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IDProjectCategoryView StatusDate SubmittedLast Update
0007691CommunityOCCT:Visualizationpublic2005-01-11 14:242012-03-29 17:26
ReporterabvAssigned Tobugmaster  
PrioritynormalSeveritytrivial 
Status closedResolutionfixed 
OSAll 
Target Version6.5.2Fixed in Version6.5.2 
Summary0007691: Wrong hidden lines computed by HLRBRep_PolyAlgo and HLRBRep_PolyHLRToShape in OCC 5.1
DescriptionThis bug has been reported on OCC Forum by Paul Borowski, see thread 6628:
http://www.opencascade.org/org/forum/thread_6628

The fix is suggested by the same person, see below both description and fix:

--------------------

My application was written under OCC 50 and uses HLRBRep_PolyHLRToShape and
HLRBRep_PolyAlgo to compute hidden lines.
The code looks like this:
for (int i = 0; i < n; i++)
{
BRepMesh::Mesh(Shape(i), Deflection);
.....
m_HLR_Algo.Load (Shape(i));
}

m_HLR_Algo.Update();
m_aHLRToShape.Update(&m_HLR_Algo);
.....

// Create the result shape
TopoDS_Compound Shape;
BRep_Builder B;
B.MakeCompound(Shape);

TopoDS_Shape VCompound = m_aHLRToShape.VCompound(S);
if (!VCompound.IsNull())
{
B.Add(Shape, VCompound);
}

VCompound = m_aHLRToShape.OutLineVCompound(S);
if (!VCompound.IsNull())
{
B.Add(Shape, VCompound);
}
It works great under OCC50. Under OCC51, however, all shapes, which were added
to the HL algorithm seems to be transparent and all lines are returned as
visible! Any ideas, what can be a problem?

Regards,

Paul

----------

I spend a lot of time trying to fix the bug I have reported, but at last I had
success with it!

A solution for my problem:
Open ModellingAlgorithms project and take a look in the
OCC5.2\src\HLRBRep\HLRBRep_PolyAlgo.cxx file:

...
3654 // Tri1Flags &= ~FMskBack;
3655 Tri1Flags |= FMskBack;//OCC349
...

now comment out the line 3655 and restore the line 3654:

3654 Tri1Flags &= ~FMskBack;
3655 // Tri1Flags |= FMskBack;//OCC349

Recompile TKHLR.dll.

That's all.

-----------------

Note that according to information from VTN, this bug is likely a consequence of
fixing some other bug in HLR (probably OCC349?).
Additional information
and documentation updates		Changes:
There are following changes in packages:
ViewerTest package:
New DRAW command vcomputehlr has been added to display result of HLR algo for shape object in v3d view:

vcomputehlr ShapeName HlrName [ EyeX EyeY EyeZ LookX LookY LookZ ] ,

where ShapeName is the name of initial shape being processed by HLR algo; HlrName is the name of interactive object that will be created to display result of HLR algorithm in v3d view; { EyeX, EyeY, EyeZ }, { LookX, LookY, LookZ } is the position of projector and direction of projection.
If position and direction are not defined command takes a position and view direction of an active v3d view.
TagsNo tags attached.
Test case numberchl 934 B4

Attached Files

  • HLRBRep_PolyAlgo.cxx.gz (18,932 bytes)
  • HLRBRep_PolyAlgo.7z (14,804 bytes)
  • 7691test.tcl (1,340 bytes)
  • bottle.brep (405,604 bytes)
  • chl_934_B4.tar.gz (742 bytes)

Activities

2008-08-13 14:27

 

HLRBRep_PolyAlgo.cxx.gz (18,932 bytes)

2011-04-28 17:54

 

HLRBRep_PolyAlgo.7z (14,804 bytes)

bugmaster

2011-08-09 12:39

administrator   ~0017936

Dear Anton,

Please prepare branch for bug , merge with files from
HLRBRep_PolyAlgo.7z and then make revision in order to tests this
fix for development version

apl

2011-08-11 14:38

developer   ~0017960

Dear bugmaster,

SVN branch http://svn/svn/occt/branches/OCC7691 has been created and reviewed.
The branch passed review without remarks and ready for test.

miv

2011-08-31 11:03

tester   ~0018042

Last edited: 2011-11-25 11:43

 Dear Anton,

Please provide the test script for this bug.
--
Regards,
Mike

miv

2011-09-01 11:57

tester   ~0018051

Last edited: 2011-11-25 11:44

 Dear BugMaster,

The wokbench KAS:dev:mkv-OCC7691-products was tested on linux platform.

Regressions cases were not found.

--
Regards,
Mike

apl

2011-09-01 15:54

developer   ~0018058

Last edited: 2011-11-25 11:44

 Dear Mike,

It is necessary to write an additional test command for testing this issue, this command will be based on same code as in comments. Writing a test script will be possible only if command will produce bad result without this fix.

At the moment I begin to write this command, but of course, this will take an additional time, so I'll provide such a command/script soon.

