*** empty log message ***

demos/hex.geo

-// an example of a purely hexahedral mesh
-
 lc = 0.3;
-Point(1) = {0,0,0,lc};
-Point(2) = {1,0,0,lc};
-Point(3) = {1,1,0,lc};
-Point(4) = {0,1,0,lc};
+
+// example of a purely hexahedral mesh using only transfinite
+// mesh constraints
+
+Point(1) = {-2,0,0,lc};
+Point(2) = {-1,0,0,lc};
+Point(3) = {-1,1,0,lc};
+Point(4) = {-2,1,0,lc};
+Point(5) = {-2,0,1,lc};
+Point(6) = {-1,0,1,lc};
+Point(7) = {-1,1,1,lc};
+Point(8) = {-2,1,1,lc};
 Line(1) = {4,3};
 Line(2) = {3,2};
 Line(3) = {2,1};
 Line(4) = {1,4};
-Line Loop(5) = {2,3,4,1};
-Plane Surface(6) = {5};
+Line(6) = {5,6};
+Line(7) = {6,7};
+Line(8) = {7,8};
+Line(9) = {8,5};
+Line(10) = {1,5};
+Line(11) = {4,8};
+Line(12) = {2,6};
+Line(13) = {3,7};
+Line Loop(14) = {3,4,1,2};
+Plane Surface(15) = {14};
+Line Loop(16) = {6,7,8,9};
+Plane Surface(17) = {16};
+Line Loop(18) = {10,-9,-11,-4};
+Plane Surface(19) = {18};
+Line Loop(20) = {8,-11,1,13};
+Plane Surface(21) = {20};
+Line Loop(22) = {12,7,-13,2};
+Plane Surface(23) = {22};
+Line Loop(24) = {6,-12,3,10};
+Plane Surface(25) = {24};
+Surface Loop(1) = {17,-25,-23,-21,19,15};
+Volume(1) = {1};
+Transfinite Line{1:4,6:13} = 5;
+Transfinite Surface {15} = {1,2,3,4};
+Transfinite Surface {17} = {5,6,7,8};
+Transfinite Surface {19} = {1,5,8,4};
+Transfinite Surface {21} = {8,7,3,4};
+Transfinite Surface {23} = {6,7,3,2};
+Transfinite Surface {25} = {5,6,2,1};
+Transfinite Volume{1} = {1,2,3,4,5,6,7,8};
+Recombine Surface{15:25:2};
+
+// the same by extruding a transfinite surface mesh
 
-Transfinite Line{1:4} = 5;
-Transfinite Surface{6} = {1,2,3,4};
-Recombine Surface{6};
+Point(51) = {0,0,0,lc};
+Point(52) = {1,0,0,lc};
+Point(53) = {1,1,0,lc};
+Point(54) = {0,1,0,lc};
+Line(51) = {54,53};
+Line(52) = {53,52};
+Line(53) = {52,51};
+Line(54) = {51,54};
+Line Loop(55) = {52,53,54,51};
+Plane Surface(56) = {55};
+Transfinite Line{51:54} = 5;
+Transfinite Surface{56} = {51,52,53,54};
+Recombine Surface{56};
 Extrude {0,0,1} {
-  Surface{6}; Layers{5,1}; Recombine;
+  Surface{56}; Layers{5,1}; Recombine;
 }
 
-
-// we could do the same using only extrusions:
+// and the same by using only extrusions
 
 Point(100) = {2,0,0,lc};
 l[] = Extrude {1,0,0}{
@@ -31,4 +77,12 @@ s[] = Extrude {0,1,0}{
 };
 Extrude {0,0,1}{
   Surface{s[1]}; Layers{4,1}; Recombine;
+}
+
+// add some labels
+
+View "Mesh Info" {
+  T3(-1.5,1.5,0.5,66574){ "Pure Transfinite" };
+  T3(0.5,1.5,0.5,66574){ "Extruded Transfinite" };
+  T3(2.5,1.5,0.5,66574){ "Pure Extruded" };
 };

doc/gmsh.html

@@ -25,7 +25,7 @@ generator with built-in pre- and post-processing facilities</h1>
 <p>
 <h3 align="center">Christophe Geuzaine and Jean-Franois Remacle</h3>
 <p>
-<h3 align=center>Version 1.62, xx 2006</h3>
+<h3 align=center>Version 1.62, January 15 2006</h3>
 <p>
 <center>
   <a href="#Description">Description</a> |