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).