uwqgxi/uwqgyi

DCL:GRPH2:UWPACK : Grid Point Information Handling Routines: Explanation of Subroutines

11.2.6 uwqgxi/uwqgyi

1.

Function

Returns a grid point number for the grid point with the largest value less than the given coordinate value. Also returns the position between the next grid.

2.

Call

iux, frac = NumRu::DCL.uwqgxi(ux)
iuy, frac = NumRu::DCL.uwqgyi(uy)

3.

Explanation of Parameters

ux, uy (R) Coordinate value.

iux, iuy (I) Grid point number

fracx, fracy (R) The position between the next grid point. When fracx/fracy=0, ux/uy is on a grid point, when fracx/fracy=1, ux/uy is on the next grid point.

4.

Notes

(a): Before using these functions, you must call UWIGXI/UWIGYI to initialize.
(b): These functions can be used for both methods for setting the grid points. (UWSGXA/UWSGYA or uwsgxb/uwsgyb)

`ux, uy`	`(R)`	Coordinate value.
`iux, iuy`	`(I)`	Grid point number
`fracx, fracy`	`(R)`	The position between the next grid point. When `fracx/fracy=0`, `ux/uy` is on a grid point, when `fracx/fracy=1`, `ux/uy` is on the next grid point.