GPL

GDDM-GKS V1R1 Programming Guide and Reference

GPL

GDDM-GKS V1R1 Programming Guide and Reference
SC33-0334-00

Purpose


GPL	(n, px, py)

APL code	1313
GKS RCP code	X'38000C00' (939527168)

Function: To polyline.

Output function. Draws a sequence of connected straight lines between points.

Parameters

n (specified by user) (fullword integer)
The number of points.

px (specified by user) (array of short floating-point numbers)

py (specified by user) (array of short floating-point numbers)
The coordinates of the n points to be connected, in world coordinates.

Operating states

WSAC, SGOP

Related functions

Set linetype (GSLN), Set linewidth scale factor (GSLWSC), Set polyline color index (GSPLCI), Set polyline index (GSPLI), Set polyline representation (GSPLR), Set aspect source flags (GSASF)

Description

This function draws a sequence of connected straight lines, beginning with the first point and ending with the last point, given by the arrays px and py.

The current values of the polyline attributes, as given by the GKS state list, are bound to the polyline primitive.

If the line type is not solid, the line type starts at the start of the polyline and is not restarted at points in the polyline, or when clipping occurs.

Principal errors

5: GKS not in proper state: GKS shall be either in the state WSAC or in the state SGOP
100: Number of points is invalid

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