Graphics Options and Device Parameters Dictionary

PCLIP

Specifies whether a clipped polygon is stored in its clipped or unclipped form.

Used in:	GOPTIONS statement
Default:	NOPCLIP
Restriction:	not supported by Java or ActiveX
See also:	POLYGONCLIP

Syntax
Details

Syntax

PCLIP |NOPCLIP

PCLIP: stores clipped polygons with the graph in the default catalog WORK.GSEG, or in the catalog you specify.
NOPCLIP: stores the unclipped form of the polygon and causes the polygon to be clipped when replayed.

Details

The effects of this option are seen only when you use the graphics editor to edit a graph.

When a procedure produces a graph with intersecting polygons or blanking areas, it clips portions of the polygons to prevent the ones behind from showing through. When the graph is created and stored in a catalog, if PCLIP is in effect, the clipped form of the polygon is stored with it. If NOPCLIP is specified, the complete polygon is stored in the catalog and the graph is clipped each time it is replayed.

For example, suppose you create a block map like the one in Intersecting Polygons.

Intersecting Polygons

[Intersecting Polygons]

The block clips the boundary of the map area polygon. If you specify PCLIP, the map area polygon is stored in its clipped form, as shown in Clipped Polygon with PCLIP Option.

Clipped Polygon with PCLIP Option

[Clipped Polygon with PCLIP Option]

NOPCLIP stores the map area in its unclipped form, as shown in Polygon with NOPCLIP Option.

Polygon with NOPCLIP Option

[Polygon with NOPCLIP Option]

In this case, when the graph is recalled from the catalog, the map area polygon must be clipped before it is displayed with the block. If you plan to edit the graph with the graphics editor, specify NOPCLIP so polygons retain their original form.

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