Porting of user applications from an earlier OCCT version to version 6.5.2 requires taking into account the following major changes:
* Any code that has been generated by WOK from CDL generic classes *Tcollection_DataMap* and *Tcollection_IndexedDataMap* needs to be regenerated by WOK to take into account the change in the interface of these classes.
* The enumerations *CDF_StoreStatus* and *CDF_RetrievableStatus* have been replaced by the enumerations *PCDM_StoreStatus* and *PCDM_ReaderStatus*. Correspondingly, the methods *Open, Save* and *SaveAs* of the class *TDocStd_Application* have changed their return value. Any code, which uses these enumerations, needs to be updated.
-* *BRepLib_MakeFace* has been modified to accept tolerance value for resolution of degenerated edges. This tolerance parameter has no default value to ensure that the client code takes care of passing a meaningful value, not just *Precision::Confusion*, so some porting overheads are expected.
+* *BRepLib_MakeFace* has been modified to receive tolerance value for resolution of degenerated edges. This tolerance parameter has no default value to ensure that the client code takes care of passing a meaningful value, not just *Precision::Confusion*, so some porting overheads are expected.
* If the callback mechanism in call_togl_redraw function was used in the application code, it is necessary to revise it to take into account the new callback execution and provide a check of reason value of Aspect_GraphicCallbackStruct in callback methods to confirm that the callback code is executed at the right moment. Now the callbacks are executed before redrawing the underlayer, before redrawing the overlayer and at the end of redrawing. The information about the moment when the callback is invoked is provided with the reason value in form of an additional bit flag <i>(OCC_PRE_REDRAW, OCC_PRE_OVERLAY)</i>. The state of OpenGl changed in callback methods will not be restored automatically, which might lead to unwanted behavior in redrawing procedure.
* The print method used in the application code might need to be revised to take into account the ability to choose between print algorithms: tile and stretch. The stretch algorithm will be selected by default during porting.
* It is recommended to *BRepMesh_DiscretFactory* users, to check *BRepMesh_DiscretFactory::SetDefault()* return value to determine plugin availability / validity. *BRepMesh_DiscretFactory::Discret()* method now returns handle instead of pointer. The code should be updated in the following manner:
* Method *HashCode()* has been removed from class *Standard_Transient*. It is advisable to use global function <i>HashCode()</i> for Handle objects instead.
* Declaration of operators new/delete for classes has become consistent and is encapsulated in macros.
* Memory management has been changed to use standard heap <i>(MMGT_OPT=0)</i> and reentrant mode <i>(MMGT_REENTRANT=1)</i> by default.
-* Map classes in *NCollection* package now accept one more argument defining a hash tool.
+* Map classes in *NCollection* package now receive one more argument defining a hash tool.
@section upgrade_654 Upgrade to OCCT 6.5.4
#### Ambiguity of calls to overloaded functions
-This issue appears in the compilers that do not support default arguments in template functions (known cases are Visual C++ 10 and 11): the compiler reports an ambiguity error if a handle is used in the argument of a call to the function that has two or more overloaded versions, accepting handles to different types.
+This issue appears in the compilers that do not support default arguments in template functions (known cases are Visual C++ 10 and 11): the compiler reports an ambiguity error if a handle is used in the argument of a call to the function that has two or more overloaded versions, receiving handles to different types.
The problem is that operator <i> const handle<T2>& </i> is defined for any type *T2*, thus the compiler cannot make the right choice.
Example:
The main functionality provided by Local Context - selection of object subparts - can be now used within Neutral Point without opening any Local Context.
+The property *::SelectionMode()* has been removed from the class *AIS_InteractiveObject*.
+This property contradicts to selection logic, since it is allowed to activate several Selection modes at once.
+Therefore keeping one selection mode as object field makes no sense.
+Applications that used this method should implement selection mode caching at application level, if it is necessary for some reason.
+
@subsection upgrade_occt700_separate_caf_visualisation Separation of visualization part from TKCAF
Visualization CAF attributes have been moved into a new toolkit *TKVCAF*.
