From 7299fdca9a12636817cd383e5bc00840b382cda0 Mon Sep 17 00:00:00 2001
From: Francisco Dans <fdansv@gmail.com>
Date: Wed, 26 Aug 2015 17:37:16 +0200
Subject: [PATCH] adds interpolation for ambiguous cases

---
 examples/contour.html | 36 ++++++++++++++++++++++++++++++++----
 1 file changed, 32 insertions(+), 4 deletions(-)

diff --git a/examples/contour.html b/examples/contour.html
index 6a1c8b9..ea9c0cc 100644
--- a/examples/contour.html
+++ b/examples/contour.html
@@ -177,13 +177,41 @@
 		else if (type === 5 || type === 10) {
 			var diff = [previousPos.x - currentPos.x, previousPos.y - currentPos.y];
 			if (diff[0] === -1){
-				return {x: currentPos.x, y: currentPos.y - 1};
+				return {
+					x: currentPos.x, 
+					y: currentPos.y - 1,
+					interpolation: {
+						x: lerp(cornerValues[1], cornerValues[0], contourValue), 
+						y: lerp(cornerValues[3], cornerValues[0], contourValue)
+					}
+				};
 			} else if (diff[0] === 1){
-				return {x: currentPos.x, y: currentPos.y + 1};
+				return {
+					x: currentPos.x, 
+					y: currentPos.y + 1,
+					interpolation: {
+						x: lerp(cornerValues[3], cornerValues[2], contourValue), 
+						y: lerp(cornerValues[1], cornerValues[2], contourValue)
+					}
+				};
 			} else if (diff[1] === -1){
-				return {x: currentPos.x + 1, y: currentPos.y};
+				return {
+					x: currentPos.x + 1, 
+					y: currentPos.y,
+					interpolation: {
+						x: lerp(cornerValues[1], cornerValues[0], contourValue), 
+						y: lerp(cornerValues[3], cornerValues[0], contourValue)
+					}
+				};
 			} else if (diff[1] === 1){
-				return {x: currentPos.x - 1, y: currentPos.y};
+				return {
+					x: currentPos.x - 1, 
+					y: currentPos.y,
+					interpolation: {
+						x: lerp(cornerValues[3], cornerValues[2], contourValue), 
+						y: lerp(cornerValues[1], cornerValues[2], contourValue)
+					}
+				};
 			}
 		}