Fix missing wViewDir variable

The wViewDir varying was changed to be stored in the surfface.viewDir value, so all references in the shader needed to be updated to match this.

I also changed some floats to be in decimal format.

jme3-core/src/main/resources/Common/ShaderLib/module/pbrlighting/PBRLightingUtils.glsllib

@@ -285,9 +285,9 @@
         
         void PBRLightingUtils_readPBRSurface(inout PBRSurface surface){
 
-            surface.bakedLightContribution = vec3(0);
-            surface.directLightContribution = vec3(0);
-            surface.envLightContribution = vec3(0);
+            surface.bakedLightContribution = vec3(0.0);
+            surface.directLightContribution = vec3(0.0);
+            surface.envLightContribution = vec3(0.0);
 
             #ifdef ENABLE_PBRLightingUtils_getWorldTangent
                 vec3 tan = normalize(wTangent.xyz); 
@@ -297,7 +297,7 @@
 
             
             #if (defined(PARALLAXMAP) || (defined(NORMALMAP_PARALLAX) && defined(NORMALMAP)))
-                vec3 vViewDir =  wViewDir * surface.tbnMat;  
+                vec3 vViewDir =  surface.viewDir * surface.tbnMat;  
                 #ifdef STEEP_PARALLAX
                     #ifdef NORMALMAP_PARALLAX
                         //parallax map is stored in the alpha channel of the normal map         
@@ -429,7 +429,7 @@
                 #endif
                 surface.emission = emissive.rgb * pow(emissive.a, m_EmissivePower) * m_EmissiveIntensity;
             #else 
-                surface.emission = vec3(0);
+                surface.emission = vec3(0.0);
             #endif
 
             PBRLightingUtils_readSunLightExposureParams(surface);
@@ -573,8 +573,8 @@
 
 
             #if NB_PROBES > 0
-                float probeNdfSum=0;
-                float invProbeNdfSum=0;    
+                float probeNdfSum = 0.0;
+                float invProbeNdfSum = 0.0;    
 
                 #for i=1..4 ( #if NB_PROBES >= $i $0 #endif )
                     vec3 probeColor$i;
@@ -607,7 +607,7 @@
                 #endfor
 
                 #if NB_PROBES > 1
-                    float probeWeightSum=0;
+                    float probeWeightSum= 0.0;
                     #for i=1..4 ( #if NB_PROBES >= $i $0 #endif )
                         float probeWeight$i = ((1.0 - (probeNdf$i / probeNdfSum)) / (NB_PROBES - 1)) *  ( probeInvNdf$i / invProbeNdfSum);
                         probeWeightSum += probeWeight$i;