Weighted, Blended Order-Independent Transparency algorithm has been added rasterization pipeline.
In contrast to classical blending transparency it makes transparent objects look independent
from point of view. It also gives better depth occlusion when being used together with a weight factor
based on value of a GL depth buffer. The feature supports desktop OpenGL, OpenGL ES 3.0, ANGLE
and can be used together with MSAA on desktop GL.
To be used it require availability of:
1) Shaders pipeline.
2) Floating point color format for framebuffer (GL_ARB_color_buffer_float).
3) Multiple render targets (GL_ARB_draw_buffers).
Patch does not modify API and does not require application porting.
It adds new rendering options to Graphic3d_RenderingParams structure:
a) Transparency method from enumeration.
b) Scalar factor [0-1] controlling influence of a fragment's depth to its visibility.
Patch also simplifies processing of transparent objects for standard method:
rendering priority of transparent graphical structures is managed automatically,
therefore there is no need to care about it at application's side.
The method Draw_Interpretor::add() has been corrected so that the command getsourcefile returned the relative path starting with "src" without leading "/" on all platforms.
The reason of the bug is bad start points on surfaces, which are used by searching roots algorithm as start points for iteration process. Starting with these points algorithm for searching roots of set of equations cannot reach correct root. To find correct start points increasing number of sampling points is applied.
A new Shaded presentation flag configured through Datum aspect (NOT as usual Display Mode).
Creation of auxiliary Axis/Point/Plane presentations in Trihedron presentation is removed.
'vtrihedron' DRAW command to change parameters of trihedron is extended to cover whole functionality of AIS_Trihedron.
The following classes are redesignede:
AIS_Trihedron,
Prs3d_DatumAspect.
The followin enumermations are created to manage properties of trihedron:
Prs3d_DatumAttribute,
Prs3d/Prs3d_DatumAxes,
Prs3d_DatumMode
1. Clearance of fields of class has been added to the method BRepFill_PipeShell::Prepare().
2. Calculation of error on surfaces has been corrected in the method GeomFill_Sweep::BuildKPart().
3. New Draw command "errorsweep" has been added to check the error reached on the surfaces built by BRepOffsetAPI_MakePipeShell algorithm.
1. Bug fix in reading old persistent data using FSD_File storage driver
2. Persistence compatible with legacy format was restored for shapes
a. Implemented a storage read / write wrapper for legacy persistence
b. Added DRAW commands to read / write files in legacy format
c. Added test cases for reading / writing operations with checking number of sub-shapes and physical properties
d. Updated related sections of the development guide
- The option SafeInputMode has been added in the class ShapeUpgrade_UnifySameDomain. If it is set then the input shape is protected against modifications of any aspects of its sub-shapes. Default value is true.
- The option "-nosafe" has been added in draw command "unifysamedom". If it is not set the algorithm is run with SafeInputMode switched off.
- New method BRepLib::FindValidRange() has been added. It computes the range of the edge not covered by boundary vertices.
- The algorithm of calculation of valid intersection range in the class IntTools_ShrunkRange has been corrected to use the new method.
- The method BOPTools_AlgoTools::MakeSplitEdge() has been improved to protect against errors in the case of reversed orientation of the input edge.
- Two new Draw commands have been added:
validrange - it calls the new method BRepLib::FindValidRange().
tolsphere - it shows tolerances of vertices by drawing a sphere around each vertex of the shape.
- The test cases "offset shape_type_i_c YE1,YE2" became better. The scripts have been corrected to reflect the new state.
1. Re-orienting the shell before making solid from it (MakeShell in BOPAlgo_ShellSplitter);
2. The implementation of the BOPTools_AlgoTools::IsSplitToReverse() method has been changed to
make the usage of the Hatcher for looking for the point in the face default.
3. Test cases for the issue.
1) BRepLib::UpdateTolerances(..) & BRepLib::SameParameter(..) functions now support non-mutable input feature. reshaper is used to store modified copies of subshapes of original (input) shape(s) as substitutions.
2) IsNewShape(..) method has been added to BRepTools_ReShape to check if the given shape has been recorded as a value
Use Quantity_ColorRGBA instead Quantity_Color in XCAFDoc_Color attribute
Add methods to color tool for processing RGBA
Update Color driver
Update Draw commands
1. Modification in static function IntersectionWithAnArc of IntPatch_ImpImpIntersection :
small offset <du> was hardcoded as 1.e-9, now it is adapted to parametric step.
2. Removal of duplicated points of IntPatch_WLine is corrected.
The Face/Face intersection procedure has been changed in Boolean Operations algorithm.
Previously, the intersection tolerance for all section curves between pair of faces has been calculated
as the maximal tolerance among all curves. Now, each curve has its own valid tolerance calculated
as the maximal deviation of the 3D curve from its 2D curves on faces or surfaces in case there are no 2D curves.
