float xRot = 0.0f;
float yRot = 0.0f;
float zRot = 0.0f;
float zTrans = -60.0f;
int boxList, texList;
unsigned char* Pixels;
GLuint texture;
GLuint width, height, imgSize;

static void display()
{
    static GLint s_v[4] = { 2, 0, 0, 0 };
    static GLint t_v[4] = { 0, 0, 2, 0 };
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glColor3f(0.0f, 0.0f, 1.0f);
    glPushMatrix();
    glTranslatef(0.0f, 0.0f, zTrans);
    glRotatef(xRot, 1.0f, 0.0f, 0.0f);
    glRotatef(yRot, 0.0f, 1.0f, 0.0f);
    glRotatef(zRot, 0.0f, 0.0f, 1.0f);
    glEnable(GL_TEXTURE_2D);
    glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
    glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
    glTexGeniv(GL_S, GL_OBJECT_PLANE, s_v);
    glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
    glTexGeniv(GL_T, GL_OBJECT_PLANE, t_v);
    glCallList(texList);
    glCallList(boxList);
    glDisable(GL_TEXTURE_2D);
    glPopMatrix();
    glFlush();
    glutSwapBuffers();
}
static void init()
{
    GLfloat box1[3][3] = {{ 500, 500, -500}, { 500, -500, -500}, { -500, -500, -500}};
    GLfloat box2[3][3] = {{ -500, 500, -500}, { -500, -500, -500}, { -500, -500, 500}};
    GLfloat box3[3][3] = {{ -500, 500, 500}, { -500, -500, 500}, { 500, -500, 500}};
    GLfloat box4[3][3] = {{ 500, 500, 500}, { 500, -500, 500}, { 500, -500, -500}};
    GLfloat normals[3];
    glColor3f(0.0f, 0.0f, 1.0f);
    glNewList(boxList = glGenLists(1), GL_COMPILE);
        glBegin(GL_QUADS);
            glFrontFace(GL_CW);
            calcNormal(box1, normals);
            glNormal3fv(normals);
            glVertex3fv(box1[0]);
            glVertex3fv(box1[1]);
            glVertex3fv(box1[2]);
            glVertex3fv(box2[0]);
            //do the same for the other boxes, box 4 uses a vertex from box1
        glEnd();
    glEndList();
}

int main()
{
    //setup glut window & callbacks

    glClearColor(0,0,0,1);
    glColor3f(0.0f, 1.0f, 0.0f);

    glEnable(GL_DEPTH_TEST);
    //glEnable(GL_LIGHTING);
    glEnable(GL_COLOR_MATERIAL);
    //glEnable(GL_CULL_FACE);
    //glCullFace(GL_BACK);
    glEnable(GL_TEXTURE_GEN_S);
    glEnable(GL_TEXTURE_GEN_T);

    GLfloat am[] = { 1.0, 1.0, 1.0, 1.0 };
    GLfloat df[] = { .4f, .4f, .4f };
    GLfloat pos[] = { -10.0f, -10.0f, -50.0f, 1.0f };

    glLightfv(GL_LIGHT0, GL_AMBIENT, am);
    glLightfv(GL_LIGHT0, GL_DIFFUSE, df);
    glLightfv(GL_LIGHT0, GL_POSITION, pos);
    glEnable(GL_LIGHT0);
    glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE);

    glNewList(texList = glGenLists(1), GL_COMPILE);
        texture = LoadBitmap("wood.bmp");
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
        glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_NEAREST );
        gluBuild2DMipmaps( GL_TEXTURE_2D, 3, width, height,GL_RGB, GL_UNSIGNED_BYTE, Pixels );
        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, Pixels);
    glEndList();

    init();

    glutMainLoop();

    delete[] Pixels;
    return EXIT_SUCCESS;
}
unsigned int LoadBitmap(string FilePath)
{
    unsigned char bitmapHeader[54];
    unsigned int pos, texID;
    glGenTextures(1, &texID);
    glBindTexture(GL_TEXTURE_2D, texID);
    FILE* fp = fopen(FilePath.c_str(), "rb");
    if(!fp)
    {
        cout << "Bad file\n";
        return NULL;
    }
    fread(bitmapHeader, 1, sizeof(bitmapHeader), fp);
    if(bitmapHeader[0] != 'B' || bitmapHeader[1] != 'M')
    {
        cout << "Not a bitmap\n";
        return NULL;
    }
    imgSize = *(int*)&(bitmapHeader[0x22]);
    pos = *(int*)&(bitmapHeader[0x0A]);
    width = *(int*)&(bitmapHeader[0x12]);
    height = *(int*)&(bitmapHeader[0x16]);
    if (imgSize == NULL)
        imgSize = width * height * 3;
    if (pos == NULL)
        pos = 54;
    if(Pixels)
        delete[] Pixels;
    else
        Pixels = new unsigned char[imgSize];
    fseek(fp, pos, SEEK_SET);
    fread(Pixels, 1, imgSize, fp);
    fclose(fp);
    return texID;
}