Redundant enumerations *V3d_TypeOfSurface* and *Graphic3d_TypeOfSurface*, class *OpenGl_SurfaceDetailState*, the corresponding methods from *Graphic3d_CView, OpenGl_ShaderManager, OpenGl_View, V3d_View* and *V3d_Viewer* have been deleted.
Draw command *VSetTextureMode* has been deleted.
-@section upgrade_occt710 Upgrade to OCCT 7.1.0
-
-@subsection upgrade_occt710_correction_of_Parab2d Correction in *gp_Parab2d, gce_MakeParab2d* and *GCE2d_MakeParabola* classes:
+@subsection upgrade_occt700_wfshape Shape presentation builders
-1. Constructors *GCE2d_MakeParabola(const gp_Ax22d& D, const gp_Pnt2d& F)*, *gce_MakeParab2d(const gp_Ax22d& D, const gp_Pnt2d& F)* and *gp_Parab2d(const gp_Ax22d& D, const gp_Pnt2d& F)* have been deleted.
+Presentation tools for building Wireframe presentation have been refactored to eliminate duplicated code and interfaces.
+Therefore, the following classes have been modified:
+* *StdPrs_WFDeflectionShape* and *Prs3d_WFShape* have been removed. *StdPrs_WFShape* should be used instead.
+* *StdPrs_ToolShadedShape* has been renamed to *StdPrs_ToolTriangulatedShape*.
-2. Objects created with some constructors of *gp_Parab2d* class may differ from the previous version. Please see the updated documentation for *gp_Parab2d* class (file *gp_Parab2d.hxx*).
-
-3. Result returned by gp_Parab2d::Directrix() method has another direction in compare with previous OCCT-version.
+@section upgrade_occt710 Upgrade to OCCT 7.1.0
@subsection upgrade_710_aspects Presentation attributes
-This section should be considered if application defines custom presentations (inherited from AIS_InteractiveObject).
-Previous versions of OCCT have three levels for defining presentation properties (e.g. colors, materials):
+This section should be considered if application defines custom presentations, i.e. inherited from *AIS_InteractiveObject*.
+The previous versions of OCCT have three levels for defining presentation properties (e.g. colors, materials, etc.):
-1. For entire structure (Graphic3d_Structure / Prs3d_Presentation).
-2. For specific group of primitives (Graphic3d_Group::SetGroupPrimitivesAspect()) overriding structure aspects.
-3. For specific primitive array within graphic group (Graphic3d_Group::SetPrimitivesAspect()).
+1. For the entire structure - *Graphic3d_Structure* / *Prs3d_Presentation*.
+2. For a specific group of primitives - *Graphic3d_Group::SetGroupPrimitivesAspect()* overriding structure aspects.
+3. For a specific primitive array within the graphic group - *Graphic3d_Group::SetPrimitivesAspect()*.
-The first one is de facto not used for a long time since OCCT presentations always define aspects at graphic group level (overriding any structure aspects).
-Within this OCCT release, this first level of aspects has been completely removed. In most cases application code should just remove missing methods; in rare cases where this functionality was intentionally used - application should explicitly define aspects to appropriate graphic groups.
+The structure level has de facto not been used for a long time since OCCT presentations always define aspects at the graphic group level (overriding any structure aspects).
+Within this OCCT release, structure level of aspects has been completely removed. In most cases the application code should just remove missing methods. In those rare cases, when this functionality was intentionally used, the application should explicitly define aspects to the appropriate graphic groups.
-Note that the 3rd level (defining several different aspects within the same graphic group) is also should be avoided in application code since it is deprecated functionality which can be removed in further releases.
-Graphic3d_Group::SetGroupPrimitivesAspect() should be the main method defining presentation attributes.
+Note that defining several different aspects within the same graphic group should also be avoided in the application code since it is a deprecated functionality which can be removed in further releases.
+*Graphic3d_Group::SetGroupPrimitivesAspect()* should be the main method defining presentation attributes.
-The implementation of Graphic3d_Group::SetGroupPrimitivesAspect() has been changed from copying aspect values to keeping passed object.
