VARKON Version 1.15 1997-12-29

cur_conarr - Geometric procedure

Creates a curve


Description

Creates a rational cubic parametric segmented curve that interpolates two or more defining positions and tangent positions. This routine does the same job as cur_conic but takes its input in a more sutiable for applications with large or varying number of defining positions. See cur_conic for more information.

Syntax

cur_conarr(id, type, npos, p, tp, mpflag, pval, midp:attributes);

REF	id;
STRING	type*4;
INT	npos;
VECTOR	p(npos);
VECTOR	tp(npos);
STRING	mpflag(npos-1)*1;
FLOAT	pval(npos-1);
VECTOR	midp(npos-1);

Principal parameters

id	- Local identity
type	- The string "FREE" or "PROJ"
npos	- Number of defining positions
p	- Array with npos positions
tp	- Array with npos tangent positions
mpflag	- Array with "P":s or "M":s indicating P-value or Midpoint method
pval	- Array with P-values
midp	- Array with Midpoints

Optional parameters

None.

Attributes

PEN	- Pen or colour number
LEVEL	- Level number
BLANK	- Visible(0) or invisible(1)
CFONT	- Solid(0), dashed(1) or centerline(2)
CDASHL	- Dashlength
WIDTH	- Linewidth

Comments

If an element of mpflag is "P" the the corresponding element of pval must be a valid P-value. For elements in mpflag that are "M" the corresponding element of midp must also be valid.