Merge branch 'normalizednormals' into 'master'

Don't handle per-vertex normals as tangent space normals (#7748)

See merge request OpenMW/openmw!3704

files/shaders/compatibility/bs/default.frag

@@ -80,7 +80,7 @@ void main()
     vec3 viewNormal = normalToView(normalTex.xyz * 2.0 - 1.0);
     specularColor *= normalTex.a;
 #else
-    vec3 viewNormal = normalToView(normalize(passNormal));
+    vec3 viewNormal = normalize(gl_NormalMatrix * passNormal);
 #endif
 
     float shadowing = unshadowedLightRatio(linearDepth);

files/shaders/compatibility/bs/default.vert

@@ -69,7 +69,7 @@ void main(void)
 
 
 #if @shadows_enabled
-    vec3 viewNormal = normalToView(passNormal);
+    vec3 viewNormal = normalize(gl_NormalMatrix * passNormal);
     setupShadowCoords(viewPos, viewNormal);
 #endif
 }

files/shaders/compatibility/bs/nolighting.vert

@@ -63,7 +63,7 @@ void main(void)
     }
 
 #if @shadows_enabled
-    vec3 viewNormal = normalize((gl_NormalMatrix * gl_Normal).xyz);
+    vec3 viewNormal = normalize(gl_NormalMatrix * passNormal);
     setupShadowCoords(viewPos, viewNormal);
 #endif
 }

files/shaders/compatibility/groundcover.vert

@@ -156,7 +156,7 @@ void main(void)
 #endif
 
 #if (!PER_PIXEL_LIGHTING || @shadows_enabled)
-    vec3 viewNormal = normalToView(passNormal);
+    vec3 viewNormal = normalize(gl_NormalMatrix * passNormal);
 #endif
 
 #if @diffuseMap

files/shaders/compatibility/objects.frag

@@ -169,7 +169,7 @@ vec2 screenCoords = gl_FragCoord.xy / screenRes;
 #if @normalMap
     vec3 viewNormal = normalToView(texture2D(normalMap, normalMapUV + offset).xyz * 2.0 - 1.0);
 #else
-    vec3 viewNormal = normalToView(normalize(passNormal));
+    vec3 viewNormal = normalize(gl_NormalMatrix * passNormal);
 #endif
 
     vec3 viewVec = normalize(passViewPos);

files/shaders/compatibility/objects.vert

@@ -101,7 +101,7 @@ void main(void)
 #endif
 
 #if @envMap || !PER_PIXEL_LIGHTING || @shadows_enabled
-    vec3 viewNormal = normalToView(passNormal);
+    vec3 viewNormal = normalize(gl_NormalMatrix * passNormal);
 #endif
 
 #if @envMap

files/shaders/compatibility/terrain.frag

@@ -65,7 +65,7 @@ void main()
 #if @normalMap
     vec3 viewNormal = normalToView(texture2D(normalMap, adjustedUV).xyz * 2.0 - 1.0);
 #else
-    vec3 viewNormal = normalToView(normalize(passNormal));
+    vec3 viewNormal = normalize(gl_NormalMatrix * passNormal);
 #endif
 
     float shadowing = unshadowedLightRatio(linearDepth);

files/shaders/compatibility/terrain.vert

@@ -52,7 +52,7 @@ void main(void)
 #endif
 
 #if !PER_PIXEL_LIGHTING || @shadows_enabled
-    vec3 viewNormal = normalToView(passNormal);
+    vec3 viewNormal = normalize(gl_NormalMatrix * passNormal);
 #endif
 
 #if !PER_PIXEL_LIGHTING