Cut by Lines

Cutting Triangulations Using an Existing Line

Use the Cut by Lines option to cut triangulations into two sections using an existing digitized cutting line. The cutting operation can be modified by either projecting the string and triangulation against a plane and/or by applying an angle to the cut.

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Instructions

Open the triangulation(s) that you want to cut.

Digitise the line that you want to use to cut the triangulation(s). (See Designing a Line and Digitising for more information about creating and digitising a line.)

Note:  The cutting line must not cross itself and must start and end outside the extent of the triangulation. For triangulations containing multiple shells, the cutting line must start and end outside the extent of the entire triangulation not just the extent of the shells being cut.

On the Model menu, point to Triangle Utility, and then click Cut by Lines.

Select the triangulation that you want to cut and the Cut Triangulations panel displays.

• Select the Project against plane check box if you want to project against a nominated plane. The plane on which to project the cutting line is defined through the Projection Plane panel, which displays when the Cut Triangulations panel has been completed. If this check box is not selected, then the cutting line will be projected upon the XY plane.
• Select the Cut triangulation on an angle check box to apply an angle to the cut and enter the angle in the Dip box.
• Select the Cut multiple triangulations check box to cut through multiple triangulations using a single line. A prefix and/or a suffix can be appended to the names of the resulting triangulations. For example, '<prefix><model name><suffix>.00t'. If both fields are left empty, then '_cut' will be appended to the end of the triangulation name.

Click OK.

Object	Click on the object(s) that you want to select. When you finish selecting objects, right-click to return to the Select By menu.
Group and Layer	Click on an object that is part of the group and layer combination that you want to use to select. When you are finished selecting combinations, right-click to return to the Select By menu.
Feature and Layer	Click on an object that is part of the feature and layer combination that you want to use to select. When you are finished selecting combinations, right-click to return to the Select By menu.
Layer	Click on an object in the layer that you want to use to select. When you are finished selecting layers, right-click to return to the Select By menu.
Group	Click on an object in the group that you want to use to select. When you are finished selecting groups, right-click to return to the Select By menu.
Feature	Click on an object that has the feature that you want to use to select. When you are finished selecting features, right-click to return to the Select By menu.
Name	Enter any combination of Layer, Group, Feature, and Object names that you want to select. To include all names for a particular attribute, enter an asterisk ( * ) for that attribute. If you want to exclude a layer, group, feature, or object by name, click the Exclude check box next to the name. Click OK to save selections, and then click Cancel to return to the Select By menu.
Templated Attributes	Use this option to display the Select by Attribute panel.
All	Click All to select all objects.

When you have selected all the objects that you want to use to cut the triangulation, right-click to return to the Select By menu.

Click Cancel to proceed with cutting the triangulation.

Figure 1: Figure 2 - The Original Triangulations

Figure 2: Figure 3 - The Resulting Triangulations

Results

The two sections are saved as new triangulations with the prefix and suffix that you specified on the Cut Triangulations panel.