dpasukhi [Mon, 11 Jan 2021 10:20:31 +0000 (13:20 +0300)]
0031970: Data Exchange, STEP reader - parser syntax error messages are inaccessible
- Upgraded files using new version of WinFlexBison
- Removed global variables within StepFile_Read.cxx
- Upgraded error message during bison analyzing ( added a expected expression information )
- Used 'Interface_ParamType' as argument type for the StepFile_ReadData::Argument
for a compatibility with the StepData/StepData_StepReaderData
- Added handling parse errors and transferring it to the StepData_StepReaderData
- Now parsing and referencing errors save in the check and non output by default
- Step_file's and Step_Data's output info prints according by trace level of printer
- Removed useless location.hxx
- Removed TraceLevel for the StepFile_Reader ( now it useless,
it is 0 by default and newer and nowhere change )
- Translate error message into English within StepData_StepReaderData
- Replace "Error" word in the output messages
kgv [Mon, 1 Feb 2021 17:46:00 +0000 (20:46 +0300)]
0032101: Visualization, TKOpenGl - use GL_UNPACK_ROW_LENGTH within OpenGL ES 3.0 / WebGL 2.0
Added OpenGl_Context::hasUnpackRowLength property for using GL_UNPACK_ROW_LENGTH in runtime.
OpenGl_Texture now uses GL_UNPACK_ROW_LENGTH on OpenGL ES 3.0 when necessary.
OpenGl_Texture::InitCubeMap() now allows uploading vertically-stacked cubemaps
without GL_UNPACK_ROW_LENGTH requirement.
kgv [Sun, 24 Jan 2021 15:31:54 +0000 (18:31 +0300)]
0032083: Visualization, TKOpenGl - PBR rendering is unavailable on Apple A12 Bionic (iPad)
Added "#define occLight_Index(theId) 0" workaround allowing to compile
a single light source PBR shading program on OpenGL ES 2.0,
as it disallows non-constant index expressions (even trivially deducable at compile-time).
PBR lookup table is now automatically resized to RGBA format
when RG texture format is unsupported (OpenGL ES 2.0).
OpenGl_ShaderManager now allows compiling PBR shaders
using WebGL 1.0 + GL_EXT_shader_texture_lod extension.
PBR IBL baking GLSL program has been redisigned to use
if/else to avoid non-constant index expressions.
Diffuse baking implements packing float values into a temporary RGBA8 texture
as a fallback solution on WebGL 1.0 implementations supporting float textures
but not as FBO render targets.
OpenGl_PBREnvironment now uses GL_FRAMEBUFFER instead of GL_DRAW_FRAMEBUFFER
for compatibility with OpenGL ES 2.0.
kgv [Fri, 29 Jan 2021 00:34:16 +0000 (03:34 +0300)]
0032093: Visualization, TKOpenGl - loading texture in BGR format fails in OpenGL ES
Graphic3d_TextureRoot::convertToCompatible() - fixed handling of
Image_Format_BGR and Image_Format_BGRA formats.
OpenGl_Texture - added error message for unsupported pixel format;
error messages have been extended by resource id.
OpenGl_Texture::InitCubeMap() now does not release cubemap
on mipmaps generation failure.
Image_PixMap::ImageFormatToString() - added method returning name of pixel format.
1) Add empty constructor for Poly_Triangulation(),
2) Add Poly_Triangulation::HasGeometry() method to check that triangulation has any geometry.
3) Add possibility to cache bounding box in Poly_Triangulation and use it later in case of empty triangulation.
4) Add Poly_Triangulation::MinMax() to extends input box with bounding box of triangulation.
5) Add Poly_Triangulation::UpdateCachedMinMax() to cache min - max range of this triangulation with bounding box of nodal data.
6) Add virtual Poly_Triangulation::computeBoundingBox() to calculate bounding box of nodal data.
7) Update BRepBndLib::Add/AddOptimal/AddOBB algorithms to check empty triangulation and use cached box in this case.
8) Update BRepGProp::roughBary/surfaceProperties/volumeProperties to skip empty triangulation.
9) Remove additional myBox from RWGltf_GltfLatePrimitiveArray and some hack to save this box as nodes of base Poly_Triangulation.
