Guide to Game Development/Rendering and Game Engines/OpenGL/GLUT/Basic 3D window creation

Here's the C++ code for creating a basic perspective window for a 3D environment:

#include <iostream>
#include <glut.h>

using namespace std;

void Init() {
	glClearColor(0.2, 0.0, 0.0, 0.0); //Write your openGL set-up commands
}
void Display() {
        //OpenGL functions to draw a basic triangle
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
	glLoadIdentity();
	glBegin(GL_TRIANGLES);
		glColor3f(1.0,0.0,0.0);
		glVertex3f(-1.0, -1.0, -3.0);
		glColor3f(0.0,1.0,0.0);
		glVertex3f(0.0, 1.0, -3.0);
		glColor3f(0.0,0.0,1.0);
		glVertex3f(1.0, -1.0, -3.0);
	glEnd();
        //


	glutSwapBuffers(); //Swaps the double-buffer
}
void Reshape(int w, int h){
        //This fixes resize problems
	if (h == 0){
		h = 1;
	}
	float ratio = (float)w/h;
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	glViewport(0,0,w,h);		  		
	gluPerspective(45, //FOV
				   ratio, //Aspect Ratio
				   0.01, //Closest thing you can see
				   1000); //Furthest thing you can see
	glMatrixMode(GL_MODELVIEW);
}

int main(int Argc, char** Argv) {
	glutInit(&Argc, Argv); //Allows glut to initiate with the parameters of main
	glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA | 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(); //Other setups you need
	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;
}