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| Allegro CL version 10.1 Unrevised from 10.0 to 10.1. 10.0 version

## line-x-at-y-x-y

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) 1998-2022, Franz Inc. Lafayette, CA., USA. All rights reserved.
This page was not revised from the 10.0 page.
Created 2019.8.20.

|  | ToC | DocOverview | CGDoc | RelNotes | FAQ | Index | PermutedIndex
| Allegro CL version 10.1 Unrevised from 10.0 to 10.1. 10.0 version