-Although it was not documented, previosly it was possible to modify single aspects instance (like Graphic3d_AspectFillArea3d) and set it to multiple groups.
-Now such code would produce unexpected result and therefore should be updated to create dedicated aspect instance.
+The implementation of *Graphic3d_Group::SetGroupPrimitivesAspect()* has been changed from copying aspect values to keeping the passed object.
+Although it was not documented, previously it was possible to modify a single aspect instance, like *Graphic3d_AspectFillArea3d* and set it to multiple groups.
+Now such code would produce an unexpected result and therefore should be updated to create the dedicated aspect instance.
@subsection upgrade_710_types Typedefs
- *Standard_Utf16Char* is now *char16_t* (previously *uint16_t* for compatibility with old compilers).
- *Standard_Utf32Char* is now *char32_t* (previously *uint32_t* for compatibility with old compilers).
-For most applications this change should be transparent, since the size of types have not been changed.
+For most applications this change should be transparent on the level of source code. Binary compatibility is not maintained, as *bool* has a different size in comparison with *unsigned int*.
@subsection upgrade_710_ffp Programmable Pipeline
Fixed-function pipeline has been already deprecated since OCCT 7.0.0.
Release 7.1.0 disables this functionality by default in favor of Programmable Pipeline (based on GLSL programs).
-This also means that method *V3d_View::Export()* based on gl2ps library and requiring disabled by default functionality has been deprecated as well.
-Applications should explicitly enable deprecated functionality by setting OpenGl_Caps::ffpEnable flag to TRUE within OpenGl_GraphicDriver::ChangeOptions() before creating the viewer to use V3d_View::Export(),
-but being aware that this functionality is likely to be removed in a next OCCT release.
-Thus the recommended way to generate vector image of a 3D model or scene is to use application-level solution independent from OpenGL.
+Method *V3d_View::Export()*, based on *gl2ps* library, requires fixed pipeline and will return error if used with default settings.
+Applications should explicitly enable fixed pipeline by setting *OpenGl_Caps::ffpEnable* flag to TRUE within *OpenGl_GraphicDriver::ChangeOptions()* before creating the viewer to use *V3d_View::Export()*.
+This method is declared as deprecated and will be removed in one of the the next OCCT releases.
+The recommended way to generate a vector image of a 3D model or scene is to use an application-level solution independent from OpenGL.
@subsection upgrade_710_trsfpers Transformation persistence
-The behavior of transformation persistence flags *Graphic3d_TMF_ZoomPers* and *Graphic3d_TMF_TriedronPers* have been changed to be consistent with textured fixed-size 2D text.
-Object with these flags is considered to be defined in pixel units, and presentation is no more scaled depending on view height.
-Applications that need to scale such objects depending on viewport size should update them manually.
+The behavior of transformation persistence flags *Graphic3d_TMF_ZoomPers* and *Graphic3d_TMF_TriedronPers* has been changed for consistency with a textured fixed-size 2D text.
+An object with these flags is considered as defined in pixel units, and the presentation is no more scaled depending on the view height.
+The applications that need to scale such objects depending on viewport size should update them manually.
-Flags *Graphic3d_TMF_PanPers* and *Graphic3d_TMF_FullPers* has been removed.
-*Graphic3d_TMF_TriedronPers* or *Graphic3d_TMF_2d* can be used instead depending on context.
+Flags *Graphic3d_TMF_PanPers* and *Graphic3d_TMF_FullPers* have been removed.
+*Graphic3d_TMF_TriedronPers* or *Graphic3d_TMF_2d* can be used instead depending on the context.
*Graphic3d_TransModeFlags* is not an integer bitmask anymore - enumeration values should be specified instead.
-Several transformation persistence methods in PrsMgr_PresentableObject have been marked deprecated.
-Transformation persistence should be defined using directly Graphic3d_TransformPers constructor and passed by a handle, not value.
-
-@subsection_upgrade_710_selprops Dynamic highlight and selection properties
+Several transformation persistence methods in *PrsMgr_PresentableObject* have been marked deprecated.
+Transformation persistence should be defined using *Graphic3d_TransformPers* constructor directly and passed by a handle, not value.
