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This task shows you how to restore
the limits of a surface or a curve when it has been split using:
- Break Surface or Curve
(FreeStyle workbench)
- Split
(Generative Shape Design and Wireframe & Surface
workbenches).
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Open the
FreeStyle_06.CATPart document. |
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Click Untrim Surface or Curve
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The Untrim dialog box appears. |
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The Untrim dialog box has
the following options:
Selection:
When you select the elements to be untrimmed, the selected
elements will be shown in the multi-selection field. The
selections allowed are surface, curve and edges of surface.
Create Curves:
You can extract the boundary of the selected elements
using this option.
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If “Create Curves”
push button is ON, all the boundary edges of selected
elements will be extracted as datum curves.
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If “Create Curves”
push button is OFF, datum curves will not be created.
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All the
datum curves will be added in the specification tree as
Curve.XXX.
Create Extract:
GSD Extract command is available by contextual menu on
multi-selection field in untrim dialog box. You can create GSD Extract
of the selected edges. The result of GSD extract will be added in
multi-selection field and will be input for the untrim feature. The GSD
Extract feature will be aggregated under untrim feature in specification
tree. Result of extract feature will be used to identify
whether you are willing to perform the untrim of entire outer loop or
the partial outer loop. If the result of the extract feature is:
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Face: then Untrim will
be performed on entire face.
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Part of inner loop:
Untrim will be performed on the entire inner loop.
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Entire Inner loop:
Untrim will be performed on the entire inner loop.
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Part of outer loop:
Untrim will be performed on the part of the outer loop
if possible otherwise entire outer loop will be used for
untrim operation.
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Entire outer loop:
Untrim will be performed on the entire outer loop.
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Multi domain boundary
(Boundary of faces containing holes): Untrim will be
performed based on the corresponding type of selection.
(For example, If actual input of extract has multiple
inner loops and one outer loop and the result of extract
contained only one of the inner loop and the outer loop
then the untrim will be performed like local untrim of
selected inner loop + local untrim of outer loop).
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The Dashboard options that you can use are as
follows:
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While creating new Untrim feature:
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You can either directly select the
surface to be untrimmed.
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Or you can select
the edges of the surface interactively.
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If you select an
edge of the surface which is part of the inner loop the untrim will be
performed on the entire inner loop.
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If you select an
edge of the surface which is part of the outer loop the untrim will be
performed on the part of the outer loop only if it is possible to do so.
Otherwise untrim will be performed on the entire outer loop.
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The contextually created GSD Extract feature
will not be directly used as input of Untrim
feature. The input of GSD extract feature will be used
as the input of untrim feature. For example if input of extract feature is a
multi-cell surface then the input of untrim feature will also be the same multi-cell
surface. It is not possible to use contextual GSD
Extract command in the Untrim panel to extract a
solid face or a face of multi-cell surface. In
this case Extract the face before entering in
the Untrim command.
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In case of editing the existing untrim
feature:
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You will not be allowed to select
multiple elements.
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In case of multiple selections only
last selection will be considered for the
creation of the untrim.
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When the selection is changed then
all earlier extract features (aggregated under
untrim) will be removed and then you have
to manage creation of new extract if required.
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Also please note that in case of edit
mode if you create multiple extract features
only the last created extract feature will be
kept and the other features will be removed.
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In case of editing the existing extract
feature under untrim feature:
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The local undo/redo support for the selection
is provided when you are working with untrim command.
You can decide to create the curves for the
selection he has done to create untrim by enabling the option
Create
Curves on the dialog. In this case the datum curves will be created for
the selection done by you except for extract feature. When entire
face is selected as input, all the edges of the face will be extracted. |
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Select the surface which limits should be restored.
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The Untrim dialog box is updated
accordingly. |
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Click OK in the dialog box.
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A progression bar
is displayed, while the surface is restored. It automatically disappears once the operation is complete (progression at
100%). |
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The initial surface is automatically restored.
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If the surface is extrapolated by other operations such as trim
or split, before using the Untrim Surface or Curve
,
it cannot be restored to its original shape. |
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The restored surface
or curve is identified as Surface Untrim.xxx or Curve Untrim.xxx. |
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You can perform a local
untrim on faces. Three modes of selection are available:
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- If the surface has been trimmed several times,
it is the initial surface which is restored. To partially untrim the
surface, you need to use the Undo command right after the
trim.
- If the surface to be restored is closed (in
the case of a cylinder) or infinite (in the case of an extrude), the
limits of the untrim feature will be the bounding boxes of the initial
surface. Therefore, the initial surface and the untrim surface may be
identical.
- You can individually select a vertex or a boundary from the restored
surface or curve.
- Multi-selection is
available and allows to create several untrim features in one step. All
untrim features will appear in the specification tree.
- The
keep original
capability is available from the Tools Dashboard.
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