VARKON Version 1.15 1997-12-29

arc_offs - Geometric procedure

Creates an arc


Description

Creates a circular arc with the same origin as another arc but different radius. A positive value for offset creates an arc with larger radius and a negative value creates an arc with smaller radius.

Syntax

arc_offs(id, ref, offset:attributes);

REF	id;
REF	ref;
FLOAT	offset;

Principal parameters

id	- Local identity
ref	- Identity of original arc
offset	- Difference in radius

Optional parameters

None.

Attributes

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

Example

arc_offs(#2,#1,-1);

Creates a new arc #2 one unit smaller than an old arc #1.

Comments

In a 3D module the resulting arc is restricted to the XY-plane of the active coordinate system. If the original arc is not in this plane its origin is projected along the Z-axis onto the active XY-plane and used for the new arc. With offset = 0 this feature can be used to create multiple identical arcs in different parallel planes.