gluNurbsCallback: define a callback for a NURBS object.
C Specification |
gluNurbsCallback is used to define a callback to be used by a NURBS
object. If the specified callback is already defined, then it is replaced. If
CallBackFunc is NULL, then any existing callback is
- Specifies the NURBS object (created with gluNewNurbsRenderer).
- Specifies the callback being defined. The only valid value is
- Specifies the function that the callback calls.
The one legal callback is GLU_ERROR:
- The error function is called when an error is encountered. Its single
argument is of type GLenum, and it indicates the specific error that
occurred. There are 37 errors unique to NURBS named
GLU_NURBS_ERROR37. Character strings describing these
errors can be retrieved with gluErrorString.