gluBeginCurve - delimit a NURBS curve definition
void gluBeginCurve( | GLUnurbs* | nurb) ; |
Use gluBeginCurve
to mark the beginning of a NURBS curve definition. After
calling gluBeginCurve
, make one or more calls to
gluNurbsCurve to define the attributes of the curve.
Exactly one of the calls to gluNurbsCurve 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 gluEndCurve.
GL-like evaluators are used to render the NURBS curve as a series of line segments.
The following commands render a textured NURBS curve with normals; texture coordinates and normals are also specified as NURBS curves:
gluBeginCurve(nobj); gluNurbsCurve(nobj, ..., GLU_MAP1_TEXTURE_COORD_2); gluNurbsCurve(nobj, ..., GLU_MAP1_NORMAL); gluNurbsCurve(nobj, ..., GLU_MAP1_VERTEX_4); gluEndCurve(nobj);
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