From cd21837efb5369a25c615b15740049119b518152 Mon Sep 17 00:00:00 2001
From: Dgizusse <rej.rioux@gmail.com>
Date: Mon, 13 May 2013 21:20:49 -0400
Subject: [PATCH] - Added Tangents generation if needed.

---
 spine-tk2d/Code/tk2dSpineSkeleton.cs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/spine-tk2d/Code/tk2dSpineSkeleton.cs b/spine-tk2d/Code/tk2dSpineSkeleton.cs
index b0fb8f4e5..823d3eccd 100644
--- a/spine-tk2d/Code/tk2dSpineSkeleton.cs
+++ b/spine-tk2d/Code/tk2dSpineSkeleton.cs
@@ -140,6 +140,14 @@ public class tk2dSpineSkeleton : MonoBehaviour, tk2dRuntime.ISpriteCollectionFor
 		
 		if (skeletonDataAsset.sprites.normalGenerationMode != tk2dSpriteCollection.NormalGenerationMode.None) {
 			mesh.RecalculateNormals();
+
+			if (skeletonDataAsset.sprites.normalGenerationMode == tk2dSpriteCollection.NormalGenerationMode.NormalsAndTangents) {
+				Vector4[] tangents = new Vector4[mesh.normals.Length];
+				for (int t = 0; t < tangents.Length; ++t) {
+					tangents[t] = new Vector4(1, 0, 0, 1);
+				}
+				mesh.tangents = tangents;
+			}
 		}
 		
 		renderer.sharedMaterial = skeletonDataAsset.sprites.spriteCollection.inst.materials[0];