To Set Up Reference Points
1. Select a surface.
2. Click > > 
Reference Point Setup. The Reference Points dialog box opens.
Reference Point Setup. The Reference Points dialog box opens.3. Click Add Ref Points to add references.
4. To specify reference points, select an option from the list.
◦ Raw Data Set—Selects points from a raw data set. If you select Raw Data Set, the SCAN FILTER menu appears. Select one of the following:
▪ CrvChainFltr—Uses only those scan points that are enclosed within the region bounded by an open or closed chain of curves. Use the CHAIN menu to select curves separating scan points, and then select a scan set.
▪ SrfProjFltr—Uses only those scan points that project within the boundaries of the surface. Select a scan set to project onto the surface.
▪ No Fltr—Selects an entire scan set.
◦ Raw Data Points—Selects individual points from a raw data set.
◦ Single Point—Selects datum points.
◦ Datum Point Array—Selects an entire datum point array.
◦ Facet Vertices—Selects vertices of a faceted model.
◦ Facet Vertices Inside Curve—Selects facet vertices inside a selected closed loop of curves.
5. To remove reference points, click Rmv Ref Points and select an option from the list. The available options are:
◦ All
◦ Scan Curve Set
◦ Scan Curve Points
◦ Single Point
◦ Datum Point Array
◦ By Deviation Range
6. Click 
.
. | If the polynomial surface is created from curves on facets so that they form a closed loop, Restyle assigns all the facet vertices lying inside this loop to the newly created surface by default. |