MirOS Manual: gluBeginCurve(3), gluEndCurve(3)


GLUBEGINCURVE(3G)   UNIX Programmer's Manual    GLUBEGINCURVE(3G)

NAME

     gluBeginCurve, gluEndCurve - delimit a NURBS curve defini-
     tion

C SPECIFICATION

     void gluBeginCurve( GLUnurbs* nurb )

     void gluEndCurve( GLUnurbs* nurb )

PARAMETERS

     nurb  Specifies the NURBS object (created with
           gluNewNurbsRenderer).

DESCRIPTION

     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 GL_MAP1_VERTEX_3 or GL_MAP1_VERTEX_4. To mark
     the end of the NURBS curve definition, call gluEndCurve.

     GL evaluators are used to render the NURBS curve as a series
     of line segments. Evaluator state is preserved during
     rendering with glPushAttrib(GL_EVAL_BIT) and glPopAttrib().
     See the glPushAttrib reference page for details on exactly
     what state these calls preserve.

EXAMPLE

     The following commands render a textured NURBS curve with
     normals; texture coordinates and normals are also specified
     as NURBS curves:

     gluBeginCurve(nobj);
        gluNurbsCurve(nobj, ..., GL_MAP1_TEXTURE_COORD_2);
        gluNurbsCurve(nobj, ..., GL_MAP1_NORMAL);
        gluNurbsCurve(nobj, ..., GL_MAP1_VERTEX_4);
     gluEndCurve(nobj);

SEE ALSO

     gluBeginSurface(3G), gluBeginTrim(3G),
     gluNewNurbsRenderer(3G), gluNurbsCurve(3G), glPopAttrib(3G),
     glPushAttrib(3G)

MirOS BSD #10-current  Printed 09.04.2016                       1

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