10) Cache min-max range from JT file during its parsing
kgv [Sat, 23 Jan 2021 18:35:46 +0000 (21:35 +0300)]
0032082: Visualization, TKOpenGl - improve formatting of error messages
Error messages in TKOpenGl package have been improved to format
GLenum values as string constants or hex values.
OpenGl_VertexBuffer::init() now logs a message with error details
instead of just returning Boolean flag.
Multiple changes in BRepOffset_MakeOffset algorithm:
- correct fusing vertices;
- correct building intersection edges;
- correct intersecting new edges in 2D;
- correct building wire on a new face;
- correct building history.
- moved creating of V3d_View::myTrihedron from constructor to first attempt of displaying or calling it;
- moved creating of V3d_Viewer::myRGrid and V3d_Viewer::myCGrid to to first attempt of displaying or calling them;
- renamed V3d_Viewer::IsActive() to V3d_Viewer::IsGridActive();
- redefined V3d_View::Trihedron() and V3d_Viewer::Grid() by adding new argument toCreate
for opportunity to check the existence of the objects without their recreating.
kgv [Mon, 18 Jan 2021 17:50:52 +0000 (20:50 +0300)]
0032065: Samples - use MODULARIZE within WebGL sample
Fixed multitouch input.
Module is now exported with global functions hidden via MODULARIZE
as global object OccViewerModule created by createOccViewerModule().
Global Module setup has been moved to occt-webgl-viewer.js.
Use EMSCRIPTEN_KEEPALIVE attribute istead of listing C functions via EXTRA_EXPORTED_RUNTIME_METHODS.
WasmOcctView now exports static methods as Module functions using EMSCRIPTEN_BINDINGS.
Standard_ASSERT_DBGBREAK_() is now defined using emscripten_debugger().
dpasukhi [Sun, 17 Jan 2021 13:27:11 +0000 (16:27 +0300)]
0032049: Data Exchange - STEP file import problems
- Added checking for null objects
- Added support to find layers according to visible attr
- Fixed problem with same names of layers:
Now, layers are grouped by names and visibility parameter
ifv [Tue, 12 Jan 2021 13:14:35 +0000 (16:14 +0300)]
0032058: Modeling Data - Extrema curve-surface gives wrong result for planar surface of revolunion and circle
Extrema_GenExtCS.cxx : added solution refinement, if solution seems to be "bad" according to special criteria.
Extrema_FuncExtCS.cxx : "cosmetic" modifications
BOPAlgo_PaveFiller_3.cxx : adding control of shape index to prevent exception in ShapeInfo
bugs/moddata_3/bug32058 : new test
Shadowmap sampler is now passed as a dedicated argument
to occDirectionalLightShadow() to workaround strict GLSL syntax validator.
Fixed texture coordinates clamping range.
kgv [Tue, 19 May 2020 07:47:25 +0000 (10:47 +0300)]
0031571: Visualization, TKOpenGl - provide depth peeling OIT option
Graphic3d_RenderTransparentMethod has been extended by Graphic3d_RTM_DEPTH_PEELING_OIT,
which is handled by OpenGl_LayerList::renderTransparent().
OpenGl_FrameBuffer::Init() now does not silently ignore unknown color attachment format and return failure.
OpenGl_FrameBuffer::InitWrapper() - added constructor wrapping existing color textures.
asuraven [Tue, 17 Nov 2020 17:37:01 +0000 (20:37 +0300)]
0031136: Modeling Data - BinXCAF persistence loses normals from triangulation-only Faces
Information about normals are stored in BinOCAF, XmlOCAF, BRep and BBRep (in case of triangulation-only Faces).
Versions of formats have been changed (11 for TDocStd, 4 for BRep Shape and 3 for Binary BRep Shape)
theWithNormals parameter added to BRepTools::Write()
IsWithNormals()/SetWithNormals() function added to BRepTools_ShapeSet
-normals/-noNormals option added to StoreTriangulation DRAW command
-normals/-noNormals option added to writebrep DRAW command
Tests for writing to brep/binary brep/BinXCaf/XmlXCaf added
Test for StoreTriangulation options -normals/-noNormals added
kgv [Wed, 13 Jan 2021 18:22:00 +0000 (21:22 +0300)]
0032055: Draw Harness, ViewerTest - add more vmanipulator position adjusting options
Draw::ParseOnOffIterator() - added auxiliary wrapper over Draw::ParseOnOff() for more compact syntax.
strncasecmp() definition for msvc compilers has been moved to Standard_CString for consistency with strcasecmp().
vmanipulator command has been refactored to use more straightforward parser.
vmanipulator now accepts "-adjustPosition {0|center|location|shapeLocation}" options
adjusting position to object's AABB center (existed before), object's local transformation or TopoDS_Shape location.
kgv [Mon, 11 Jan 2021 17:28:35 +0000 (20:28 +0300)]
0032050: Configuration - define fallback Android API version within auxiliary batch files
Script now defines a minimal Android API version when %anNdkApiLevel% is set to empty value
as 16 for 32-bit targets and 21 for 64-bit targets.
