cgal/Ridges_3/examples/Ridges_3

Program blind.exe
-----------------
takes an filename.off file as input,
it computes a jet fitting to set the monge data at each vertex 
computes the ridge lines

it outputs the results in :
1. filename.off.4ogl.txt  which can be visualized with 
	the demo program visu.exe
2. if option -v, filename.off.verb.txt contains human readable results

Usage is : blind  with options    
    "f:fName <string>",	 // filename.off
    "d:deg <int>",	 // degree of the jet fitting must be >=3, default is 4
    "m:mdegree <int>",	 // degree of the Monge rep must be >=3, default is 4
    "a:nrings <int>",	 // # rings 
			0 means collect enough rings to make appro possible
			k>=1 fixes the nb of rings to be collected
    "p:npoints <int>",   //# points
			0 means this option is not considered, this is the default
			n>=1 fixes the nb of points to be used
    "v|",                // verbose?
 
Note : if the nb of collected points is less than the required min number of 
   points to make the approxiamtion possible (which is constrained by the deg)
   then the vertex is skipped.





 ./blind.exe -f data/ellipe0.003.off -d3 -m3 -a3
 ./blind.exe -f data/poly2x\^2+y\^2-0.062500-off -d2 -m2 -a2   

visu with:

./visu.exe ../../examples/Jet_fitting_3/data/poly2x\^2+y\^2-0.062500-off ../../examples/Jet_fitting_3/data_poly2x\^2+y\^2-0.062500-off.4ogl.txt


sur ellipsoid plus precise:
./blind.exe -f data/ellipsoid_u_0.02 -d4 -m4 -a3 -t4
./visu.exe ../../examples/Ridges_3/data/ellipsoid_u_0.02 ../../examples/Ridges_3/data_ellipsoid_u_0.02.4ogl.txt



----------------------------Surface de mailleur2 de Steve
-------------------------------------
Ellipsoid

 ./txt/umbilics_ridges_4.ex -f off/mailleur2/ellipsoid_u_0.05  -s -A0 -P -D1 -n -u1 -d4

 ./txt/umbilics_ridges_4.ex -f off/mailleur2/ellipsoid_u_0.02  -s -A3 -P -D1 -n -d4 -u2 
avec -u 1, 2, 3 le nombre de faux umbilics duminiue jusqu'a 0;
avec -A0: ridges assez irregulier
     -A3: plus reg, un ridge isole, reduit le nb de faux umbilics 

./txt/umbilics_ridges_4.ex -f off/mailleur2/ellipsoid_u_0.01 -s -A5 -P -D1 -n -d4 
ok, moins de A5 introduit bp de bruit