# define M_PI           3.14159265358979323846  /* pi */
#define CNT 10

float k;
int width, height;
float vretices_4[CNT*3][3];
//float texCoord_2[] = {0,1, 1,1, 1,0, 0,0};
GLuint index_L_3[CNT*3*3+1][2];
void SAS(){
    float x,y;
    int v = CNT;
    float l = 0.30;
    float a = M_PI * 2 / CNT;
    for (int i = 0; i < CNT; i++){
        x = sin(a*i) * l;
        y = cos(a*i) * l;
        vretices_4[i][0] = x;
        vretices_4[i][1] = y;
        vretices_4[i][2] = 0;
    }
    l = 0.15;
    for (int i = 0; i < CNT; i++){
        x = sin(a*i) * l;
        y = cos(a*i) * l;
        vretices_4[v+i][0] = x;
        vretices_4[v+i][1] = y;
        vretices_4[v+i][2] = 0.6;
    }
    v = v + CNT;
    l = 0.2;
    for (int q = 0; q < CNT; q++){
        x = sin(a*q) * l;
        y = cos(a*q) * l;
        vretices_4[v+q][0] = x;
        vretices_4[v+q][1] = y;
        vretices_4[v+q][2] = 0.8;
    }
    v = v + CNT;
    vretices_4[v][0] = 0;
    vretices_4[v][1] = 0;
    vretices_4[v][2] = 0.9;
    v++;
    vretices_4[v][0] = 0;
    vretices_4[v][1] = 0;
    vretices_4[v][2] = 0;

    int i = 0, nnn;
    for (int m = 0;  m != 3;  m++){
        nnn = i;
        for (int b = 0; b <= CNT-2; i++, b++){
            index_L_3[i][0] = i;
            index_L_3[i][1] = i+1;
        }
        index_L_3[i][0] = i;
        index_L_3[i][1] = nnn;
        i++;
    }
    nnn = i;
    int M = i;
    i = 0;
    for (int b = 0; b <= CNT-1; i++, b++, nnn++){
        index_L_3[nnn][0] = i;
        index_L_3[nnn][1] = i+CNT;
        nnn++;
        index_L_3[nnn][0] = i;
        index_L_3[nnn][1] = M+1;
        nnn++;
        if (b != 0){
            index_L_3[nnn][0] = i;
            index_L_3[nnn][1] = i+CNT-1;
        }
        else{
            index_L_3[nnn][0] = i;
            index_L_3[nnn][1] = i+CNT+CNT-1;
        }
    }
    for (int b = 0; b <= CNT-1; i++, b++, nnn++){
        index_L_3[nnn][0] = i;
        index_L_3[nnn][1] = i+CNT;
        nnn++;
        index_L_3[nnn][1] = i+CNT;
        index_L_3[nnn][0] = M;
        nnn++;
        if (b != 0){
            index_L_3[nnn][0] = i;
            index_L_3[nnn][1] = i+CNT-1;
        }
        else{
            index_L_3[nnn][0] = i;
            index_L_3[nnn][1] = i+CNT+CNT-1;
        }
    }
    index_L_3[nnn][1] = M;
    index_L_3[nnn][0] = M+1;
}


unsigned int texsture_target;
/*
void glTexParam(){
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);// GL_CLAMP
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);// GL_REPEAT
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);// GL_NEAREST
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);// GL_LINEAR
}
*/
void render_figure_2(){
    glEnableClientState(GL_VERTEX_ARRAY);
    glVertexPointer(3, GL_FLOAT, 0 , &vretices_4);
    glDrawElements(GL_LINES, sizeof(index_L_3) / sizeof(index_L_3[0][0]), GL_UNSIGNED_INT, &index_L_3);
    //             GL_LINES GL_TRIANGLE_FAN
    glDisableClientState(GL_VERTEX_ARRAY);
}

//float i = 0, q = 0;
float i = 0;
/*
void render(void){
    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
    glutPostRedisplay();
    glPushMatrix();

    glColor3f(1,1,1);
    glLoadIdentity();
    glFrustum(-k,k, -1,1, 2, 50);

    glTranslatef(0,0,-3);
    glRotatef(q+=0.2,1,0,1);

    glLineWidth(2);
    glColor3f(0.1f,0.8f,0.0f);


    render_figure_2();

    glutSwapBuffers();
    glFlush();
    usleep(1000000/144);
}
*/
/*
void ChangeWindow(int width_l, int height_l){
    width = width_l;
    height = height_l;
    printf("width: %i width: %i\n", width, height);
    glViewport(0,0, width, height);
    glLoadIdentity();
    k = width / (float)height;
    glOrtho(-k,k, -1,1, -1,1);
}
int main(int argc, char** argv){
    SAS();
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_SINGLE);
    glutInitWindowSize(800, 800);
    glutInitWindowPosition(100, 100);
    glutCreateWindow("Hello world!");

    glutDisplayFunc(render);
    glutReshapeFunc(ChangeWindow);
    glutMainLoop();


    return 0;
}
*/