VARKON Version 1.15 1997-10-24

xhatch - Geometric procedure

Creates hatching


Description

Hatches an area bounded by lines, arcs or curves optionally with interior holes or islands.

Syntax

xhatch(id, dist, angle, ref1, refn:attributes);

REF	id;
FLOAT	dist;
FLOAT	angle;
REF	ref1;
REF	refn;

Principal parameters

id	- Local identity
dist	- Distance between hatchlines
angle	- Anticlockwise angle between hatchlines and positive X-axis
ref1	- Identity of first line, arc or curve in boundary

Optional parameters

refn	- Identity of additional entities in exterior or interior boundary

Attributes

PEN	- Pen or colour number
LEVEL	- Level number
BLANK	- Visible(0) or invisible(1)
XFONT	- Solid(0), dashed(1) or centerline(2)
XDASHL	- Dashlength

Example

xhatch(#10,2,45,#2,#5,#3,#6);

Hatches an area bounded by #2,#5,#3 and #6 with parallel lines 2 units apart at 45 degrees of angle.

Comments

Referenced entities can be specified in any order of choice but must form one or more well defined boundaries where all entities in each boundary are connected in their endpoints. If more than one boundary is defined one of them must enclose all the other. Boundaries should not cross or touch each other.