Archived issue #0032496

Data Exchange - STEP surface_of_revolution does not display

CommunityOCCT:Data Exchangenew4 public notes

Description

The two STEP surface_of_revolution surfaces do not display in CAD Assistant or our software based on OCCT. The surfaces are correctly displayed in C3D Viewer and IDA-STEP Viewer.

Steps to reproduce

pload XDE OCAF VISUALIZATION MODELING
ReadStep D c:/work/Attachment 3 (STP)
vinit View
XDisplay D -dispMode 1
vfit
XGetOneShape s D
checkshape s s
trinfo s

Output:

19:21 Count	STEP Reader Warnings for 'Attachment 3 (STP)'
       -----	-----------
           4	W:ORIENTED_EDGE: Parameter n0.2 (edge_start) not Derived
           4	W:ORIENTED_EDGE: Parameter n0.3 (edge_end) not Derived
          Nb Total:8  for 2 items
19:21 Count	STEP Translator Warnings for 'Attachment 3 (STP)'
       -----	-----------
           1	W:ADVANCED_FACE: Missing seam-edge added
          Nb Total:1  for 1 items
...
  Check                                    Count
 ------------------------------------------------
  Unorientable Shape ....................... 2
  Not Closed ............................... 2
 ------------------------------------------------
...
This shape contains 3 faces.
                    2 empty faces.
                    87 triangles.
                    89 nodes.
                    3 polygons on triangulation.
Maximal deflection 0.045204761150637499

Public activity

4 archived notes

Participants are labeled by their role within this record.

01Commenter 22021-07-28 18:57

Dear Robert,

please don't forget attaching file samples (consider compressing STEP files using 7zip in case if they are large).

[signature removed]
Kirill

02Commenter 22021-07-28 19:28

Attaching screenshots with expected shape presentation would be also helpful.

03Author2021-07-28 20:00

Screenshot attached. Is it possible that there is an issue with the STEP file for the oriented_edge entities? Should the edge_start and edge_end be explicitly defined?

04Commenter 22021-07-28 20:07

Thanks for screenshots.

STEP translator generates warnings which might indicate some issues with file (don't know if these are important or not):

19:21 Count	STEP Reader Warnings for 'Attachment 3 (STP)'
       -----	-----------
           4	W:ORIENTED_EDGE: Parameter n0.2 (edge_start) not Derived
           4	W:ORIENTED_EDGE: Parameter n0.3 (edge_end) not Derived
          Nb Total:8  for 2 items
19:21 Count	STEP Translator Warnings for 'Attachment 3 (STP)'
       -----	-----------
           1	W:ADVANCED_FACE: Missing seam-edge added
          Nb Total:1  for 1 items

And produced shape doesn't pass checkshape validation - with unorientable and non-closed errors.

Related records