CmakeLists.txt

# Set minimum required cmake version to build, anything over 3 is good to get cool new features
cmake_minimum_required(VERSION 3.3 FATAL_ERROR)
# Set the project name, version and supported lang
project(Playground)
# Set our module path, we keep find targets here, macros etc
set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
# Include some stuff from our module path
include(UseModernCpp)
# Must use GNUInstallDirs to install libraries into correct locations on all platforms.
include(GnuInstallDirs)

# set(CMAKE_INCLUDE_CURRENT_DIR ON)

find_package(OpenGL REQUIRED) # is this needed?
find_package(Qt5 REQUIRED COMPONENTS Widgets OpenGL)
#find_package(Assimp REQUIRED)

# if (Qt5Widgets_FOUND)
#     if (Qt5Widgets_VERSION VERSION_LESS 5.7.0)
#         message(FATAL_ERROR "Minimum supported Qt5 version is 5.70!")
#     endif()
# else()
#     message(SEND_ERROR "The Qt5Widgets library could not be found!")
# endif(Qt5Widgets_FOUND)

# Add a compiler flag
# set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -std=c++11")
use_cxx11()

# Disable compiler specific warnings if we are building with MSVC
# NOMINMAX - http://www.suodenjoki.dk/us/archive/2010/min-max.htm
if(MSVC)
    add_definitions("-D_CRT_SECURE_NO_WARNINGS" "-DNOMINMAX")
endif()

# if (CMAKE_COMPILER_IS_GNUCXX)
#     set(CXX_WARNINGS "-Wall -Wextra -Wpointer-arith -Wcast-align -fstrict-aliasing -Wno-unused-local-typedefs -Wno-misleading-indentation -Wno-maybe-uninitialized -Wno-int-in-bool-context -Wno-implicit-fallthrough")
#     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${CXX_WARNINGS} -fvisibility-inlines-hidden")
# endif()

# Project specific flags
SET(WIN32_OPENGL_LINK_FLAGS "-lopengl32 -lgdi32")

# Build type is debug by default
# if(NOT CMAKE_BUILD_TYPE)
#    set(CMAKE_BUILD_TYPE "Debug" ... FORCE)
# endif()

set(GL3W_ROOT "${CMAKE_SOURCE_DIR}/extern/gl3w")

set(GL3W_INC "${GL3W_ROOT}/include")
set(GL3W_SRC "${GL3W_ROOT}/src/gl3w.c")

# TODO - fix this
# if (NOT EXISTS ${GL3W_ROOT})
#     message(STATUS "Updating submodules")
#     execute_process(COMMAND git submodule init)
#     execute_process(COMMAND git submodule update)
# endif()

if (NOT EXISTS ${GL3W_SRC})
    message(STATUS "Generating gl3w source files")
    execute_process(COMMAND python gl3w_gen.py
                    WORKING_DIRECTORY ${GL3W_ROOT})
endif()

# set(ZLIB_LIBRARIES zlibstatic)
# set(ENABLE_BOOST_WORKAROUND ON)
# set(ASSIMP_BUILD_ASSIMP_TOOLS OFF)
# set(ASSIMP_BUILD_TESTS OFF)
# set(ASSIMP_BUILD_STATIC_LIB ON)
# set(ASSIMP_NO_EXPORT ON)
# option(ASSIMP_BUILD_ALL_IMPORTERS_BY_DEFAULT "" OFF)
# option(ASSIMP_BUILD_OBJ_IMPORTER "" ON)

# Override options in subproject, the command MUST match the one in the project, ie set/option
# https://stackoverflow.com/q/14061605/996468
option(ASSIMP_BUILD_ASSIMP_TOOLS "" OFF)
option(ASSIMP_BUILD_TESTS "" OFF)
option(ASSIMP_NO_EXPORT "" OFF)
option(ASSIMP_BUILD_ALL_IMPORTERS_BY_DEFAULT "" OFF)
option(ASSIMP_BUILD_OBJ_IMPORTER "" ON)
option(ASSIMP_BUILD_GLTF_IMPORTER "" ON)
option(ASSIMP_BUILD_FBX_IMPORTER "" ON)
option(ASSIMP_BUILD_ZLIB "" ON)

# set variables that are needed
add_subdirectory(extern/assimp)

# add include directories
# include_directories(
#     "${PROJECT_BINARY_DIR}/extern/assimp/include/"
#     "${PROJECT_SOURCE_DIR}/extern/assimp/include/"
# )
target_include_directories(assimp PUBLIC extern/assimp/include)

# find_package(Assimp REQUIRED)
# include_directories(${ASSIMP_INCLUDE_DIRS})

# if (assimp_FOUND)
#     message(FATAL_ERROR "assimp_FOUND")
# else()
#     message(SEND_ERROR "assimp not found")
# endif(assimp_FOUND)

set(SOURCES
    src/MainWindow.cpp
    src/Framebuffer.cpp
    src/Renderer.cpp
    src/Scene.cpp
    src/Shader.cpp
    src/Model.cpp
    src/Input.cpp
    src/Geometry.cpp
    src/Mesh.cpp
    src/Entity.cpp
    src/Transform.cpp
    src/Trimesh.cpp
    src/GlobalFilter.cpp
    src/Texture.cpp
    src/Camera.cpp
    src/Material.cpp
    src/Widgets/Button.cpp
    src/Widgets/Label.cpp
    src/Widgets/Slider.cpp
    src/Widgets/ColorPicker.cpp
    src/Widgets/TextInput.cpp
    src/Widgets/CheckBox.cpp
    src/Widgets/TexturePicker.cpp
)

set(HEADERS
    src/MainWindow.hpp
    src/Framebuffer.hpp
    src/Renderer.hpp
    src/Scene.hpp
    src/Shader.hpp
    src/Model.hpp
    src/Input.hpp
    src/Geometry.hpp
    src/Mesh.hpp
    src/Entity.hpp
    src/Transform.hpp
    src/Trimesh.hpp
    src/GlobalFilter.hpp
    src/Texture.hpp
    src/Camera.hpp
    src/Material.hpp
    src/Util.hpp
    src/Widgets/Button.hpp
    src/Widgets/Label.hpp
    src/Widgets/Slider.hpp
    src/Widgets/ColorPicker.hpp
    src/Widgets/TextInput.hpp
    src/Widgets/CheckBox.hpp
    src/Widgets/TexturePicker.hpp
)

qt5_wrap_cpp(HEADERS_moc ${HEADERS})

include_directories(
    ${GL3W_INC}
)

SET(BUILD_SHARED_LIBS OFF)

# Make this a GUI application on Windows, otherwise we want debug information to print
if(WIN32 AND CMAKE_BUILD_TYPE EQUAL "Release")
    set(CMAKE_WIN32_EXECUTABLE ON)
    # This may or may not be needed, keep around just in case
    # SET( CMAKE_EXE_LINKER_FLAGS  "${CMAKE_EXE_LINKER_FLAGS} ${WIN32_OPENGL_LINK_FLAGS}" )
endif()

# set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
# set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
# set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)

add_executable(Playground src/main.cpp ${GL3W_SRC} ${SOURCES} ${HEADERS_moc})
target_link_libraries (Playground Qt5::Widgets Qt5::OpenGL assimp ${OPENGL_LIBRARIES})