GQNT

GDDM-GKS V1R1 Programming Guide and Reference

GQNT

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

Purpose


GQNT	(ntnr, errind, window, viewpt)

APL code	1463
GKS RCP code	X'3800A400' (939566080)

Function: To inquire normalization transformation.

Inquiry function. Returns the window and viewport limits of a specified normalization transformation, from the GKS state list.

Parameters

ntnr (specified by user) (fullword integer)
The number of the normalization transformation requested.

errind (returned by GDDM) (fullword integer)
The error indicator

window (returned by GDDM) (array of short floating-point numbers)
The window limits, in world coordinates, of the normalization transformation given by ntnr. Four floating-point numbers are returned in the array: WXMIN, WXMAX, WYMIN, WYMAX.

viewpt (returned by GDDM) (array of short floating-point numbers)
The viewport limits, in normalized device coordinates, of the normalization transformation given by ntnr. Four floating-point numbers are returned in the array: VXMIN, VXMAX, VYMIN, VYMAX.

Operating states

GKOP, WSOP, WSAC, SGOP

Related functions

Set window (GSWN), Set viewport (GSVP)

Description

If the inquired information is available, it is returned as output, and errind is returned as 0 (zero). If the inquired information is not available, all output is invalid, and errind returns an error indicator.

Principal errors

8: GKS not in proper state: GKS shall be in one of the states GKOP, WSOP, WSAC, or SGOP
50: Transformation number is invalid

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