separate classes into separate folders

CMakeLists.txt

@@ -58,11 +58,9 @@ include(polyfem_data)
 ################################################################################
 # Subdirectories
 ################################################################################
-add_library(polyfempy MODULE src/binding.cpp src/raster.cpp)
+pybind11_add_module(polyfempy)
+add_subdirectory(src)
+target_include_directories(polyfempy PRIVATE "${CMAKE_CURRENT_SOURCE_DIR}/src")
 target_link_libraries(polyfempy PRIVATE polyfem::polyfem pybind11::module pybind11::json)
 
 set_target_properties(polyfempy PROPERTIES PREFIX "${PYTHON_MODULE_PREFIX}" SUFFIX "${PYTHON_MODULE_EXTENSION}")
-
-
-
-

src/CMakeLists.txt

@@ -0,0 +1,16 @@
+set(SOURCES
+  binding.cpp
+  raster.cpp
+)
+
+source_group(TREE "${CMAKE_CURRENT_SOURCE_DIR}" PREFIX "Source Files" FILES ${SOURCES})
+target_sources(polyfempy PRIVATE ${SOURCES})
+
+################################################################################
+# Subfolders
+################################################################################
+
+add_subdirectory(differentiable)
+add_subdirectory(mesh)
+add_subdirectory(state)
+add_subdirectory(solver)