1. Algorithm of orthogonalize of the transformation matrix (in gp_Trsf(2d) classes) has been documented.
2. Algorithm of computation of intersection line in case of two intersected cylinders (implemented in the fix for issue #24915) has been documented. Additionally, I would like to tell about some advantages of new algorithm in compare with old one.
2.1. Both algorithm generates intersection points for Walking-line (WL), which will be approximated to B-spline curve(s) in the future. At that, new algo (in compare with old one) uses another method for step computation. It based on attempts to provide equal steps (if it is possible) along V-direction (instead of U-direction used in old algorithm). It allows obtaining set of points, which are more uniform distributed in compare with old algo (this problem is the main reason why case #24915 was failed). Of course, we will get non-uniform distribution along U-direction. However, it can be compensated by small range (its length is less or equal 2*PI) of U-parameter change, whereas range of V-parameter can be very big.
2.2. More simple estimation of curvature "jump". New algo aims at provide equidistant distribution of points along V-direction. If it requires "jump" of U-parameter then we have "jump" of curvature in this point. This check is implemented in function AddPointIntoWL(...) (see place where SeekAdditionalPoints(...) is called).
However, in OCCT 7.1.0, curvature jumping is analyzed (it was not earlier, when the bug #24915 was fixed) - see fix for issue #27431.
2.3. New algorithm allows obtaining 7D-intersection point immediately. At that, old algorithm computed only 2D-intersection point (on some one surface). After that, it computed 3D-intersection point and, finally, projected(!) 3D-point to the second surface in order to obtain second 2D-intersection point. This second projection results in some problems. One problem is described in the issue #27968 (see message ~0058807). Second problem is the process of cases with singularity (significant improvement in this direction has been made in the fix#27431). Third problem is difficulties in projection itself (e.g. if we project point to a sphere when V-coordinate of the projection is near to PI/2 - projection point is found but not precise; the reason is not singularity but small radius of V-isoline).
Method used in new algorithm allows avoiding these problems. However, at present, it is implemented for case of two cylinders intersection (where most of these problems are not actual).
2.4. Algorithm of search of intersection point on surface boundary(ies) has been changed, too. Old algorithm sought point on boundary irrespective of intersection line. It resulted in problems described in the issue #27252 and related. New algorithm looks for intersection point of intersection line with surface boundary. It requires rectangular domain. However, it is not problem for current OCCT-version.
The method to find common Vertices and Edges between faces
BRepOffset_Tool::HasCommonShapes(const TopoDS_Face&,
const TopoDS_Face&,
TopTools_ListOfShape&,
TopTools_ListOfShape&)
has been re-implemented using maps and renamed to BRepOffset_Tool::FindCommonShapes.
The new method
BRepOffset_Tool::FindCommonShapes(const TopoDS_Shape&,
const TopoDS_Shape&,
const TopAbs_ShapeEnum,
TopTools_ListOfShape&)
has been implemented to look for the common shapes of given type.
1. The possibility to prevent addition of internal parts has been added into the following algorithms:
- BOPAlgo_BuilderFace;
- BOPAlgo_BuilderSolid;
- BOPAlgo_MakerVolume.
Setting the option to avoid internal parts for MakerVolume algorithm guarantees that the result solids
will be manifold and not contain any internal parts. But it does not prevent from occurrence
of the internal edges or vertices in the faces.
2. The Set/Get methods of the BOPAlgo_BuilderArea class have been made inline.
3. Draw command mkvolume has been updated to take into account the new option.
4. BRepOffset_MakeOffset::BuildShellsCompleteInter() has been modified to use the new option of BOPAlgo_MakerVolume
to speed up the construction of the final result solid.
5. Documentation has been updated with new section dedicated to BOPAlgo_MakerVolume algorithm.
6. Test case for the issue.
Added information about removed classes StdPrs_WFDeflectionShape,
Prs3d_WFShape, StdPrs_ToolShadedShape and removed property
AIS_InteractiveObject::SelectionMode().
1. Unification of the usage of the BRepAdaptor_Surface in Boolean Operations algorithm.
For each face when it is necessary the Adaptor is initialized only once and stored in Context.
For that purpose the new IntTools_Context::SurfaceAdaptor(const TopoDS_Face&) method has been implemented.
To provide possibility to take the Adaptor from the context, the context has been added as
a parameter in following methods:
BOPTools_AlgoTools::MakePCurve()
BOPTools_AlgoTools::Sence()
BOPTools_AlgoTools2D::BuildPCurveForEdgeOnFace()
BOPTools_AlgoTools2D::PointOnSurface
BOPTools_AlgoTools2D::CurveOnSurface
BOPTools_AlgoTools2D::AdjustPCurveOnFace
BOPTools_AlgoTools2D::Make2D
BOPTools_AlgoTools2D::MakePCurveOnFace
BOPTools_AlgoTools3D::GetNormalToFaceOnEdge
It is also possible now to pass the context into BOPAlgo_WireSplitter algorithm.
Also, the new IntTools_Context::UVBounds(const TopoDS_Face&) method
has been implemented to get the UV bounds of a face.
2. Additional improvement is a calculation of reduced intersection range only for the intersection
type VERTEX during computation of Edge/Face interference.
3. The methods IntTools_EdgeFace::Prepare() and IntTools_EdgeFace::FindProjectableRoot()
and the fields IntTools_EdgeFace::myProjectableRanges and IntTools_EdgeFace::myFClass2d
have been removed as obsolete.
4. Test cases for the issue.
The Gluing operation is an additional option for the algorithms in the Boolean Component
such as General Fuse, Boolean operations, Section operation, Maker Volume and Cells Builder algorithms.