Added clearing of destination folders.
Added better handling of errors.
kgv [Mon, 4 Jan 2021 09:17:44 +0000 (12:17 +0300)]
0032039: Visualization, TKOpenGl - implement simple shadow mapping for a direct light source
Graphic3d_CLight::ToCastShadows() - added new property defining if light should cast shadows (ignored by Ray-Tracing).
OpenGl_ShaderManager::stdComputeLighting() now implements shadow mapping for directional lights.
OpenGl_ShaderManager::prepareGeomMainSrc() now handles copying of arrays.
OpenGl_Context::ShadowMapTexUnit() - added property defining an offset for shadow map texture units.
OpenGl_ShadowMap - added new class storing shadow map FBO with parameters.
OpenGl_View::prepareFrameBuffers() - added resizing of shadow map FBOs.
OpenGl_View::Redraw() - added section redrawing scene into shadow map FBOs via OpenGl_View::renderShadowMap() method.
vrenderparams - added new parameters -shadowMapResolution and -shadowMapBias.
kgv [Thu, 7 Jan 2021 21:48:29 +0000 (00:48 +0300)]
0032042: Visualization, TKOpenGl - pre-multiply headlight flag into light source position
OpenGl_ShaderManager::pushLightSourceState() now pre-multiplies headlight transformation.
Built-in shading GLSL programs have been updated to remove special handling if headlight flag;
also removed redundant pre-normalization of light source direction
(already normalized implicitly by Graphic3d_CLight interface).
Graphic3d_CLight::SetHeadlight() now raises exception in case of ambient light type.
OpenGl_ShaderManager::SetLastView() - removed unused property.
vro [Thu, 17 Dec 2020 10:17:46 +0000 (13:17 +0300)]
0029750: Samples - function arrows are not updated by moving a node in FuncDemo qt sample
The visual links between functions are recovered.
The demo is synchronized with a corresponding demo from Qt (qt486-vc10-32\examples\graphicsview\elasticnodes). It may be successfully compiled by any further versions of Qt including 5.10.1
Also, because Open CASCADE (and OCAF in particular) is improved for usage in multi-threading mode, usage of mutexes is added in this sample (for access to the sharing TNaming_UsedShapes attribute, for example).
asuraven [Tue, 15 Dec 2020 09:31:52 +0000 (12:31 +0300)]
0029723: Modeling Data - Get rid of second writing format (additional save of UV points)
Default BinTools_ShapeSet format version has been changed from 3 to 1.
BinMNaming_NamedShapeDriver (Bin OCAF) now writes shapes in 1st version of Binary format instead of 3rd.
XmlMNaming_NamedShapeDriver (Xml OCAF) now writes shapes in 1st version of ASCII format instead of 2nd.
writebrep now by default writes into 1st binary format version instead of 3rd.
dpasukhi [Fri, 27 Nov 2020 19:32:18 +0000 (22:32 +0300)]
0031756: Data Exchange - broken parsing of STEP entity in case of missing last parameter
- Parser is corrected to handle case of missing arguments properly (report error without corruption of the next entity)
- Added counter of entity arguments for appropriate error messages
- Plain C tools and data structures (recfile.*, stepfile.*) are converted to C++ class (StepFile_ReadData) to avoid use of static variables, so that reader can be safely used in a multi-threaded environment
mkrylova [Mon, 14 Dec 2020 12:18:43 +0000 (15:18 +0300)]
0031226: Foundation Classes - TCollection_AsciiString::IsRealValue() returns true if a string contains a non-real value
- Added comment to the method
- Added Boolean argument indicating the need for a strict
- Extended OCC11758 command in QABugs_19.cxx to verify IsRealValue()
- Updated existing places of IsRealValue() usage in ViewerTest to use new flag
Two virtual methods NewDocument() and InitDocument() are moved from TDocStd_Application to its parent class CDF_Application. In TDocStd_Application these methods remain redefined. These little changes allow creation of a new document only in one virtual method NewDocument(). The methods CreateDocument() in all retrieval drivers are deleted.
