V7_4_0

Version 7.4.0 - October 1, 2019. Highlights (see also Release Notes):

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 reading encoded bitmap image 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

V7_3_0

Version 7.3.0 - May 29, 2018. Highlights (see also Release Notes):

General

• Support of Unicode file names and software signals handling for MinGW-w64 builds
• Recommendations on fulfillment of LGPL terms in Overview documentation
• Restored compatibility with Visual Studio 2008
• Support of GBK and Big5 code pages

Application Framework

• Ability to redefine the stored/retrieved document version and the application name

Modeling

• Face Removal algorithm
• Optimized surface intersection, shape offset and Boolean operation algorithms
• Oriented Bounding Boxes (OBB)
• More complete history in the family of Boolean Operations algorithms
• Improved stability of BRepProj_Projection algorithm

Visualization

• Corrected translation of single-stroke fonts into BRep
• Improved compatibility with EGL on Linux, Intel HD GPUs, Mesa OpenGL, remote desktop
• Possibility to arrange more than 8 light sources and assign them to layers
• Possibility to assign Shading Model per primitive array
• Support of custom GLSL programs with Geometry and Tessellation shaders
• Distance and size culling options for rendering large scenes
• Depth pre-pass option for rendering heavy custom GLSL programs
• Verbose frame statistics for profiling 3D Viewer performance

Data Exchange

• Documentation for PMI in XCAF

V7_2_0

Version 7.2.0 - August 31, 2017. Highlights (see also Release Notes):

Configuration

• Support of Visual Studio 2017
• CMake option to accelerate build by use of precompiled headers

Application Framework

• Dedicated attribute for storage of triangulations
• Possibility to save OCAF document in XML format compatible with OCCT 6.7+
• Restored possibility to write shapes in legacy persistence format (CSFDB, ShapeSchema)
• Support of files greater than 2 GiB in binary persistence

Modeling

• Optimization of surface intersection and other algorithms
• Specialized offset algorithm for smooth shells
• Proper setting of regularity on edges connecting smooth surfaces (e.g. seam edges)
• New algorithm BOPAlgo_Splitter allowing to split shapes by intersection with others
• New option “Glue” in the family of Boolean algorithms
• New Error/Warning reporting system in Boolean Operations component

Visualization

• Order-independent transparency within rasterization rendering
• Extended features of color scale presentation
• Possibility to customize display of hatching and selection highlight
• Multiple improvements in Path Tracing engine
• Option for efficient display on high-density screens with low-end graphic cards

Data Exchange

• Support of annotations, saved views and clipping planes in XDE and STEP
• Optimized update of assemblies in XDE
• Support of PMI data without semantics in STEP import and export
• Support of transparency as part of color specification in XDE
• Refactored and optimized STL read / write module

Test system

• Possibility to add custom counters
• Interface to connect DRAW interpreter to user applications

Samples

• New sample for usage of 3D Viewer on iOS

V7_1_0

Version 7.1.0 - November 25, 2016. Highlights (see also Release Notes):

General

• Support of Windows Store applications
• Definition of Standard_Boolean as bool instead of unsigned int
• Execution without need of setting environment variables

Application framework

• OCAF persistence without dynamic plugins
• Support of several attributes of one type at the same label

Modeling algorithms

• Improved 3D Offset operation in mode Complete with Joint type Intersection
• Calculation of the optimal axis-aligned bounding box for a shape
• Improved reliability of HLR algorithm
• Prevention of modification of original shapes in Modeling algorithms

Visualization

• Use of programmable pipeline (GLSL) by default on all platforms
• Improved rendering performance of Wireframe presentation
• Improved Shaded highlighting in AIS_Shape
• Improved clipping planes - capping preserving object material and better performance
• Support of perspective projection and selection for transformation persistent objects
• New presentation AIS_Manipulator for interactive object transformation
• New property in AIS_Dimension to set custom text value
• Type of angle and type of arrows properties in AIS_AngleDimension
• New optimized Path Tracing algorithm (adaptive screen space sampling)

Data exchange

• Improved support of STEP AP242, including PMI data, dimensions, and annotations

V7_0_0

Version 7.0.0 - April 5, 2016.

