Rearrange graphics projects into subdirectory

cpp/graphics/opengl-cmake/apps/test-gl.cpp

@@ -0,0 +1,64 @@
+/*#############################################################################
+## Requires freeglut3-dev to be installed with your package manager          ##
+## To build an executable: `g++ test-gl.cpp -w -lGL -lGLU -lglut -o test`    ##
+##                                                                           ##
+## Testing building OpenGL projects with source code from lazyfoo -          ##
+## https://lazyfoo.net/tutorials/OpenGL/                                     ##
+##############################################################################
+## test-gl.cpp
+*/
+
+#include <lib-opengl-test.hpp>
+
+#include <GL/freeglut.h>
+
+#include <cstdio>
+#include <iostream>
+
+//Screen constants
+const int SCREEN_WIDTH = 640;
+const int SCREEN_HEIGHT = 480;
+const int SCREEN_FPS = 60;
+
+//Color modes
+const int COLOR_MODE_CYAN = 0;
+const int COLOR_MODE_MULTI = 1;
+
+int main( int argc, char* args[] )
+{
+  std::cout << "Press Q to change color mode, E to adjust zoom\n";
+
+
+  //Initialize FreeGLUT
+  glutInit( &argc, args );
+
+  //Create OpenGL 2.1 context
+  glutInitContextVersion( 2, 1 );
+
+  //Create Double Buffered Window
+  glutInitDisplayMode( GLUT_DOUBLE );
+  glutInitWindowSize( SCREEN_WIDTH, SCREEN_HEIGHT );
+  glutCreateWindow( "OpenGL" );
+
+  //Do post window/context creation initialization
+  if( !initGL() )
+  {
+    printf( "Unable to initialize graphics library!\n" );
+    return 1;
+  }
+
+  //Set keyboard handler
+  glutKeyboardFunc( handleKeys );
+
+  //Set rendering function
+  glutDisplayFunc( render );
+
+  //Set main loop
+  glutTimerFunc( 1000 / SCREEN_FPS, runMainLoop, 0 );
+
+  //Start GLUT main loop
+  glutMainLoop();
+
+  return 0;
+}
+