math - remap function

Author: JasimAlrawie

snippets/javascript/mathematical-functions/remap.md

@@ -0,0 +1,17 @@
+---
+title: Remap
+description: re-maps a value from one range to another
+author: JasimAlrawie
+tags: math,number-theory,algebra
+---
+
+```js
+function remap(v, start1, end1, start2, end2) {
+    return (v-start1) * (stop2 - start2)/(stop1 - start1) + start2
+}
+
+// Usage:
+remap(value, 0, 1, 0, 255)    // remaps the value from (0,1) to (0,255)
+remap(value, 0, PI*2, 0, 360) // remaps the value from rad to deg
+remap(value, -1, 1, 1, 8)     // remaps the value from (-1,1) to (1,8)
+```