Nulling – 12D Wiki

Null Triangles by Angle/Length (Seed)

This option is used to Null (remove) Triangles by Angle and Length with a Seed Point. The seed point is the starting point for the nulling by angle and length, which is particularly useful for nulling internal areas of a tin. Continue down the page to see the Null Triangles by Angle and Length (Seed) [...]

Null Triangles by Angle/Length

This option is used to Null (remove) Triangles by Angle and Length. Continue down the page to see the Null Triangles by Angle and Length option. To Null Triangles by Angle and Length, Use: Tins => Null => by Angle/Length Firstly select the Tin to null the triangles from the drop down list, in this [...]

Null Triangles by Length

This option is used to Null (remove) Triangles by length. Continue down the page to see the Null Triangles by Length option. To Null Triangles by Length, Use: Tins => Null => by Length Firstly select the Tin to null the triangles from the drop down list, in this example we have selected ‘survey’. Type [...]

Null Triangles – Outside of a Polygon

This option is used to Null (remove) any Triangle whose centroid is outside a selected polygon. Continue down the page to see the Null Triangles Outside Polygon options. To Null Triangles Outside Polygon, Use: Tins => Null => Null After a TIN has been created, it can be edited at any time and one of [...]

Tin Boundary

This tool is used to create a Boundary string/s around a Tin, to ensure that the unacceptable triangles around the edges of the tin that have been nulled will be saved if the tin is retriangulated. The video below will show how to create a Tin Boundary string/s and save it to the Tin for [...]

Null by Strings

This TIN Null by Strings option is used to Null (remove) Triangles in a triangulation. The video below will show how to use the TIN Null by Strings option. Or continue down the page to see the TIN Null by Strings options. https://www.youtube.com/watch?v=0j7b-vCJI4Y To Null Triangles by Strings, Use: Tins => Null => by Strings [...]

Null by Point

This TIN Null by Point option is used to Null (remove) or Reset (turn on) the Triangles in a triangulation. The video below will show how to use the TIN Null by Point option. Or continue down the page to see the TIN Null by Point options. https://www.youtube.com/watch?v=zF7J5WSBr74 To Null Triangles by Points, Use: Tins [...]

Null by Polygons

This option is used to Null (remove) Triangles from a TIN by selecting a single polygon or a model of polygons. Continue down the page to see the Null by Polygon options. To Null Triangles by Polygons, Use: Tins => Null => by Polygons After a TIN has been created, it can be edited at [...]

Triangulate Data

This option is used to create a TIN (Triangulated Irregular Network) of a data set. The video below will show how to create a TIN, Triangulate a data set. Or continue down the page to see the Triangulate Data create options. A "Triangulated Irregular Network" (TIN) is an accurate method of representing a 3D surface. [...]