From: Joe Wreschnig <joe.wreschnig@gmail.com>
Date: Mon, 19 May 2014 08:12:44 +0000 (+0200)
Subject: Lerp precision.
X-Git-Tag: 1.0.0~10
X-Git-Url: https://git.yukkurigames.com/?a=commitdiff_plain;h=5bc5aa65b769e551177545fda77b31ea6c66467e;p=string-lerp.git

Lerp precision.
---

diff --git a/string-lerp.js b/string-lerp.js
index 46a55bf..6c240e4 100644
--- a/string-lerp.js
+++ b/string-lerp.js
@@ -193,9 +193,10 @@
             var part = nlerp(+sourcePart, +targetPart, amount);
             var sourcePoint = sourcePart.indexOf(".");
             var targetPoint = targetPart.indexOf(".");
-            var point = Math.max(
+            var point = Math.round(nlerp(
                 sourcePoint >= 0 ? (sourcePart.length - 1) - sourcePoint : 0,
-                targetPoint >= 0 ? (targetPart.length - 1) - targetPoint : 0);
+                targetPoint >= 0 ? (targetPart.length - 1) - targetPoint : 0,
+                amount));
             targetParts[i] = part.toFixed(point);
         }
         return targetParts.join("");
diff --git a/tests/string-lerp.js b/tests/string-lerp.js
index 2eccba6..f2fb88d 100644
--- a/tests/string-lerp.js
+++ b/tests/string-lerp.js
@@ -152,14 +152,13 @@ JS.Test.describe('numeric lerp', function () { with (this) {
 
     it("rounds integers", function () { with (this) {
         assertEqual("12", lerp("0", "100", 0.123));
-        assertEqual("12.3", lerp("0", "100.0", 0.123));
+        assertEqual("12.3", lerp("0.0", "100.0", 0.123));
         assertEqual("12.3", lerp("0.0", "100", 0.123));
         assertEqual("12.3", lerp("0.0", "100.0", 0.123));
     }});
 
     it("thinks about precision", function () { with (this) {
-        assertEqual("12.30", lerp("0", "100.00", 0.123));
-        assertEqual("12.30", lerp("0.00", "100", 0.123));
+        assertEqual("12.30", lerp("0.00", "100.00", 0.123));
         assertEqual("12.300", lerp("0.000", "100.000", 0.123));
     }});