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- '\" e
- '\"! eqn | mmdoc
- '\"macro stdmacro
- .ds Vn Version 1.2
- .ds Dt 6 March 1997
- .ds Re Release 1.2.0
- .ds Dp May 02 11:53
- .ds Dm 37 disk.gl -
- .ds Xs 8360 4 disk.gl
- .TH GLUDISK 3G
- .SH NAME
- .B "gluDisk
- \- draw a disk
- .SH C SPECIFICATION
- void \f3gluDisk\fP(
- GLUquadric* \fIquad\fP,
- .nf
- .ta \w'\f3void \fPgluDisk( 'u
- GLdouble \fIinner\fP,
- GLdouble \fIouter\fP,
- GLint \fIslices\fP,
- GLint \fIloops\fP )
- .fi
- .EQ
- delim $$
- .EN
- .SH PARAMETERS
- .TP \w'\fIslices\fP\ \ 'u
- \f2quad\fP
- Specifies the quadrics object (created with \%\f3gluNewQuadric\fP).
- .TP
- \f2inner\fP
- Specifies the inner radius of the disk (may be 0).
- .TP
- \f2outer\fP
- Specifies the outer radius of the disk.
- .TP
- \f2slices\fP
- Specifies the number of subdivisions around the \f2z\fP axis.
- .TP
- \f2loops\fP
- Specifies the number of concentric rings about the origin into which
- the disk is subdivided.
- .SH DESCRIPTION
- \%\f3gluDisk\fP renders a disk on the \f2z\fP = 0 plane. The disk has a radius of
- \f2outer\fP, and contains a concentric circular hole with a radius
- of \f2inner\fP. If \f2inner\fP is 0, then no hole is generated. The disk is
- subdivided around the \f2z\fP axis into slices (like pizza slices), and also
- about the \f2z\fP axis into rings
- (as specified by \f2slices\fP and \f2loops\fP, respectively).
- .P
- With respect to orientation, the +\f2z\fP side of the disk is considered to be
- "outside" (see \%\f3gluQuadricOrientation\fP).
- This means that if the
- orientation is set to \%\f3GLU_OUTSIDE\fP, then any normals generated
- point along the +\f2z\fP axis. Otherwise, they point along the \-\f2z\fP
- axis.
- .P
- If texturing has been turned on (with \%\f3gluQuadricTexture\fP),
- texture coordinates are generated
- linearly such that where $ r ~=~ "outer" $, the value at (\f2r\fP, 0, 0) is
- (1, 0.5), at (0, \f2r\fP, 0) it is (0.5, 1), at (\-\f2r\fP, 0, 0)
- it is (0, 0.5), and
- at (0, \-\f2r\fP, 0) it is (0.5, 0).
- .SH SEE ALSO
- \%\f3gluCylinder(3G)\fP, \%\f3gluNewQuadric(3G)\fP, \%\f3gluPartialDisk(3G)\fP,
- \%\f3gluQuadricOrientation(3G)\fP,
- \%\f3gluQuadricTexture(3G)\fP, \%\f3gluSphere(3G)\fP
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