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| author | David Thompson <dthompson2@worcester.edu> | 2017-01-04 22:16:26 -0500 |
|---|---|---|
| committer | David Thompson <dthompson2@worcester.edu> | 2017-01-04 22:16:26 -0500 |
| commit | 98dc87a054c1108bd5f4bb093024d962ce0c8ce2 (patch) | |
| tree | 9fa25dca82134bcdbe8693bfd5b212ce3b3880f8 /chickadee/math.scm | |
First commit!
Diffstat (limited to 'chickadee/math.scm')
| -rw-r--r-- | chickadee/math.scm | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/chickadee/math.scm b/chickadee/math.scm new file mode 100644 index 0000000..753f70d --- /dev/null +++ b/chickadee/math.scm @@ -0,0 +1,26 @@ +;;; Chickadee Game Toolkit +;;; Copyright © 2016 David Thompson <davet@gnu.org> +;;; +;;; Chickadee is free software: you can redistribute it and/or modify +;;; it under the terms of the GNU General Public License as published +;;; by the Free Software Foundation, either version 3 of the License, +;;; or (at your option) any later version. +;;; +;;; Chickadee is distributed in the hope that it will be useful, but +;;; WITHOUT ANY WARRANTY; without even the implied warranty of +;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +;;; General Public License for more details. +;;; +;;; You should have received a copy of the GNU General Public License +;;; along with this program. If not, see +;;; <http://www.gnu.org/licenses/>. + +(define-module (chickadee math) + #:export (clamp)) + +(define (clamp min max x) + "Restrict X to the range defined by MIN and MAX. Assumes that MIN is +actually less than MAX." + (cond ((< x min) min) + ((> x max) max) + (else x))) |