difference between copy geometry and publish geometry

[er_pradip]

Hi,

Help from you guys is required in understanding the subject mentioned.

Regards

Pradip kumar

[dgschaefer]

Two ends of the same string.

Publish Geometry is used in the source model to 'gather' a set of
geometry items (datum planes, points, curves, quilts, etc.) for
publication, or sending out to another model.

Copy Geometry is used in the target model to select geometry to copy
from the source. This can be done by selecting the publish geometry
feature in the source (a more robust and easier to manage solution) or
by individually selecting geometry items (datum planes, points, curves,
quilts, etc.).

Publish collects geometry to be sent out.

Copy gathers geometry to be brought in.

Doug Schaefer

[ptc-593619]

Couple of minor points - Publish geometry can be use to collect data at
a certain point in the model, say before machining cuts etc. by the use
of copy and paste AT A REQUIRED POINT in the model. Otherwise you get
the end result wherever the publish geometry is in the model tree.

Publish geometry is not backward compatible, anything you do after you
used it does not affect the original model.



Richard A. Black

Senior Engineer

Eaton Corporation

16900 Aberdeen Road

Laurinburg, NC. 28353

[dgschaefer]

Excellent point, it does capture a place in time. This can have a
profound effect on copying quilts. Any new surfaces created and added
to the quilt after the publish geom will not bee seen in the published
quilt.

What I do in my skeletons is add my publish geometry features to the
footer of the model tree (RMB -> send to footer) so they are always at
the bottom of the feature list. Of course, occasionally I want to
capture a moment in time, and then a publish geom is great and I leave
it in the tree at the appropriate spot.

I'm not sure what you mean by "Publish geometry is not backward
compatible, anything you do after you used it does not affect the
original model." Are simply referring to how you cannot add later
features in the tree to the publish geom? Publish geom features are two
way compatible as changes to the source model are reflected in the
publish geom and therefore the target model as well.

Doug Schaefer

[ptc-211676]

Doug,





I tell people that Publish Geom publishes out selected features as they
appear in the fully regenerated model regardless of where the Publish
Geom appears in the model tree - as if the Publish Geom is always at the
end of the model tree.



Can you elaborate on using Publish Geom to capture a point in time? To
do this, I make a copy of either solid surfaces or specific surfaces and
then publish out that quilt. Does Publish Geom allow this automatically?





Regards,

Paul



Paul Bertram

Radius Product Development

Innovation Realized

[dgschaefer]

You know, I may need to backpedal a bit. The more I think about it, I
can recall having to make copies of surfaces to do this because the
publish geom didn't act as I expected. The publish captured the surface
as it was at the end of the model, rather than at the point of the tree
where the publish was created.

I actually don't do this much, nearly all my publish geoms go to the
footer. Perhaps someone with more experience can elaborate on using a
publish geom in the middle of the tree.

Sorry for causing confusion.

Doug Schaefer

[ptc-593619]

In raising my points, I seem to have added to the confusion. A published
geometry wherever in the tree will reflect the whole feature tree UNLESS
(as Paul says), you place a quilt of solid or specific surfaces in the
tree and point to that in the PG.

By saying not backward compatible, I meant that changes to the target
will not affect the source - as I was informed when applying "shrinkage"
to the target model after a PG.



Hope that helps,



Richard A. Black

Senior Engineer

Eaton Corporation

16900 Aberdeen Road

Laurinburg, NC. 28353

[dgschaefer]

Ah, I see what you are referring to now. That's actually a limitation
of the scale feature, not the publish or copy geom. It only scales dims
and the copy/publish geom has no dims of it's own so it is not effected
by scaling.

You can modify the geometry brought in by a copy/publish geoms in the
target model by solidifying, trimming, extending or merging the quilts,
trimming or extending curves, etc. Anything you could do to the
geometry if it were native to that model except modify its dimensions,
since those dimensions aren't actually in the target model, they're in
the source. Does that make sense?

Doug Schaefer