0031567: Data Exchange - Imported STeP model is missing two surfaces

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0031567

Community

[OCCT] OCCT:Data Exchange

public

2020-05-15 15:44

2020-06-04 14:59

Reporter

ventu

Assigned To

gka

Priority

normal

Severity

major

Status

new

Resolution

open

Platform

OS Version

Product Version

[OCCT] 7.4.0

Target Version

Fixed in Version

Summary

0031567: Data Exchange - Imported STeP model is missing two surfaces

Description

(This is really on 7.4.0, but that version is not available for selection).

I analyzed one of the two surfaces (#586) and I see two problems.

A) EDGE_CURVE #49 is a NURBS with parametrization [0,1]: it's closed but not periodic.
It's limited by the same vertex, which projects at 0.997..., so its parametrization should become [0.997...,1.997...]. However, at StepToTopoDS_GeometricTool.cxx:305, these values are reset to [0,1].

B) Don't know if this is related to the above, but the face imports with 2 trimming edges, while in the STeP file there are 4.

So the resulting loop doesn't make much sense.

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Attached Files

STOCK_IMPELLER.STEP (72,569 bytes) 2020-05-15 15:44

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Issue History
Date Modified	Username	Field	Change
2020-05-15 15:44	ventu	New Issue
2020-05-15 15:44	ventu	Assigned To	=> gka
2020-05-15 15:44	ventu	File Added: STOCK_IMPELLER.STEP
2020-06-04 14:59	kgv	Summary	Imported STeP model is missing two surfaces => Data Exchange - Imported STeP model is missing two surfaces
2020-06-04 14:59	kgv	Product Version	7.3.0 => 7.4.0