Modified files:
- CDF_Application.hxx and cxx: two virtual methods NewDocument() and InitDocument() are moved from TDocStd_Application. The input parameter TDocStd_Document is changed to parent class CDM_Document.
- TDocStd_Application.hxx and cxx: redefines new virtual methods NewDocument() and InitDocument() of the parent class CDF_Application.
- BinLDrivers_DocumentRetrievalDriver.hxx and cxx, StdLDrivers_DocumentRetrievalDriver.hxx and cxx, XmlLDrivers_DocumentRetrievalDriver.hxx and cxx, PCDM_Reader.hxx: a virtual method CreateDocument() is deleted.
- TObj_Application.cxx, XCAFApp_Application.hxx and cxx: down-casting to a descendant class TDocStd_Document is applied.
nds [Fri, 18 Dec 2020 10:09:08 +0000 (13:09 +0300)]
0031945: Foundation Classes - unique names of alerts of message report in DumpJson
- add OCCT_DUMP_FIELD_VALUE_NUMERICAL_INC and OCCT_DUMP_FIELD_VALUES_DUMPED_INC - to increment key Value;
- add OCCT_DUMP_STREAM_VALUE_DUMPED - to give stream as a parameter of the DumpJson;
- correct Message_Report, Message_CompositeAlerts to increment keys;
- correct Message_AttributeMeter to have in result start and stop values united in value block: [start stop]. It's better for parsing;
- correct result of Message::MetricToString output for updated in 29451 Message_MetricType enum;
- correct Standard_Dump::AddValuesSeparator to avoid adding ',' in additional case;
- correct Standard_Dump::FormatJson to add opening/closing brace for the whole result (for valid parsing);
- correct Standard_Dump::FormatJson to ignore '\n' in value.
nds [Wed, 16 Dec 2020 09:08:49 +0000 (12:08 +0300)]
0031350: Foundation Classes - Dump improvement for OCAF classes
- do not dump document in CDM_MetaData, just pointer text;
- move ID dump in to TDF_Attribute;
- extend TDF_Attribute with other important states(obtained by methods);
- extend TDocStd_Document with other important states;
- avoid dumping of shapes in TNaming_UsedShapes (it takes much time);
- extend XCAFDoc, XCAFDimTolObjects dump to json;
- correct XCAFDoc_ColorTool, XCAFDoc_MaterialTool, XCAFDoc_LayerTool to dump only connected to the object information;
- correct XCAFDoc_Material to dump name and density value only if it exists;
- add check on correct direction in gp_Ax3.
kgv [Mon, 3 Jun 2019 05:06:24 +0000 (08:06 +0300)]
0030762: Foundation Classes - include backtrace within OSD_SIGSEGV
Standard_Failure now holds an optional stack trace dump.
Added function Standard::StackTrace() dumping backtrace to the string.
SegvHandler within OSD_signal now appends backtrace to the message
if OSD::SignalStackTraceLength() is set to non-zero value
or environment variable "CSF_DEBUG_MODE" is set for debugging.
Added auxiliary macros Standard_NOINLINE disallowing function inlining.
Command "dsetsignal" has been extended by -strackTraceLength argument
for defining stack trace length within signals redirected to C++ exceptions.
Added "ddebugtraces" command for debugging purposes (adding stack traces to all exceptions).
asuraven [Tue, 3 Nov 2020 14:22:14 +0000 (17:22 +0300)]
0031946: Modeling Data - replace version numbers with enumerations in TopTools and BinTools
Added enumerations BinTools_FormatVersion & TopTools_FormatVersion for more clear version tracking in the code.
Added new BinTools::Write() & BRepTools::Write() overloaded functions with version & isWithTriangles parameters.
Added new "readbrep"/"writebrep" DRAW commands handling reading and writing of both Binary and ASCII .brep formats
and providing arguments to setup writing of triangulation data and of format version.
"binrestore" is made an alias to new command "readbrep".
