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gluPwlCurve()							 gluPwlCurve()

       gluPwlCurve - describe a piecewise linear NURBS trimming curve

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

       Specifies the NURBS object (created with gluNewNurbsRenderer()).	 Spec‐
       ifies the number of points on the curve.	 Specifies an array containing
       the  curve  points.  Specifies the offset (a number of single-precision
       floating-point values) between points on the curve.  Specifies the type
       of curve. Must be either GLU_MAP1_TRIM_2 or GLU_MAP1_TRIM_3.

       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 that 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-dimen‐
       sional (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) parame‐
       ter space. See the gluBeginTrim() reference page for  more  information
       about trimming curves.

       To  describe  a trim curve that closely follows the contours of a NURBS
       surface, call gluNurbsCurve().

       gluBeginCurve(3),  gluBeginTrim(3),  gluNewNurbsRenderer(3),   gluNurb‐


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