Merge branch 'vertex_lighting_fix' into 'master'

Correct vertex lighting

Closes #5973

See merge request OpenMW/openmw!770

files/shaders/groundcover_fragment.glsl

@@ -73,12 +73,7 @@ void main()
     vec3 diffuseLight, ambientLight;
     doLighting(passViewPos, normalize(viewNormal), shadowing, diffuseLight, ambientLight);
     lighting = diffuseLight + ambientLight;
-#endif
-
-#if @clamp
-    lighting = clamp(lighting, vec3(0.0), vec3(1.0));
-#else
-    lighting = max(lighting, 0.0);
+    clampLightingResult(lighting);
 #endif
 
     gl_FragData[0].xyz *= lighting;

files/shaders/groundcover_vertex.glsl

@@ -165,6 +165,7 @@ void main(void)
     vec3 diffuseLight, ambientLight;
     doLighting(viewPos.xyz, viewNormal, diffuseLight, ambientLight, shadowDiffuseLighting);
     passLighting = diffuseLight + ambientLight;
+    clampLightingResult(passLighting);
 #endif
 
 #if (@shadows_enabled)

files/shaders/lighting_util.glsl

@@ -129,3 +129,12 @@ vec4 lcalcSpecular(int lightIndex)
     return @getLight[lightIndex].specular;
 #endif
 }
+
+void clampLightingResult(inout vec3 lighting)
+{
+#if @clamp
+    lighting = clamp(lighting, vec3(0.0), vec3(1.0));
+#else
+    lighting = max(lighting, 0.0);
+#endif
+}

files/shaders/nv_default_fragment.glsl

@@ -78,11 +78,7 @@ void main()
 #endif
     vec3 lighting = diffuseColor.xyz * diffuseLight + getAmbientColor().xyz * ambientLight + emission;
 
-#if @clamp
-    lighting = clamp(lighting, vec3(0.0), vec3(1.0));
-#else
-    lighting = max(lighting, 0.0);
-#endif
+    clampLightingResult(lighting);
 
     gl_FragData[0].xyz *= lighting;
 

files/shaders/objects_fragment.glsl

@@ -176,12 +176,7 @@ void main()
     doLighting(passViewPos, normalize(viewNormal), shadowing, diffuseLight, ambientLight);
     vec3 emission = getEmissionColor().xyz * emissiveMult;
     lighting = diffuseColor.xyz * diffuseLight + getAmbientColor().xyz * ambientLight + emission;
-#endif
-
-#if @clamp
-    lighting = clamp(lighting, vec3(0.0), vec3(1.0));
-#else
-    lighting = max(lighting, 0.0);
+    clampLightingResult(lighting);
 #endif
 
     gl_FragData[0].xyz *= lighting;

files/shaders/objects_vertex.glsl

@@ -125,6 +125,7 @@ void main(void)
     doLighting(viewPos.xyz, viewNormal, diffuseLight, ambientLight, shadowDiffuseLighting);
     vec3 emission = getEmissionColor().xyz * emissiveMult;
     passLighting = getDiffuseColor().xyz * diffuseLight + getAmbientColor().xyz * ambientLight + emission;
+    clampLightingResult(passLighting);
     shadowDiffuseLighting *= getDiffuseColor().xyz;
 #endif
 

files/shaders/terrain_fragment.glsl

@@ -87,12 +87,7 @@ void main()
     vec3 diffuseLight, ambientLight;
     doLighting(passViewPos, normalize(viewNormal), shadowing, diffuseLight, ambientLight);
     lighting = diffuseColor.xyz * diffuseLight + getAmbientColor().xyz * ambientLight + getEmissionColor().xyz;
-#endif
-
-#if @clamp
-    lighting = clamp(lighting, vec3(0.0), vec3(1.0));
-#else
-    lighting = max(lighting, 0.0);
+    clampLightingResult(lighting);
 #endif
 
     gl_FragData[0].xyz *= lighting;

files/shaders/terrain_vertex.glsl

@@ -47,6 +47,7 @@ void main(void)
     vec3 diffuseLight, ambientLight;
     doLighting(viewPos.xyz, viewNormal, diffuseLight, ambientLight, shadowDiffuseLighting);
     passLighting = getDiffuseColor().xyz * diffuseLight + getAmbientColor().xyz * ambientLight + getEmissionColor().xyz;
+    clampLightingResult(passLighting);
     shadowDiffuseLighting *= getDiffuseColor().xyz;
 #endif