Guide to Game Development/Rendering and Game Engines/OpenGL/GLUT/Basic 2D window creation

This is some code that you can use for a basic orthographic set-up in a 2D environmentAll of the code was taken from: https://www.youtube.com/watch?v=TH_hA_Sru6Q and then slightly modified and commented. #include <glut.h> void Display() { //OpenGL code used as a viewing example to show it works glClear(GL_COLOR_BUFFER_BIT); glColor3f(1.0, 1.0, 1.0); glBegin(GL_LINES); glVertex3f(0.25, 0.25, 0.0); glVertex3f(0.75, 0.75, 0.0); glEnd(); glutSwapBuffers(); //Swaps the double-buffer } void Init() { //Background colour glClearColor(0.0, 0.0, 0.0, 0.0); glMatrixMode(GL_PROJECTION); //Set-up the scene for as Orthographic glLoadIdentity(); glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0); } int main(int iArgc, char** cppArgv) { glutInit(&iArgc, cppArgv); //Allows glut to initiate with the parameters of main glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH); //Double buffering, RGBA colour space, Depth buffer (displays things in the correct order, things don't overlap in the wrong order) glutInitWindowSize(250, 250); //Sets the size of the window glutInitWindowPosition(200, 200); //Positions the window where 0,0 is the top left corner of your screen glutCreateWindow("GLUT Window"); //Create the window with the name provided Init(); //Set-up what you need to glutReshapeFunc(Reshape); //Sets the function that wants to be called when the form is resized glutDisplayFunc(Display); //the tick function that gets called as fast as it can to update the graphics glutIdleFunc(Display); //Constantly recall the display function glutMainLoop(); //Starts the glut tick loop cycle return 0; } References 50%