Regards,
APV

apl

2011-09-06 13:37

developer  

7691test.tcl (1,340 bytes)

apl

2011-09-06 13:41

developer   ~0018076

Dear Mike,

You can use test script for this issues "7691test.tcl";

New DRAW command vcomputehlr has been added: file ViewerTest_ObjectCommands.cxx has been modified in SVN branch http://svn/svn/occt/branches/OCC7691

apl

2011-09-09 13:01

developer  

bottle.brep (405,604 bytes)

mkv

2011-09-09 13:32

tester   ~0018100

Last edited: 2011-11-25 11:45

 Dear BugMaster,
Workbench KAS:dev:mkv-OCC7691-occt has been created from SVN branch http://svn/svn/occt/branches/OCC7691
(and mkv-OCC7691-products from trank) and compiled on Linux platform.

Test case for this bug is chl/934/B4 is OK in mkv-OCC7691-products.
There are not regressions in mkv-OCC7691-products regarding to KAS:dev:products-20110902-opt

See results in /QADisk/occttests/results/KAS/dev/mkv-OCC7691-products_08092011/lin
See reference results in /QADisk/occttests/results/KAS/dev/products-20110902-opt_05092011/lin
See test cases in /QADisk/occttests/tests/ED
N.B. In order to launch testing case you can make use the following instructions
http://doc/doku.php?id=occt:certification

mkv

2011-09-09 13:59

tester  

chl_934_B4.tar.gz (742 bytes)

bugmaster

2011-09-09 14:15

administrator   ~0018101

Date: 2011-09-09 14:14:53 +0400 (Fri, 09 Sep 2011)
New Revision: 8991

Modified:
   trunk/src/HLRBRep/HLRBRep_PolyAlgo.cxx
   trunk/src/ViewerTest/ViewerTest_ObjectCommands.cxx

Related Changesets

occt: master 3fc57801

2011-09-09 10:14:53

bugmaster

Details Diff		 0007691: Wrong hidden lines computed by HLRBRep_PolyAlgo and HLRBRep_PolyHLRToShape in OCC 5.1 Developed : IFV, VSV and APL Affected Issues
0007691
mod - src/HLRBRep/HLRBRep_PolyAlgo.cxx Diff File
mod - src/ViewerTest/ViewerTest_ObjectCommands.cxx Diff File

Issue History

Date Modified Username Field Change
2005-01-11 14:38 bugmaster Channel => Internal
2005-01-12 16:13 bugmaster Status closed => assigned
2005-01-12 16:13 bugmaster Resolution suspended => @0@
2005-01-12 16:13 bugmaster Assigned To bugmaster => san
2008-08-13 16:48 bugmaster Assigned To san => ifv
2008-08-13 16:48 bugmaster Status assigned => resolved
2011-04-06 18:46 bugmaster Assigned To ifv => szy
2011-04-06 18:46 bugmaster Status resolved => assigned
2011-04-07 15:31 szy Assigned To szy => kgv
2011-04-07 18:10 bugmaster Assigned To kgv => apl
2011-04-21 14:39 bugmaster Assigned To apl => vsv
2011-04-28 17:53 vsv Status assigned => resolved
2011-08-02 11:24 bugmaster Category OCCT:VIZ => OCCT:Visualization
2011-08-09 12:39 bugmaster Note Added: 0017936
2011-08-09 12:39 bugmaster Assigned To vsv => apl
2011-08-09 12:39 bugmaster Status resolved => assigned
2011-08-11 14:38 apl Note Added: 0017960
2011-08-11 14:39 apl Status assigned => reviewed
2011-08-31 11:03 miv Note Added: 0018042
2011-09-01 11:57 miv Note Added: 0018051
2011-09-01 15:54 apl Note Added: 0018058
2011-09-06 13:37 apl Description Updated
2011-09-06 13:37 apl Additional Information Updated
2011-09-06 13:37 apl File Added: 7691test.tcl
2011-09-06 13:41 apl Note Added: 0018076
2011-09-09 13:01 apl File Added: bottle.brep
2011-09-09 13:32 mkv Note Added: 0018100
2011-09-09 13:32 mkv Status reviewed => tested
2011-09-09 13:59 mkv Test case number => chl 934 B4
2011-09-09 13:59 mkv File Added: chl_934_B4.tar.gz
2011-09-09 14:15 bugmaster Note Added: 0018101
2011-09-09 14:15 bugmaster Status tested => verified
2011-09-09 14:16 bugmaster Fixed in Version 6.3.0 =>
2011-09-09 14:16 bugmaster Target Version => 6.5.2
2011-11-25 11:43 szy Note Edited: 0018042
2011-11-25 11:44 szy Note Edited: 0018051
2011-11-25 11:44 szy Note Edited: 0018058
2011-11-25 11:44 szy Note Edited: 0018100
2011-11-25 11:45 szy Note Edited: 0018100
2012-03-29 17:26 bugmaster Changeset attached => occt master 3fc57801