gluPwlCurve -- describe a piecewise linear NURBS trimming curve
void gluPwlCurve(GLUnurbsObj *nobj,
Specifies the NURBS object (created with
Specifies 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
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.
To describe a trim curve which closely follows the contours of a NURBS surface
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© 1995 Uwe Behrens All rights reserved