1991-2006
Silicon Graphics, Inc.
gluQuadricCallback
3G

# gluQuadricCallback

define a callback for a quadrics object

## C Specification

                    void gluQuadricCallback
                    GLUquadric* quad
                    GLenum which
                    _GLUfuncptr CallBackFunc

## Parameters

`quad`

  Specifies the quadrics object (created with gluNewQuadric).

`which`

  Specifies the callback being defined. The only valid value is `GLU_ERROR`.

`CallBackFunc`

  Specifies the function to be called.

## Description

`gluQuadricCallback` is used to define a new callback to be used by a quadrics object. If the specified callback is already defined, then it is replaced. If `CallBackFunc` is NULL, then any existing callback is erased.

The one legal callback is `GLU_ERROR`:

`GLU_ERROR`

  The function is called when an error is encountered. Its single argument is of type GLenum, and it indicates the specific error that occurred. Character strings describing these errors can be retrieved with the gluErrorString call.

## See Also

gluErrorString, gluNewQuadric

## Copyright

Copyright 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.