You can create a multi-sections volume by sweeping one or more
closed section curves along an automatically computed or user-defined spine. The volume
can be made to respect one or more guide curves.
You can create a multi-sections volume by sweeping one or more
closed section curves along defined guide curves.
From the Volume section of the action bar, click
Multi-sections
Volume.
Select one or more planar section curves.
The curves must be continuous in point.
Tip:
A
closing point can be selected for a closed section curves.
Multi-sections volume defined by three planar sections
Optional:
You can select a support surface for each of the extremity
section curve.
Optional:
In the
Continuity list, select the continuity type
for each support surface.
By default, the continuity is set to Tangent.
If needed, select one or more
guide curves.
Important:
Guide curves must intersect each section curve and
must be continuous in point.
The first guide curve will be a boundary of the
multi-sections volume if it intersects the first extremity of each
sections curve. Similarly, the last guide curve will be a boundary of
the multi-sections volume if it intersects the last extremity of each
section curve.
Multi-sections volume defined by two planar sections and two
guide curves
Note:
You can create a multi-sections volume by sweeping a section curve
along two guide curves intersecting each other at one extremity.
Optional:
You can select a support surface for extremity guide curves and
select the continuity type for each support surface.
In the
Spinetab,
select the
Spine check box to use a spine that is
automatically computed by the program or select a curve to impose that curve as
the spine.
Important:
The spine curve must be normal to each section plane
and must be continuous in tangency.
Click
OK to create the multi-sections volume.
The volume (identified as Multi-sections
Volume.xxx) is added to the tree.
Important:
The
Area lawtab is available only if you have the
Generative Shape Morphing (GSO) and Cast & Forged Part Design (CFO) licenses. For information on
the Area lawtab, see Use an Area Law in Working with
Multi-sections Surfaces.
Impose Tangency conditions
You can impose tangency on multi-sections volume.
Choose the way you want to impose tangency conditions:
You can make a multi-sections volume tangent to an adjacent volume
by selecting an end section that lies on the adjacent volume. In this case,
the guides must also be tangent to the volume. In Figure 2, a multi-sections
volume tangent to the existing volume has been created: Figure 1 Figure 2
Define Smooth Parameters
You can define smoothing parameters on the multi-section volumes.
In the Smooth parameters area, select:
the Angular correction check box to smooth
the lofting motion along the reference guide curves. This may be
necessary when small discontinuities are detected with regards to
the spine tangency or the reference guide curves' normal. The
smoothing is done for any discontinuity for which angular deviation
is smaller than 0.5 degree, and therefore helps generating better
quality for the resulting multi-sections volume.
the Deviation check box to smooth the lofting
motion by deviating from the guide curve(s).