FunctionPackage: cgToCDocOverviewCGDocRelNotesFAQIndexPermutedIndex
Allegro CL version 10.0
Unrevised from 9.0 to 10.0.
9.0 version

line-y-at-x

Arguments: point1 point2 x

Returns the y coordinate where a line has a particular x coordinate, or nil for a vertical 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 x 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 and line-y-at-x-x-y.


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This page was not revised from the 9.0 page.
Created 2015.5.21.

ToCDocOverviewCGDocRelNotesFAQIndexPermutedIndex
Allegro CL version 10.0
Unrevised from 9.0 to 10.0.
9.0 version