describe a piecewise linear NURBS trimming curve
void gluPwlCurve( | GLUnurbs* | nurb, |
| GLint | count, | |
| GLfloat* | data, | |
| GLint | stride, | |
| GLenum | type); |
nurbSpecifies the NURBS object (created with gluNewNurbsRenderer).
countSpecifies the number of points on the curve.
dataSpecifies an array containing the curve points.
strideSpecifies 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.
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.
To describe a trim curve that closely follows the contours of a NURBS surface, call gluNurbsCurve.
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