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

[Raman Gupta]

Hi

I am not using STLPort stuff,as it is giving a lots of problems to me.I have commented or modified function which use STLPort.I have totally commented all serial functions also.Could this be the reason of not getting correct results.

 

Raman

lionel berenguier <address@hidden> wrote:

I don't know where is your problem, since It seems to work with your data.

 

This is my code::

 

 {
  CMatrix m1;
  
  CPolygon poly1;
  
  poly1.Vertices.push_back(CVector(0,8,0));
  poly1.Vertices.push_back(CVector(0,0,0));
  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));
  
  list<CPolygon> convexPolygons;
  
  nlinfo("%d", (uint)poly1.toConvexPolygons(convexPolygons,m1));

 

  nlinfo("");
  
  for(list<CPolygon>::iterator i = convexPolygons.begin() ; i != convexPolygons.end(); ++i)
  {
   vector<CVector> t1 = i->Vertices;
   
   for(int j = 0;j<t1.size();++j)
    nlinfo("%f,%f,%f", t1[j].x, t1[j].y, t1[j].z);
   nlinfo("");
  }
  
 }

 

And this is my result:

 

 

R:\code\test\test_3dyoyo\main.cpp(1551) : INF 1860: 1
R:\code\test\test_3dyoyo\main.cpp(1553) : INF 1860:
R:\code\test\test_3dyoyo\main.cpp(1560) : INF 1860: 4.000000,4.000000,0.000000
R:\code\test\test_3dyoyo\main.cpp(1560) : INF 1860: 4.000000,8.000000,0.000000
R:\code\test\test_3dyoyo\main.cpp(1560) : INF 1860: 0.000000,8.000000,0.000000
R:\code\test\test_3dyoyo\main.cpp(1560) : INF 1860: 0.000000,0.000000,0.000000
R:\code\test\test_3dyoyo\main.cpp(1561) : INF 1860:
R:\code\test\test_3dyoyo\main.cpp(1560) : INF 1860: 8.000000,4.000000,0.000000
R:\code\test\test_3dyoyo\main.cpp(1560) : INF 1860: 4.000000,4.000000,0.000000
R:\code\test\test_3dyoyo\main.cpp(1560) : INF 1860: 0.000000,0.000000,0.000000
R:\code\test\test_3dyoyo\main.cpp(1560) : INF 1860: 12.000000,0.000000,0.000000
R:\code\test\test_3dyoyo\main.cpp(1561) : INF 1860:
R:\code\test\test_3dyoyo\main.cpp(1560) : INF 1860: 12.000000,0.000000,0.000000
R:\code\test\test_3dyoyo\main.cpp(1560) : INF 1860: 12.000000,8.000000,0.000000
R:\code\test\test_3dyoyo\main.cpp(1560) : INF 1860: 8.000000,8.000000,0.000000
R:\code\test\test_3dyoyo\main.cpp(1560) : INF 1860: 8.000000,4.000000,0.000000

which sounds good to me.

 

Lionel.

----- Original Message -----

From: Raman Gupta

To: Developer's list for the NeL platform

Sent: Saturday, December 13, 2003 6:06 AM

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

Hi

 I have tried making last point != first point also but its not giving results.Input is --

0,8,0
0,0,0
12,0,0
12,8,0
8,8,0
8,4,0
4,4,0
4,8,0
Polygon is like --

_____          ________

|        |         |             |  (for input last point != first point)

|        |         |             |

|        |_____|             |

|                               |

|__________________|

 

 

Output is a list of 3 plygons--

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

 

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

 

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

The function -- Poly1.toConvexPolygons(convexPolygons,m1) is also returning  0(false).Please help.

 

Raman Gupta

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