-Release 7.1.0 introduces *Graphic3d_HighlightStyle* - an entity that allows flexible customization of highlighting parameters (such as method, highlight color and transparency). Therefore, API of methods related to highlighting in the following core classes:
-- *AIS_InteractiveContext* (methods HilightWithColor(), Hilight());
-- *PrsMgr_PresentationManager* (method Color());
-- *SelectMgr_EntityOwner* (method HilightWithColor())
-was changed to process Graphic3d_HighlightStyle instead of Quantity_Color.
+@subsection upgrade_710_selprops Dynamic highlight and selection properties
-Method AIS_InteractiveContext::Hilight is now deprecated and highlights interactive object with selection style.
+Release 7.1.0 introduces *Graphic3d_HighlightStyle* - an entity that allows flexible customization of highlighting parameters (such as highlighting method, color, and transparency). Therefore, the signatures of the following methods related to highlighting:
+- *AIS_InteractiveContext::Hilight()*;
+- *AIS_InteractiveContext::HilightWithColor()*;
+- *PrsMgr_PresentationManager::Color()*;
+- *SelectMgr_EntityOwner::HilightWithColor()*;
+have been changed to receive *Graphic3d_HighlightStyle* instead of *Quantity_Color*.
-Group of methods AIS_InteractiveContext::IsHilighted changed behavior - now they only check object's or owner's highlight flags in global status. If highlight color is required on application level, overloaded methods AIS_InteractiveContext::HighlightStyle for owner and object must be used instead.
+Method *AIS_InteractiveContext::Hilight* is now deprecated and highlights the interactive object with selection style.
-The following methods were replaced in AIS_InteractiveContext API:
-- *HilightColor*, *SetHilightColor* were replaced by *HighlightStyle*, *SetHighlightStyle*;
-- *SelectionColor* setter and getter were replaced by *SelectionStyle*, *SetSelectionStyle*.
+A group of methods *AIS_InteractiveContext::IsHilighted* has changed its behavior - now they only check highlight flags of the object or the owner in the global status. If the highlight color is required on the application level, it is necessary to use overloaded methods *AIS_InteractiveContext::HighlightStyle* for the owner and the object.
-API of Prs3d_Drawer was extended to allow setting up styles for both dynamic selection and highlighting. Therefore, on application level changing highlight style for particular object must be implemented via SelectMgr_SelectableObject::HilightAttributes() and processed in entity owner.
+The following methods have been replaced in *AIS_InteractiveContext* class:
+- *HilightColor* and *SetHilightColor* by *HighlightStyle* and *SetHighlightStyle*;
+- *SelectionColor* setter and getter by *SelectionStyle* and *SetSelectionStyle*.
-@subsection upgrade_710_removed Removed features
-
-The following obsolete features have been removed:
-
-* Obsolete Antialiasing API *V3d_View::SetAntialiasingOn()*. This method was intended to activate deprecated OpenGL functionality (GL_POLYGON_SMOOTH, GL_LINE_SMOOTH, GL_POINT_SMOOTH).
- Instead of old API, application should request MSAA buffers for antialiasing by assigning *Graphic3d_RenderingParams::NbMsaaSamples* property of structure returned by *V3d_View::ChangeRenderingParams()*.
-* *Prs3d_Drawer::ShadingAspectGlobal()* flag has been removed as not used. Corresponding calls can be removed safely from the application code.
-* ZClipping planes and ZCueing (methods *V3d_View::SetZClippingType()*, *::SetZCueingOn()* and V3d_View::others).
- ZClipping planes can be replaced by general-purpose clipping planes (application should update plane definion manually).
-* 3D viewer printing API *V3d_View::Print()* has been removed. This functionality was available on Windows platforms only.
- Applications should use general image dump API *V3d_View::ToPixMap()* and manage printing using platform-specific API at application level.
- Text resolution can be managed by rendering parameter *Graphic3d_RenderingParams::Resolution*, returned by *V3d_View::ChangeRenderingParams()*.
-* Methods PrsMgr_PresentationManager::BoundBox, PrsMgr_PresentationManager::Hilight and SelectMgr_EntityOwner::Hilight were removed as not used.
