms in BRepMesh package, due to using Intel® TBB external library for the paralleling tools and the memory manager.

  • Use of freetype and ftgl external libraries for advanced 2D and 3D text visualization.

  • Improvement of algorithms for line-line, line-plane and plane-plane intersection.

  • New quaternion class for definition and manipulation of 3D rotation operators.

  • New interactive object class in AIS package for displaying triangulation encapsulated in Poly_Triangulation object.

  • List of supported Operating Systems and C++ compilers has been updated. Outdated Operating Systems are no longer supported. Please, see the System Requirements page for details.

  • Products
  • New BestFit product, which computes the transformation minimizing the normal distance between the given cloud of 3d points and the given shape.

  • New types of Boolean operations for surface meshes in Open CASCADE Mesh Framework (OMF) product.

  • New methods to read and write SAT data to streams in Open CASCADE ACIS SAT Interface product.

  • 6.4.1 (7 February 2011)
    Open CASCADE Technology
  • STEP interface has been improved to read and write non-manifold topology.

  • Trihedron with graduated axes is now available in OCC viewer

  • It is now possible to zoom relatively to the current cursor position instead of the view center.

  • A new package with Draw commands has been implemented to test Collision Detection product.

  • 6.4.2 (18 February 2011)
    Open CASCADE Technology
  • FreeImage(Plus) third-party library has been integrated to Open CASCADE Technology.

  • 6.5 (5 March 2011)
    Open CASCADE Technology
  • Integration of OCCT performance meter.

  • Management of presentations by the OCCT visualization engine (TKOpenGL library). has been improved to increase the performance.

  • Some memory leaks in OpenGL has been eliminated.

  • The definition of dependencies on external libraries has been revised to make them easily configurable.

  • Detailed information is available in Release Notes (PDF).

    Release Notes to all previous (customer) versions included into this public release are available for download on our website:

    Please, contact us for any additional information.


    Latest news
  • Open CASCADE CAD Assistant for iOS platform is available!
  • Open CASCADE Technology 6.9.0 is available for download!
  • JT Assistant for Android

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