+ GLfloat eyep[3], lookp[3], up[3];
+ eyep[0] = -nx/2; eyep[1] = 0; eyep[2] = -ny/2;
+ lookp[1] = 0; lookp[1] = 0, lookp[2] = 0;
+ up[0] = 0; up[1] = 1; up[2] = 0;
+ //gluLookAt (eyep[0], eyep[1], eyep[2], lookp[0], lookp[1], lookp[2], up[0], up[1], up[2]);