Major release to include complete code refactoring, elimination of CDL and WOK. Highlights (see also Release Notes):

Configuration

• Conversion of CDL classes to plain C++
• Use of CMake as main build system, replacing WOK

Foundation Classes

• New implementation of shared pointer (Handle)
• Redesign of OCCT type system

Modeling algorithms

• Refactoring of B-Spline evaluation
• Ability to perform Boolean expressions on an arbitrary number of arguments
• Intersection of surfaces produces more accurate b-spline curves
• More predictable offset of 3D shapes with a large offset value in “Intersection” mode

Visualization

• Activation of selection modes without opening the local context
• OpenGL graphic rendering methods exposed to the client code
• Support of zoom persistent selection
• Configurable font orientation
• Direct3D integration toolkit
• Support of antialiasing using multisampling technique (MSAA)

Application framework

• Interface for reading / saving documents from / to arbitrary C++ stream
• Main OCAF toolkits are made independent on Visualization toolkits

Data exchange

• Support of reading and writing semantic PMI entities for STEP AP242 format
• Optimization of shape triangulation export to STL and VRML

Products

• ACIS SAT Import-Export: new geometrical entities and color attributes supported
• DXF Import-Export: improved translation of UNICODE text
• BestFit: improved calculations with non-null offset on two-sided models
• Mesh Framework Kernel: accelerated interfaces to STL and OBJ formats
• Advanced Samples: new WPF Import/Export sample added to the Advanced C# Wrapper tool

V6_9_0

Version 6.9.0 - May 12, 2015. Highlights (news):

Modeling algorithms

• Fuzzy Boolean operations - possibility to specify global tolerance for a Boolean operation;
• Support of multiple arguments for a single Boolean operation;
• Improved performance and thread safety;
• Shape proximity detector;
• Revised usage of Closed flag in shapes;
• Precise evaluation of edge tolerance;
• Additional options to tune BRepMesh algorithm;
• More robust algorithms of surface-surface intersection and curve on surface projection;
• Improved support of user feedback messages in Shape Processing;
• New tool to eliminate small solids in ShapeFix;

Visualization

• Redesign of selection mechanism for better performance;
• OpenGL ES 2.0 compatibility improvements;
• Support of OpenGL viewer on iOS and ray tracing on OS X;
• Robust implementation of immediate mode using FBO;
• Option to disable automatic re-triangulation of shapes on display;

Data Exchange

• Reconstruction of p-curves optimized to accelerate import from STEP;
• Colors of edges and faces are written to IGES 5.3;
• Orientation of faces is preserved on export to IGES 5.1;
• Export to STL and VRML 2.0 corrected;

Other

• Support of parallelism without TBB library;
• 64-bit mode becomes default on Windows;
• Improved stability of performance measurements in tests;

Products

• Express Mesh: improved quality of mesh near face boundary;
• C# and Java wrappers: Support of SWIG 3.x;
• DXF Import: Reading of the recent DXF versions with ACIS data encoded in binary form;
• ACIS SAT Import: Reading of SAB (Standard ACIS Binary) files

V6_8_0

Version 6.8.0 - November 10, 2014. Highlights (news):

Foundation Classes

• Using NULL as invalid pointer in Handle classes, instead of custom constant (0xfefd0000...);
• STL-compatible iterators for classes in NCollection package;
• Code clean-up: removing usage of config.h, support of pre-standard STL streams, unused CDL template (“generic”) classes and instantiations, etc.;

Modelling

• Data structures for Bounded Volume Hierarchy (BVH) algorithms;
• Two new algorithms of global optimization in math, used for Extrema;
• Parallelization of Boolean Operations algorithm;
• Interface to break execution of Boolean Operations algorithm;
• Possibility to protect shape against modification of geometry;
• Refactoring and optimization of BRepMesh algorithm;
• New option in 2d offset algorithm allowing to keep sharp corners and build one-side offset on open wire;

