
plw3d: Set up window for 3-d plotting 

DESCRIPTION:

    This function is examples 8,11,18,21. 

SYNOPSIS:

plw3d(basex, basey, height, xmin, xmax, ymin, ymax, zmin, zmax, alt, az)

ARGUMENTS:

    basex (PLFLT, input) :    The x coordinate size of the
    world-coordinate box. 

    basey (PLFLT, input) :    The y coordinate size of the
    world-coordinate box. 

    height (PLFLT, input) :    The z coordinate size of the
    world-coordinate box. 

    xmin (PLFLT, input) :    The minimum user x coordinate value. 

    xmax (PLFLT, input) :    The maximum user x coordinate value. 

    ymin (PLFLT, input) :    The minimum user y coordinate value. 

    ymax (PLFLT, input) :    The maximum user y coordinate value. 

    zmin (PLFLT, input) :    The minimum user z coordinate value. 

    zmax (PLFLT, input) :    The maximum user z coordinate value. 

    alt (PLFLT, input) :    The viewing altitude in degrees above the XY
    plane. 

    az (PLFLT, input) :    The viewing azimuth in degrees.  When az=0, the
    observer is looking face onto the ZX plane, and as az is
    increased, the observer moves clockwise around the box when viewed
    from above the XY plane. 
