Use the view matrix instead of modelview to transform the light stuff.

--HG--
branch : gsoc2013-dfighter

code/nel/include/nel/3d/program.h

@@ -120,9 +120,9 @@ struct CProgramIndex
 		ModelViewProjectionInverseTranspose,
 
 		NormalMatrix,
+		ViewMatrix,
 
 		Fog,
-
 		FogStart,
 		FogEnd,
 		FogColor,

code/nel/src/3d/driver/opengl3/driver_glsl_shader_generator.cpp

@@ -287,6 +287,11 @@ namespace NL3D
 		ss << "uniform mat3 normalMatrix;" << std::endl;
 	}
 
+	void CGLSLShaderGenerator::addViewMatrix()
+	{
+		ss << "uniform mat4 viewMatrix;" << std::endl;
+	}
+
 	void CGLSLShaderGenerator::addAlphaTreshold()
 	{
 		ss << "uniform float alphaTreshold;" << std::endl;
@@ -424,7 +429,7 @@ namespace NL3D
 
 		ss << "vec4 getLight" << num << "Color()" << std::endl;
 		ss << "{" << std::endl;
-		ss << "vec4 lightDir4 = modelView * vec4( light" << num << "DirOrPos, 1.0 );" << std::endl;
+		ss << "vec4 lightDir4 = viewMatrix * vec4( light" << num << "DirOrPos, 1.0 );" << std::endl;
 		ss << "vec3 lightDir = lightDir4.xyz / lightDir4.w;" << std::endl;
 		ss << "lightDir = normalize( lightDir );" << std::endl;
 		ss << "vec3 normal3 = vnormal.xyz / vnormal.w;" << std::endl;
@@ -461,7 +466,7 @@ namespace NL3D
 		ss << "vec4 getLight" << num << "Color()" << std::endl;
 		ss << "{" << std::endl;
 		ss << "vec3 ecPos3 = ecPos4.xyz / ecPos4.w;" << std::endl;
-		ss << "vec4 lightPos4 = modelView * vec4( light" << num << "DirOrPos, 1.0 );" << std::endl;
+		ss << "vec4 lightPos4 = viewMatrix * vec4( light" << num << "DirOrPos, 1.0 );" << std::endl;
 		ss << "vec3 lightPos = lightPos4.xyz / lightPos4.w;" << std::endl;
 		ss << "vec3 lightDirection = lightPos - ecPos3;" << std::endl;
 		ss << "float lightDistance = length( lightDirection );" << std::endl;
@@ -538,10 +543,14 @@ namespace NL3D
 
 	void CGLSLShaderGenerator::generateNormalVS()
 	{
-		if( desc->fogEnabled() || desc->lightingEnabled() )
+		if( desc->fogEnabled() || desc->hasPointLight() )
 		{
 			ss << "uniform mat4 modelView;" << std::endl;
 		}
+		if( desc->lightingEnabled() )
+		{
+			addViewMatrix();
+		}
 		if( desc->fogEnabled() || desc->hasPointLight() )
 		{
 			ss << "vec4 ecPos4;" << std::endl;
@@ -608,6 +617,7 @@ namespace NL3D
 
 		if( desc->lightingEnabled() )
 		{
+			addViewMatrix();
 			addNormalMatrix();
 			addLightUniformsVS();
 			addLightOutsVS();

code/nel/src/3d/driver/opengl3/driver_glsl_shader_generator.h

@@ -59,6 +59,8 @@ namespace NL3D
 		/// Adds the normal matrix declaration to the program
 		void addNormalMatrix();
 
+		void addViewMatrix();
+
 		//////////////////////////// Alpha Threshold //////////////////
 		
 		/// Adds the alpha threshold uniform to the program

code/nel/src/3d/driver/opengl3/driver_opengl_program.cpp

@@ -778,6 +778,12 @@ namespace NL3D
 			setUniform4x4f( program, mvpIndex, mvp );
 		}
 
+		int vmIndex = p->getUniformIndex( CProgramIndex::ViewMatrix );
+		if( vmIndex != -1 )
+		{
+			setUniform4x4f( program, vmIndex, _ViewMtx );
+		}
+
 		int mvIndex = p->getUniformIndex( CProgramIndex::ModelView );
 		if( mvIndex != -1 )
 		{
@@ -881,7 +887,11 @@ namespace NL3D
 				if( lp != -1 )
 				{
 					CVector v = _UserLight[ i ].getPosition();
-					setUniform3f( program, lp, v.x, v.y, v.z );
+					float pos[ 3 ];
+					pos[ 0 ] = v.x - _PZBCameraPos.x;
+					pos[ 1 ] = v.y - _PZBCameraPos.y;
+					pos[ 2 ] = v.z - _PZBCameraPos.z;
+					setUniform3f( program, lp, pos[ 0 ], pos[ 1 ], pos[ 2 ] );
 				}
 			}
 

code/nel/src/3d/program.cpp

@@ -90,9 +90,9 @@ const char *CProgramIndex::Names[NUM_UNIFORMS] =
 	"modelViewProjectionInverseTranspose",
 
 	"normalMatrix",
+	"viewMatrix",
 
 	"fog",
-
 	"fogStart",
 	"fogEnd",
 	"fogColor",