CGAL users discussion list

[Thomas Holzmann <>]

Hi,

I'm having a (non-constrianed) triangulation and am dividing cells in 
several new ones. Therefore, I'm having a mapping from old to new cells:

map<Cell_handle, vector<Cell_handle> > oldToNewCells;

Now I want to check if a cell was already procesed:

vector<Cell_handle> cellAlreadyProcessed;
try{
    cellAlreadyProcessed = oldToNewCells.at(cell);
}
catch(out_of_range){}

This generally works. However, when I compile with -O0, I get this error 
in case the cell is not in the mapping:

CGAL ERROR: precondition violation!
Expr: ( i >= 0 && i < 4 ) && ( j >= 0 && j < 4 ) && ( i != j )
File: /home/holzi/tools/CGAL-4.9/include/CGAL/Triangulation_utils_3.h
Line: 67

Could someone explain to me, why this error happens and no out_of_range 
exception is thrown?

Thanks!

Thomas


--
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Dipl.-Ing. Thomas Holzmann
TU Graz - Institut fuer Maschinelles Sehen und Darstellen
Graz University of Technology - Institute for Computer Graphics & Vision
Inffeldgasse 16/II, 8010 Graz, Austria

http://www.icg.tugraz.at/
phone: +43 316 873 5091
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