The Gluing options have been designed to speed up the computation of the interference among arguments of the operations on special cases,
in which the arguments may be overlapping but do not have real intersections between their sub-shapes.
This option cannot be used on the shapes having real intersections, like intersection vertex between edges,
or intersection vertex between edge and a face or intersection line between faces.
The Gluing option is an enumeration implemented in BOPAlgo_GlueEnum.hxx. There are following items in the enum:
* BOPAlgo_GlueOff - default value for the algorithms, Gluing is switched off;
* BOPAlgo_GlueShift - Glue option for shapes with partial coincidence;
* BOPAlgo_GlueFull - Glue option for shapes with full coincidence.
For setting the Gluing options for the algorithm it is just necessary to call the SetGlue(BOPAlgo_GlueEnum) method with appropriate Glue value.
For using this option in DRAW the command bglue has been implemented:
* 0 - default value, Gluing is off;
* 1 - for partial coincidence;
* 2 - for full coincidence
Elimination of the warnings.
In the case of infinite point due to not enough machine precision the distance from the point to each edge of the face is computed the same, and the algorithm cannot correctly select the nearest edge. To solve this problem checking of point was added, if the point is located too far from the bounding box of the face, then it will be replaced with another point located on the line between the point and the center of the bounding box.
The new point has the same state as initial one but its state can be resolved without ambiguity.
Corrections in CheckPoint method
Small correction of test case for issue CR27434
New topology-preserving offset algorithm has been added. It allows to construct offset shape of build solid.
test cases have been added.
Documentation has been updated to be up to date.
Minor corrections.
Grid is renamed for simplification purposes.
Old constructors are restored with Standard_DEPRECATED macros.
1. Correct building of the lists of intersection faces connected to the same vertex.
2. For the artificially invalid cases with only one invalid face avoid usage of the edges having same origins as invalid edges.
3. Test cases for the issue.
4. Test cases offset shape_type_i_c XM1, ZW*,ZX*,ZY* have been modified to provide more clear result.
5. TODO statements have been removed from the test case offset shape_type_i_c XE6 as it is OK.
6. Test case offset shape_type_i_c ZZ2 is improvement.
The method BRepGProp_Face::LKnots has been corrected to make proper initialization of the output data for the case of a circle.
Added test case bugs/modalg_6/bug27033
StepVisual_StyledItem::Item() now does not call IsKind() on NULL object.
Add several checks for NULL to import/export.
Add test case bugs/step/bug28147
The command OCC426 for test case bugs modalg_2 bug426 has been modified in order to make the test passed. The modification concerns only the old Boolean operation branch (BRepAlgo_Fuse).
Class ShapeAnalysis::Surface is initialized by transformed surface in the method
ShapeFix_Edge::FixAddPCurve (const TopoDS_Edge& edge,const TopoDS_Face& face, const Standard_Boolean isSeam, const Standard_Real prec) in the case when face has location.
Ability to generate UWP solution was added to genproj command, applied when VC version set to "vc14-uwp".
Environment variables are used to find installed Microsoft SDKs.
Visual Studio project option "Use precompiled headers" is set to "Not Using" by default.
Character set option of VS project Unicode is used instead of preprocessor definitions for UWP projects.
OpenGl_LayerList::Render() now calls glDepthMask(GL_TRUE) before clearing depth buffer.
Depth buffer is now cleared even if ZLayer with this command has no structures.
1. Special usage of the common edges not belonging to any invalidity while rebuilding the invalid faces (method IntersectFaces() in BRepOffset_MakeOffset_1.cxx).
Such edges could only be extended to the valid faces boundaries, thus could only split the face and not create any new part.
2. Test cases for the issue.
Treatment of paths in Resource_Manager is corrected to handle properly paths with dots inside.
Extraction of extension from path in DOS mode when working on Linux is corrected in OSD_Path.
Test case added.
New section about scene-graph hierarchy and instancing.
Proofreading of extended section about z-layers.
Removal of obsolete information.
Remarks taken into account.
Mehtod HasIntersection added in NCollection_Map to check whether two given maps contain at least one same item.
'Draw' command and test to check the method were created.
Select3D_SensitiveSet now stores BVH_PrimitiveSet as class field (no dynamic allocation),
and BVH_PrimitiveSet subclass now stores raw pointer to Select3D_SensitiveSet (no smart pointer).
Select3D_BVHPrimitiveContent definition has been moved into Select3D_SensitiveSet
class definition to avoid confusion.
Unused field Select3D_SensitiveSet::myIsLeftChildQueuedFirst has been removed.
The algorithm BRepExtrema_DistShapeShape has been protected against exceptions when non-geometric shape data is given on input, like a face containing triangulation only or an edge containing polygon only. Such faces/edges are ignored by the algorithm.
BRepGProps::VolumeProperties() now ignores faces without geometric surface to avoid access violation.
OpenGl_Workspace::BufferDump() now implicitly converts RGBA dump
into requested BGR, BGRA and RGB image.
DRAW command dversion is improved to report OpenGL variant used (desktop or ES); reporting of version of MSVC is corrected for VC14 and above; reporting of HAVE_OPENCL option is removed.
Usage of command vdump is corrected in some tests to specify extension .png for an image file.
Compiler warning is eliminated in OpenGl_Text.cxx (OpenGL ES mode only).
Check of the gap between ends of the p-curves having common vertex in the parametric space of face similar as in the class BRepCheck_Wire was added.
Check that face lies on the periodic surface was added.
Added check between ends of 2D curves in the 3D space and vertex the same which used in the BRepCheck_Wire::SelfIntersect
Test case for issue CR28094 has been created.
