Glunurbscurve - HP b2600 Reference Manual

gluNurbsCurve

gluNurbsCurve: define the shape of a NURBS curve.
C Specification
void gluNurbsCurve(
Parameters
nurb
knotCount
knots
stride
control
order
type
Description
Use gluNurbsCurve to describe a NURBS curve.
When gluNurbsCurve appears between a gluBeginCurve/gluEndCurve pair, it is used to
describe a curve to be rendered. Positional, texture, and color coordinates are associated
by presenting each as a separate gluNurbsCurve between a
gluBeginCurve/gluEndCurve pair. No more than one call to gluNurbsCurve for each of
color, position, and texture data can be made within a single
gluBeginCurve/gluEndCurve pair. Exactly one call must be made to describe the position
of the curve (a type of GL_MAP1_VERTEX_3 or GL_MAP1_VERTEX_4).
Chapter 12
GLUnurbs* nurb,
GLint knotCount,
GLfloat *knots,
GLint stride,
GLfloat *control,
GLint order,
GLenum type)
Specifies the NURBS object (created with gluNewNurbsRenderer).
Specifies the number of knots in knots. knotCount equals the number
of control points plus the order.
Specifies an array of knotCount non-decreasing knot values.
Specifies the offset (as a number of single-precision floating-point
values) between successive curve control points.
Specifies a pointer to an array of control points. The coordinates must
agree with type, specified below.
Specifies the order of the NURBS curve. order equals degree + 1, hence
a cubic curve has an order of 4.
Specifies the type of the curve. If this curve is defined within a
gluBeginCurve/gluEndCurve pair, then the type can be any of the valid
one-dimensional evaluator types (such as GL_MAP1_VERTEX_3 or
GL_MAP1_COLOR_4). Between a gluBeginCurve/gluEndCurve pair,
the only valid types are GLU_MAP1_TRIM_2 and
GLU_MAP1_TRIM_3.
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gluNurbsCurve
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