polarview(3G)

NAME
     polarview - defines the viewer's position in polar coordinates

C SPECIFICATION
     void polarview(dist, azim, inc, twist)
     Coord dist;
     Angle azim, inc, twist;

PARAMETERS
     dist    expects the distance from the viewpoint to the world space
             origin.

     azim    expects the azimuthal angle in the x-y plane, measured from the y
             axis.  The azimuth angle is the viewing angle of the observer.

     inc     expects the angle of incidence in the y-z plane, measured from
             the z axis.  The incidence angle is the angle of the viewport
             relative to the z axis.

     twist   expects the amount that the viewpoint is to be rotated around the
             line of sight using the right-hand rule.

DESCRIPTION
     polarview defines the viewer's position in polar coordinates.  It sets up
     a right-hand world coordinate system with x to the right, y straight up,
     and z towards the viewer.  The line of sight extends from the viewpoint
     through the world space origin.  All angles are specified in tenths of
     degrees and are integers.

     The matrix computed by polarview premultiplies the current matrix, as
     specified by mmode.  polarview is typically called only while mmode is
     either MSINGLE or MVIEWING.

SEE ALSO
     mmode, lookat