OpenCASCADE 7.4.0 Released

Open Cascade is pleased to announce a new public release of Open CASCADE Technology (version 7.4.0).

Open CASCADE Technology version 7.4.0 is a minor release which includes more than 500 improvements and corrections over the previous minor release 7.3.0.

New in this version:

Modeling

•  Improved robustness, performance and accuracy of BRepMesh algorithm
•  Options to control linear and angular deflection for interior part of the faces in BRepMesh
•  Improved robustness and stability of Boolean Operations and Extrema
•  Enabled Boolean Operations on open solids
•  Option to suppress history generation to speed up Boolean Operations
•  Option to simplify the result of Boolean Operation
•  Possibility to calculate surface and volume properties of shapes with triangulation-only geometry
•  A new interface for fetching finite part of infinite box in BRepBndLib
•  New “constant throat” modes of chamfer creation
•  Removal of API for old Boolean Operations

Visualization

•  Improved support of embedded Linux platforms
•  Selection performance improvement
•  Support of clipping planes combinations (clip by box, ¾, etc.)
•  New class AIS_ViewController converting user input (mouse, touchscreen) to camera manipulations
•  Improved font management
•  Improved tools for visualization performance analysis
•  Option to display the outline of shaded objects
•  Option to exclude seam edges from Wireframe display
•  Option to display shrunk mesh presentation
•  Possibility to show shapes with dynamic textures (video)
•  Support of encoded bitmap image reading from memory buffer
•  Removal of the deprecated Local Context functionality from AIS
•  Removed dependency from gl2ps (relying on deprecated OpenGL functionality)

Data Exchange

•  New tools to import mesh data from glTF 2.0 and OBJ formats
•  Support of some non-ASCII encodings in STEP import
•  Support of XDE data (assembly structure, colors, names) in export to VRML

Draw Test Harness

•  Improved 3D Viewer camera manipulations
•  Fixed issues with starting Draw Harness from batch scripts
•  Improved support of running Draw Harness in environment without CASROOT

Other

•  Improved performance of built-in parallelization routines (OSD_Parallel)
•  Tools for convenient and efficient traverse of BVH structures
•  Optimization of TPrsStd_AISPresentation attribute
•  Sample of 3D Viewer integration in glfw application

Detailed information about this release is available in Release Notes (PDF).