premier test implémentation d'un composant calculant la zone

traque-back/util.js

@@ -0,0 +1,13 @@
+/**
+ * Scale a value that is known to be in a range to a new range
+ * for instance map(50,0,100,1000,2000) will return 1500 as 50 is halfway between 0 and 100 and 1500 is halfway through 1000 and 2000
+ * @param {Number} value value to map 
+ * @param {Number} oldMin minimum value of the number 
+ * @param {Number} oldMax maximum value of the number
+ * @param {Number} newMin minimum value of the output
+ * @param {Number} newMax maximum value of the output
+ * @returns 
+ */
+export function map(value, oldMin, oldMax, newMin, newMax) {
+    return ((value - oldMin) / (oldMax - oldMin)) * (newMax - newMin) + newMin;
+}