Visualization

• New component, VIS, providing interactive services (similar to AIS) for OCCT shapes in VTK viewer;
• New approach for manipulations with views using camera paradigm;
• Support of stereoscopic display (requires graphic card supporting OpenGL Quad Buffer);
• Improved support of perspective views;
• Ray tracing now uses shaders (GLSL) instead of OpenCL;
• Possibility to combine objects drawn by OpenGL and ray tracing in one view;
• Frustum culling for fast display of large number of objects with high zoom;
• Initial support for OpenGL ES 2.0 for mobile platforms;
• New classes for display of colored shapes and point clouds in AIS;
• Revised and completed implementation of connected interactive objects;
• Improved handling of temporary objects in the viewer (immediate mode);

Data Exchange

• Support of COMPSOLIDs in STEP export;
• Support of UNICODE (UTF-8) filenames;
• Support of names and attributes assigned to points (vertices) in XCAF;

DRAW

• FPE signal handlers are disabled by default;
• New sample scripts demonstrating modeling and visualization capabilities in DRAW;
• Improved usability of top level menu (help browser, samples, User Guide);

Documentation

• New User Guide describing Boolean Operations algorithms;
• Improvement of extraction of class documentation for Reference Manual;

Samples

• New sample for using drawing OCCT 3D viewer into Direct3D surface in WPF applications;

Build system

• Support of building on Android (except for DRAW);

Products

• New (experimental) mode in Express Mesh, allowing generation of all-quad meshes;
• Universal interface to export mesh produced by Express Mesh;
• Improved triangulation near face boundaries in Express Mesh (Delaunay meshing);
• Update of training materials and samples;
• Translation of HATCH entities from DXF;
• Boolean operations on meshes in OMF provide history on elements and handle complex cases;
• Visualization of meshes in OMF takes into account direction of normal vectors to surface;
• New wrapper for OCCT classes for Java language;

V6_7_0

Version 6.7.0 - December 18, 2013 (see also Release Notes).

Minor (feature) release. Highlights:

• License has been changed to LGPL-2.1-only with additional exception;
• Dynamic clipping of shaded objects by arbitrary planes, with cross-section visualized by capping algorithm;
• Optimized and enhanced presentation of point markers using point sprites and VBO;
• Enhanced presentation of dimensions;
• Support of GLSL programs;
• Ray tracing mode of display of shaded objects in OCCT viewer providing high-quality image (including sharp shadows, correct transparency, reflections);
• Functionality to create BRep shape representing a text string (with specified font);
• Multiple corrections in Voxel package;
• New (more robust) 2D fillet algorithm;
• New documentation system: Doxygen is used to generate Overview and User Guides, their sources are included in OCCT sources;
• Considerably improved code stability, and clean-up of compiler warnings;
• Algorithm of result assembling in Boolean Operations is made parallel;
• Optimization: use of SSE2 instructions, refactored code of b-spline evaluation, revised XML persistence of binary data;
• Refactored CSharp sample, now including WPF front-end;
• Official support of Intel compiler, Visual Studio 2013, and Mac OS X 10.9 Mavericks.

V6_6_0

Version 6.6.0 - April 22, 2013.

Feature release incorporating new functionality. Highlights (news):

• Official support of Mac OS X, Windows 8 and Visual Studio 2012
• On Mac OS X, visualization with native Cocoa API and XCode 4 project files
• Refactored Boolean operations algorithm. Possibility to enable automatic check of input parameters and results and generation of data for bug report
• Redesign of texture management
• Accelerated text visualization; use of FTGL library is dropped
• Removal of obsolete 2D viewer and plotter support libraries. 3D viewer libraries become the unified way to render both 2D and 3D graphics
• TKOpenGl is now linked at build time, not at run time
• Import / export made independent on current global locale
• Universal CMake build scripts
• New automated testing system

V6_5_0

Version 6.5.0 - March 6, 2011. Highlights (see also Release Notes]):

• Implementation of FreeImage(plus) library
• Reading and writing non-manifold topology via STEP interface
• Draw commands for testing Collision Detection product
• New definition of dependencies on external libraries
• Trihedron with graduated axes in OCC viewer
• Removal of Wrappers, Java sample and Java (Jcas) redistributables