| Allegro CL version 10.1 Unrevised from 10.0 to 10.1. 10.0 version | ||||||||||
Arguments: lamp
Returns or sets (with setf) the color of the argument
lamp when it is off. The value should be a RGB
color object (see make-rgb) or
nil.
If the value is nil, the effective off-color
will be computed automatically from the on-color and the off-color-factor properties, by multiplying the
red, green, and blue components of the on-color by the off-color-factor number. This allows changing
the overall color of the lamp periodically by changing only the
on-color, letting the off-color match it automatically.
When an RGB color, that color is used directly. The default value is
nil.
When the value property of
lamp is a two-dimensional array (so an array of
lamps is displayed), the value of this property may also be an array
of the same dimensions, with values colors (or nil), allowing each lamp to have its own off-color.
See the description of the lamp control.
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.
| Allegro CL version 10.1 Unrevised from 10.0 to 10.1. 10.0 version | ||||||||||