add flann and eigen submodule, fix flann for cpp .so compile

.gitignore

@@ -1,3 +1,4 @@
 [Bb]uild/
 .vscode/
 input/
+.cache/

.gitmodules

@@ -0,0 +1,6 @@
+[submodule "thirdparty/flann"]
+	path = thirdparty/flann
+	url = [email protected]:Shahabaz-Bagwan/flann.git
+[submodule "thirdparty/eigen"]
+	path = thirdparty/eigen
+	url = https://gitlab.com/libeigen/eigen.git

CMakeLists.txt

@@ -1,16 +1,16 @@
 # min. version of cmake required for this project
-CMAKE_MINIMUM_REQUIRED( VERSION 3.18)
+CMAKE_MINIMUM_REQUIRED( VERSION 3.10)
 
 # name of the project
 PROJECT(pointCloudFilters)
 
-find_package( Eigen3 3.3 REQUIRED NO_MODULE)
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
-set(FLANN_INCLUDE_DIR "/usr/local/include/flann")
-# set(EIGEN3_INCLUDE_DIR "/usr/include/eigen3")
+set(EIGEN3_INCLUDE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/thirdparty/eigen")
+set(FLANN_INCLUDE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/thirdparty/flann/src/cpp")
 
 # specify the C++ standard
-SET(CMAKE_CXX_STANDARD 14)
+SET(CMAKE_CXX_STANDARD 17)
 SET(CMAKE_CXX_STANDARD_REQUIRED True)
 
 # collect all the .cxx needed for executable 
@@ -23,11 +23,4 @@ INCLUDE_DIRECTORIES("${CMAKE_CURRENT_SOURCE_DIR}/include" "${EIGEN3_INCLUDE_DIR}
 ADD_EXECUTABLE (${PROJECT_NAME} ${SOURCES})
 
 # Link dependencies
-TARGET_LINK_LIBRARIES (${PROJECT_NAME} Eigen3::Eigen /usr/local/lib/libflann_cpp.so)
-
-# Provide other include dirs required for the project
-# TARGET_INCLUDE_DIRECTORIES(${PROJECT_NAME} ${HEADERS} )
-
-# When installing where to install 
-INSTALL(TARGETS ${PROJECT_NAME} DESTINATION ~/.local/bin) 
-INSTALL(FILES ${cmake_current_source_dir}/include DESTINATION ~/.local/include) 
+TARGET_LINK_LIBRARIES (${PROJECT_NAME} ${CMAKE_CURRENT_SOURCE_DIR}/thirdparty/flann/build/lib/libflann.so)