NAME

curve - draw parametric cubic curves

SYNOPSIS

C
curve(precision, basis, geom)
short precision;
Matrix basis;
Coord geom[4][3];

FORTRAN
subroutine curve(precis, basis, geom)
integer*2 precis
real basis(4,4), geom(3,4)

Pascal
procedure curve(precision: Short; var basis: Matrix;
var geom: Coord3array);

DESCRIPTION

A curve is defined by a basis matrix and a set of four guiding points.  The first argument, precision, specifies the number of line segments to be used in approximating the curve.  The curve is drawn in the current color, writemask, linewidth, and linestyle.  To achieve a continuous line style across the precision segments that approximate the curve, see resetls.  See Section 3.7 and Figure 3.4 in the IRIS Graphics Library for some sample curves, basis matrices, and guiding points. 

SEE ALSO

curveit, resetls

Version 2.3  —  July 04, 1985