CGAL - Insert edge in a face

nmya

0

I'm creating an application using qt creator which read .off files as CGAL::Linear_cell_complex_for_combinatorial_map and preview it I want to make operations on the read mesh such as removing edge and restore it .
I tried the following code but it doesn't do any action (insert/remove)

void MainWindow ::insertCell()
{
        dh1= lcc.darts().begin() ;
        dh2=lcc.darts().end();

   if (lcc.is_insertable_cell_1_in_cell_2( dh1, dh2) ){
        lcc.insert_cell_1_in_cell_2( dh1,dh2);
  }
      lcc.display_characteristics(std::cout) << ", valid=" <<
        lcc.is_valid() << std::endl;

 }


 void MainWindow ::removeCell()
 {    dh1= lcc.darts().begin() ;
     if( (lcc.is_removable<1>(dh1)) ){
    lcc.remove_cell<1>(dh1);
     }

     lcc.display_characteristics(std::cout) << ", valid="
                      << lcc.is_valid() << std::endl;
 
  }

any help please?

SGaist

Hi and welcome to devnet,

Might be a silly question but did you ensure that these two methods are being called ?

nmya

@SGaist
sure they are called and execute the last line of method by printing :
#Darts=16674, #0-cells=2775, #1-cells=8337, #2-cells=5558, #ccs=1, valid=1
which is the same output of printing characteristics before call insert of remove method

SGaist

Ok, then the other thing that you don't take into account is that you don't print anything in the case the lcc.is_insertable_cell_1_in_cell_2 and the lcc.is_removable<1>(dh1) methods return false.

So the lcc.insert_cell_1_in_cell_2 and and lcc.remove_cell<1>(dh1); might just not be called at all.

nmya

@SGaist said in CGAL - Insert edge in a face:

hing that you don't take into account is that you don't print anything in the ca

right
I traced the program , it's skipped lcc.insert_cell_1_in_cell_2 and print the last line - I don't know why it isn't insertable
but the remove method , it enter if statement scope and execute lcc.remove_cell<1>(dh1); whithout any removing action

SGaist

@nmya said in CGAL - Insert edge in a face:

I traced the program , it's skipped lcc.insert_cell_1_in_cell_2 and print the last line - I don't know why it isn't insertable

I don't know either. I never used that framework. It's up to you to find out why. Maybe your lcc object doesn't contain what is needed to allow insertion.

nmya

@SGaist thank you for help :)