gluPwlCurve(3G)		       OpenGL Reference		       gluPwlCurve(3G)



NAME
     gluPwlCurve - describe a piecewise	linear NURBS trimming curve


C SPECIFICATION
     void gluPwlCurve( GLUnurbs* nurb,
		       GLint count,
		       GLfloat*	data,
		       GLint stride,
		       GLenum type )


PARAMETERS
     nurb    Specifies the NURBS object	(created with gluNewNurbsRenderer).

     count   Specifies the number of points on the curve.

     data    Specifies an array	containing the curve points.

     stride  Specifies the offset (a number of single-precision	floating-point
	     values) between points on the curve.

     type    Specifies the type	of curve.  Must	be either GLU_MAP1_TRIM_2 or
	     GLU_MAP1_TRIM_3.


DESCRIPTION
     gluPwlCurve describes a piecewise linear trimming curve for a NURBS
     surface.  A piecewise linear curve	consists of a list of coordinates of
     points in the parameter space for the NURBS surface to be trimmed.	 These
     points are	connected with line segments to	form a curve.  If the curve is
     an	approximation to a curve which is not piecewise	linear,	the points
     should be close enough in parameter space that the	resulting path appears
     curved at the resolution used in the application.

     If	type is	GLU_MAP1_TRIM_2, then it describes a curve in two-dimensional
     (u	and v) parameter space.	 If it is GLU_MAP1_TRIM_3, then	it describes a
     curve in two-dimensional homogeneous (u, v, and w)	parameter space.
     Please refer to the  gluBeginTrim reference page for more information
     about trimming curves.


NOTES
     To	describe a trim	curve which closely follows the	contours of a Nurbs
     surface use gluNurbsCurve.



SEE ALSO
     gluBeginCurve, gluBeginTrim, gluNewNurbsRenderer, gluNurbsCurve





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