#include <GL\glut.h>

GLfloat ctlarray [6][2][4] =  { 0.0, 0.3, 0.2, 1,
								0.0, 0.3, -0.2,1,

0.1, -0.3, 0.2, 1,
0.1, -0.3,-0.2,1,

0.2, 0.3, 0.2, 1,
0.2, 0.3,-0.2,1,

0.3, -0.3, 0.2, 1,
0.3, -0.3,-0.2,1,

0.4, 0.3, 0.2, 1,
0.4, 0.3,-0.2, 1,


0.5, -0.3, 0.2, 1,
0.5, -0.3,-0.2,1
};
GLfloat TexP[] = { 1.0, 0.0, 0.0, 0.0 };
GLfloat TexP1[] = { 0.0, 1.0, 0.0, 0.0 };
GLfloat TexP2[] = { 0.0, 0.0, 1.0, 0.0 };
GLubyte TexI[] = { 255, 0, 0, 
				   0, 255, 0, 
				   255, 0, 0, 
				   0, 255, 0, 
				   0, 255, 0, 
				   0, 255, 0, 
				   0, 255, 0,
					0, 255, 0};
GLfloat texpts[2][2][2] = { 0, 0, 0, 2, 2, 0, 2, 2 } ;
GLUnurbsObj* theNurb;
GLUquadricObj* theqw;
void init() {
	glClearColor (0.5, 0.75, 0.75, 1);
	theNurb = gluNewNurbsRenderer();
	theqw = gluNewQuadric();
	glEnable(GL_DEPTH_TEST);
	gluNurbsProperty(theNurb, GLU_SAMPLING_TOLERANCE, 25.0);
	glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
	glTexParameterf(GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
	glTexParameterf(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
	glTexImage1D(GL_TEXTURE_1D, 0, 3, 8, 0, GL_RGB, GL_UNSIGNED_BYTE, TexI);
	glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
	//gluQuadricTexture(theqw, true);
	glEnable(GL_TEXTURE_1D);
}	

void Display() {
	GLfloat knot[] = { 0.0, 0.0, 0.0, 0.0, 0.0, 1.0, 2.0, 2.0, 2.0, 2.0, 2.0 };
	GLfloat knot1[] = { 0.0, 0.0, 1.0 ,1.0};
	glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
	glRotatef (0.1, 1.0, 1.0, 1.0);
	glColor3f (1, 0, 0);
	glEnable (GL_TEXTURE_GEN_S);
	glTexGeni (GL_S, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
	glTexGenfv (GL_S, GL_OBJECT_PLANE, TexP1);
	//glMap2f (GL_MAP2_TEXTURE_COORD_1, 0, 1, 2, 2, 0, 1, 4, 2, &texpts[0][0][0]);
	//glEnable (GL_MAP2_TEXTURE_COORD_1);
	//gluSphere (theqw, 0.3, 50, 50);
	//glutSolidTeapot (0.3);
	gluBeginSurface (theNurb);
	gluNurbsSurface (theNurb, 11, knot, 4, knot1, 2 * 4, 4, &ctlarray[0][0][0], 5, 2, GL_MAP2_VERTEX_4);
	gluEndSurface (theNurb);
	glutPostRedisplay ();
	glutSwapBuffers();
}

void main() {
	glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | GLUT_DEPTH);
    glutInitWindowSize(480, 480);
    glutInitWindowPosition(100, 100);
    glutCreateWindow(" ");
    init();
    glutDisplayFunc(Display);
    glutMainLoop();
}