sphrma man page on IRIX

sphrma man page on IRIX

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SPHRMA(3L)							    SPHRMA(3L)

NAME
     sphrma - orient spheres

FORTRAN 77 SPECIFICATION
     #include <gl/fsphere.h>

     subroutine sphrma(mat)
     real mat(4,4)

PARAMETERS
     mat    the rotation matrix to specify the orientation of the sphere

DESCRIPTION
     sphrma specifies the rotation matrix sphdra uses for displaying spheres
     with a fixed orientation when the sphere attribute, SPHORI, is TRUE.  The
     orientation of the sphere is applied by the Sphere Library before any
     scaling for radius or translation to the location sent to sphdra.	The
     matrix provided must be a pure rotation matrix  or the results will be
     unpredictable. When SPHORI is TRUE, the Sphere Library assumes uniform
     scaling; the effects of nonuniform scaling are undefined.

SEE ALSO
     libsphere, sphmod, sphobj, sphdra, sphgnp, sphfre

NOTE
     sphrma can be used to reduce lighting effects when rotating objects that
     contain spheres.  It can also be used on a VGX, in combination with the
     accumulation buffer, to antialias spheres. For performance, when SPHORI
     is TRUE, use the SPHHEM attribute to draw only the front-facing half of
     the sphere.

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