HD17684: GENERATIVE DRAFTING / ISOMETRIC VIEW IS NOT CORRECT

APAR status

• Closed as suggestion for future release.

Error description

• GENERATIVE DRAFTING / ISOMETRIC VIEW IS
  NOT CORRECT
  .
  

Local fix

Problem summary

Problem conclusion

Temporary fix

Comments

• THIS APAR IS CONSIDERED AS A SUGGESTION
  FOR IMPROVEMENT WHICH CANNOT BE
  INCORPORATED IN VERSION V5R14
  PLEASE CONTACT YOUR SUPPORT DEPARTMENT IN
  ORDER TO OPEN A REQUIREMENT FORM.
  .
  Incident Diagnosis
  Many unresolved intersections or duplicated parts
  between solids (collisions). The HLR algorithm does
  not resolve properly these intersections, so it may
  lead to bad results.
  .
  Development Request Justification
  The "Exact" projection mode in projection views
  and section views uses a projection algorithm that
  has the following restriction:
  In case of clash (intersection) between bodies to be
  projected, the result of the projection may contain
  incorrect results, some edges of these bodies may
  appear even if they should be hidden, or disappear
  even if they are not hidden.
  These clashes should be avoided, as they
  correspond to non-nominal cases of collision
  between two parts in an assembly or two bodies in
  a part. In this case the assembly or part should be
  modified, either by moving the parts/bodies to
  avoid the clash, or by using boolean operations in
  order to generate a single body resulting of the
  intersection (and in this case the edge representing
  the border of the collision will appear)
  The only case of clash which is nominal in an
  assembly is when you model a screw in a threaded
  hole (for example a bolt). In this case the use of
  the thread information on the shaft and on the hole
  results in a case of clash. For example a M10
  threaded shaft has a diameter of 10mm which
  corresponds to its external diameter, whereas a
  M10 threaded hole has a diameter of 8.376, which
  corresponds to its inner diameter.
  Enhancing the current projection algorithm in order
  to solve the general cases of collisions is an
  enhancement request cannot be done, since
  a) It requires making important and impacting
  changes in the foundations of the algorithm
  b) It would lead to non acceptable CPU
  performance for this additional processing.
  We are currently studying how to solve this
  restriction for the case of threads, which is a mid-
  term development, since it requires either changing
  the model for threads on parts, or re-engineering
  the projection algorithm to support this case (which
  does not mean supporting all cases of non nominal
  clashes).
  This is an enhancement request which has no
  targeted release.
  .
  Answer and By-Pass
  Perform boolean operations between collided solids
  and put duplicated parts in no-show before drawing
  to obtain correct results.
  Note that you can use the "DMU Space Analysis"
  tool to check clashes.
  .
  

APAR Information

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

Fix information

Applicable component levels