CGAL users discussion list

[Matthieu Chavent <>]

Thank you Nico. It is better now.  Than k you for your program: it is 
very interesting.

Regards,
     Matthieu

Nico Kruithof a écrit :
> Hi Matthieu,
>
> By default the CGAL skin surface mesher grows the input balls by
> 1/shrink_factor. Then the skin surface will wrap around the input balls
> instead of shrunk versions of the input balls. However, by growing the
> balls you might change the topology of their union and hence of their
> skin surface. You can disable the growing of the balls by setting
> grow_balls to false in
>
> template <class WP_iterator, class Polyhedron_3>   void  
> make_skin_surface_mesh_3 ( 
> Polyhedron_3 &p,
> WP_iterator begin,
> WP_iterator end,
> FT shrink_factor=.5,
> int nSubdiv=0,
> bool grow_balls = true)
>
>
> Hope this solves your problem,
> Nico
>
> On Tue, 2007-10-30 at 17:34 +0100, Matthieu Chavent wrote:
>   
> > Sorry, I used not exactly the same file for the skin surface mesher: I 
> > join the good one with this mail. In fact, for cheng and chew program I 
> > have to pass the square of the weight (in the gramicidinA.tet file with 
> > the previous mail) and not in the skin surface mesher in CGAL. But, the 
> > questions stay the same...
> >
> > Thank you in advance!!
> >
> >      Matthieu Chavent 
> >
> > Matthieu Chavent a écrit :
> >     
> > > Good evening,
> > >
> > > I use the skin surface mesher and I compare it with a Cheng and Chew 
> > > program that normally creates the same skin surface.. But When I use 
> > > the same data set the two surfaces are not exactly the same. Could I 
> > > have and explanation, please? And the two surface represent clearly 
> > > the skin surface? In particular, the hole in the center of the 
> > > molecule exists or not?
> > >
> > > Thank you in advance!!
> > >
> > > Regards,
> > >
> > >      Matthieu Chavent
> > >
> > > PS: I joined the file.
> > >
> > > ------------------------------------------------------------------------
> > >
> > > ------------------------------------------------------------------------
> > >
> > >       
> > --
> >
> >
> > ---------------------------
> >
> > Matthieu Chavent
> > LORIA
> > PhD student
> >
> > tel: ++33(0)3-54-95-86-05
> >
> > ---------------------------
> >
> > plain text document attachment (gramicidinA2.tet)
> >   -2.330  -0.205   1.496  1.55
> >   -3.501   0.435   2.070  1.70
> >   -3.595   0.079   3.555  1.70
> >   -3.911  -1.055   3.906  1.52
> >   -4.752   0.042   1.281  1.70
> >   -5.974   0.826   1.764  1.70
> >   -4.535   0.232  -0.221  1.70
> >   -3.315   1.072   4.387  1.55
> >   -3.364   0.879   5.826  1.70
> >   -2.503   1.917   6.549  1.70
> >   -3.009   2.947   6.992  1.52
> >   -1.218   1.610   6.645  1.55
> >   -0.282   2.504   7.305  1.70
> >    1.118   2.286   6.729  1.70
> >    1.488   1.161   6.395  1.52
> >   -0.333   2.271   8.817  1.70
> >    1.860   3.379   6.631  1.55
> >    3.212   3.322   6.101  1.70
> >    3.344   4.316   4.945  1.70
> >    3.076   5.504   5.109  1.52