Thus, such methods of IntTools_FaceFace algorithm as TolReached3d(), TolReal() and TolReached2d() have been removed.
Now the tolerances of the curve can be obtained from the curve itself (IntTools_Curve - result of intersection):
- IntTools_Curve::Tolerance() - returns the valid tolerance for the curve;
- IntTools_Curve::TangentialTolerance() - returns the tangential tolerance, which depends on the size of the common
between faces. Currently, this tolerance is computed for Plane/Plane cases only. For other case, the value
of the tangential tolerance is the maximal tolerance of faces.
2D intersection tolerance (IntTools_FaceFace::TolReached2d()) has been completely removed from the algorithm as unused.
1. The packages *QANewModTopOpe*, *QANewBRepNaming* and *QANewDBRepNaming* have been removed as containing obsolete features.
The corresponding QA commands (such as OCC252, OCC307 and OCC294) and test cases have also been removed.
2. The QA command buc60609 has been removed. The corresponding test case bugs/moddata_1/buc60609 has been rewritten using b2dclassify command.
Shell check has been improved to use well-known width-first search. It significantly reduces computation time on the big shells.
Test case has been added.
Minor correction in test case
1. The TestTopOpe* packages have been removed.
2. The commands *compare*, *issubshape* and *projponf* have been moved to BRepTest package.
3. The possibility to change the Extrema options has been added to projection algorithm (GeomAPI_ProjectPointOnSurf).
4. Documentation has been updated.
1. The CellsBuilder algorithm has been extended to work with multi-dimensional arguments.
It has become possible not only simulate Boolean expressions, but also perform non-supported
Boolean operations, like cutting face from solid, or fusing face with edge.
2. Test cases with multi-dimensional input shapes have been created.
3. Documentation has been updated.
1. Removal of the traces of the usage of old Boolean operations in BRepFeat package.
2. The DRAW commands *fubl* and *cubl* based on old Boolean operations have been removed.
The alternative for these commands are the commands *bfuseblend* and *bcutblend* respectively.
The last two commands are based on the modern Boolean operations.
3. The DRAW command *ksection* based on old Boolean operations has been removed.
The command *bsection* should be used as alternative.
Test cases which have been using the *ksection* command have been modified to use the *bsection* command.
4. The class QANewBRepNaming_BooleanOperation has been modified to use modern Boolean operations.
The class QANewBRepNaming_BooleanOperation has been removed as not used.
The class QANewBRepNaming_BooleanOperationFeat has been renamed to QANewBRepNaming_BooleanOperation as it has nothing to do with Feat algorithm.
1. Using appropriate intersection tolerance for splitting the degenerated edges in Boolean operations (void BOPAlgo_PaveFiller::FillPaves()).
2. Avoid creation of the wires consisting of degenerated edges only (BOPAlgo_WireSplitter).
3. Test case bugs/moddata_2/bug469 has been corrected to obtain valid result of operation. TODO statements have been removed from the case.
The cause of the bug was computation of incorrect UVBounds in the method ShapeAnalysis::GetFaceUVBounds. In this patch the computation of a box for a 2D curve in the method ShapeAnalysis_Curve::FillBndBox() has been improved taking into account intervals of C2 continuity.
Also the fix makes little extension of bounds when making the new surface in ShapeUpgrade_FaceDivide::SplitSurface(), so that all p-curves were fully inside.
Test case for issue CR28553
- The methods "Modified" and "IsDeleted" have been added for history support in "ShapeUpgrade_UnifySameDomain" class.
- The new Draw commands "unifysamedommod" and "unifysamedomisdel" have been added.
- Adoption of other algorithms using this one to its new behavior.
Removing code duplication
Correcting regressions
Correcting remarks
Generation of 3D-steps shorter than 3D tolerance has been allowed in the fix to build Walking-line.
Now, 3D-step is limited by Precision::Confusion value.
1. The partition operation allows splitting an arbitrary number of shapes of an arbitrary dimension
by other arbitrary shapes. The algorithm has been implemented in the class BOPAlgo_Splitter.
The API operator Splitter has been implemented in the class BRepAlgoAPI_Splitter.
2. The draw commands for usage the new algorithm have been implemented - bsplit and bapisplit.
The commands are identical, but one uses the BOPAlgo_Splitter, the other uses BRepAlgoAPI_Splitter.
Both commands should be used after Pave Filler is filled.
3. Test cases for the new algorithm.
4. Documentation has been updated.
Small corrections.
1. The algorithm BOPAlgo_ShellSplitter has been improved for the cases with multi-connected edges
to produce as many shells as possible from the given input faces.
2. Building tool prism in BRepFeat_MakePrism has been changed in order to avoid self-intersections
in the cases when the limiting faces are intersecting.
3. Test cases for the issue.
4. Test cases boolean/bcut_complex/N9 and boolean/gdml_private/ZH3 are improvements.
5. Test cases boolean/volumemaker/C5 and boolean/volumemaker/C6 has been marked as BAD due to found problem in intersection algorithm.
