<html><head><meta http-equiv="Content-Type" content="text/html charset=iso-8859-1"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">Hi Stephanie,<div><div><div><br></div><div>the only trick I had found at the time is in three steps (there may be more direct solutions, if so, I'm interested!):</div><div><br></div><div>1) mesh only the "skin" of your domain (2D mesh), save it in a .msh file</div><div>2) move the nodes of the surface to match with your topography (use an external program that reads the .msh, interpolates the topography on the appropriate faces and rewrites your .msh).</div><div>3) in a .geo file, merge this new .msh, define the volume and then mesh it (3D mesh) (for example, if the initial domain has 6 faces : Merge "skin_modified.msh"; Surface Loop(1) = {1,2,3,4,5,6}; Volume(1)={1}; )</div><div><br></div><div>Best,</div><div><br></div><div>Riad</div><div><br></div><div><img apple-inline="yes" id="C58DD49C-FA1E-4C31-90C9-903DAC6B2088" height="575" width="733" apple-width="yes" apple-height="yes" src="cid:0ED532DB-9076-41FF-9D16-BBABDE3999C5@unice.fr"></div><div><br></div><div>Le 21 sept. 2018 à 02:12, Stephanie Jarvis <<a href="mailto:Stephanie.Jarvis@colorado.edu">Stephanie.Jarvis@colorado.edu</a>> a écrit :</div><br class="Apple-interchange-newline"><blockquote type="cite"><div dir="ltr"><div>Hello,</div><div><br></div><div>Can gmsh can handle topography? I see this has been asked several times but I can't find a resolution. I have surveyed grid points from a hillslope surface that I need to create a 3D mesh for (top of the box is the hillslope topography, bottom is flat extending into the surface). I've tried embedding the points into a surface I create around them, using Point In Surface, but the points mesh as holes (if they're below that surface) or in the air by themselves (if they're above)--there is no interpolation between them. I've also tried several variations of lines and splines connecting the points, but I can't get that to mesh successfully. Plugin(Tetrahedralize) looks promising, but it's unclear to me how to use it--is it possible to get a "View" out of a bunch of points? Or do I need to create an interpolated surface outside of gmsh and bring that in to mesh?<br></div><div><br></div><div>Thank you!</div><div>Stephanie<br></div></div>
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<div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div>-----------------------------------------------------------------<br>Riad HASSANI<br>GéoAzur<br>Université Nice-Sophia Antipolis<br>250 rue Albert Einstein<br>Sophia Antipolis<br>06560 Valbonne - France<br>tel. : 33 (0) 4 83 61 86 71 / 33 (0) 4 92 07 65 89</div><div><br></div></div><br class="Apple-interchange-newline"></div><br class="Apple-interchange-newline"><br class="Apple-interchange-newline">
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