HD81050: IGES : IGES FILE IS NOT IMPORTED CORRECTLY

APAR status

• Closed as suggestion for future release.

Error description

• IGES : IGES file is not imported correctly
  .
  SCENARIO:
  1. Open attached IGES file.
  2. Click on Fit to screen option
  .
  PROBLEM:
  Only points and 2 curves are visible. Surface
  imported in Geometry Fails and Curve imported by
  name BSC000CA is not correct form.
  .
  

Local fix

Problem summary

Problem conclusion

Temporary fix

Comments

• THIS APAR IS CONSIDERED AS A SUGGESTION
  FOR IMPROVEMENT FOR CATIA.
  PLEASE CONTACT YOUR SUPPORT DEPARTMENT IN
  ORDER TO OPEN A REQUIREMENT FORM.
  .
  One of the edge of the loop is wrongly positioned:
  its 2D geometry is superposed with the geometry
  of other Edge of the loop, which should not be. 2D
  geometry should be
  found on the left side (u=0) of the first subdivision
  CATSurface, instead is on right side. The cause of
  this misplacment is due to 12 Projection failures
  .
  Presently, IGES Import is performed in SplitSurf
  mode, which is the good one. IGES engine M2V5
  import code, do not provide loop orientation
  information, hence do not clearly deal with closed
  surfaces geometries. In order to get the required
  quality in IGES / CATIA imports better
  management of loop orientation is needed. The
  IGES surface in this scenario is represented by 3
  CATNurbsSurface, instead of 2 canonical surfaces,
  which is the "usual" scheme of surface split
  performed on closed surfaces coming from IGES.
  .
  Present, IGES import algorithm for closed surfaces
  (orientation reversing combined with 2D geometry)
  are developed for 'standard' surface split cases
  based on 2 canonical CATSurface, and not on 3
  CATNurbsSurface.
  .
  New development is needed to improve treatment
  of closed surfaces. This involves modifying the
  specification of the algorithm.
  .
  

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

Applicable component levels