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[Acecross <>]

I have tried the following approach to calculate the volume of my
alpha_shape_3:
double get_alpha_3_volume(const Alpha_shape3 &A,
Alpha_shape3::Classification_type c) {
        std::vector<Alpha_shape3::Cell> cells;
        A.get_alpha_shape_cells(std::back_inserter(cells), c);
        double volume = 0;
        for (std::vector<Alpha_shape3::Cell>::iterator it = cells.begin();
it != cells.end(); it++) {
                Point3 p1 = it->vertex(0)->point();
                Point3 p2 = it->vertex(1)->point();
                Point3 p3 = it->vertex(2)->point();
                Point3 p4 = it->vertex(3)->point();
                Alpha_shape3::Tetrahedron t(p1,p2,p3,p4);
                volume += t.volume();
        }
        return volume;
I constantly get a classification type error:
Severity Code Description Project File Line Suppression State
Error C2679 binary '=': no operator found which takes a right-hand operand
of type
'CGAL::internal::CC_iterator<CGAL::Compact_container&lt;CGAL::Alpha_shape_cell_base_3&lt;Gt,CGAL::Triangulation_cell_base_3&lt;GT,CGAL::Triangulation_ds_cell_base_3&lt;TDS2>>,ExactAlphaComparisonTag,Weighted_tag>,CGAL::Default,CGAL::Default,CGAL::Default>,false>'
(or there is no acceptable conversion) SebsAlphaPackage
c:\dev\cgal-4.11\include\cgal\alpha_shape_3.h 812
Does someone see my Error?
Thanking you in anticipation,

Acecross 



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