[#15] map-range

clojerl · Dec 2, 2018 · 85c516f · 85c516f
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diff --git a/docs/quil.core.md b/docs/quil.core.md
@@ -120,7 +120,7 @@
 - [x] [`log`](https://github.com/quil/quil/blob/2.8.0/src/cljc/quil/core.cljc#L2265) - "Calculates the natural logarithm (the base-e logarithm) of a  number"
 - [x] [`looping?`](https://github.com/quil/quil/blob/2.8.0/src/cljc/quil/core.cljc#L1705) - "Returns whether the sketch is looping"
 - [ ] [`mag`](https://github.com/quil/quil/blob/2.8.0/src/cljc/quil/core.cljc#L2278) - "Calculates the magnitude (or length) of a vector"
-- [ ] [`map-range`](https://github.com/quil/quil/blob/2.8.0/src/cljc/quil/core.cljc#L2297) - "Re-maps a number from one range to another"
+- [x] [`map-range`](https://github.com/quil/quil/blob/2.8.0/src/cljc/quil/core.cljc#L2297) - "Re-maps a number from one range to another"
 - [ ] [`mask-image`](https://github.com/quil/quil/blob/2.8.0/src/cljc/quil/core.cljc#L2313) - "Masks part of an image from displaying by loading another image and  using it as an alpha channel"
 - [x] [`millis`](https://github.com/quil/quil/blob/2.8.0/src/cljc/quil/core.cljc#L2335) - "Returns the number of milliseconds (thousandths of a second) since  starting the sketch"
 - [x] [`minute`](https://github.com/quil/quil/blob/2.8.0/src/cljc/quil/core.cljc#L2348) - "Returns the current minute as a value from 0 - 59"

diff --git a/src/doodler/core.clje b/src/doodler/core.clje
@@ -143,6 +143,12 @@
   [n]
   (math/sqrt n))
 
+(defn map-range
+  [val low1 high1 low2 high2]
+  (+ low2
+     (* (- high2 low2)
+        (/ (- val low1) (- high1 low1)))))
+
 ;; Color
 
 (defn color