feat: adding from_grid graph generation

.devcontainer/Dockerfile-ubuntu

@@ -1,4 +1,4 @@
-FROM ubuntu:22.04
+FROM ubuntu:23.04
 
 ARG DEBIAN_FRONTEND=noninteractive
 
@@ -16,6 +16,6 @@ RUN apt-get install -y --no-install-recommends\
                     ca-certificates \
                     doxygen \
                     graphviz \ 
-                    python3-pip
+                    pipx
 
-RUN pip install conan==2.0.13
+RUN pipx ensurepath && pipx install conan==2.0.13

.devcontainer/devcontainer.json

@@ -24,13 +24,4 @@
 			]
 		}
 	}
-
-	// Use 'forwardPorts' to make a list of ports inside the container available locally.
-	// "forwardPorts": [],
-
-	// Use 'postCreateCommand' to run commands after the container is created.
-	// "postCreateCommand": "gcc -v",
-
-	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
-	// "remoteUser": "root"
 }

.devcontainer/onCreateCommand.sh

@@ -1,2 +1,11 @@
-conan install conanfile.py --profile:build=conan/profiles/linux-armv8-gcc12-release --profile:host=conan/profiles/linux-armv8-gcc12-release --build=missing --output-folder=build
-conan install conanfile.py --profile:build=conan/profiles/linux-armv8-gcc12-debug --profile:host=conan/profiles/linux-armv8-gcc12-debug --build=missing --output-folder=build
+conan install conanfile.py \
+    --profile:build=conan/profiles/linux-armv8-gcc12-release \
+    --profile:host=conan/profiles/linux-armv8-gcc12-release \
+    --build=missing \
+    --output-folder=build
+
+conan install conanfile.py \
+    --profile:build=conan/profiles/linux-armv8-gcc12-debug \
+    --profile:host=conan/profiles/linux-armv8-gcc12-debug \
+    --build=missing \
+    --output-folder=build

.vscode/extensions.json

@@ -4,6 +4,7 @@
         "ms-vscode.cpptools-themes",
         "ms-vscode.cpptools",
         "ms-vscode.cpptools-extension-pack",
-        "twxs.cmake"
+        "twxs.cmake",
+        "ms-azuretools.vscode-docker"
     ]
 }

.vscode/settings.json

@@ -1,5 +1,6 @@
 // Workspace settings are stored in the workspace .vscode folder and only apply when the workspace is opened.
 {
+    "C_Cpp.default.cppStandard": "c++23",
     "cmake.configureOnOpen": false,
     "files.associations": {
         "cwchar": "cpp",
@@ -77,6 +78,7 @@
         "typeindex": "cpp",
         "typeinfo": "cpp",
         "valarray": "cpp",
-        "variant": "cpp"
+        "variant": "cpp",
+        "*.ipp": "cpp"
     }
 }

example/geography_graph_complete.cpp

@@ -1,7 +1,9 @@
 #include "quetzal/quetzal.hpp"
 #include <filesystem>
 #include <cassert>
-//#include <print>
+// #include <print>
+
+namespace geo = quetzal::geography;
 
 int main()
 {
@@ -13,18 +15,25 @@ int main()
     std::iota(times.begin(), times.end(), 2001);
 
 	// Initialize the landscape: for each var a key and a file, for all a time series.
-	using landscape_type = quetzal::geography::landscape<>;
-	auto env = quetzal::geography::landscape<>::from_files( { {"bio1", file1}, {"bio12", file2} }, times );
-	std::cout << env << std::endl;
+	using landscape_type = geo::landscape<>;
+	auto land = geo::landscape<>::from_files( { {"bio1", file1}, {"bio12", file2} }, times );
+	std::cout << land << std::endl;
 
 	// We convert the grid to a fully connected graph
-	auto graph = env.to_complete_graph<>();
+	auto graph1 = geo::graph_from_grid( land, geo::connect_fully(), geo::isotropy() ); // dense, isotrope migration
+	auto graph2 = geo::graph_from_grid( land, geo::connect_fully(), geo::anisotropy() ); // dense, anisotrope
+
+	auto graph3 = geo::graph_from_grid( land, geo::connect_4_neighbors(), geo::isotropy() ); // sparse, isotrope migration
+	auto graph4 = geo::graph_from_grid( land, geo::connect_4_neighbors(), geo::anisotropy() ); // sparse, anisotrope migration
+
+	auto graph5 = geo::graph_from_grid( land, geo::connect_8_neighbors(), geo::isotropy() ); // sparse, isotrope migration
+	auto graph6 = geo::graph_from_grid( land, geo::connect_8_neighbors(), geo::anisotropy() ); // sparse, anisotrope migration
 
 	// A little helper function
 	auto constexpr sphere_distance = [&]( auto const& p1, auto const& p2 ){ 
-		return env.to_latlon( p1 ).great_circle_distance( env.to_latlon( p2 ) );}
+		return land.to_latlon( p1 ).great_circle_distance( land.to_latlon( p2 ) );}
 
-	auto v = graph.edges()
+	auto v = graph1.edges()
 		| std::transform( [&](auto const& e){ sphere_distance( graph.source( e ), graph.target( e ) );} )
 		| std::transform( [&](auto const& d){ return quetzal::demography::dispersal_kernel::exponential_power( d, {.a=1., .b=5.5} ) ;} )
 		| std::ranges::to<std::vector>();