SECTS                                                              Menu: PEDIT
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Sections a selected group of solid entities on a plane.

        1. * (CHAR) option: plane: o-orthogonal, d-diagonal, f-free <o>
     if option `o' is selected:
        2. * (CHAR) axis of section (x,y or z)
        3. * (CHAR) define the section by: v-value, p-point <p>
     if option `p' is selected:
        4. * (POINT) point on section plane
     if option `v' is selected:
        4. * (POINT) value on axis
        5.   (POINT) specify location within part to be kept
     if option `d' is selected:
        2. * (POINT) first point on section plane
        3. * (POINT) second point on section plane
        4. * (POINT) pick point on part to be kept
     if option `f' is selected:
        2. * (POINT) first point on section plane
        3. * (POINT) second point on section plane
        4. * (POINT) third point on section plane
        5. * (POINT) pick point on part to be kept
     for all options:
        6. * (Y/N) keep the result ? <y>

Description:
This command sections all selected solid entities along a plane:
1. orthogonally at a specified coordinate value (option `o', the default), or
2. perpendicular to an axial plane (xy, xz, or yz) (option `d'), or
3. by a free plane defined by three points (option `f').
For option o:
Specify an axis and select one of two further options: `p' - to point to the
position of the section (the default)  or `v' - state a coordinate value on
the axis selected. The section plane will be normal to the axis at the
specified value. Then enter another coordinate value on the same axis to
indicate which side of the section plane is to be kept.
For option  `d':
Pick two points on one of the axial planes (xy, yz or xz). The section will be
cut through the two points perpendicular to the plane on which the points are
located. Pick another point to indicate the side of the section that is to be
retained.
For option `f':
Pick three points to define a free plane and a fourth point to indicate the
side to be kept.
The sectioned entities will be displayed temporarily. You are then prompted to
keep or regret the result. Entering `y' causes the temporary entities to
become permanent.
The result of this process is a group of complex solid entities (data type 9).
A wall sectioned by this command becomes a complex wall and continues to
posses the characteristics of a wall but the commands \chaw, \chaa, \fixw, and
\fixa have no effect. This command sections only walls and solids. You may not
cut lines, arcs, texts, or dimension lines.

        Example: \sects o z v 1 0 y

Result:  The selected entities are sectioned along a plane normal to the z
axis (parallel to the xy plane) at the point where z=1. The parts having a z
value larger than1 disappears, leaving only the parts where z is less than 1.
