Rearrange graphics projects into subdirectory

cpp/graphics/opengl-cmake/CMakeLists.txt

@@ -0,0 +1,52 @@
+###############################################################################
+## Author: Shaun Reed                                                        ##
+## Legal: All Content (c) 2021 Shaun Reed, all rights reserved               ##
+##                                                                           ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0  ##
+##############################################################################
+#
+
+# Define CMake version
+cmake_minimum_required(VERSION 3.15)
+
+project(
+    #[[NAME]]    OpenGL-Cmake
+    DESCRIPTION  "Example project for building OpenGL projects with CMake"
+    LANGUAGES    CXX
+)
+
+add_library(lib-opengl-test "src/lib-opengl-test.cpp")
+target_include_directories(lib-opengl-test PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/src)
+
+# Find OpenGL package
+find_package(OpenGL REQUIRED)
+if (OPENGL_FOUND)
+  # Link opengl-test executable to OpenGL
+  target_include_directories(lib-opengl-test PUBLIC ${OPENGL_INCLUDE_DIR})
+  target_link_libraries(lib-opengl-test PUBLIC ${OPENGL_LIBRARIES})
+
+else()
+  message(
+      "Error: CMake was unable to find the OpenGL package\n"
+      "Please install OpenGL and try again\n"
+  )
+endif()
+
+# Find GLUT package
+find_package(GLUT REQUIRED)
+if (GLUT_FOUND)
+  # Link lib-opengl-test executable to GLUT
+  target_include_directories(lib-opengl-test PUBLIC ${GLUT_INCLUDE_DIR})
+  target_link_libraries(lib-opengl-test PUBLIC ${GLUT_LIBRARIES})
+
+else()
+  message(
+      "Error: CMake was unable to find the GLUT package\n"
+      "Please install GLUT (freeglut3-dev) and try again\n"
+  )
+endif()
+
+# Add test executable
+add_executable(opengl-test "apps/test-gl.cpp")
+target_link_libraries(opengl-test PRIVATE lib-opengl-test)
+target_include_directories(opengl-test PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/src)