On Jan 14, 6:25 pm, "Janes" <dja...@[EMAIL PROTECTED]
> wrote:
> <d...@[EMAIL PROTECTED]
> wrote in message
>
> news:a5c2cee1-2adf-480d-b0fd-766b4aba0e1a@[EMAIL PROTECTED]
>
>
>
> > On Jan 10, 10:59 pm, "Janes" <dja...@[EMAIL PROTECTED]
> wrote:
> >> "gluteous maximus equus" <n...@[EMAIL PROTECTED]
> wrote in
> >> messagenews:13odjt6b04ebc64@[EMAIL PROTECTED]
>
> >> >> that these curves are splines
>
> >> > They are unless the curve definition is two points. Then its
> >> > a line. That's do***ented in Help somewhere.
>
> >> >> im****t a point array, then create curves as described above.
> >> >> Is that what the Independent Geometry Feature does? Isn't
> >> >> that one of those things from REXX?
>
> >> > The Independent Geometry feature showed up in WF2 with the
> >> > addition of Scan-Tools to the FA license? It allows you to
> >> > copy or move standard model mode feature geometry into the
> >> > same environment used for Im****t Feature geometry manipulation.
>
> >> Okay, well I'll have to try this with some IBL created geometry and
see
> >> what
> >> use can be made of it. Any "user friendliness" built in? Im****t
Feature
> >> editing is horrendous! And probably not what the OP is looking for.
>
> >> David Janes
>
> > Thanks for the discussion. I'm not familar with the Independent
> > Geometry feature, and I'm not sure what you mean by Im****t Feature.
> > Can you tell me where to go in the menu so I try it out?
>
> > I've im****ted the IBL file as datum curves. Edit Definition allows
> > some manipulation of the curve definition, but as far as I can tell
> > does not allow end conditions to be specified.
>
> > My workaround has been to scrap the IBL's and just read in the spline
> > points as Datum Points Offset from CSYS. Create spline through points
> > with appropriate tangency end conditions.
>
> > Dave
>
> Could you use the IBL file for the point array definition? If not, where
did
> you get the points?
>
> David Janes
This is probably more than you want to know but here's the entire
scope of the project:
1) Started with an existing model with a complex surface built using
Style Tool.
2) Saved style curves used to construct the surface as an IGES.
3) In a new model: create datum curves from file, using IGES.
4) Edit Definition (Redefine), Edit File brings up the control points
for the IGES curves in IBL format.
5) I then manipulated points in the IBL file (using Excel and some VBA
macros) to modify the surface. Several iterations were processed and
analyzed using FEA to meet a target mass and stiffness for the
feature.
6) This is where I tried to read in the modified IBL files but could
not figure out how to set the tangency end conditions. The original
IGES file had tangent splines, and when im****ted in step 4, the spines
are tangent. However, if you read the un-manipulated IBL generated in
Step 4 the curves are no longer tangent.
7) My work around was just to strip the IBL formatting from the IBL
file to create a "point file". Then use the Datum Point offset CSYS
feature, copy paste the point data from the point file. Then define
curves, through points with specified tangency end constraints.
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