Wed, 07/09/2008 - 15:26
Forums:
How can I give an id to a point in OpenCascade?
I need to calculate the number of unique points in a 3D shape,so i should give id numbers to points?
How can I handle it?
Collaborative development portal
Fri, 07/11/2008 - 15:22
#include
includes this library first.
then under the include files add this statement:
static TopTools_DataMapOfShapeInteger _map_shape_int;
For example,you can give ID manually to the vertexes such that:
int vertex_id = 0;
TopExp_Explorer ex,ex1;
TopoDS_Vertex vertex;
for (ex.Init(cubian, TopAbs_FACE);ex.More();ex.Next())
{
for(ex1.Init(ex.Current(),TopAbs_VERTEX);ex1.More();ex1.Next())
{
vertex = TopoDS::Vertex(ex1.Current());
if(!_map_shape_int.IsBound(vertex))
{
_map_shape_int.Bind(vertex,vertex_id);
vertex_id++;
}
}
}
Sat, 07/12/2008 - 10:05
HI;
this method return the number of vertex in the face not ID;
//***for example
when you try to use this method to get the id of vertex in occ_face
"plane" , you get "ID=4" the number of occ_vertex not "ID: 1, 2, 3, 4"
how can 'i retrive the vertex by ID.
A++
Sat, 07/12/2008 - 14:21
Hi HICHEM,
The code sample that I sent is just an example,and the code counts the number of vertexes in all faces,but does not include the common vertexes.
For example,I have done it for a cube and count the number of vertexes,and it counts 8.Because,the cube has 8 unique vertexes.
You asked how you could retrive the vertex by ID.
For example;
#include
// declare a class
static TopTools_DataMapOfIntegerShape _map_int_shape;
...
TopoDS_Vertex vertex = TopoDS::Vertex(_map_int_shape.Find(vertex_id));
Sat, 07/12/2008 - 16:25
hi;
when i' try to use this method, i'get evry time the same ID , i'don't understand why?
//***
in my class OCC_FONCTION1 i'use this method :
void OCC_FONCTION1::SetID(TopoDS_Face face)
{
TopTools_IndexedMapOfShape faces;
TopExp::MapShapes(ashape,TopAbs_FACE, faces);
int nb_face_occ=faces.Extent();
for(int k=1; k<=nb_face_occ;++k)
{
face=TopoDS::Face(faces.FindKey(k));
id_face=faces.FindIndex(face);
if(!map_integer.IsBound(face))
{
map_integer.Bind(face, id_face);
id_face++;
}
}
}
// to get id i'use this method
int OCC_FONCTION1::GetID(TopoDS_Face face)
{
return id_face;
}
when i'try to get the face from id or dump him from id , i'get the same face what's the bug??
think you in advanced ...
A++