compas-dev · tomvanmele · Jun 4, 2025 · Jun 3, 2025 · Jun 3, 2025 · Jun 3, 2025
diff --git a/.gitignore b/.gitignore
@@ -26,6 +26,9 @@ _build/
 *.manifest
 *.spec
 
+# Third party dependencies
+.third_party/
+
 # IDE
 .vscode/
 .idea/

diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -18,10 +18,15 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+* Added Clipper2 to CMakeLists.txt
+
 ### Changed
 
+* Mapping method crops the pattern mesh to the boundaries of the target mesh.
+
 ### Removed
 
+* Removed all the modules from __init__.py
 
 ## [0.4.0] 2025-04-05
 

diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -1,166 +1,155 @@
 cmake_minimum_required(VERSION 3.15...3.26)
-
 project(compas_libigl LANGUAGES CXX)
 
 set(CMAKE_CXX_STANDARD 20)
-set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_EXTENSIONS OFF)
-set(CMAKE_BUILD_TYPE Release)
-
-# =====================================================================
-# Set this flag to ON for developing to reduce build time.
-# Set this flag to OFF for publishing for file size reduction.
-# =====================================================================
-option(ENABLE_PRECOMPILED_HEADERS "Enable precompiled headers for the build" ON)
 
-# =====================================================================
-# Set maximum heap size for MSVC
-# =====================================================================
+option(ENABLE_PRECOMPILED_HEADERS "Enable precompiled headers" OFF)
+option(MULTITHREADED_COMPILATION "Enable multi-threaded compilation (Ninja only)" ON)
 
-if(MSVC)
-    set(CMAKE_GENERATOR_PLATFORM x64)
-    add_compile_options(/Zm1200) 
+if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
+  message(STATUS "Setting build type to 'Release' as none was specified.")
+  set(CMAKE_BUILD_TYPE "Release" CACHE STRING "Choose the type of build." FORCE)
+  set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "Debug" "Release" "MinSizeRel" "RelWithDebInfo")
 endif()
 
-# =====================================================================
-# Build size reduction.
-# =====================================================================
-
-if (NOT ENABLE_PRECOMPILED_HEADERS)
-    set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE)
-    if(MSVC)
-        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /O1") # Optimize for size on MSVC
-    else()
-        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Os") # Optimize for size on GCC/Clang
+if(MULTITHREADED_COMPILATION)
+  include(ProcessorCount)
+  ProcessorCount(N)
+  if(NOT N EQUAL 0)
+    message(STATUS "Using ${N} build jobs.")
+    set(CMAKE_PARALLEL_LEVEL ${N})
+    if(CMAKE_GENERATOR MATCHES "^Ninja")
+      set(CMAKE_JOB_POOL_COMPILE compile)
+      set(CMAKE_JOB_POOL_LINK link)
+      set(CMAKE_JOB_POOLS "compile=${N}" "link=2")
     endif()
+  endif()
 endif()
 
-# =====================================================================
-# Dependencies
-# =====================================================================
-include(ExternalProject)
-
-# Define source directories for external dependencies
-set(EXTERNAL_DIR "${CMAKE_CURRENT_SOURCE_DIR}/external")
-set(EIGEN_SOURCE_DIR "${EXTERNAL_DIR}/eigen")
-set(LIBIGL_SOURCE_DIR "${EXTERNAL_DIR}/libigl")
-
-# Create directories if they don't exist
-file(MAKE_DIRECTORY ${EXTERNAL_DIR})
-file(MAKE_DIRECTORY ${EIGEN_SOURCE_DIR})
-file(MAKE_DIRECTORY ${LIBIGL_SOURCE_DIR})
-
-# Download Eigen first
-if(NOT EXISTS "${EIGEN_SOURCE_DIR}/Eigen")
-    message(STATUS "Downloading Eigen...")
-    ExternalProject_Add(
-        eigen_download
-        PREFIX ${EXTERNAL_DIR}
-        URL https://gitlab.com/libeigen/eigen/-/archive/3.4.0/eigen-3.4.0.tar.gz
-        SOURCE_DIR "${EIGEN_SOURCE_DIR}"
-        CONFIGURE_COMMAND ""
-        BUILD_COMMAND ""
-        INSTALL_COMMAND ""
-        LOG_DOWNLOAD ON
-        UPDATE_COMMAND ""
-        PATCH_COMMAND ""
-    )
+if(UNIX AND NOT APPLE)
+  if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
+    set(CMAKE_INSTALL_PREFIX "${CMAKE_INSTALL_PREFIX}/share/${PROJECT_NAME}" CACHE PATH "Install prefix" FORCE)
+  endif()
 endif()
 
