| Allegro CL version 8.2 This page is new in 8.2. | ||||||||||
Arguments: x1 y1 x2 y2 y
Returns the x coordinate where a line has a
particular y coordinate,
or nil for a horizontal line.
The first four arguments are real numbers 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.
See also line-x-at-y and line-y-at-x-x-y.
Copyright (c) 1998-2012, Franz Inc. Oakland, CA., USA. All rights reserved.
Documentation for Allegro CL version 8.2. This page is new in the 8.2 release.
Created 2010.1.21.
| Allegro CL version 8.2 This page is new in 8.2. | ||||||||||