SYNOPSIS:
    camera: Eccet uses cameras to specify where views look from.

DESCRIPTION:
    Eccet can display multiple views (see there, basically they
    correspond to windows on your desktop) simultaneously.

    Sometimes it is useful, if views are "coupled" with respect to
    their "point of view". The classical exaple is the CAD-like
    axial/sagittal/coronar 2d view sets.
    These views are couples so that you always see 3 views that
    intersect at a given point.
    This point is the "camera".
    As you can see, the camera only specifies, where you look _from_,
    but not, where you look _at_.
    Another example is the "rearview mirror" setup that e.g. colotux
    uses. Whenever you move one view, the corresponding "rearview"
    will also be updated.

SEE ALSO:
    coordinate, VIEW_CAMERA_JOIN, VIEW_CAMERA_SPLIT