-# Download libigl after Eigen
-if(NOT EXISTS "${LIBIGL_SOURCE_DIR}/include/igl")
-    message(STATUS "Downloading libigl...")
-    ExternalProject_Add(
-        libigl_download
-        DEPENDS eigen_download
-        PREFIX ${EXTERNAL_DIR}
-        URL https://github.com/libigl/libigl/archive/refs/heads/main.zip
-        SOURCE_DIR "${LIBIGL_SOURCE_DIR}"
-        CONFIGURE_COMMAND ""
-        BUILD_COMMAND ""
-        INSTALL_COMMAND ""
-        LOG_DOWNLOAD ON
-        UPDATE_COMMAND ""
-        PATCH_COMMAND ""
-        DOWNLOAD_EXTRACT_TIMESTAMP TRUE
-    )
+# Use custom directory for 3rd-party dependencies (optional but persistent)
+set(FETCHCONTENT_BASE_DIR "${CMAKE_SOURCE_DIR}/.third_party")
+set(FETCHCONTENT_QUIET OFF)
+set(FETCHCONTENT_UPDATES_DISCONNECTED ON)
+
+include(FetchContent)
+
+# === Eigen ===
+# Check if Eigen already exists
+set(EIGEN_DIR "${FETCHCONTENT_BASE_DIR}/eigen-src")
+if(EXISTS "${EIGEN_DIR}")
+  message(STATUS "Using existing Eigen from ${EIGEN_DIR}")
+  set(eigen_SOURCE_DIR "${EIGEN_DIR}")
+  set(eigen_BINARY_DIR "${FETCHCONTENT_BASE_DIR}/eigen-build")
 endif()
 
-# Create a custom target for all external dependencies
-add_custom_target(external_downloads ALL)
-if(TARGET eigen_download)
-    add_dependencies(external_downloads eigen_download)
+FetchContent_Declare(
+  eigen
+  URL https://gitlab.com/libeigen/eigen/-/archive/3.4.0/eigen-3.4.0.tar.gz
+  SOURCE_DIR "${eigen_SOURCE_DIR}"
+  BINARY_DIR "${eigen_BINARY_DIR}"
+  DOWNLOAD_EXTRACT_TIMESTAMP TRUE
+)
+FetchContent_MakeAvailable(eigen)
+
+# === libigl ===
+# Check if libigl already exists
+set(LIBIGL_DIR "${FETCHCONTENT_BASE_DIR}/libigl-src")
+if(EXISTS "${LIBIGL_DIR}")
+  message(STATUS "Using existing libigl from ${LIBIGL_DIR}")
+  set(libigl_SOURCE_DIR "${LIBIGL_DIR}")
+  set(libigl_BINARY_DIR "${FETCHCONTENT_BASE_DIR}/libigl-build")
 endif()
-if(TARGET libigl_download)
-    add_dependencies(external_downloads libigl_download)
+
+FetchContent_Declare(
+  libigl
+  GIT_REPOSITORY https://github.com/libigl/libigl.git
+  GIT_TAG main
+  SOURCE_DIR "${libigl_SOURCE_DIR}"
+  BINARY_DIR "${libigl_BINARY_DIR}"
+)
+FetchContent_MakeAvailable(libigl)
+
+# === Clipper2 ===
+# Check if Clipper2 already exists
+set(CLIPPER2_DIR "${FETCHCONTENT_BASE_DIR}/clipper2-src")
+if(EXISTS "${CLIPPER2_DIR}")
+  message(STATUS "Using existing Clipper2 from ${CLIPPER2_DIR}")
+  set(clipper2_SOURCE_DIR "${CLIPPER2_DIR}")
+  set(clipper2_BINARY_DIR "${FETCHCONTENT_BASE_DIR}/clipper2-build")
 endif()
 
