| Allegro CL version 8.2 This page is new in 8.2. | ||||||||||
Arguments: x1 y1 x2 y2 x
Returns the y coordinate where a line has a
particular x coordinate,
or nil for a vertical 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 x coordinate. The returned value is a real number
or nil.
See also line-x-at-y-x-y and line-y-at-x.
Copyright (c) 1998-2016, Franz Inc. Oakland, CA., USA. All rights reserved.
This page is new in the 8.2 release.
Created 2016.6.21.
| Allegro CL version 8.2 This page is new in 8.2. | ||||||||||