- Corresponding method in custom implementations of SelectMgr_EntityOwner can be removed safely. PrsMgr_PresentationManager::Color with corresponding style must be used instead of removed presentation manager's methods.
-* Class *NCollection_QuickSort* has been removed.
- The code that used the tools provided by that class should be corrected manually.
- The recommended approach is to use sorting algorithms provided by STL.
-* Package *Dico* has been removed.
- The code that used the tools provided by that package should be corrected manually.
- The recommended approach is to use NCollection_DataMap and NCollection_IndexedDataMap classes.
+The API of *Prs3d_Drawer* has been extended to allow setting up styles for both dynamic selection and highlighting. Therefore, it is possible to change the highlight style of a particular object on the application level via *SelectMgr_SelectableObject::HilightAttributes()* and process it in the entity owner.
@subsection upgrade_occt710_correction_of_TObj_Model Correction in TObj_Model class
-Methods *TObj_Model::SaveAs* and *TObj_Model::Load* receive *TCollection_ExtendedString* filename arguments instead of char*. This shows that the filename may be not-ASCII explicitly. Also it makes OCAF API related to this functionality more conform.
+Methods *TObj_Model::SaveAs* and *TObj_Model::Load* now receive *TCollection_ExtendedString* filename arguments instead of char*. UTF-16 encoding can be used to pass file names containing Unicode symbols.
-@subsection upgrade_710_env Removed environment variables
+@subsection upgrade_710_env Redundant environment variables
-The following environment variables are now either become optional or have been removed:
+The following environment variables have become redundant:
-* *CSF_UnitsLexicon* and *CSF_UnitsDefinition* are no more used.
- Units definition (UnitsAPI/*Lexi_Expr.dat* and UnitsAPI/*Units.dat*) is now embedded into source code.
+* *CSF_UnitsLexicon* and *CSF_UnitsDefinition* are no more used. Units definition (*UnitsAPI/Lexi_Expr.dat* and *UnitsAPI/Units.dat*) is now embedded into source code.
* *CSF_XSMessage* and *CSF_XHMessage* are now optional.
English messages (XSMessage/*XSTEP.us* and SHMessage/*SHAPE.us*) are now embedded into source code
and automatically loaded when environment variables are not set.
-* *CSF_ShadersDirectory*.
+* *CSF_ShadersDirectory* is not required any more, though it still can be used to load custom shaders.
Mandatory GLSL resources are now embedded into source code.
+* *CSF_PluginDefaults* and other variables pointing to OCAF plugin resources (*CSF_StandardDefaults*, *CSF_XCAFDefaults*, *CSF_StandardLiteDefaults* and *CSF_XmlOcafResource*) are not necessary if method *TDocStd_Application::DefineFormat()* is used to enable persistence of OCAF documents.
+
+Other environment variables still can be used to customize behavior of relevant algorithms but are not necessary any more (all required resources are embedded).
-Internally, embedded resource files are represented by .pxx (private) header files,
-automatically (re)generated by *genproj* tool or by CMake with *BUILD_RESOURCES* option turned ON.
-Since embedded resources are stored in OCCT git repository, they should be regenerated after modification of original text file before pushing patch for integration.
-But since this option modifies source code, *BUILD_RESOURCES* option is disabled by default to avoid conflict with out-of-source build concept.
+@subsection upgrade_710_removed Removed features
+
+The following obsolete features have been removed:
+* Anti-aliasing API *V3d_View::SetAntialiasingOn()*. This method was intended to activate deprecated OpenGL functionality *GL_POLYGON_SMOOTH, GL_LINE_SMOOTH* and *GL_POINT_SMOOTH*.
+ Instead of the old API, the application should request MSAA buffers for anti-aliasing by assigning *Graphic3d_RenderingParams::NbMsaaSamples* property of the structure returned by *V3d_View::ChangeRenderingParams()*.
+* *Prs3d_Drawer::ShadingAspectGlobal()* flag has been removed as not used. The corresponding calls can be removed safely from the application code.
