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DCL:GRPH1:SGPACK: User Interface:Explanation of Subroutines: Arrow Primitives

2.11.4 SGSLAI

1.

Function

Sets the line index for a line segment drawn by SGLAU, SGLAV, and SGLAR.

2.

Call

CALL SGSLAI(INDEX)

3.

Explanation of Parameters

INDEX

(I)

The line index of a line segment. (See Section 1.7. Initial value is 1.)

4.

Notes

(a)

INDEX must be larger than 1. When INDEX is 0, a message is printed, and no other steps are taken.

(b)

The validity of INDEX is not checked in this routine. It is checked when SGLAU, SGLAV, or SGLAR is called.

(c)

The current line index can be inquired by

CALL SGQLAI(INDEX).