GETWINDOWCOORD

Graphics Subroutine: Translates viewport coordinates to window coordinates.

Module: USE DFLIB

Syntax

CALL GETWINDOWCOORD (x, y, wt)

x, y
(Input) INTEGER(2). Viewport coordinates to be converted to window coordinates.

wt
(Output) Derived type wxycoord. Window coordinates. The wxycoord derived type is defined in DFLIB.F90 (in the \DF98\INCLUDE subdirectory) as follows:

TYPE wxycoord
  REAL(8) wx   ! x-coordinate
  REAL(8) wy   ! y-coordinate
END TYPE wxycoord

Physical coordinates refer to the physical screen. Viewport coordinates refer to an area of the screen defined as the viewport with SETVIEWPORT. Both take integer coordinate values. Window coordinates refer to a window sized with SETWINDOW or SETWSIZEQQ. Window coordinates are floating-point values and allow easy scaling of data to the window area. For a more complete discussion of coordinate systems, see Understanding Coordinate Systems in the Programmer's Guide.

Compatibility

STANDARD GRAPHICS QUICKWIN GRAPHICS LIB

See Also: GETCURRENTPOSITION, GETPHYSCOORD, GETVIEWCOORD, MOVETO, SETVIEWPORT, SETWINDOW

Example

See the example program in GETPHYSCOORD.