gluPwlCurve.3G - Man Page

void gluPwlCurve( GLUnurbs* nurb,

	GLint count,
	GLfloat* data,
	GLint stride,
	GLenum type )

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.

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.

gluBeginCurve(3G), gluBeginTrim(3G), gluNewNurbsRenderer(3G), gluNurbsCurve(3G)

gluBeginSurface.3G(3), gluBeginTrim.3G(3), gluNurbsCurve.3G(3), gluNurbsSurface.3G(3).