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demos/demo-14.geo

+/* 
+   Gmsh demo file (C) 2000 C. Geuzaine, J.-F. Remacle
+
+   A example of attractors
+
+   All important comments are marked with "README"
+*/
+
+Options{
+  
+  Mesh{
+    Algorithm = 2 ; // This is the new 2D anisotropic algorithm
+  }
+
+}
+
+lc = .1;
+
+Point(1) = {0.0,0.0,0,lc};
+Point(2) = {1,0.0,0,lc};
+Point(3) = {1,1,0,lc};
+Point(4) = {0,1,0,lc};
+
+Line(1) = {3,2};
+Line(2) = {2,1};
+Line(3) = {1,4};
+Line(4) = {4,3};
+
+Line Loop(5) = {1,2,3,4};
+Plane Surface(6) = {5};
+
+Point(5) = {0.1,0.2,0,lc};
+Point(11) = {0.5,0.5,-1,lc};
+Point(22) = {0.6,0.6,1,lc};
+
+Line(5) = {11,22};
+
+Attractor Line{5} = {1, 0.1, 7};
+
+Attractor Point{5} = {0.1, 0.5, 3};