glupwlcurve(3G) — IRIX 6.5.3f



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 GLUMAP1TRIM2 or
             GLUMAP1TRIM3.


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 GLUMAP1TRIM2, then it describes a curve in two-dimensional
     (u and v) parameter space.  If it is GLUMAP1TRIM3, 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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