FunctionPackage: cgToCDocOverviewCGDocRelNotesFAQIndexPermutedIndex
Allegro CL version 9.0
Unrevised from 8.2 to 9.0.
8.2 version

line-x-at-y

Arguments: point1 point2 y

Returns the x coordinate where a line has a particular y coordinate, or nil for a horizontal line.

The first two arguments are position objects that specify any two distinct points on the line. The last argument is a real number for the y coordinate. The returned value is a real number or nil.

As usual, position objects should contain integers. See make-position. See also line-x-at-y-x-y and line-y-at-x.


Copyright (c) 1998-2012, Franz Inc. Oakland, CA., USA. All rights reserved.
Documentation for Allegro CL version 9.0. This page was not revised from the 8.2 page.
Created 2012.5.30.

ToCDocOverviewCGDocRelNotesFAQIndexPermutedIndex
Allegro CL version 9.0
Unrevised from 8.2 to 9.0.
8.2 version