-# Add include directories for external dependencies
-set(EIGEN_INCLUDE_DIR "${EIGEN_SOURCE_DIR}")
-set(LIBIGL_INCLUDE_DIR "${LIBIGL_SOURCE_DIR}/include")
-
-if (NOT SKBUILD)
-  message(WARNING "\
-  This CMake file is meant to be executed using 'scikit-build'. Running
-  it directly will almost certainly not produce the desired result. If
-  you are a user trying to install this package, please use the command
-  below, which will install all necessary build dependencies, compile
-  the package in an isolated environment, and then install it.
-  =====================================================================
-   $ pip install .
-  =====================================================================
-  If you are a software developer, and this is your own package, then
-  it is usually much more efficient to install the build dependencies
-  in your environment once and use the following command that avoids
-  a costly creation of a new virtual environment at every compilation:
-  =====================================================================
-   $ pip install nanobind scikit-build-core[pyproject]
-   $ pip install --no-build-isolation -ve .
-  =====================================================================
-  You may optionally add -Ceditable.rebuild=true to auto-rebuild when
-  the package is imported. Otherwise, you need to re-run the above
-  after editing C++ files.")
+FetchContent_Declare(
+  clipper2
+  URL https://github.com/AngusJohnson/Clipper2/releases/download/Clipper2_1.5.3/Clipper2_1.5.3.zip
+  SOURCE_DIR "${clipper2_SOURCE_DIR}"
+  BINARY_DIR "${clipper2_BINARY_DIR}"
+  DOWNLOAD_EXTRACT_TIMESTAMP TRUE
+)
+FetchContent_MakeAvailable(clipper2)
+
+# Build Clipper2 as a static library
+file(GLOB CLIPPER2_SRC "${clipper2_SOURCE_DIR}/CPP/Clipper2Lib/src/*.cpp")
+
+add_library(clipper2_static STATIC ${CLIPPER2_SRC})
+target_include_directories(clipper2_static PUBLIC "${clipper2_SOURCE_DIR}/CPP/Clipper2Lib/include")
+set_target_properties(clipper2_static PROPERTIES POSITION_INDEPENDENT_CODE ON)
+
+# Install clipper2 static lib and headers if not already installed
+set(CLIPPER2_HEADERS_DEST "${CMAKE_INSTALL_PREFIX}/include/clipper2")
+if(NOT EXISTS "${CLIPPER2_HEADERS_DEST}")
+  message(STATUS "Installing Clipper2 headers and library")
+  install(TARGETS clipper2_static ARCHIVE DESTINATION lib)
+  install(DIRECTORY "${clipper2_SOURCE_DIR}/CPP/Clipper2Lib/include/clipper2" DESTINATION include)
 endif()
 
-# Find Python and nanobind
-find_package(Python 3.8
-  REQUIRED COMPONENTS Interpreter Development.Module
-  OPTIONAL_COMPONENTS Development.SABIModule)
+# === Include paths ===
+set(EIGEN_INCLUDE_DIR ${eigen_SOURCE_DIR})
+set(LIBIGL_INCLUDE_DIR ${libigl_SOURCE_DIR}/include)
+set(CLIPPER2_INCLUDE_DIR ${clipper2_SOURCE_DIR}/CPP/Clipper2Lib/include)
+
+# === Python & nanobind ===
+find_package(Python 3.8 REQUIRED COMPONENTS Interpreter Development.Module OPTIONAL_COMPONENTS Development.SABIModule)
 find_package(nanobind CONFIG REQUIRED)
 find_package(Threads REQUIRED)
 
-# Create a shared precompiled header library
+# === Precompiled headers ===
 if (ENABLE_PRECOMPILED_HEADERS)
     add_library(compas_pch INTERFACE)
     target_precompile_headers(compas_pch INTERFACE src/compas.hpp)
     target_include_directories(compas_pch INTERFACE
         ${EIGEN_INCLUDE_DIR}
         ${LIBIGL_INCLUDE_DIR}
+        ${CLIPPER2_INCLUDE_DIR}
     )
 endif()
 
-# Function to add a nanobind module with include directories
+# === Function to add nanobind modules ===
 function(add_nanobind_module module_name source_file)
     nanobind_add_module(${module_name} STABLE_ABI NB_STATIC ${source_file})
+    add_dependencies(${module_name} clipper2_static)
 
-    # Ensure external dependencies are downloaded first
-    add_dependencies(${module_name} external_downloads)
-
-    # Add include directories and link PCH if enabled
     if (ENABLE_PRECOMPILED_HEADERS)
         target_link_libraries(${module_name} PRIVATE compas_pch)
     else()
         target_include_directories(${module_name} SYSTEM PRIVATE
             ${EIGEN_INCLUDE_DIR}
             ${LIBIGL_INCLUDE_DIR}
+            ${CLIPPER2_INCLUDE_DIR}
         )
     endif()
 
-    target_link_libraries(${module_name} PRIVATE Threads::Threads)
+    target_link_libraries(${module_name} PRIVATE Threads::Threads clipper2_static)
     install(TARGETS ${module_name} LIBRARY DESTINATION compas_libigl)
 endfunction()
 
-# Add modules
+# === Add your modules ===
 add_nanobind_module(_nanobind src/nanobind.cpp)
 add_nanobind_module(_types_std src/types_std.cpp)
 add_nanobind_module(_boundaries src/boundaries.cpp)