Wireframe Multiple Section

To access this screen:

Create strings along the intersections of parallel, equally-spaced planes, based on either a selected wireframe or preselected wireframe triangle data.

Consider the following wireframe:

If represented as section strings, it would look like this:

These are, effectively, elevation contours, as the intersecting plane in this example is horizontal (zero azimuth, zero dip).

Note: This command supports flexible wireframe selection.

To create equally spaced sections strings at nominated intervals throughout a wireframe:

Load the open wireframe data to form sectional strings.
Define a section that represents the plane to use to create multiple sectional strings at fixed intervals. See Sheets/Project Data | 3D Folder | Sections.
Run the wireframe-section-multiple command.
Choose a loaded wireframe Object (the default is the current object) or selected wireframe triangle data (Selected triangles). You can select triangle data whilst the Project to Plane screen is displayed. See Selecting Wireframe Data.

Note: if choosing Selected triangles, section string data is produced at the intersection of selected wireframe data and the section intervals only.
Define the Plane Orientation of the 3D section plane:
- Horizontal—set the plane to be horizontal (i.e. both Azimuth and Inclination are 0 degrees).
- North-South—set the plane to a vertical North-South orientation (i.e. Azimuth is 90 degrees and Inclination is -90 degrees).
- East-West—set the plane to a vertical East-West orientation (i.e. Azimuth is 0 degrees and Inclination is -90 degrees).
- 3D Section—if any sections have been defined in the active 3D window, these section planes can be used to generate section string data at fixed intervals.
  
  Click to transfer the azimuth and dip of the section to the relevant fields. The Default Section option is listed alongside any custom sections that exist for your project.
- Azimuth—set the azimuth of the section plane manually.
  
  Note: this field is automatically overwritten if any of the preset options are selected.
- Inclination—set the inclination of the section plane manually.
  
  Note: this field is automatically overwritten if any of the preset options are selected.
Define the position of the initial section's center point using the Plane Reference Point values. Define X, Y and Z.
As an alternative to explicitly defining the plane orientation you can use one of the following automatic options:
- Use View Plane—fix the plane as the current view plane in the currently active 3D window.
- Pick Face—click to select a wireframe face in the 3D window.
  
  The Azimuth and Inclination update to reflect the orientation of the picked face and the Plane Reference Point (see above) updates to the coordinates of the selected point. This option fully defines the plane in 3D space.
Choose to output section strings as either a Single Object or Multiple New Objects:
- If Single Object is selected, output data either within the Current object, an existing wireframe object (pick it from the list) or a new object (type a new name).
- If Multiple New Objects is selected, enter a Prefix to be applied to all generated string objects (a string object is created for every unique intersection with the wireframe).
Optionally, define an additional field representing the Section Column to which each string entity relates.

You can either:
- enter a new column definition that will be added to the resulting string object, containing an automatically-incremented section index, relevant to each string entity, or;
- select an existing field description from the drop-down list (generated from the descriptions found in the original wireframe file) or;
- leave the field set to <none> so that no section index is output.
For example, in the image below, a single wireframe object is output and a new data column called REFSECT was added (via the first option, above). The resulting wireframe, if labelled using the REFSECT attribute shows how the string representing the intersection with the actual 3D section is labelled zero, whilst the sections above and below and labelled higher and lower respectively:
Click OK to generate output string data representing wireframe sections.