OpenGL man pages
gluLookAt - define a viewing transformation
void gluLookAt( GLdouble eyex,
GLdouble upz )
eyex, eyey, eyez
Specifies the position of the eye point.
centerx, centery, centerz
Specifies the position of the reference point.
upx, upy, upz Specifies the direction of the up vector.
gluLookAt creates a viewing matrix derived from an eye point, a reference
point indicating the center of the scene, and an up vector. The matrix
maps the reference point to the negative z axis and the eye point to the
origin, so that, when a typical projection matrix is used, the center of
the scene maps to the center of the viewport. Similarly, the direction
described by the up vector projected onto the viewing plane is mapped to
the positive y axis so that it points upward in the viewport. The up
vector must not be parallel to the line of sight from the eye to the
The matrix generated by gluLookAt postmultiplies the current matrix.
Fri Dec 6 11:18:03 EST 1996
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