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if(NOT TARGET clipper) # If there is a clipper target in the parent project we are good to go.
find_package(Clipper 6.1)
if(NOT CLIPPER_FOUND)
find_package(Subversion QUIET)
if(Subversion_FOUND)
set(URL_CLIPPER "https://svn.code.sf.net/p/polyclipping/code/trunk/cpp"
CACHE STRING "Clipper source code repository location.")
message(STATUS "Clipper not found so it will be downloaded.")
# Silently download and build the library in the build dir
if (CMAKE_VERSION VERSION_LESS 3.2)
set(UPDATE_DISCONNECTED_IF_AVAILABLE "")
else()
set(UPDATE_DISCONNECTED_IF_AVAILABLE "UPDATE_DISCONNECTED 1")
endif()
include(DownloadProject)
download_project( PROJ clipper_library
SVN_REPOSITORY ${URL_CLIPPER}
SVN_REVISION -r540
#SOURCE_SUBDIR cpp
INSTALL_COMMAND ""
CONFIGURE_COMMAND "" # Not working, I will just add the source files
${UPDATE_DISCONNECTED_IF_AVAILABLE}
)
# This is not working and I dont have time to fix it
# add_subdirectory(${clipper_library_SOURCE_DIR}/cpp
# ${clipper_library_BINARY_DIR}
# )
add_library(ClipperBackend STATIC
${clipper_library_SOURCE_DIR}/clipper.cpp
${clipper_library_SOURCE_DIR}/clipper.hpp)
target_include_directories(ClipperBackend INTERFACE
${clipper_library_SOURCE_DIR})
else()
message(FATAL_ERROR "Can't find clipper library and no SVN client found to download.
You can download the clipper sources and define a clipper target in your project, that will work for libnest2d.")
endif()
else()
add_library(ClipperBackend INTERFACE)
target_link_libraries(ClipperBackend INTERFACE Clipper::Clipper)
endif()
else()
# set(CLIPPER_INCLUDE_DIRS "" PARENT_SCOPE)
# set(CLIPPER_LIBRARIES clipper PARENT_SCOPE)
add_library(clipperBackend INTERFACE)
target_link_libraries(clipperBackend INTERFACE clipper)
endif()
# Clipper backend is not enough on its own, it still needs some functions
# from Boost geometry
if(NOT Boost_INCLUDE_DIRS_FOUND)
find_package(Boost 1.58 REQUIRED)
# TODO automatic download of boost geometry headers
endif()
target_include_directories(clipperBackend SYSTEM INTERFACE ${Boost_INCLUDE_DIRS} )
#target_sources(ClipperBackend INTERFACE
# ${CMAKE_CURRENT_SOURCE_DIR}/geometries.hpp
# ${CMAKE_CURRENT_SOURCE_DIR}/clipper_polygon.hpp
# ${SRC_DIR}/libnest2d/utils/boost_alg.hpp )
target_compile_definitions(clipperBackend INTERFACE LIBNEST2D_BACKEND_CLIPPER)
# And finally plug the ClipperBackend into libnest2d
#target_link_libraries(libnest2d INTERFACE ClipperBackend)
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