Single pass lighting now computes view dir in the appropriate space out of the lights loop as it's the same for all lights.

jme3-core/src/main/resources/Common/MatDefs/Light/SPLighting.frag

@@ -162,6 +162,9 @@ void main(){
 
         #ifdef NORMALMAP   
             mat3 tbnMat = mat3(normalize(vTangent.xyz) , normalize(vBinormal.xyz) , normalize(vNormal.xyz));
+            vec3 viewDir = normalize(-vPos.xyz * tbnMat);
+        #else
+            vec3 viewDir = normalize(-vPos.xyz);
         #endif
 
         for( int i = 0;i < NB_LIGHTS; i+=3){
@@ -184,11 +187,9 @@ void main(){
             #ifdef NORMALMAP         
                 //Normal map -> lighting is computed in tangent space
                 lightDir.xyz = normalize(lightDir.xyz * tbnMat);                
-                vec3 viewDir = normalize(-vPos.xyz * tbnMat);
             #else
                 //no Normal map -> lighting is computed in view space
                 lightDir.xyz = normalize(lightDir.xyz);                
-                vec3 viewDir = normalize(-vPos.xyz);
             #endif
 
             vec2 light = computeLighting(normal, viewDir, lightDir.xyz, lightDir.w * spotFallOff , m_Shininess);