Glu.BeginCurve / Glu.EndCurve
Static Sub BeginCurve ( Nurb As GluNurb )
Delimit a NURBS curve definition.
Specifies the NURBS Objekti (created with Glu.NewNurbsRenderer).
to mark the beginning of a NURBS
, make one or more calls to
Glu.NurbsCurve to define the attributes of the curve.
Exactly one of the calls to Glu.NurbsCurve must have
a curve type of Glu.MAP1_VERTEX_3 or Glu.MAP1_VERTEX_4.
To mark the end of the NURBS curve definition, call Glu.EndCurve.
GL evaluators are used to render the NURBS curve as a series of line
Evaluator state is preserved during rendering
with Gl.PushAttrib(Glu.EVAL_BIT) and
See the Gl.PushAttrib reference page for details on exactly what state
these calls preserve.
The following commands render a textured NURBS curve with normals;
texture coordinates and normals are also specified as NURBS curves:
gluNurbsCurve(nobj, ..., GL_MAP1_TEXTURE_COORD_2);
gluNurbsCurve(nobj, ..., GL_MAP1_NORMAL);
gluNurbsCurve(nobj, ..., GL_MAP1_VERTEX_4);
See original documentation on OpenGL website