0030961: HLRBRep_Algo/HLRBRep_HLRToShape return empty compound

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Date Submitted

Last Update

0030961

Community

[OCCT] OCCT:Modeling Algorithms

public

2019-09-11 18:21

2020-07-04 22:07

Reporter

wandererfan

Assigned To

msv

Priority

normal

Severity

block

Status

new

Resolution

open

Platform

Linux Mint and Win7

OS Version

Product Version

[OCCT] 7.3.0

Target Version

Fixed in Version

Summary

0030961: HLRBRep_Algo/HLRBRep_HLRToShape return empty compound

Description

Valid shape produces empty result when passed through HLRBREP_Algo. Same shape produces good result when passed through HLRBRep_PolyAlgo.

DRAWEXE fails with message "Error: AIS_Shape::Compute() HLR Algorithm has failed ()"

Steps To Reproduce

pload MODELING VISUALIZATION
restore bulletShape.brep s
vclear
vinit View1
vdisplay -dispMode 1 s
vfront
vfit
# polyAlgo is OK
vhlr on -algoType polyAlgo
# algo fails
vhlr on -algoType algo

Fails with construction error exception in gp_Dir due to zero normal in Contap_Contour:

     TKHLR.dll!gp_Dir::gp_Dir(const gp_Vec & V) Line 32	C++
>	TKHLR.dll!Contap_Contour::Perform(const opencascade::handle<Adaptor3d_TopolTool> & Domain) 
Line 1709	C++
     TKHLR.dll!Contap_Contour::Perform(const opencascade::handle<Adaptor3d_HSurface> & Surf, 
const opencascade::handle<Adaptor3d_TopolTool> & Domain) Line 166	C++
     TKHLR.dll!HLRTopoBRep_DSFiller::Insert(const TopoDS_Shape & S, Contap_Contour & FO, HLRTopoBRep_Data 
& DS, NCollection_DataMap<TopoDS_Shape,BRepTopAdaptor_Tool,TopTools_ShapeMapHasher> & MST, 
const int nbIso) Line 102	C++
     TKHLR.dll!HLRTopoBRep_OutLiner::Fill(const HLRAlgo_Projector & P, NCollection_DataMap<TopoDS_Shape,BRepTopAdaptor_Tool,TopTools_ShapeMapHasher> 
& MST, const int nbIso) Line 96	C++
     TKHLR.dll!HLRBRep_ShapeToHLR::Load(const opencascade::handle<HLRTopoBRep_OutLiner> & S, 
const HLRAlgo_Projector & P, NCollection_DataMap<TopoDS_Shape,BRepTopAdaptor_Tool,TopTools_ShapeMapHasher> 
& MST, const int nbIso) Line 54	C++
     TKHLR.dll!HLRBRep_InternalAlgo::Update() Line 106	C++

execute DRAWEXE bulletShape.brep as follows:

wandererfan@huxley ~ $ occDraw.sh
OCCT DRAWEXE v7.3.0
Hint: use "pload ALL" command to load standard commands
Draw[1]> Draw[2]> pload ALL
1
Draw[3]> restore bulletShape.brep
bulletShape
Draw[4]> vinit
Driver1/Viewer1/View1
Draw[5]> vdisplay bulletShape
Draw[6]> vfront
Draw[7]> vfit
Draw[8]> vhlrtype algo
Draw[9]> vhlr on
Error: AIS_Shape::Compute() HLR Algorithm has failed ()

Draw[10]> vhlr off
Draw[11]> vhlrtype polyalgo
Draw[12]> vhlr on
Draw[13]> exit
OCCT DRAWEXE v7.3.0 finished
wandererfan@huxley ~ $

Additional information
and documentation updates

FreeCAD bug report may have additional information: https://www.freecadweb.org/tracker/view.php?id=4122 [^]

Issue History
Date Modified	Username	Field	Change
2019-09-11 18:21	wandererfan	New Issue
2019-09-11 18:21	wandererfan	Assigned To	=> msv
2019-09-11 18:21	wandererfan	File Added: bulletShape.brep
2020-07-04 22:06	kgv	Steps to Reproduce Updated	View Revisions
2020-07-04 22:07	kgv	Steps to Reproduce Updated	View Revisions

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