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gluBeginCurve.3gl
Langue: en
Version: 379040 (fedora - 01/12/10)
Section: 3 (Bibliothèques de fonctions)
NAME
gluBeginCurve, gluEndCurve - delimit a NURBS curve definitionC SPECIFICATION
void gluBeginCurve( GLUnurbs* nurb )void gluEndCurve( GLUnurbs* nurb )
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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)Contenus ©2006-2024 Benjamin Poulain
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