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| author | Jordan Russell <jordan.likes.curry@gmail.com> | 2014-07-10 21:29:02 -0700 |
|---|---|---|
| committer | David Thompson <dthompson2@worcester.edu> | 2014-08-01 07:19:09 -0400 |
| commit | 1a8ffb0ea7233c55148118c09a7b281673df86c2 (patch) | |
| tree | 335d6c48f74f06ce592f953dc6c99db7e6c4c29b /sly/math.scm | |
| parent | 5926500a1cbf7d809d1f62ec6710bf6b6fe403e7 (diff) | |
Add joystick module.
* sly/joystick.scm: New file.
* examples/joystick.scm: New file.
* Makefile.am (SOURCES): Add sly/joystick.scm.
* TODO.org (Input): Mark as 'done'.
* sly/math.scm (linear-scale): New procedure.
Diffstat (limited to 'sly/math.scm')
| -rw-r--r-- | sly/math.scm | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/sly/math.scm b/sly/math.scm index 073a399..c25e24d 100644 --- a/sly/math.scm +++ b/sly/math.scm @@ -1,5 +1,6 @@ ;;; Sly ;;; Copyright (C) 2013, 2014 David Thompson <dthompson2@worcester.edu> +;;; Copyright (C) 2014 Jordan Russell <jordan.likes.curry@gmail.com> ;;; ;;; This program is free software: you can redistribute it and/or ;;; modify it under the terms of the GNU General Public License as @@ -29,7 +30,8 @@ cos-degrees tan-degrees atan-degrees - clamp)) + clamp + linear-scale)) ;; Dave was editing this module on Pi Approximation Day. ;; @@ -89,3 +91,9 @@ actually less than MAX." (cond ((< x min) min) ((> x max) max) (else x))) + +(define (linear-scale min max a b val) + "Map a VAL in the range [MIN,MAX] to numbers in [A,B]" + (+ a + (/ (* (- b a) (- val min)) + (- max min)))) |