7. Draw a Bezier curve on the screen and smooth the curve with anti aliasing technology.

#define GLUT_DISABLE_ATEXIT_HACK

#include "windows.h"
#include <gl/glut.h>
#include "math.h"
/**  Array of control points  */
GLfloat points[4][3] = {
	   { -4.0f,  -2.0f,  0.0f }, { -2.0f,  3.0f,  2.0f},
	   {  2.0f,  -3.0f, -2.0f }, {  4.0f,  2.0f,  0.0f} };
// initialization OpenGL
void init(void)
{
	/**  User defined initialization process  */
	glClearColor(0.0f, 0.0f, 0.0f, 0.5f);
	glClearDepth(1.0f);
	glDepthFunc(GL_LEQUAL);
	glEnable(GL_DEPTH_TEST);
	glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);

	/** Enable and define a one-dimensional evaluator   */
	glEnable(GL_MAP1_VERTEX_3);
	glMap1f(GL_MAP1_VERTEX_3, 0.0, 1.0, 3, 4, &points[0][0]);
}
// The main drawing process 
void display(void)
{
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);// Clear color cache 
	glShadeModel(GL_FLAT);
	glLoadIdentity();
	glTranslatef(-1, 1, -7.0);
	// evaluation 
glEnable(GL_DEPTH_TEST);
	glEnable(GL_BLEND);

glEnable(GL_LINE_SMOOTH);       /**<  Enable straight line anti aliasing  */
					/**<  Enable hybrid  */
		glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); /**<  Specify mixing factor  */
		glHint(GL_LINE_SMOOTH_HINT, GL_NICEST);	/**<  behavior control  */

	glBegin(GL_LINE_STRIP);
	for (int i = 0; i < 100; i++)
	{
		/**  Perform the evaluation procedure  */
		glEvalCoord1f((float)i / 100.0f);
	}
	glEnd();
//	glMapGrid1f(100, 0.0, 1.0);
//	glEvalMesh1(GL_LINE, 0, 100);

// Draw control points 	
	glPointSize(4.0);
	glBegin(GL_POINTS);
	for (int j = 0; j < 4; j++)
		glVertex3fv(&points[j][0]);
	glEnd();

	glFlush();				      /**<  Enforce all OpenGL command  */
	glutSwapBuffers();
}
// Call when the window changes size 
void reshape(int w, int h) {
	glViewport(0, 0, w, h);// Set up the viewport 
	glMatrixMode(GL_PROJECTION);// Set the current projection transformation mode 
	glLoadIdentity();// Replace the current transformation matrix with the identity matrix 
	gluPerspective(90, (float)w / h, 4, 10.0);// Set the orthographic projection body 
	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();
	gluLookAt(0.0, 0.0, 4.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);
}

// Dealing with keyboards 
void keyboard(unsigned char key, int x, int y) {
	switch (key) {
	case 27://esc Key to exit 
		exit(0);
		break;
	default:
		break;
	}
}
int main(int argc, char* argv[])							// The main function :  The number of arguments & Parameter values 
{
	glutInit(&argc, argv);
	glutInitWindowSize(640, 480);
	glutCreateWindow("Basic");// Set the window title 
	init();// initialization OpenGL
	glutDisplayFunc(display);// Set display callback function  
	glutReshapeFunc(reshape);// Set up reshape Callback function 
	glutKeyboardFunc(keyboard);// Set the keyboard callback function 
	glutMainLoop();// Enter the main loop 	
}