+* The methods managing ZClipping planes and ZCueing: *V3d_View::SetZClippingType()*, *V3d_View::SetZCueingOn()*, etc. have been removed. ZClipping planes can be replaced by general-purpose clipping planes (the application should update plane definition manually).
+* The 3D viewer printing API *V3d_View::Print()* has been removed. This functionality was available on Windows platforms only. The applications should use the general image dump API *V3d_View::ToPixMap()* and manage printing using a platform-specific API at the application level.
+ Text resolution can be managed by rendering parameter *Graphic3d_RenderingParams::Resolution*, returned by *V3d_View::ChangeRenderingParams()*.
+* Methods *PrsMgr_PresentationManager::BoundBox*, *PrsMgr_PresentationManager::Hilight* and *SelectMgr_EntityOwner::Hilight* have been removed as not used. The corresponding method in custom implementations of *SelectMgr_EntityOwner* can be removed safely. *PrsMgr_PresentationManager::Color* with the corresponding style must be used instead.
+* Class *NCollection_QuickSort* has been removed. The code that used the tools provided by that class should be corrected manually. The recommended approach is to use sorting algorithms provided by STL (std::sort). See also @ref upgrade_occt700_sorttools above.
+
+* Package *Dico*. The code that used the tools provided by that package should be corrected manually. The recommended approach is to use *NCollection_DataMap* and *NCollection_IndexedDataMap* classes.
+
+@subsection upgrade_710_changed_methods Other changes
+
+The following classes have been changed:
+
+* *BVH_Sorter* class has become abstract. The list of arguments of both *Perform* methods has been changed and the methods became pure virtual.
+* *Extrema_FuncExtPS* has been renamed to *Extrema_FuncPSNorm*.
+* The default constructor and the constructor taking a point and a surface have been removed from class *Extrema_GenLocateExtPS*. Now the only constructor takes the surface and optional tolerances in U and V directions. The new method *Perform* takes the point with the start solution and processes it. The class has become not assignable and not copy-constructable.
+* Constructors with arguments *(const gp_Ax22d& D, const gp_Pnt2d& F)* have been removed from *GCE2d_MakeParabola*, *gce_MakeParab2d* and *gp_Parab2d*. The objects created with some constructors of class *gp_Parab2d* may differ from the previous version (see the comments in *gp_Parab2d.hxx*). The result returned by *gp_Parab2d::Directrix()* method has an opposite direction in comparison with the previous OCCT versions.
+* *BRepTools_Modifier* class now has two modes of work. They are defined by the boolean parameter *MutableInput*, which is turned off by default. This means that the algorithm always makes a copy of a sub-shape (e.g. vertex) if its tolerance is to be increased in the output shape. The old mode corresponds to *MutableInput* turned on. This change may impact an application if it implements a class derived from *BRepTools_Modifier*.
+* The second parameter *theIsOuterWire* of method *ShapeAnalysis_Wire::CheckSmallArea* has been removed.
+* In class *GeomPlate_CurveConstraint*, two constructors taking boundary curves of different types have been replaced with one constructor taking the curve of an abstract type.
+* The last optional argument *RemoveInvalidFaces* has been removed from the constructor of class *BRepOffset_MakeOffset* and method *Initialize*.
+* The public method *BOPDS_DS::VerticesOnIn* has been renamed into *SubShapesOnIn* and the new output parameter *theCommonPB* has been added.
+
+@section upgrade_occt720 Upgrade to OCCT 7.2.0
+
+@subsection upgrade_720_removed Removed features
+
+The following obsolete features have been removed:
+* *AIS_InteractiveContext::PreSelectionColor()*, *::DefaultColor()*, *::WasCurrentTouched()*, *::ZDetection()*.
+ These properties were unused, and therefore application should remove occurrences of these methods.
+* *AIS_InteractiveObject::SelectionPriority()*.
+ These property was not implemented.
+
+@subsection upgrade_occt720_correction_of_Offset_API Corrections in BRepOffset API
+
+Class *BRepOffsetAPI_MakeOffsetShape*:
+* *BRepOffsetAPI_MakeOffsetShape::BRepOffsetAPI_MakeOffsetShape()* - constructor with parameters has been deleted.
