67 lines
1.8 KiB
Plaintext
67 lines
1.8 KiB
Plaintext
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'\" e
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'\"! eqn | mmdoc
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'\"macro stdmacro
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.ds Vn Version 1.2
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.ds Dt 6 March 1997
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.ds Re Release 1.2.0
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.ds Dp May 02 11:53
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.ds Dm 37 sphere.gl
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.ds Xs 36748 4 sphere.gl
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.TH GLUSPHERE 3G
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.SH NAME
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.B "gluSphere
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\- draw a sphere
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.SH C SPECIFICATION
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void \f3gluSphere\fP(
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GLUquadric* \fIquad\fP,
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.nf
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.ta \w'\f3void \fPgluSphere( 'u
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GLdouble \fIradius\fP,
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GLint \fIslices\fP,
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GLint \fIstacks\fP )
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.fi
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.EQ
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delim $$
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.EN
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.SH PARAMETERS
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.TP \w'\fIradius\fP\ \ 'u
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\f2quad\fP
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Specifies the quadrics object (created with \%\f3gluNewQuadric\fP).
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.TP
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\f2radius\fP
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Specifies the radius of the sphere.
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.TP
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\f2slices\fP
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Specifies the number of subdivisions around the \f2z\fP axis
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(similar to lines of longitude).
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.TP
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\f2stacks\fP
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Specifies the number of subdivisions along the \f2z\fP axis
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(similar to lines of latitude).
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.SH DESCRIPTION
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\%\f3gluSphere\fP draws a sphere of the given radius centered around the origin. The
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sphere is subdivided around the \f2z\fP axis into slices and along the
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\f2z\fP axis
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into stacks (similar to lines of longitude and latitude).
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.P
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If the orientation is set to \%\f3GLU_OUTSIDE\fP
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(with \%\f3gluQuadricOrientation\fP), then any normals generated
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point away from the center of the sphere.
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Otherwise, they point toward the center of the sphere.
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.P
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If texturing is turned on (with \%\f3gluQuadricTexture\fP), then texture
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coordinates are
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generated so that \f2t\fP ranges from 0.0 at $ z ~=~ -^"radius" $ to 1.0 at
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$ z ~=~ "radius" $ (\f2t\fP increases linearly along longitudinal
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lines),
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and \f2s\fP ranges from 0.0 at the +\f2y\fP axis, to 0.25 at the
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+\f2x\fP axis,
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to 0.5 at the \-\f2y\fP axis, to 0.75 at the \-\f2x\fP axis, and back to 1.0
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at the +\f2y\fP axis.
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.SH SEE ALSO
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\%\f3gluCylinder(3G)\fP, \%\f3gluDisk(3G)\fP, \%\f3gluNewQuadric(3G)\fP,
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\%\f3gluPartialDisk(3G)\fP, \%\f3gluQuadricOrientation(3G)\fP,
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\%\f3gluQuadricTexture(3G)\fP
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