"binsave" now is an alias to new "writebrep" saving into binary format by default ("writebrep" writes into ASCII format by default).
mkrylova [Fri, 6 Nov 2020 08:33:58 +0000 (11:33 +0300)]
0031703: Data Exchange, RWGltf_CafWriter - add option putting textures inside GLB file as alternative to external references
RWGltf_CafWriter::ToEmbedTexturesInGlb() - added option embedding textures
into GLB file enabled by default.
Fixed uninitialized class field RWGltf_CafWriter::myIsForcedUVExport.
Image_Texture::MimeType() - added method returning MIME type based on image file format.
Image_Texture::WriteImage() - added method writing image into stream.
ifv [Tue, 24 Nov 2020 11:17:03 +0000 (14:17 +0300)]
0029441: Modeling Algorithms - Incorrect intersection curves between faces
ApproxInt/ApproxInt_SvSurfaces.hxx : adding field myUseSolver in order to manage calculations of characteristics of intersection points.
ApproxInt/ApproxInt_MultiLine.gxx : implementation of using myUseSolver for treatment points of MultiLine.
ApproxInt/ApproxInt_ImpPrmSvSurfaces.gxx : implementation of using myUseSolver for case intersection of implicit and parametric surfaces.
mkrylova [Fri, 20 Nov 2020 12:10:23 +0000 (15:10 +0300)]
0031705: Visualization - move out construction of predefined markers from OpenGl_AspectsSprite to Graphic3d_MarkerImage
Built-in markers definition has been moved from OpenGl_AspectsSprite to Graphic3d_MarkerImage and generalized.
RGBA8 pixel format is now preferred over BGRA8.
Fallback OpenGL 1.1 rendering code now supports drawing of colored markers using glDrawPixels().
Added function Image_PixMap::FlipY() flipping image rows.
vro [Fri, 11 Dec 2020 15:13:25 +0000 (18:13 +0300)]
0029901: Support save to and restore from Stream interface in TObj package
Storage and retrieval of a document by means of a stream is distributed to TObj model.
Modified files:
-TObj_Model.hxx, cxx - the virtual methods Load() and SaveAs() obtained a stream as an argument instead of a file name.
-TObj_Application.hxx, cxx - same extension: the virtual methods LoadDocument() and SaveDocument() use a stream to open and save a document.
-TObjDRAW.cxx - draw-commands TObjSave and TObjLoad are extended for -stream parameter, which allows usage of a file input or output stream instead of a file name.
A new test:
- bugs caf bug29901 - it creates a simple TObj-model, saves it on disk using a file stream, loads it by means of a file stream and checks the content.
Modified test:
- bugs caf bug28425 - just improved to proper manipulate a test-file on disk.
Added OpenGl_Caps::buffersOpaqueAlpha option allowing to disable writes
into alpha component of color buffer and keep it opaque.
Added OpenGl_Context::SetColorMaskRGBA() method overriding each color component deliberately.
kgv [Thu, 3 Dec 2020 14:36:19 +0000 (17:36 +0300)]
0028966: Coding Rules - remove Adaptor2d_HCurve2d, Adaptor3d_HCurve and Adaptor3d_HSurface classes
Adaptor2d_Curve2d, Adaptor3d_Curve and Adaptor3d_Surface now inherit Standard_Transient.
Interfaces Adaptor2d_HCurve2d, Adaptor3d_HCurve, Adaptor3d_HSurface and their subclasses
are now aliases to Adaptor2d_Curve2d, Adaptor3d_Curve and Adaptor3d_Surface.
Removed numerous unsafe reinterpret casts.
Generic classes Adaptor3d_GenHCurve, Adaptor3d_GenHSurface, Adaptor2d_GenHCurve2d have been removed.
Several redundant .lxx files have been merged into .hxx.
age [Tue, 8 Dec 2020 10:32:07 +0000 (13:32 +0300)]
0031987: Visualization - Slow rectangular selection on models with big number of sensitives
SelectMgr_SensitiveEntitySet now stores a map of registered owners with a counter of registered entities.
SelectMgr_ViewerSelector::traverseObject() now reads the number of sensitive entities for specific owner
from SelectMgr_SensitiveEntitySet instead of re-computing it every time.
aavtamon [Wed, 2 Dec 2020 07:18:15 +0000 (10:18 +0300)]
0031402: Modeling Data - Geom_BSplineSurface::Segment() produces wrong result
In the method Segment() index1 needs to be checked as well as index2 in Geom_BSplineSurface and Geom2d_BSplineCurve
(Geom_BSplineCurve already has this check).
