From dcb95d164428d1b9fc6c121c77ff1984f400604c Mon Sep 17 00:00:00 2001
From: Anselme <anselme.francois@gmail.com>
Date: Mon, 13 Jun 2016 13:00:45 +0200
Subject: [PATCH] fixed tangent space

---
 src/mesh.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/mesh.cpp b/src/mesh.cpp
index da4b584..aecce41 100644
--- a/src/mesh.cpp
+++ b/src/mesh.cpp
@@ -367,6 +367,8 @@ void Mesh::computeTangents()
         
         glm::vec3 binormalDir = deltaUV1.x * edge2 - deltaUV2.x * edge1;
         binormalDir = glm::normalize(binormalDir*f);
+        if(glm::dot(glm::cross(normals[vertexId0], binormalDir), tangentDir) < 0.f)
+            binormalDir = -binormalDir;
         
         tangents[vertexId0] = {tangentDir, binormalDir};
         tangents[vertexId1] = {tangentDir, binormalDir};