CMakeLists.txt

# Project initialization
cmake_minimum_required(VERSION 2.7.2 FATAL_ERROR)

project("opengl_examples")

# Compiler settings
if (CMAKE_CXX_COMPILER_ID MATCHES "GNU")
  # Wall: Enable all warnings about constructors
  # Wextra: Enable some extra warnings
  # Werror: Treat all warnings as errors
  # set(warnings "-Wall -Wextra -Werror")
elseif (CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
  # W4: Show the most warnings
  # WX: Treat all warnings as errors
  # EHsc: Only emit code for exception filters when detected that the code in the try block might throw a C++ exception
  set(warnings "/W4 /EHsc")
  set(CMAKE_CONFIGURATION_TYPES Debug Release)
endif()

# Set warnings
if (NOT CONFIGURED_ONCE)
  set(CMAKE_CXX_FLAGS "${warnings}" CACHE STRING "Flags used by the compiler during all build types." FORCE)
endif()

# Set variables
set(INCLUDE_DIR ${CMAKE_SOURCE_DIR}/include)
set(PROJECTS_DIR ${CMAKE_SOURCE_DIR}/src/projects)

# Add include directories
include_directories(${INCLUDE_DIR})
include_directories(${INCLUDE_DIR}/projects)
include_directories(${INCLUDE_DIR}/glad/include)

# Build and include GLFW
set(GLFW_BUILD_DOCS OFF CACHE BOOL "" FORCE)
set(GLFW_BUILD_TESTS OFF CACHE BOOL "" FORCE)
set(GLFW_BUILD_EXAMPLES OFF CACHE BOOL "" FORCE)
add_subdirectory(${INCLUDE_DIR}/glfw)
include_directories(${INCLUDE_DIR}/glfw/include)
include_directories(${INCLUDE_DIR}/glfw/deps)

# Add subdirectories (projects)
add_subdirectory(${PROJECTS_DIR}/basic_cube)
add_subdirectory(${PROJECTS_DIR}/multiple_attributes_and_buffers)
add_subdirectory(${PROJECTS_DIR}/compute_shader)
add_subdirectory(${PROJECTS_DIR}/texture)
add_subdirectory(${PROJECTS_DIR}/texture_array)
add_subdirectory(${PROJECTS_DIR}/tesselation)
add_subdirectory(${PROJECTS_DIR}/tesselation_displacement_map)
add_subdirectory(${PROJECTS_DIR}/transform_feedback)
add_subdirectory(${PROJECTS_DIR}/geometry_shader)
add_subdirectory(${PROJECTS_DIR}/geometry_shader_normal_viewer)
add_subdirectory(${PROJECTS_DIR}/framebuffers)
add_subdirectory(${PROJECTS_DIR}/read_pixels)
add_subdirectory(${PROJECTS_DIR}/point_sprites)
add_subdirectory(${PROJECTS_DIR}/phong_lighting)
add_subdirectory(${PROJECTS_DIR}/raytracer)
add_subdirectory(${PROJECTS_DIR}/fullscreen_quad)

# Create a variable that is set to true and cached after the first configuration
set(CONFIGURED_ONCE TRUE CACHE INTERNAL "A flag showing that CMake has configured at least once.")