#include <stdio.h>
//#include <window.h>
#include <gl/glut.h>

GLfloat ctlarray[3][2][4] = { 0.5, 0.0, -0.5, 1.0, 0.5, 0.0, 0.5, 1.0,
0.0, 0.866*0.55, -0.5 * 0.55, 1.0*0.55, 0.0, 0.866*0.55, 0.5 * 0.55, 1.0 * 0.55, -0.5, 0.0, -0.5, 1.0, -0.5, 0.0, 0.5, 1.0 };

GLUnurbsObj *theNurb;
GLfloat texpt[2][2][2] = { 0, 0, 0, 1, 1, 0, 1, 1 };
GLUquadricObj* theqw;
GLubyte *Iz_RGB;

void file_read()
{
}

void init()
{
	glClearColor(0.1, 0.98, 0.3, 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);
	glTexImage2D(GL_TEXTURE_2D, 0, 3, 256, 256, 0, GL_RGB, GL_UNSIGNED_BYTE, Iz_RGB);
	glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
	gluQuadricTexture(theqw, true);
	glEnable(GL_TEXTURE_2D);
	free(Iz_RGB);
}

void Display()
{
	GLfloat knot[] = { 0.0, 0.0, 0.0, 1.0, 1.0, 1.0 };
	GLfloat knot1[] = { 0.0, 0.0, 1.0, 1.0 };
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
	glRotatef(1, 1.0, 1.0, 1.0);
	glColor3f(1, 0, 0);
	glMap2f(GL_MAP2_TEXTURE_COORD_2, 0, 1, 2, 2, 0, 1, 4, 2, &texpt[0][0][0]);
	glEnable(GL_MAP2_TEXTURE_COORD_2);

	gluSphere(theqw, 0.3, 50, 50);

	gluBeginSurface(theNurb);
	gluNurbsSurface(theNurb, 6, knot, 4, knot1, 2 * 4, 4, &ctlarray[0][0][0], 3, 2, GL_MAP2_VERTEX_4);
	gluEndSurface(theNurb);

	glutPostRedisplay();
	glutSwapBuffers();
}

void main()
{
	file_read();
	glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | GLUT_DEPTH);
	glutInitWindowSize(500, 500);
	glutCreateWindow("Task4");
	init();
	glutDisplayFunc(Display);
	glutMainLoop();
}