I am trying to create a geometry corresponding to a cylinder which has a bend. As shown in the Gmsh code appended below, I am using an extrusion with translation, a 2nd extrusion with translation + rotation, and a 3rd extrusion with just translation.
The 2nd extrusion begins from the end of the 1st extrusion, as intended. However, the final circular surface of the 2nd extrusion isn't located at the end of the extrusion, but rather is offset in the y and z directions, so the 3rd extrusion doesn't start in the right place. (The effect can be seen in the screenshot at http://audilab.bmed.mcgill.ca/~funnell/gmsh_bad_extrude.png .) If I do either translation or rotation alone in the 2nd extrusion, I get the results that I expect. Could someone please explain what I'm doing wrong here? Thank you. - Robert --------------------------------------------- charLen = 0.1; Point(1) = {0,0,0,charLen}; Point(2) = {1,0,0,charLen}; Point(3) = {0,1,0,charLen}; Point(4) = {-1,0,0,charLen}; Point(5) = {0,-1,0,charLen}; Circle(1) = {2,1,3}; Circle(2) = {3,1,4}; Circle(3) = {4,1,5}; Circle(4) = {5,1,2}; Line Loop(5) = {1,2,3,4}; Plane Surface(6) = {5}; extr1[] = Extrude {0,0,20} { Surface{6}; }; extr2[] = Extrude { {0,0,5}, {1,0,0} , {0,-1,20} , -Pi/2 } { Surface{extr1[0]}; }; Extrude {0,10,0} { Surface{extr2[0]}; }; _______________________________________________ gmsh mailing list [email protected] http://www.geuz.org/mailman/listinfo/gmsh
