Evaluate > Cross Section
 
 
 

Creates cross section geometry on selected surfaces or meshes.

Cross Section Control

Section Type

Axis Aligned – The cross sections are perpendicular to the X, Y, and Z axes and are evenly spaced.

Picked Reference – The cross sections are created at the intersection between the geometry and selected section data or construction planes.

Radial – The cross-sections are created based on a driving curve you specify. Points, equally spaced by arc length, are placed on the curve to correspond to a given number of sections. A plane is then defined perpendicular to the tangent of the curve at each of these points. The cross-sections are created where the planes intersect the geometry.

NoteThe driving curve can be a free curve, a curve-on-surface, or a surface edge or isoparm. If all curves are tangent continuous, more than one driving curve can be selected.

NURBS from Visual – Visual cross-sections, created from the Control Panel, are converted into NURBS curves.

Construction History

Turn this option on to save the construction history of the cross sections. This way, the cross sections update when you modify the underlying geometry.

Create Section Data

If this option is not checked, NURBS cross sections are created.

If it is checked, the NURBS are rebuilt as section data, according to the Section Merge Tolerance value. As well, the cross sections that are position (G0) continuous, and belong to the same intersecting plane, are merged to form a single section.

NoteIf Create Section Data is turned on, Construction History cannot be saved (the Construction History option is grayed).
Sort Sections

If this option is checked on, the X, Y, and Z sections are placed in separate layers and identified with different colors. This option is only available when Create Section Data is turned on.

Section Merge Tolerance

Fitting tolerance used to rebuild NURBS curves as section data. This option is only available when Create Section Data is turned on.

Axis Aligned Options

These options appear only when Section Type is Axis Aligned.

X/Y/Z

Turn on or off to view various combinations of cross sections perpendicular to the X, Y and Z axes.

Auto Range

If this option is checked, we use the bounding box of the picked objects to determine where to compute the cross sections, independently of the position of the object in space.

Start/End

These options only appear when Auto Range is off.

Enter the 3D coordinates of two corners of a bounding box. The cross sections are calculated for the region of the selected object(s) that intersect this box.

If Start equals End, a single cross section line is created.

Step

The spacing between cross section lines along the X, Y, and Z axes.

Radial Options

These options appear only when Section Type is Radial.

Number of Planes

Number of planes to define along the driving curve(s). The cross-sections are created where the planes intersect the geometry.

Chain Select

If this option is checked, selecting a driving curve also selects all other curves that are tangent continuous with it.

See Also