, gluLookAt(). - OpenGL 2.1 :
eyeX, eyeY, eyeZ:
World coordinates of camera location
centerX, centerY, centerZ:
World coordinates of camera aimpoint (what it looking at).
This point will be in the center of the resulting image, assuming
that it lies between the near & far clip planes.
upX, upY, upZ:
A vector (preferrably orthogonal to the line of sight) that specifies the
roll orientation of the camera (that is, which way is "up" in the image).
, , .
, (0, 0, -1), , , gluLookAt .