+* *BRepOffsetAPI_MakeOffsetShape::PerformByJoin()* - method has been added. This method is old algorithm behaviour.
+
+The code below shows new calling procedure:
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~{.cpp}
+ BRepOffsetAPI_MakeOffsetShape OffsetMaker;
+ OffsetMaker.PerformByJoin(Shape, OffsetValue, Tolerance);
+ NewShape = OffsetMaker.Shape();
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Class *BRepOffsetAPI_MakeThickSolid*:
+* *BRepOffsetAPI_MakeThickSolid::BRepOffsetAPI_MakeThickSolid()* - constructor with parameters has been deleted.
+* *BRepOffsetAPI_MakeThickSolid::MakeThickSolidByJoin()* - method has been added. This method is old algorithm behaviour.
+
+The code below shows new calling procedure:
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~{.cpp}
+ BRepOffsetAPI_MakeThickSolid BodyMaker;
+ BodyMaker.MakeThickSolidByJoin(myBody, facesToRemove, -myThickness / 50, 1.e-3);
+ myBody = BodyMaker.Shape();
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+@subsection upgrade_720_highlight Highlight style
+
+Management of highlight attributes has been revised and might require modifications from application side:
+* New class *Graphic3d_PresentationAttributes* defining basic presentation attributes has been introduced.
+ It's definition includes properties previously defined by class Graphic3d_HighlightStyle (*Color*, *Transparency*),
+ and new properties (*Display mode*, *ZLayer*, optional *FillArea aspect*).
+* Class *Prs3d_Drawer* now inherits class *Graphic3d_PresentationAttributes*.
+ So that overall presentation attributes are now split into two parts - Basic attributes and Detailed attributes.
+* Class *Graphic3d_HighlightStyle* has been dropped.
+ It is now defined as a typedef to *Prs3d_Drawer*.
+ Therefore, highlight style now also includes not only Basic presentation attributes, but also Detailed attributes
+ which can be used by custom presentation builders.
+* Highlighting style defined by class *Graphic3d_PresentationAttributes* now provides more options:
+ - *Graphic3d_PresentationAttributes::BasicFillAreaAspect()* property providing complete Material definition.
+ This option, when defined, can be used instead of the pair Object Material + Highlight Color.
+ - *Graphic3d_PresentationAttributes::ZLayer()* property specifying the Layer where highlighted presentation should be shown.
+ This property can be set to Graphic3d_ZLayerId_UNKNOWN, which means that ZLayer of main presentation should be used instead.
+ - *Graphic3d_PresentationAttributes::DisplayMode()* property specifying Display Mode for highlight presentation.
+* Since Highlight and Selection styles within *AIS_InteractiveContext* are now defined by *Prs3d_Drawer* inheriting from *Graphic3d_PresentationAttributes*,
+ it is now possible to customize default highlight attributes like *Display Mode* and *ZLayer*, which previously could be defined only on Object level.
+* Properties *Prs3d_Drawer::HighlightStyle()* and *Prs3d_Drawer::SelectionStyle()* have been removed.
+ Instead, *AIS_InteractiveObject* now defines *::DynamicHilightAttributes()* for dynamic highlighting in addition to *::HilightAttributes()* used for highlighting in selected state.
+* The following protected fields have been removed from class *AIS_InteractiveObject*:
+ - *myOwnColor*, replaced by *myDrawer->Color()*
+ - *myTransparency*, replaced by *myDrawer->Transparency()*
+ - *myZLayer*, replaced by *myDrawer->ZLayer()*
+* The method *PrsMgr_PresentationManager::Unhighlight()* taking Display Mode as an argument has been marked deprecated.
+ Implementation now performs unhighlighting of all highlighted presentation mode.
+
+@subsection upgrade_720_Result_Of_BOP_On_Containers Result of Boolean operations on containers
+
+* The result of Boolean operations on arguments of collection types (WIRE/SHELL/COMPSOLID) is now filtered from duplicating containers.
\ No newline at end of file
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