New test cases bug31402_1, bug31402_2 has been added.
The unnecessary code block in Geom2d_BSplineCurve has been deleted,
and checking index2 block has beed extended.
0030737: Visualization - implementing new selection schemes in context
AIS_SelectionScheme enumeration is defined to set which selection behaviour is used in Select of context
AIS_InteractiveContext is corrected to use single Select method instead of combination of Select/ShiftSelect methods with a selection scheme parameter.
Upgrade: Select() -> SelectDetected/Rectangle/Polygon(AIS_SelectionScheme_Replace), ShiftSelect -> SelectDetected/Rectangle/Polygon(AIS_SelectionScheme_XOR)
skl [Wed, 25 Nov 2020 10:55:12 +0000 (13:55 +0300)]
0030075: [REGRESSION] Shape Healing - Regression after implementation of fix for bug 28694.
Detect situation when U or V parameter has a big jump between two neighbour 2D points (diffX > 0.95*(Umax-Umin) or diffY > 0.95*(Vmax-Vmin)).
Additionaly surface must BSpline and distance between corresponding 3D points must be less than given precision.
For set of 2D points contains such jump method InsertAdditionalPointOrAdjust() is performed.
vro [Wed, 2 Dec 2020 06:38:28 +0000 (09:38 +0300)]
0029217: Application Framework - nonsense API method XmlLDrivers::SetStorageVersion()
1. Unification of usage of a storage version of an OCAF document by XML and binary file formats.
2. A new format version enumeration in TDocStd package: TDocStd_FormatVersion.
3. Removal of unnecessary methods for storage version like XmlLDrivers::StorageVersion() and BinLDrivers::StorageVersion().
4. Support of old documents (storage version <= 9) in binary file format (came from ESA).
New files:
- TDocStd_FormatVersion.hxx: a new storage format version enumeration for an OCAF document.
Modified files:
- CDM_Document.hxx and cxx: removal of storage format version property (moved to TDocStd_Document).
- TDocStd_Document.hxx and cxx: a storage format version property (moved from CDM_Document).
- BinLDrivers_DocumentSection.hxx and cxx: support of old document storage version in binary file format.
- BinDrivers_DocumentStorageDriver.hxx and cxx,
- BinLDrivers_DocumentStorageDriver.hxx and cxx,
- BinLDrivers_DocumentRetrievalDriver.cxx,
- XmlLDrivers_DocumentRetrievalDriver.cxx,
- XmlLDrivers_DocumentStorageDriver.cxx: usage of document storage version from TDocStd_Document in storage and retrieval drivers.
- DDocStd_ApplicationCommands.cxx: draw-command name StorageVersion is replaced by StorageFormatVersion (to be the same everywhere). A corresponding script is corrected too.
New test:
- bugs caf bug29217: a test case for old document storage version in binary file format. It checks several attributes saved by the version TDocStd_FormatVersion_VERSION_7 (old) and the latest version.
Modified test:
- caf presentation M1: the test used a file in the current folder, not in {imagedir} like all other tests.
- bugs caf bug28691
AIS_InteractiveContext::highlightGlobal() now passed through Style argument to highlightOwners().
Added OCC31965 command for testing AIS_InteractiveContext::Hilight() behavior.
In the result of translation one face lying on the spherical surface converted to the two separate faces due to method IsSurfaceUVPeriodic returned false for spherical surface.
Now method IsSurfaceUVPeriodic returns true for spherical surface in order to natural bounds can be added for spherical surface too.
Method ShapeFix_Face::FixOrientation was corrected to avoid reversing inner wire for case when spherical face has only one inner bound without outer bound.
Check that wire has bounding box equal to bounding box of surface was added in the method ShapeFix_Face::FixAddNaturalBound in order to avoid addition of the natural bounds ( test bugs xde bug22535_2 1 for face 2 lying on the torus)
In order to avoid regressions fix for translation "VERTEX_LOOP" entities was added. Natural bounds for "VERTEX_LOOP" lying on the Spherical and BSpline surface is added only if face does not have any other bounds.
In other case natural bounds were added during ShapeFix operation after translation in order take into account mutual position of the all bounds in the UV space of the face.
projects / occt.git / log