Dzint/simplicial embedding app

CMakeLists.txt

@@ -192,7 +192,7 @@ endif()
 # git repo used for wmtk data if it is required.
 # use wmtk_download_data to obtain the path to the data
 set(WMTK_DATA_REPOSITORY https://github.com/wildmeshing/data.git CACHE STRING "Git repo for testing data" )
-set(WMTK_DATA_TAG 6f171d11283d2977913a1b4e6129f9808357baf9 CACHE STRING "git tag for testing data" )
+set(WMTK_DATA_TAG 4d00f0c76599c4d9fa614d0abd6faab42fdb0a24 CACHE STRING "git tag for testing data" )
 
 
 add_subdirectory(components)

applications/CMakeLists.txt

@@ -37,6 +37,7 @@ add_application(shortest_edge_collapse ON)
 add_application(insertion ON)
 add_application(convert ON)
 add_application(longest_edge_split ON)
+add_application(simplicial_embedding ON)
 
 
 wmtk_generate_test_config("${WMTK_TEST_CONFIG}")

applications/simplicial_embedding/CMakeLists.txt

@@ -0,0 +1,18 @@
+wmtk_add_application(simplicial_embedding_app
+    simplicial_embedding_main.cpp
+    simplicial_embedding_spec.hpp
+    )
+
+
+
+
+# delaunay requires the input component and the delaunay component
+target_link_libraries(simplicial_embedding_app PRIVATE
+wmtk::input
+wmtk::simplicial_embedding
+wmtk::output)
+
+wmtk_register_integration_test(
+    EXEC_NAME simplicial_embedding_app
+    CONFIG_FILE ${CMAKE_CURRENT_SOURCE_DIR}/simplicial_embedding_test_config.json
+)

applications/simplicial_embedding/README.md

@@ -0,0 +1,18 @@
+# Simplicial Embedding
+
+A substructure is simplicially embedded, if every simplex of the embedding contains only a single substructure simplex and its faces.
+
+![simplicial embedding](img/regular_simplices.svg)
+
+To create a simplicial embedding, we use the following split operations:
+
+![simplex split](img/simplex_split.svg)
+
+This application expects a .msh file with tags on tetrahedra that represent substructures. The tags must be integer numbers.
+
+Currently, the application has two different modes.
+
+1. Specify a `tag_value`: The mesh is modified such that it becomes a simplicial embedding of the given tag.
+2. Set `embed_interfaces` to true: The interfaces between all substructures (including the boundary) are considered as substructure. The mesh is modified such that it becomes a simplicial embedding of that substructure. The `tag_value` is ignored in that mode.
+
+The output is a .msh file with the modified mesh and the tag attribute.