> >    4.235   3.539   7.217  1.70
> >    5.653   3.290   6.701  1.70
> >    6.367   4.609   6.398  1.70
> >    6.446   2.419   7.676  1.70
> >    3.758   3.791   3.801  1.55
> >    3.929   4.617   2.617  1.70
> >    2.939   4.169   1.540  1.70
> >    2.972   3.022   1.100  1.52
> >    5.381   4.534   2.143  1.70
> >    2.080   5.099   1.149  1.55
> >    1.082   4.815   0.132  1.70
> >   -0.248   5.456   0.535  1.70
> >   -0.349   6.677   0.629  1.52
> >    1.580   5.284  -1.237  1.70
> >    2.863   4.551  -1.635  1.70
> >    0.496   5.113  -2.303  1.70
> >   -1.235   4.601   0.764  1.55
> >   -2.554   5.068   1.156  1.70
> >   -2.807   4.698   2.618  1.70
> >   -2.463   3.600   3.053  1.52
> >   -3.612   4.505   0.205  1.70
> >   -4.962   5.192   0.419  1.70
> >   -3.159   4.625  -1.252  1.70
> >   -3.408   5.635   3.337  1.55
> >   -3.713   5.421   4.742  1.70
> >   -3.197   6.608   5.557  1.70
> >   -3.535   7.756   5.271  1.52
> >   -5.212   5.179   4.922  1.70
> >   -5.618   3.813   4.366  1.70
> >   -5.618   5.317   6.390  1.70
> >   -2.386   6.292   6.556  1.55
> >   -1.820   7.318   7.415  1.70
> >   -0.305   7.108   7.467  1.70
> >    0.164   5.987   7.660  1.52
> >   -2.475   7.298   8.797  1.70
> >   -1.741   8.137   9.845  1.70
> >   -1.921   9.432  10.140  1.70
> >   -0.709   7.727  10.733  1.70
> >   -1.073   9.845  11.147  1.55
> >   -0.304   8.748  11.518  1.70
> >   -0.119   6.453  10.860  1.70
> >    0.697   8.654  12.492  1.70
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> >    1.299   7.409  12.641  1.70
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> >    1.871   8.154   7.318  1.70
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> >    2.400  10.354   6.513  1.52
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> >    3.913   8.530   8.734  1.70
> >    4.417   9.056  10.080  1.70
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> >    2.921   8.593   5.193  1.55
> >    3.484   9.412   4.133  1.70
> >    2.866   8.961   2.807  1.70
> >    2.395   7.830   2.692  1.52
> >    5.013   9.339   4.136  1.70
> >    5.658   9.862   5.421  1.70
> >    5.406  11.012   6.061  1.70
> >    6.662   9.244   6.214  1.70
> >    6.186  11.143   7.192  1.55
> >    6.985  10.008   7.279  1.70
> >    7.302   8.004   6.006  1.70
> >    7.941   9.666   8.243  1.70
> >    8.258   7.662   6.969  1.70
> >    8.590   8.449   8.066  1.70
> >    2.890   9.867   1.842  1.55
> >    2.338   9.576   0.529  1.70
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> >    1.135  11.556  -0.100  1.52
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> >    4.677   9.029  -0.214  1.70
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> >    5.868   9.575  -1.005  1.70
> >   -0.062   9.778   0.623  1.55
> >   -1.346  10.442   0.474  1.70
> >   -2.250   9.984   1.621  1.70
> >   -2.045   8.913   2.189  1.52
> >   -1.947  10.169  -0.906  1.70
> >   -1.155  10.783  -2.061  1.70
> >   -1.276  12.011  -2.584  1.70
> >   -0.120  10.186  -2.832  1.70
> >   -0.387  12.210  -3.621  1.55
