Extrapolate Triangulation
Extend a Triangulation through Single Facet Extrapolation
The Extrapolate Triangulation option to add a triangle to the edge of a triangulation by specifying an existing triangle and digitising a point. The new triangle consists of the outer edge of the existing triangle and edges joining the digitised point.
Figure 1: The Original Triangulation
Figure 2: After Extrapolation
Instructions
On the Model menu, point to Triangle Surface, and then click Extrapolate Triangulation to display the Extended points panel.
Save extended points in layer
Select this check box to save the points into a layer. You will need to specify the name of the layer and, optionally, a description.
Name
Select the layer that will be used to store the extended points.
To create a new layer, enter the layer name. The layer name:
- may contain up to 40 characters.
- must begin with an alphanumeric character [0-9] or [a-z].
- cannot include spaces.
- can include hyphens [ - ], plus signs [ + ], underscores [ _ ], periods/dots [. ].
- can include the special characters of ÁÂÃÀÇÉÊÍÓÔÕÚÜÑ that are used in the Spanish and Portuguese languages.
Description
Enter a description to further describe the contents of this layer. The description can be up to 80 alphanumeric characters and may include spaces. If a description is not entered, then a default description will be used instead. If the chosen layer already has an assigned description, the description displays when the layer is selected. Existing layer descriptions can be overwritten.
Click OK.
Select the triangulation. The triangulation model will be selected automatically if there is only one loaded onscreen.
Select a triangle. The chosen triangle must be located on a boundary edge.
Select the extension point. Confirm that the selected point is the correct point. The point doesn't need to exist prior to using this option. If it does, then consider using Snap to Objects or Snap to Points mode to ensure accurate selection.
The point is added to the triangulation and you can repeat the process, i.e. select another triangle and extension point.
Cancel when you have finished adding triangles.
