<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; ">Hi,<DIV><BR class="khtml-block-placeholder"></DIV><DIV>I have been updating a computer code to use the new gmsh 2.0 file format. In the process I noticed that</DIV><DIV>the new version of gmsh seems to a produce different mesh when given the same .gmsh input file. The code to create the mesh is:</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV> cellsize = 0.0952380952381 ;</DIV><DIV> height = 2.0 ;</DIV><DIV> spacing = 1.0 ;</DIV><DIV> Point(1) = {0 , 0, 0, cellsize } ; </DIV><DIV> Point(2) = {spacing, 0, 0, cellsize } ;</DIV><DIV> Point(3) = {0 , height , 0, spacing } ;</DIV><DIV> Point(4) = {spacing, height, 0, spacing } ;</DIV><DIV> Line(5) = {1, 2} ;</DIV><DIV> Line(6) = {2, 4} ;</DIV><DIV> Line(7) = {4, 3} ;</DIV><DIV> Line(8) = {3, 1} ;</DIV><DIV> Line Loop(9) = {5, 6, 7, 8} ;</DIV><DIV> Plane Surface(10) = {9} ; </DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>This is basically a box that forms 2D triangles when meshed.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Using version 1.65.0, the mesh produced by doing</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV> $ gmsh box.gmsh -2</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>where box.gmsh contains the commands above,</DIV><DIV>produces a mesh with 33 nodes and 75 elements. When version 2.0.4 is used, the mesh has 87 vertices and 172 elements.</DIV><DIV>Should the default meshing be different between these two versions?</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Thanks.</DIV><DIV><BR><DIV> <SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><P style="margin: 0.0px 0.0px 0.0px 0.0px">--</P><P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">Daniel Wheeler</FONT></P><BR class="Apple-interchange-newline"></SPAN></SPAN> </DIV><BR></DIV></BODY></HTML>