> >    0.346  11.038  -3.770  1.70
> >    0.421   8.889  -2.714  1.70
> >    1.365  10.737  -4.682  1.70
> >    1.441   8.589  -3.625  1.70
> >    1.920   9.466  -4.591  1.70
> >   -3.233  10.819   1.926  1.55
> >   -4.168  10.515   2.996  1.70
> >   -3.957  11.496   4.150  1.70
> >   -4.386  12.646   4.077  1.52
> >   -5.603  10.493   2.462  1.70
> >   -5.836   9.251   1.600  1.70
> >   -6.394   8.100   2.440  1.70
> >   -6.731   9.575   0.402  1.70
> >   -3.294  11.006   5.187  1.55
> >   -3.020  11.827   6.354  1.70
> >   -1.606  11.501   6.840  1.70
> >   -1.000  10.529   6.391  1.52
> >   -4.086  11.619   7.433  1.70
> >   -5.514  11.885   6.956  1.70
> >   -6.165  13.056   6.907  1.70
> >   -6.463  10.949   6.459  1.70
> >   -7.445  12.904   6.417  1.55
> >   -7.624  11.555   6.134  1.70
> >   -6.312   9.557   6.289  1.70
> >   -8.748  10.897   5.619  1.70
> >   -7.435   8.900   5.774  1.70
> >   -8.631   9.524   5.439  1.70
> >    0.210  12.145   8.302  1.70
> >   -1.122  12.332   7.751  1.55
> >    1.207  13.019   7.538  1.70
> >    1.257  12.684   6.153  1.52
> >    2.276   0.179   1.481  1.55
> >    3.451  -0.461   2.047  1.70
> >    3.555  -0.104   3.532  1.70
> >    3.873   1.031   3.880  1.52
> >    4.697  -0.068   1.250  1.70
> >    5.922  -0.852   1.725  1.70
> >    4.470  -0.260  -0.250  1.70
> >    3.281  -1.096   4.366  1.55
> >    3.339  -0.902   5.805  1.70
> >    2.482  -1.940   6.534  1.70
> >    2.991  -2.970   6.974  1.52
> >    1.198  -1.633   6.638  1.55
> >    0.267  -2.527   7.305  1.70
> >   -1.138  -2.309   6.738  1.70
> >   -1.509  -1.185   6.406  1.52
> >    0.327  -2.293   8.816  1.70
> >   -1.880  -3.402   6.645  1.55
> >   -3.235  -3.345   6.124  1.70
> >   -3.375  -4.340   4.970  1.70
> >   -3.106  -5.528   5.133  1.52
> >   -4.251  -3.562   7.247  1.70
> >   -5.672  -3.313   6.740  1.70
> >   -6.388  -4.632   6.443  1.70
> >   -6.459  -2.441   7.720  1.70
> >   -3.796  -3.816   3.828  1.55
> >   -3.975  -4.642   2.646  1.70
> >   -2.992  -4.195   1.562  1.70
> >   -3.028  -3.048   1.121  1.52
> >   -5.431  -4.560   2.181  1.70
> >   -2.136  -5.126   1.166  1.55
> >   -1.144  -4.842   0.142  1.70
> >    0.188  -5.482   0.537  1.70
> >    0.290  -6.704   0.631  1.52
> >   -1.651  -5.312  -1.223  1.70
> >   -2.937  -4.579  -1.613  1.70
> >   -0.574  -5.141  -2.296  1.70
> >    1.176  -4.627   0.759  1.55
> >    2.498  -5.094   1.143  1.70
> >    2.761  -4.723   2.603  1.70
> >    2.419  -3.626   3.039  1.52
> >    3.550  -4.532   0.184  1.70
> >    4.901  -5.219   0.390  1.70
> >    3.088  -4.653  -1.269  1.70
> >    3.367  -5.660   3.318  1.55
> >    3.680  -5.446   4.721  1.70
> >    3.170  -6.632   5.540  1.70
> >    3.506  -7.780   5.253  1.52
> >    5.181  -5.203   4.891  1.70
> >    5.583  -3.837   4.332  1.70
> >    5.596  -5.340   6.357  1.70
> >    2.365  -6.315   6.544  1.55
> >    1.805  -7.341   7.408  1.70
> >    0.290  -7.131   7.470  1.70
> >   -0.177  -6.010   7.665  1.52
> >    2.469  -7.320   8.785  1.70
