我想在这种方法中以某种迭代方式为向量p-> vertexlist赋值,并且当j = 3和i = 2时(在for迭代中)一直存在内存问题。
void py_tetgenio::set_facets(bp::list python_facets) {
this->numberoffacets = bp::len(python_facets);
this->facetlist = new tetgenio::facet[this->numberoffacets];
this->facetmarkerlist = new int[this->numberoffacets];
for (int i = 0; i < this->numberoffacets; i++) {
//iterar por sobre la lista agregando cada uno de los
//identificadores a cada uno de los facets
bp::list facet = bp::extract<bp::list>(python_facets[i]);
tetgenio::facet *f = &this->facetlist[i];
f->numberofpolygons = 1;
f->polygonlist = new tetgenio::polygon[f->numberofpolygons];
f->numberofholes = 0;
f->holelist = NULL;
tetgenio::polygon *p = &f->polygonlist[i];
//iterar por sobre la lista de los id de los nodos
//almacenados en la lista que representa al facets
p->numberofvertices = bp::len(facet);
p->vertexlist = new int[p->numberofvertices];
for (int j = 0; j < p->numberofvertices; j++) {
int aux = bp::extract<int>(facet[j]);
p->vertexlist[j] = aux; // SIGSEV: Segmentation Fault!!! when j=3
// and i = 2
}
this->facetmarkerlist[i] = 1;
}
} //end set_facets
这是一个Mysterious
最佳答案
注意:我们被告知i
为2。
f->numberofpolygons = 1;
f->polygonlist = new tetgenio::polygon[f->numberofpolygons];
现在,
f->polygonlist
指向大小为1
的数组。// Two irrelevant statements skipped
tetgenio::polygon *p = &f->polygonlist[i];
现在,
p
是i == 2
中第三个(f->polygonlist
)多边形的地址。哦,但是f->polygonlist
指向大小为1
的数组。