график функции на OpenGL

#pragma comment(lib,"opengl32.lib")
#pragma comment(lib, "glu32.lib")
#pragma comment(lib, "glaux.lib")
#include <time.h>
#include <stdlib.h>
#include <windows.h>
#include <GL/gl.h>
#include <GL/glu.h>
#include <GL/glaux.h>
#include <cmath>
 
void CALLBACK resize(int width,int height)
{
    glViewport(0,0,width,height);
    glMatrixMode( GL_PROJECTION );
    glLoadIdentity();
    glOrtho(-11,11, -11,11, 2,12);   
    gluLookAt( 0,0,5, 0,0,0, 0,1,0 );
    glMatrixMode( GL_MODELVIEW );
}
void CALLBACK display(void)
{
    float x,y;
    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
    glLineWidth(1.0f);
    glColor3f(1.0f,1.0f,1.0f);
    glBegin(GL_LINES);
    glColor3f(1.0f,0.0f,0.0f);
    //ось Y
        glVertex2f(0.0f,10.0f);
        glVertex2f(0.0f,-10.0f);
    //ось X
        glVertex2f(10.0f,0.0f);
        glVertex2f(-10.0f,0.0f);
    glEnd();
    glPointSize(2);
    glBegin(GL_POINTS);
    glColor3f(0.0f,1.0f,0.0f);
        for(int i=-10;i<=10;i++)
        {
            x=i;
            y=sin(x);
            glVertex2f(x,y); 
        }
    glEnd();
    auxSwapBuffers();
}
 
int main()
{       
    float pos[4] = {3,3,3,1};
    float dir[3] = {-1,-1,-1};
    GLfloat mat_specular[] = {1,1,1,1};
 
    auxInitPosition( 425, 100, 500, 500);
    auxInitDisplayMode( AUX_RGB | AUX_DEPTH | AUX_DOUBLE );
    auxInitWindow((LPCWSTR)"Graph");
    auxIdleFunc(display);
    auxReshapeFunc(resize);
 
    glEnable(GL_DEPTH_TEST);
    glEnable(GL_COLOR_MATERIAL);
 
    glEnable(GL_LIGHTING);
    glEnable(GL_LIGHT0);
 
    glLightfv(GL_LIGHT0, GL_POSITION, pos);
    glLightfv(GL_LIGHT0, GL_SPOT_DIRECTION, dir);
 
    glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
    glMaterialf(GL_FRONT, GL_SHININESS, 128.0);
    // Enter your cod here
    auxMainLoop(display);
    return 0;
}