0031610: HLRBRep_Algo removes visible edge

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Date Submitted

Last Update

0031610

Community

[OCCT] OCCT:Modeling Algorithms

public

2020-06-13 09:16

Reporter

CarloGreen

Assigned To

msv

Priority

normal

Severity

major

Status

new

Resolution

open

Platform

x64, MS VC 2019

Windows

OS Version

Product Version

[OCCT] 7.3.0

Target Version

Fixed in Version

Summary

0031610: HLRBRep_Algo removes visible edge

Description

The hidden line removal algorithm declares an edge as invisible, but it should be a visible line instead.

When the HRL is activated, the edge in the top right of the view disappears. It should stay visible, since it is clearly seen by the camera.

Steps To Reproduce

To reproduce the problem, I attached a .brep file and the following drawexe script to show the problem. Compare the two views. In the second view, the edge on the top right is imissing.

pload ALL
restore DVPScaled.brep shapes
vinit
vdisplay shapes
vviewproj front
vfit

#this second view shows the problem of the missing line. Compare to the first view.
vinit
vviewproj front
vfit
vhlrtype algo
#the next line erroneously makes a line in the view disappear
vhlr on

Additional information
and documentation updates

Tested with OCCT 7.4.0 and OCCT 7.4.1-devel.

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No tags attached.

Test case number

Attached Files

DVPScaled.brep (8,682 bytes) 2020-06-13 09:16

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Issue History
Date Modified	Username	Field	Change
2020-06-13 09:16	CarloGreen	New Issue
2020-06-13 09:16	CarloGreen	Assigned To	=> msv
2020-06-13 09:16	CarloGreen	File Added: DVPScaled.brep