From a2c9fe6700c1fbec23e555bee8fe7a0f2e87cc16 Mon Sep 17 00:00:00 2001
From: Adrian Zankich <adrian@hybridgroup.com>
Date: Wed, 26 Mar 2014 22:24:45 -0700
Subject: [PATCH] Add scale functions

---
 utils.go | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/utils.go b/utils.go
index 73d214c92..3e090ad6a 100644
--- a/utils.go
+++ b/utils.go
@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"github.com/tarm/goserial"
 	"io"
+	"math"
 	"math/rand"
 	"net"
 	"reflect"
@@ -100,3 +101,18 @@ func toJson(obj interface{}) string {
 	b, _ := json.Marshal(obj)
 	return string(b)
 }
+
+func FromScale(input, min, max float64) float64 {
+	return (input - math.Min(min, max)) / (math.Max(min, max) - math.Min(min, max))
+}
+
+func ToScale(input, min, max float64) float64 {
+	i := input*(math.Max(min, max)-math.Min(min, max)) + math.Min(min, max)
+	if i < math.Min(min, max) {
+		return math.Min(min, max)
+	} else if i > math.Max(min, max) {
+		return math.Max(min, max)
+	} else {
+		return i
+	}
+}