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One guide curve and one section curve swept:
Menu access: Shape | Other Shapes | Swept
Description:
A one guide curve and one section curve swept shape is defined as a surface swept by a curve named "section curve" moving along another curve named "guide curve".
General philosophy:
Click on the button ONE GUIDE AND ONE SECTION CURVE
Choose the method of sweeping: Normal, Vertical, Translated or On faces (cf. "method of sweeping" below).
Select the guide curve and choose its direction.
Select the vertical direction (if asked according to the sweeping method chosen).
Select the section curve or select on the POSITION SECTION CURVE button (cf. positioning).
If your section curve is built in place, check that it
is built at the origin of the guide
curve.
Available option(s):
Positioning:
The section curve is usually defined "in place"; id est. its position is the one corresponding to the initial sweeping coordinate system.
Nevertheless, it is also possible to choose the section curve in another coordinate system by pressing the POSITION SECTION CURVE button. In that case, the section curve will automatically be positioned in the initial sweeping coordinate system before starting the sweeping.
Method
of sweeping:
In order to define exactly the sweeping movement, the easiest is to consider the section curve fixed in coordinate system which origin moves along the guide curve. This coordinate system is called "sweeping coordinate system".
There are different ways to define the sweeping coordinate system, allowing getting several kind of geometry.
The following drop down
list allows you to choose the sweeping mode: 
.
To understand the principles of each sweeping mode, we need to give a precise description of the sweeping coordinate system. Its origin moving along the guide curve, you just have to precise its orientation
For this, we will use the following conventions:
The V vector represents the vertical direction.
The T vector is the tangent of the guide curve on the origin of the sweeping coordinate system.
X, Y and Z are the vectors defining the orientation of the sweeping coordinate system.
Variable swept:
Mode= CONSTANT or VARIABLE
With this option, it is possible to make a variable swept by setting a rotation and/or a scaling law to the section curve.
Intermediate
sections generation:
MAKE SECTION
The swept shape calculation is made using two steps: intermediate sections calculation, then creation of the template shape on these sections.
It is possible to generate intermediate sections when creating a swept or later with the "Modify" function.
This functionality is very useful in two cases:
The swept failed, usually due to an auto-intersection area: the generation of the sections allows you to visualize the problem spot.
The swept doesn't give the expected result: it is advisable to generate intermediate sections, modify the unsatisfactory ones and create a loft shape.
The option Curves=
VISIBLE or
HIDDEN
allows
you to keep visible or not the curves after the ruled shape is created.
When curves are closed, you can choose
the type of shape to create with the option Type=
SOLID or
SURFACE
TYPE . When you choose the solid type, the created shape will be
solid if possible. If not, not any message will appear.
Specific point(s):
The
guide curve can be open or closed, not necessarily planar, but
it must be tangentially continuous (no
angular point).
The
section curve can be open or closed, not necessarily planar and
can have angular points.
The resulting swept
surface must not have auto-intersection
area.
If the guide
curve is closed, you must select a minimum
of 4 section curves.