The results in these cases obtained on the branch are better than on master, but still not complete.
Adjusting test case bugs/moddata_2/bug469 for its current behavior.
1. Exception in intersection of two analytical faces has been fixed by adding a simple check on number of vertices
in the resulting analytical curve;
2. Projection of the Circle on the Cone now checks if the Circle's normal direction is parallel to the Cone direction.
If it is not, the different, more advanced, algorithm will be used for projection - ProjLib_ComputeApprox;
3. Intersection of the Edge with the Face (IntTools_EdgeFace algorithm) in QuickCoincidenceCheck mode has been fixed to
avoid the checking of the type of the intersection result if the coincidence check gives the positive result;
4. All common IN edges of the intersecting faces has been added for intersection with section edges to avoid self-intersection in the result;
5. Post treatment of the section edges in Boolean operations has been improved with the new stage which treats the possible
common zones, not detected by the intersection algorithm, between faces by intersecting each section edge with all faces,
not participated in its creation, and in case of coincidence putting it as IN edge into FaceInfo structure of the face.
The new function has been implemented for that - BOPAlgo_PaveFiller::PutSEInOtherFaces().
6. Checking for the SameDomain splits of faces in Boolean Operations has been modified to process the pairs of faces in
which both the section curves and common zones are present.
7. Adjustment of the test case boolean gdml_private ZH3 as improvement.
8. Test cases for the issue.
9. Test cases for the parent issue - 0026789.
While checking the SurfaceOfExtrusion on closeness (GeomLib::IsClosed())
it is necessary to take into account that the basis curve may be not trimmed.
Test case for the issue.
Looking for inverted edges among the neutral ones while checking the offset edges on validity (BRepOffset_MakeOffset_1::FindInvalidEdges).
Test cases for the issue.
The main idea of the fix is to forbid check if intersection curve lies in the some face (with input tolerance) if we have 2D-intersection curve on this face (we consider that necessary tolerance has been computed in intersection algorithm honestly). If we do not have 2D-curve on this face then we need check as before.
New algorithm is implemented in IntTools_Context::IsValidBlockForFaces(...) method.
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src\Extrema\Extrema_GenExtPS.cxx
No principled changes have been made.
Virtual method Generated is redefined. Now it returns:
- chain of generated faces for sub-edge of a profile;
- chain of generated edges for sub-vertex of a profile;
- bunch of chains of generated edges for start or end vertex if it is degenerated section.
Correction according to the remarks.
Fix compiler's warnings and add 4 new test cases.
Correction of mistake.
Compilation warnings are gone.
Graphic3d_RenderingParams::RenderResolutionScale - added new option
defining scale factor for allocating off-screen rendering buffers
relative to native resolution of window buffer.
Scale factor can be below 1.0 (lower resolution) or higher (as analog of super sampling),
but can not be combined with MSAA settings.
Draw Harness command vrenderparams has been extended with option -rendScale
managing introduced option Graphic3d_RenderingParams::RenderResolutionScale.
vcaps has been extended with option -useWindowBuffer for managing
OpenGl_Caps::useSystemBuffer option.
vrepaint has been extended with option -immediate
for testing immediate layer redraw
OpenGl_View::blitBuffers() - eliminate compiler warning on Android
Existing OCCT path tracing engine used very simple additive material (BSDF) model, so it was possible to reproduce
behavior only of very basic materials such as metal, glass, or plastic. However, some important in CAD industry
materials like car paint or ceramic could not be modeled well. In this patch, OCCT BSDF was significantly improved
by replacing additive model with two-layered scattering model. Therefore, we have base diffuse, glossy, or transmissive
layer, covered by one glossy/specular coat. The layers themselves have no thickness; they can simply reflect light or
transmits it to the layer under it. Balancing different combinations of layer properties can produce a wide range of
different effects. At the same time, disabling the first (coat) layer allows to keep full compatibility with previously
supported scattering model. All new parameters are available via 'vbsdf' command.
Location of new sample for few material examples:
samples\tcl\pathtrace_materials.tcl
Fix shader compilation issue.
Fix test case sample_ball_alpha.
Shaders_PathtraceBase_fs.pxx - regenerate resource from origin
New method CheckFaceSelfIntersection has been added to BOPAlgo_CheckerSI: now self-intersection of each face is found as well as pairs of intersecting faces;
-method IntPatch_Intersection::Perform(S1,D1,TolArc,TolTang) is modified for more effective search of self-interasections in case of Surface Of Extrusion;
-method IntCurve_IntPolyPolyGen::Perform(C1,D1,TolConf,Tol,NbIter) is modified to detect segments of intersections.
Small correction.
Test cases are corrected.
Correction of compiler error
Fix of regressions
Names of shapes correction
