Re: [Nel] How to use NLMISC::CPolygon::toConvexPolygons function

[Raman Gupta]

Hi

My concave polygon is

12,0,0
12,8,0
8,8,0
8,4,0
4,4,0
4,8,0
0,8,0
0,0,0
12,0,0

 

and the  result in list<CPolygon> convexPolygons , i.e list of convex polygons into which original polygon is broken , that i am getting is --

12,8,0
8,8,0
8,4,0 

 

4,4,0
4,8,0
0,8,0
0,0,0

which are not suitable. Please kindly tell how to get proper results.This is what i am doing :--

 

void main()

{

CMatrix m1;

CPolygon poly1;

poly1.Vertices.push_back(CVector(12,0,0));

poly1.Vertices.push_back(CVector(12,8,0));

poly1.Vertices.push_back(CVector(8,8,0));

poly1.Vertices.push_back(CVector(8,4,0));

poly1.Vertices.push_back(CVector(4,4,0));

poly1.Vertices.push_back(CVector(4,8,0));

poly1.Vertices.push_back(CVector(0,8,0));

poly1.Vertices.push_back(CVector(0,0,0));

poly1.Vertices.push_back(CVector(12,0,0));

list<CPolygon> convexPolygons;

poly1.toConvexPolygons(convexPolygons,m1)<<endl;

for(list<CPolygon>::iterator i = convexPolygons.begin() ; i != convexPolygons.end(); ++i){

vector<CVector> t1 = i->Vertices;

for(int j = 0;j<t1.size();++j)

           cout<<t1[j].x<<','<<t1[j].y<<','<<t1[j].z<<endl;

cout<<endl;

}

}

---

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