Drawing in OpenGL with a Simple Light Souce and Perspective

The following code involves the following techniques:

1. Drawing a solid cube.

2. Basic 3D transformations: rotation and translation.

3. Ambient light source.

4. Perspective viewport.

#ifdef WIN32
	#include <windows.h>
#endif
#include <glut.h>

void Initialize(void);
void Display(void);
void Keyboard (unsigned char key, int x, int y);
void DrawSolidCube(void);

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd)
{
	Initialize();
	glutMainLoop();
	return 0;
}

void Initialize(void)
{
	int argc;
	char * argv[] = {"dummy",0};
	argc = 1;
	glutInit(&argc, (char **)&argv[0]);
	glutInitDisplayMode(GLUT_RGB|GLUT_DOUBLE|GLUT_DEPTH|GLUT_ALPHA);
	glutInitWindowSize(300, 300);
	glutInitWindowPosition(-1, -1); // Let window to determine the startup position
	glutCreateWindow("A Simple Cube");
	glClearColor(1.0f, 1.0f, 1.0f, 0.0f); // Sets the background color - R, G, B,    and alpha
	glShadeModel(GL_SMOOTH); // One of GL_SMOOTH or GL_FLAT
	glEnable(GL_LIGHT0); // Enable a single light source
	glColorMaterial(GL_FRONT,GL_AMBIENT); // Makes the coloring work for basic primitives
	glutDisplayFunc(Display); // Register Display() function
	glutKeyboardFunc(Keyboard); // Register Keyboard() function
}

void Keyboard (unsigned char key, int x, int y)
{ 
	// Keyboard events can be intepreted here with a switch-case structure
	//glutPostRedisplay();
}

void Display(void)
{
	glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	glOrtho(-2.0,2.0,-2.0,2.0,2.0,-2.0);
	gluPerspective(30,1,1,20);
	glTranslatef(0,0,-3);
	glEnable(GL_DEPTH_TEST);
	glEnable(GL_LIGHTING);
	glEnable(GL_COLOR_MATERIAL);
	DrawSolidCube();
	glutSwapBuffers(); // swap the display buffer to show the new results
}

void DrawSolidCube(void)
{
	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();
	glPushMatrix();
	glColor4f(0,0,0.8f,1); // sets the color
	glRotatef(30,0.2,0.2,0); // rotate it for a 3D view
	glutSolidCube(1.5); // parameter is the length of each edge
	glPopMatrix();
}