> >    1.742  -8.158   9.839  1.70
> >    1.924  -9.452  10.133  1.70
> >    0.716  -7.748  10.733  1.70
> >    1.083  -9.865  11.146  1.55
> >    0.316  -8.768  11.521  1.70
> >    0.127  -6.473  10.863  1.70
> >   -0.679  -8.673  12.502  1.70
> >   -0.868  -6.378  11.843  1.70
> >   -1.280  -7.428  12.654  1.70
> >   -0.434  -8.227   7.300  1.55
> >   -1.886  -8.177   7.335  1.70
> >   -2.450  -9.168   6.314  1.70
> >   -2.421 -10.377   6.535  1.52
> >   -2.396  -8.406   8.759  1.70
> >   -3.919  -8.552   8.765  1.70
> >   -4.414  -9.077  10.115  1.70
> >   -4.597  -7.237   8.378  1.70
> >   -2.950  -8.617   5.218  1.55
> >   -3.520  -9.437   4.162  1.70
> >   -2.911  -8.986   2.832  1.70
> >   -2.441  -7.856   2.713  1.52
> >   -5.049  -9.363   4.175  1.70
> >   -5.685  -9.886   5.464  1.70
> >   -5.430 -11.035   6.103  1.70
> >   -6.685  -9.267   6.263  1.70
> >   -6.203 -11.165   7.239  1.55
> >   -7.000 -10.031   7.331  1.70
> >   -7.326  -8.027   6.059  1.70
> >   -7.950  -9.688   8.301  1.70
> >   -8.276  -7.685   7.028  1.70
> >   -8.600  -8.471   8.127  1.70
> >   -2.941  -9.893   1.867  1.55
> >   -2.398  -9.603   0.550  1.70
> >   -1.128 -10.429   0.334  1.70
> >   -1.199 -11.583  -0.085  1.52
> >   -3.462  -9.819  -0.527  1.70
> >   -4.741  -9.056  -0.177  1.70
> >   -4.559  -7.552  -0.386  1.70
> >   -5.937  -9.603  -0.960  1.70
> >    0.002  -9.805   0.629  1.55
> >    1.286 -10.468   0.472  1.70
> >    2.197 -10.010   1.613  1.70
> >    1.996  -8.939   2.181  1.52
> >    1.878 -10.197  -0.912  1.70
> >    1.078 -10.811  -2.062  1.70
> >    1.196 -12.040  -2.585  1.70
> >    0.038 -10.215  -2.826  1.70
> >    0.300 -12.239  -3.616  1.55
> >   -0.434 -11.068  -3.761  1.70
> >   -0.502  -8.918  -2.705  1.70
> >   -1.459 -10.767  -4.666  1.70
> >   -1.528  -8.618  -3.610  1.70
> >   -2.013  -9.496  -4.572  1.70
> >    3.182 -10.845   1.912  1.55
> >    4.124 -10.540   2.975  1.70
> >    3.921 -11.521   4.131  1.70
> >    4.350 -12.671   4.056  1.52
> >    5.555 -10.519   2.432  1.70
> >    5.783  -9.277   1.568  1.70
> >    6.347  -8.125   2.403  1.70
> >    6.670  -9.602   0.364  1.70
> >    3.265 -11.030   5.172  1.55
> >    2.998 -11.850   6.342  1.70
> >    1.587 -11.523   6.837  1.70
> >    0.979 -10.552   6.391  1.52
> >    4.071 -11.642   7.414  1.70
> >    5.496 -11.908   6.927  1.70
> >    6.146 -13.079   6.875  1.70
> >    6.441 -10.972   6.424  1.70
> >    7.424 -12.927   6.376  1.55
> >    7.601 -11.578   6.091  1.70
> >    6.290  -9.580   6.254  1.70
> >    8.721 -10.921   5.568  1.70
> >    7.409  -8.923   5.731  1.70
> >    8.603  -9.548   5.388  1.70
> >   -0.219 -12.167   8.311  1.70
> >    1.109 -12.354   7.751  1.55
> >   -1.221 -13.041   7.554  1.70
> >   -1.280 -12.708   6.169  1.52
> >   -1.409   0.501   0.859  1.70
> >   -1.445   1.720   0.692  1.52
> >    1.351  -0.528   0.850  1.70
> >    1.386  -1.747   0.684  1.52
> >
> >     


--


---------------------------

Matthieu Chavent
LORIA
PhD student

tel: ++33(0)3-54-95-86-05

---------------------------