// ----------------------------------------------------------------------------- // // Gmsh C++ tutorial 9 // // Plugins // // ----------------------------------------------------------------------------- // Plugins can be added to Gmsh in order to extend its capabilities. For // example, post-processing plugins can modify views, or create new views based // on previously loaded views. Several default plugins are statically linked // with Gmsh, e.g. Isosurface, CutPlane, CutSphere, Skin, Transform or Smooth. // // Plugins can be controlled through the API functions in the `gmsh::plugin' // namespace, or from the graphical interface (right click on the view button, // then `Plugins'). #include <set> #include <gmsh.h> int main(int argc, char **argv) { gmsh::initialize(); gmsh::model::add("t9"); // Let us for example include a three-dimensional scalar view: try { gmsh::merge("../view3.pos"); } catch(...) { gmsh::logger::write("Could not load post-processing views: bye!"); gmsh::finalize(); return 0; } // We then set some options for the `Isosurface' plugin (which extracts an // isosurface from a 3D scalar view), and run it: gmsh::plugin::setNumber("Isosurface", "Value", 0.67); // Iso-value level gmsh::plugin::setNumber("Isosurface", "View", 0); // Source view is View[0] gmsh::plugin::run("Isosurface"); // Run the plugin! // We also set some options for the `CutPlane' plugin (which computes a // section of a 3D view using the plane A*x+B*y+C*z+D=0), and then run it: gmsh::plugin::setNumber("CutPlane", "A", 0); gmsh::plugin::setNumber("CutPlane", "B", 0.2); gmsh::plugin::setNumber("CutPlane", "C", 1); gmsh::plugin::setNumber("CutPlane", "D", 0); gmsh::plugin::setNumber("CutPlane", "View", 0); gmsh::plugin::run("CutPlane"); // Add a title (By convention, for window coordinates a value greater than // 99999 represents the center. We could also use `General.GraphicsWidth / 2', // but that would only center the string for the current window size.): gmsh::plugin::setString("Annotate", "Text", "A nice title"); gmsh::plugin::setNumber("Annotate", "X", 1.e5); gmsh::plugin::setNumber("Annotate", "Y", 50); gmsh::plugin::setString("Annotate", "Font", "Times-BoldItalic"); gmsh::plugin::setNumber("Annotate", "FontSize", 28); gmsh::plugin::setString("Annotate", "Align", "Center"); gmsh::plugin::setNumber("Annotate", "View", 0); gmsh::plugin::run("Annotate"); gmsh::plugin::setString("Annotate", "Text", "(and a small subtitle)"); gmsh::plugin::setNumber("Annotate", "Y", 70); gmsh::plugin::setString("Annotate", "Font", "Times-Roman"); gmsh::plugin::setNumber("Annotate", "FontSize", 12); gmsh::plugin::run("Annotate"); // We finish by setting some options: gmsh::option::setNumber("View[0].Light", 1); gmsh::option::setNumber("View[0].IntervalsType", 1); gmsh::option::setNumber("View[0].NbIso", 6); gmsh::option::setNumber("View[0].SmoothNormals", 1); gmsh::option::setNumber("View[1].IntervalsType", 2); gmsh::option::setNumber("View[2].IntervalsType", 2); // Launch the GUI to see the results: std::set<std::string> args(argv, argv + argc); if(!args.count("-nopopup")) gmsh::fltk::run(); gmsh::finalize(); return 0; }