freefem++-doc 3.19.1-1 / usr / share / doc / freefem++ / examples / examples-bamg / test / dotest.pl

This file is indexed.

/usr/share/doc/freefem++/examples/examples-bamg/test/dotest.pl is in freefem++-doc 3.19.1-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below. 

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
#!/usr/bin/perl
# -----  clean ---
unlink <*.mesh>;
unlink <*.am_fmt>;
unlink <*.mtr>;
unlink <*.bb>;
unlink <*.BB>;
unlink <YG_trace*>;
unlink 'PLOT';

##$f="10 +  1/(1+ 100**(sin(x*3)-y)) ";
#$f1 = "(10*x*x*x+y*y*y) + 10/(1+10**(10*((sin(5*x)-2*y)))) ";
$f1=" sin(3*x)*cos(5*y)+ atan2(0.001,x**2 + y**2 - 0.5 )";
#$f1=" 8*(x-y)**2 + (x+y)**2";

$err=0.1;
$errg=0.01;
$nbiteration=10;
$bamg=$ENV{'bamg'};
$quadoption="";
$bamgoption=" -AbsError -NbJacobi 2  -NbSmooth 5 -anisomax 5 -hmax 0.5   -ratio 2  -nbv 100000 ";
#$bamgoption=" -AbsError -NbJacobi 3  -ratio 2 -anisomax 30";
#$quadoption=" -2q -thetaquad 30 -coef 2";

# ---  change x in $x and y in $y 
$_=$f1;
s/x/\$x/g;
s/y/\$y/g;
$f1="$_;";

print "The function = f1(x,y) = $f1 \n";

#--------------------------
$suffixe=".mesh";
$iteration=0;
$GH="Gh$suffixe";
$TH="Th$iteration$suffixe";
$, = ' ';               # set output field separator
$\ = "\n";              # set output record separator
##  -------------------------------------------------------------
##  --- construction the Geometry file Gh.mesh 

##    8 points on circle of radius r 
open(GH,">$GH")  || die "Can't redirect stdout";
$Pi = 3.14159265358979;

$i8 = 8;
$r = 1;
$c0x = 0;
$c0y = 0;
print GH 'Dimension', 2;
print GH 'MaximalAngleOfCorner 46';

print GH 'Vertices';
print GH   $i8;

# vertex on circle  (counter clock wise)
for ($i = 0; $i < $i8; $i++) {
    $t = $i * $Pi * 2 / $i8;
    print GH $c0x + $r * (cos($t)), $c0y + $r * sin($t), 5;
}

print GH 'Edges',  $i8+1;

print GH 1,5,10;
# edge on circle 
$k =  1;
$j = $i8 - 1;
# previous points
for ($i = 0; $i < $i8; $j = $i++) {
    print GH $k + $j, $k + $i, 5;
}
# previous, current vertex

#   one subdomain, region on left side of the wing
#   because clock wise sens.
print GH 'SubDomain', 2;
print GH 2, 1, 1, 0;
print GH 2, 1, -1, 1;
close GH;
##  -------------- END construct of the geom 
## 

# -- make the DATA file for the mesh to also  save the arguments 
open(BAMG,">DATA_bamg")  || die "Can't open  DATA_bamg";
print BAMG "$quadoption $bamgoption  -g $GH -o $TH  -v 9 -oam_fmt $TH.am_fmt";
close(BAMG);

## constructio the inital  mesh 
!system($bamg) || die "Error in bamg construction of initial  mesh $Th";

##  the adpatation loop 
while ($iteration<$nbiteration) {

    

    $BB="$iteration.BB";   
    $ERRBB="err$iteration.bb";   

    
##  construction of the solution  
    $errsol=0;
    open (TH,"<$TH") ||  die "Can't open  $TH";
    open (BB,">$BB") ||  die "Can't open  $BB";
    open (ERRBB,">$ERRBB") ||  die "Can't open  $ERRBB";


    while (<TH>) {
	if(/^Vertices$/) {
	    $nbv=<TH>;
	    chop($nbv);
	    print BB "2 1 1 $nbv 2";

	    for ($i=1;$i<=$nbv;$i++) {
		($x,$y,$ref)=split(/[\ \t\n]+/, <TH>);
		$f1xy=eval $f1;

		$xx[$i]=$x;
		$yy[$i]=$y;
		$ff[$i]=$f1xy;


		print BB $f1xy ;

	    };
	};
	if(/^Triangles$/) {
	    $nbt=<TH>;
	    chop($nbt);
	    print " Nb of Triangles = $nbt \n";
	    print ERRBB "2 1 $nbt 1";
	    for ($i=1;$i<=$nbt;$i++) {
		($i0,$i1,$i2,$ref)=split(/[\ \t\n]+/, <TH>);

		$x   = ($xx[$i0]+$xx[$i1]+$xx[$i2])/3;
		$y   = ($yy[$i0]+$yy[$i1]+$yy[$i2])/3;
		$fm  = ($ff[$i0]+$ff[$i1]+$ff[$i2])/3;
		$fxy = eval $f1;
		$vv=($fm-$fxy);
		$vv= ($vv<0)?-$vv:$vv;
		print ERRBB $vv;
		$errsol = ($errsol>$vv) ? $errsol : $vv;
	    };
	};

    };
    close TH;
    close BB;
    close ERRBB;
    print " ---------------------------------------------\n";
    print "\n\n Iteration $iteration\n Erreur L_infini = $errsol \n\n";
    print " ---------------------------------------------\n";

##  -----------------------
    
    $MTR="M$iteration.mtr";

    $iteration++;
    $BTH=$TH;
    $TH="Th$iteration$suffixe";

    open(BAMG,">DATA_bamg")  || die "Can't open  DATA_bamg";
    print BAMG "$quadoption  $bamgoption  -MBB $BB -errg $errg -err $err   -b $BTH -o $TH  -v 9 -oM $MTR -oam_fmt $TH.am_fmt -wBB /tmp/tyty ";
    close(BAMG);
    !system($bamg) ||    die "Error in bamg construction of adapted $iteration  mesh $Th";
}

print "Normal End\n";

APT Browse - Built by Thomas Orozco.