From: Frederic Bouvier <fredfgfs01@free.fr>
Date: Wed, 28 Mar 2012 20:39:28 +0000 (+0200)
Subject: Fix normal storage into texture data. Input [-1..1] should be output to [0..1]
X-Git-Url: https://git.mxchange.org/?a=commitdiff_plain;h=8a382cd536743e4cef5b16b37a11fa1282441c5b;p=flightgear.git

Fix normal storage into texture data. Input [-1..1] should be output to [0..1]
---

diff --git a/src/Main/renderer.cxx b/src/Main/renderer.cxx
index 3f71d1f74..771f02317 100644
--- a/src/Main/renderer.cxx
+++ b/src/Main/renderer.cxx
@@ -817,7 +817,7 @@ const char *sunlight_frag_src = ""
 	"    if ( spec_emis.a < 0.1 )\n"
 	"        discard;\n"
     "    vec3 normal;\n"
-	"    normal.xy = texture2D( normal_tex, coords ).rg;\n"
+    "    normal.xy = texture2D( normal_tex, coords ).rg * 2.0 - vec2(1.0,1.0);\n"
 	"    normal.z = sqrt( 1.0 - dot( normal.xy, normal.xy ) );\n"
     "    float len = length(normal);\n"
     "    normal /= len;\n"
@@ -883,7 +883,7 @@ const char *fog_frag_src = ""
 	"    if ( initialized < 0.1 )\n"
 	"        discard;\n"
     "    vec3 normal;\n"
-	"    normal.xy = texture2D( normal_tex, coords ).rg;\n"
+	"    normal.xy = texture2D( normal_tex, coords ).rg * 2.0 - vec2(1.0,1.0);\n"
 	"    normal.z = sqrt( 1.0 - dot( normal.xy, normal.xy ) );\n"
     "    float len = length(normal);\n"
     "    normal /= len;\n"