To Next Page

To Previous Page

gluPwlCurve

Chapter 14

361

gluPwlCurve

gluPwlCurve: describe a piece-wise 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 piece-wise linear trimming curve for a NURBS surface. A

piece-wise 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 piece-wise 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.

HP b2600 Reference Guide

Other manuals for HP b2600