#include "pch.h"
#include <stdio.h>
#include <windows.h>
#include <string>
#include "glut.h"

GLfloat TexP1[] = { 0,1,0,0 };
GLfloat TexP2[] = { 0,0,1,0 };
GLubyte TexI[] =
{ 255,0,0,
255,0,0,
255,255,0,
255,255,0,
0,255,0,
0,255,0,
0,0,255,
0,0,255
};
GLfloat texpts[2][2][2] = { 0,0,0,2,2,0,2,2 };
GLUnurbsObj* theNurb;
GLUquadricObj* theqw;

// массив точек определяющего многоугольника
GLfloat pts1[10][4] = {
	{1, 0.866, -0.3, 1},
	{1, 0.866, 0.3, 1},
	{ 0.5, 0.0, -0.3, 1 },
	{ 0.5,0.0,0.3,1 },
	{ 0.0,0.866,-0.3,1 },
	{ 0.0, 0.866, 0.3, 1 },
	{ -0.5,0.0,-0.3,1 },
	{ -0.5,0.0,0.3,1 },
	{-1, 0.866, -0.3, 1},
	{-1, 0.866, 0.3, 1},
};

void init(void)
{
	glClearColor(0.5, 0.75, 0.75, 1);
	theNurb = gluNewNurbsRenderer();
	theqw = gluNewQuadric();
	glEnable(GL_DEPTH_TEST);
	gluNurbsProperty(theNurb, GLU_SAMPLING_TOLERANCE, 25);
	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[8] = { 0.0,0.0,0.0,1.0, 2.0,3.0, 3.0, 3.0};
	GLfloat knot1[4] = { 0,0,1,1 };
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
	glRotatef(0.01, 1, 1, 1);
	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);
	GLfloat temp[10][4];
		for (int j = 0; j < 10; ++j) {
			for (int z = 0; z < 4; ++z) {
				temp[j][z] = pts1[j][z];
				if (j == 2 || j == 3) {
					temp[j][z] = pts1[j][z] * 1;
				}
			}
		};
	gluBeginSurface(theNurb);
	gluNurbsSurface(theNurb, 8, knot, 4, knot1, 2 * 4, 4, &temp[0][0], 3, 2, GL_MAP2_VERTEX_4);
	//glFlush();
	glutPostRedisplay();
	glutSwapBuffers();
}
void main()
{
	glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | GLUT_DEPTH);
	glutInitWindowSize(480, 480);
	glutInitWindowPosition(100, 100);
	glutCreateWindow("  ");
	init();
	glutDisplayFunc(Display);
	glutMainLoop();
}