From aa5a643e3b32449cb287bb0c5bb6735cd4f3803b Mon Sep 17 00:00:00 2001
From: scrawl <scrawl@baseoftrash.de>
Date: Thu, 16 Jun 2016 17:31:17 +0200
Subject: [PATCH] Fix incorrect multiplication order of TBN matrix (Bug #3440)

---
 files/shaders/parallax.glsl | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/files/shaders/parallax.glsl b/files/shaders/parallax.glsl
index 52ea0d2cc..097a59ed1 100644
--- a/files/shaders/parallax.glsl
+++ b/files/shaders/parallax.glsl
@@ -1,8 +1,8 @@
 #define PARALLAX_SCALE 0.04
 #define PARALLAX_BIAS -0.02
 
-vec2 getParallaxOffset(vec3 eyeDir, mat3 tbn, float height)
+vec2 getParallaxOffset(vec3 eyeDir, mat3 tbnTranspose, float height)
 {
-    vec3 TSeyeDir = normalize((vec4(normalize(tbn * eyeDir),0)).xyz);
+    vec3 TSeyeDir = normalize(eyeDir * tbnTranspose);
     return TSeyeDir.xy * ( height * PARALLAX_SCALE + PARALLAX_BIAS );
 }