From 01ef7fd9738e4ac9d0c2fac539599ff1d8b16750 Mon Sep 17 00:00:00 2001
From: dfighter1985 <none@none>
Date: Sun, 15 Sep 2013 20:57:24 +0200
Subject: [PATCH] The specular calculation is probably faster this way.

--HG--
branch : gsoc2013-dfighter
---
 .../src/3d/driver/OpenGL3/driver_glsl_shader_generator.cpp  | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/code/nel/src/3d/driver/OpenGL3/driver_glsl_shader_generator.cpp b/code/nel/src/3d/driver/OpenGL3/driver_glsl_shader_generator.cpp
index 5cf965ef1..4ddf4bfcc 100644
--- a/code/nel/src/3d/driver/OpenGL3/driver_glsl_shader_generator.cpp
+++ b/code/nel/src/3d/driver/OpenGL3/driver_glsl_shader_generator.cpp
@@ -437,8 +437,10 @@ namespace NL3D
 		ss << "{" << std::endl;
 		ss << "vec3 normal3 = vnormal.xyz / vnormal.w;" << std::endl;
 		ss << "normal3 = normalMatrix * normal3;" << std::endl;
-		ss << "vec3 reflection = reflect( normalize( -light" << num << "Dir ), normal3 );" << std::endl;
-		ss << "float angle = dot( normal3, reflection );" << std::endl;
+		//ss << "vec3 reflection = reflect( normalize( -light" << num << "Dir ), normal3 );" << std::endl;
+		ss << "vec3 halfVector = normalize( light" << num << "Dir + normal3 );" << std::endl;
+		//ss << "float angle = dot( normal3, reflection );" << std::endl;
+		ss << "float angle = dot( normal3, halfVector );" << std::endl;
 		ss << "angle = max( 0.0, angle );" << std::endl;
 		ss << "float si = pow( angle, 128.0 );" << std::endl;
 		ss << "return si;" << std::endl;