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

2.7.3 SGSPMT

1.

Function

Sets the marker type drawn by SGPMU, SGPMV, and SGPMR.

2.

Call

CALL SGSPMT(ITYPE)

3.

Explanation of Parameters

ITYPE

(I)

Marker type (Initial value is 1.) Draws the character corresponding to the DCL character number such as ITYPE 1: '.'; 2: '+'; 3: '*'; and 4: 'o'. (See Sections 2.12 & 8.1.2, and Font Table in Section 8.1.3.) When ITYPE = 152, the 'alpha' symbol is drawn.

4.

Notes

(a)

ITYPE must have a value besides 0. When ITYPE is 0, a message will be printed, and no other steps will be taken.

(b)

The validity of ITYPE is not checked in this routine. It is checked when SGPMU,SGPMV, or SGPMR is called.

(c)

The current marker type can be inquired by

CALL SGQPMT(ITYPE).