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[Stzpz <>]

Does anyone know how to solve this problem?

Thanks!

Stzpz

2011/3/14 Stzpz <>

Thanks! 

With this new code, the first call of remove_edges() works. But a precondition violation will appear when it is called for the second time. Is there something I missed?

Here is the information provided by CGAL. The attachment is the code.

CGAL error: precondition violation!

_expression_ : (_are_equal (he2->vertex(), cv, ARR_MIN_END) && _are_equal (he3->ve

rtex(), cv, ARR_MAX_END)) || (_are_equal (he3->vertex(), cv, ARR_MIN_END) && _ar

e_equal (he2->vertex(), cv, ARR_MAX_END))

File       : D:\CGAL-3.7\include\CGAL/Arrangement_2/Arrangement_on_surface_2_imp

l.h

Line       : 1788

Explanation: The endpoints of the merged curve must match the end vertices.

Thanks again!

Stzpz

2011/3/14 Sebastien Loriot (GeometryFactory) <sloriot.ml@gmail.com>

stzpz wrote:

I am trying to remove some edges from the Bezier arrangement using the
attached code ( http://cgal-discuss.949826.n4.nabble.com/file/n3353253/test1.rar test1.rar ), but it won't compile. Could anyone tell me how to solve it?

Thanks so much!

Stzpz



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Sent from the cgal-discuss mailing list archive at Nabble.com.

try with this:

Arrangement_2::Edge_iterator tmp_it=iter;
++iter;
remove_edge(arr, tmp_it);

I know this is not compact but Edge_iterator inherits from a type I_Filtered_iterator where operator++(int) is defined.
Thus iter++ is not an Edge_iterator but its base class.

We will try to correct this directly in CGAL.

S.


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