update docs

Author: boriskaus

docs/make.jl

@@ -120,7 +120,9 @@ makedocs(;
             "Gravity code" => "man/gravity_code.md",
             "Numerical model setups" => "man/geodynamic_setups.md",
             "LaMEM" => "man/lamem.md",
+            "pTatin" => "man/lamem.md",
             "Profile Processing" => "man/profile_processing.md",
+            "Gmsh" => "man/gmsh.md",
             "Movies" => "man/movies.md"            
         ],
         "List of functions"  => "man/listfunctions.md",

docs/src/man/datastructures.md

@@ -8,6 +8,8 @@ For plotting, we transfer this into the `ParaviewData` structure, which has cart
 GeoData
 CartData
 UTMData
+Q1Data
+FEData
 ParaviewData
 lonlatdepth_grid
 xyz_grid

docs/src/man/gmsh.md

@@ -0,0 +1,7 @@
+# Gmsh
+
+[Gmsh](https://gmsh.info) is a widely used 3D unstructured mesh generator that produces tetrahedral meshes which can be tagged by region. It is possible to import such meshes and use that to set region info in a `GMG` data set, or use it to generate pTatin input.
+
+```@docs
+GeophysicalModelGenerator.import_Gmsh
+```

docs/src/man/ptatin.md

@@ -0,0 +1,10 @@
+# pTatin
+
+We provide a few routines that allow exporting GMG input data sets to a format that can be read by the 3D geodynamic modelling software [pTatin](https://bitbucket.org/dmay/ptatin-total-dev.git/src), which is an open-source Cartesian code to perform crustal and lithospheric-scale simulations. 
+
+The `Q1Data` format can be saved directly to pTatin.
+
+```@docs
+GeophysicalModelGenerator.write_pTatin_mesh
+GeophysicalModelGenerator.swap_yz_dims
+```