GLUPWLCURVE(3G) OpenGL Manual 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 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-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. See the gluBeginTrim() reference page for more information
about trimming curves.
NOTES
To describe a trim curve that closely follows the contours of a NURBS surface, call gluNurbsCurve().
SEE ALSO
gluBeginCurve(), gluBeginTrim(), gluNewNurbsRenderer(), gluNurbsCurve()
COPYRIGHT
Copyright (C) 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see
http://oss.sgi.com/projects/FreeB/.
AUTHORS
opengl.org
opengl.org 06/10/2014 GLUPWLCURVE(3G)