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DCL:GRPH2:UEPACK: Tone Fill Routines: Explanation of Subroutines

9.2.5 UESTLV

1.

Function

Specifies the tone level and pattern for each level.

2.

Call

CALL UESTLV(TLEV1,TLEV2,IPAT)

3.

Explanation of Parameters

TLEV1	(R)	The minimum level of tone fill.
TLEV2	(R)	The maximum level of tone fill.
IPAT	(I)	The tone pattern index (see user's manual for "GRPH1").

4.

Notes

(a)

When you wish to fill all areas with values lower than a certain value (ZLEV),  set the value of TLEV1 to that of the internal variable 'RMISS' handled by GLpGET/GLpSET,  and set the value of TLEV2 to ZLEV. On the other hand, when you wish to fill all areas with values larger than a certain value (ZLEV), set the value of TLEV1 to ZLEV, and set TLEV2 to 'RMISS'.

(b)

Must be TLEV1>TLEV2.

(c)

The number of tone levels set must be less than 100.

(d)

The current number of tone levels can be inquired with

CALL UEQNTL(NTON).

(e)

The attributes of the (ITON)th tone level can be inquired with

CALL UEQTLV(TLEV1,TLEV2,IPAT,ITON).