CGAL users discussion list

[olivier stab <>]

Hello everybody,

I'm trying to convert a polyhedron_3 to a Nef_Polyhedron_3 ( because I 
would like to use regularized set operations). All faces of the 
polyhedron_3 are triangles but I had a problem during conversion : CGAL 
error: assertion violation! because a point of a face was not in the 
(computed) plan of its own face !!!
So I change the kernel from double to GMPQ to improve the accuracy. 
Unfortunately I have another message :

CGAL error: assertion violation!
Expr: pe_prev->facet()->plane().has_on(pv.point())
File: 
/u/unix/prm/stab/PACKAGE/CGAL-3.2.1/include/CGAL/Nef_3/polyhedron_3_to_nef_3.h 

Line: 164
Abort

It is still the same king of problem : a point of a face is not in the 
(computed) plan of the face !!! I have printed values :

Problem with point 0/1 39/2 10/1
Face 0/1 39/2 10/1
Face -3827017062975133/2251799813685248     
5467875649170735/281474976710656     2815835704516709/281474976710656
Face -7567584488753393/4503599627370496     
5406117907001047/281474976710656     2424423223689725/281474976710656
Problem with plane 
4098110741576261740136356745/19807040628566084398385987584 
-5957837625288232789804749470379/1267650600228229401496703205376     
943643646782002640772218915029/1267650600228229401496703205376 
7511259529487350353695022655679336824057253921/89202980794122492566142873090593446023921664 

CGAL error: assertion violation!

How can I improve the computing of the plane equation ??? I thought that 
GMP will have done it for me :-( .

Thanks.

--
---------------------------------------------------------
Stab Olivier
Ecole des Mines de Paris / GEOSCIENCES
35, rue saint honoré, 77305 Fontainebleau Cedex - France

Tel : +33 1 64 69 48 29          Fax : +33 1 64 69 47 11

Email : 

    Secr: +33 1 64 69 48 97
---------------------------------------------------------