VARKON Version 1.15 1997-12-29

cur_iso - Geometric procedure

Creates a curve


Description

Creates a curve with a constant parameter value on a surface. Such a curve is called an iso-parametric curve.


Syntax

cur_iso(id, ref, uv_type, iso_v, s_v, e_v:attributes);

REF	id;
REF	ref;
STRING	uv_type;
FLOAT	iso_v;
FLOAT	s_v;
FLOAT	e_v;

Principal parameters

id	- Local identity
ref	- Surface
uv_type	- Type of iso-parameter curve (U or V)
iso_v	- Parameter value for the iso-parameter
s_v	- Curve start parameter value
s_e	- Curve end parameter value

Optional parameters

None

Attributes

PEN	- Pen or colour number
LEVEL	- Level number
BLANK	- Visible (0) or invisible (1)
CFONT	- Solid (0), dashed (1), center line (2)
CDASHL	- Dash length
WIDTH	- Linewidth

Example

cur_iso(#3, #2, "U", 4.1, 1.1, 6.7);

Creates a curve #3, which has the constant parameter value U= 4.1 on surface #2. The curve starts in V= 1.1 and ends in point V= 6.7.


Comments

It is not possible to create an iso-parametric curve with steps between curve segments. All curves in Varkon must be continuous in position.