Problem creating a tin file – Different results using Select Series 2 vs Select Series 3

Question

Geopak_Support_2015_01_19.zip I have a dgn containing graphic triangles. 
 When I create a new tin file using &ldquo;Extract Graphic Triangles&rdquo; I get different results when using Select Series 2 vs Select Series 3 Geopak. 
 SS2 produces the correct resulting tin file. 
 I have attached a data set. 
 The data set contains a DGN file with graphic triangles. 
 Also SS2 and SS3 dat file and in files 
 Please compare the graphic triangles from the two tin files in the area circled on level &ldquo;Problem_Area&rdquo;

Beebe Ray · Accepted Answer

I did verify that the results were different in SS3, some of the graphic triangles were not being extracted as they were in SS2. In your particular case you can extract the triangles as breaklines in SS3 and get the same result and all triangles come in so that the TIN in SS3 and SS2 match.

Beebe Ray · Answer

A soft Break Line is a break line but if it happens to cross another break line then is will be ignored so as to not affect the triangulation, a graphic break line is a soft break line that will not be stored in the terrain model, and a break line is what it has always been, a line where triangles will not cross over.