polarview(3G)							 polarview(3G)

NAME    [Toc]    [Back]

     polarview - defines the viewer's position in polar	coordinates

C SPECIFICATION    [Toc]    [Back]

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

PARAMETERS    [Toc]    [Back]

     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    [Toc]    [Back]

     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    [Toc]    [Back]

     mmode, lookat


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