HD88607: FSS: SURFACIC CURVATURE ANALYSIS COLOR DISPLAY RESULT IS NOT OK WHEN FIXED 3D ACCURACY=0.02

APAR status

• Closed as Permanent restriction.

Error description

• SCENARIO:
  1. Start CATIA V5
  2. Open the CATPart.
  Workbench:
  Freestyle
  3. Click Shading with Material icon.
  View mode is
  changed.
  4. Confirm that Fixed 3D accuracy=0.20 at Tools /
  Option / general / display / Performance
  5. Double click the
  Surfacic Curvature Analysis.1 from specification
  tree.
  Surfacic Curvature Analysis window is opened.
  6. Please
  select following
  Type- -Minimum
  Display Options
  Color
  Scale-activate
  On The Fly-activate
  Analysis Options
  Positive
  only-activate
  Radius Mode- activate
  7. Select the EdgeFillet.4
  or Geometry.
  Observation: Display result is Ok
  8. Go to Tools
  / Option / general / display / Performance and change Fixed 3D
  accuracy to 0.02 or 0.01
  9. Repeat steps 5 to7
  .
  PROBLEM:
  A
  surface connection checker color display result is not OK at
  the portion where two or more fillets are connected.
  

Local fix

Problem summary

• SCENARIO:
  1. Start CATIA V5
  2. Open the CATPart.
  Workbench:
  Freestyle
  3. Click Shading with Material icon.
  View mode is
  changed.
  4. Confirm that Fixed 3D accuracy=0.20 at Tools /
  Option / general / display / Performance
  5. Double click the
  Surfacic Curvature Analysis.1 from specification
  tree.
  Surfacic Curvature Analysis window is opened.
  6. Please
  select following
  Type- -Minimum
  Display Options
  Color
  Scale-activate
  On The Fly-activate
  Analysis Options
  Positive
  only-activate
  Radius Mode- activate
  7. Select the EdgeFillet.4
  or Geometry.
  Observation: Display result is Ok
  8. Go to Tools
  / Option / general / display / Performance and change Fixed 3D
  accuracy to 0.02 or 0.01
  9. Repeat steps 5 to7
  .
  PROBLEM:
  A
  surface connection checker color display result is not OK at
  the portion where two or more fillets are connected.
  

Problem conclusion

• THIS PROBLEM IS PERMANENT RESTRICTION IN CATIA
  Additional
  Closure Information:
  INCIDENT DIAGNOSIS: Color display result
  of Surfacic curvature analysis is incorrect when fixed 3D
  accuracy=0.02 or 0.01
  RESTRICTION EXPLANATION:
  The surfacic
  curvature analysis computes the minimum radius on each
  location of tessellation. When 3D accuracy= 0.20, there are
  less triangles and hence less number of locations while
  computing the minimum radius compared to that when 3D accuracy
  is 0.02 or 0.01
  This can be observed by visualizing the
  geometry in triangles.
  When 3D accuracy=0.20, all the
  locations are on points where the surfacic curvature is
  greater or equal to 2mm and hence it is shown in correct
  corresponding color.
  However when 3D accuracy=0.02 or 0.01,
  more number of points are taken into consideration while
  computing the result. Some of these points are smaller than
  2mm. Hence surfacic curvature shows some area in different
  color.
  Note that the geometric accuracy of all geometric
  elements is 0.001mm. However it is not the case that fillet
  radius will be exactly 2mm everywhere.
  The geometric
  resolution of 0.001mm or even the numerical resolution
  (approximately 10e-12) can compute the result as 2.0000000001
  or 1.999999 and therefore curvature display result is shown in
  different colors just due to this precision phenomenon.
  

Temporary fix

Comments

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