cur_splarr - Geometric procedure

Creates a curve
 

Description

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

Syntax

cur_splarr(id, type, npos, p, t:attributes);

REF	id;
STRING	type*4;
INT	npos;
VECTOR	p(npos);
VECTOR	t(npos);

Principal parameters

id	- Local identity
type	- The string "FERGUSON", "CHORD" or "STIFFNESS"
npos	- Number of defining positions
p	- Array with npos positions

Optional parameters

t	- Array with npos tangents.

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 the optional array of tangents is supplied as input all npos elements of the array must have valid values. Avalue of X=Y=Z=0 imples "tangent not defined". Such tangents will be calculated (splined) by the system.

For more details, see cur_spline().