From 906b0be675e5467665f65180924e6117700b4cbb Mon Sep 17 00:00:00 2001
From: Graham Linden <graham@lindenlab.com>
Date: Fri, 3 May 2019 08:47:13 -0700
Subject: SL-11087, SL-11086, SL-11092

Fix sun/moon glow factor bustage.

Make darkness an option.

Fix moon fade shader logic getting confused when sun was below horizon.
---
 .../app_settings/shaders/class1/deferred/alphaF.glsl      | 13 ++++++-------
 .../app_settings/shaders/class1/deferred/materialF.glsl   | 15 ++++++---------
 .../shaders/class1/deferred/softenLightF.glsl             |  2 +-
 3 files changed, 13 insertions(+), 17 deletions(-)

(limited to 'indra/newview/app_settings/shaders/class1/deferred')

diff --git a/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl b/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl
index ecb1d599de..0a189ff416 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl
@@ -119,9 +119,9 @@ vec3 calcPointLightOrSpotLight(vec3 light_col, vec3 diffuse, vec3 v, vec3 n, vec
         //distance attenuation
         float dist = (la > 0) ? d/la : 1.0f;
         fa += 1.0f;
-        float dist_atten = (fa > 0) ? clamp(1.0-(dist-1.0*(1.0-fa))/fa, 0.0, 1.0) : 1.0f;
+        float dist_atten = (fa > 0) ? clamp(1.0-(dist-1.0*(1.0-fa))/fa, 0.0, 1.0) : 0.0f;
         dist_atten *= dist_atten;
-        dist_atten *= 2.0;
+        dist_atten *= 2.2f;
 
         // spotlight coefficient.
         float spot = max(dot(-ln, lv), is_pointlight);
@@ -131,15 +131,14 @@ vec3 calcPointLightOrSpotLight(vec3 light_col, vec3 diffuse, vec3 v, vec3 n, vec
         float lit = max(da * dist_atten,0.0);
 
         float amb_da = ambiance;
-        if (da > 0)
+        if (lit > 0)
         {
             col = lit * light_col * diffuse;
             amb_da += (da*0.5+0.5) * ambiance;
+            amb_da += (da*da*0.5 + 0.5) * ambiance;
+            amb_da *= dist_atten;
+            amb_da = min(amb_da, 1.0f - lit);
         }
-        amb_da += (da*da*0.5 + 0.5) * ambiance;
-        amb_da *= dist_atten;
-        amb_da = min(amb_da, 1.0f - lit);
-
         col.rgb += amb_da * 0.5 * light_col * diffuse;
 
         // no spec for alpha shader...
diff --git a/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl b/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl
index f640dba59b..54bed38fb7 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl
@@ -120,7 +120,7 @@ vec3 calcPointLightOrSpotLight(vec3 light_col, vec3 npos, vec3 diffuse, vec4 spe
         fa += 1.0f;
         float dist_atten = ( fa > 0) ? clamp(1.0-(dist-1.0*(1.0-fa))/fa, 0.0, 1.0) : 1.0f;
         dist_atten *= dist_atten;
-        dist_atten *= 2.0;
+        dist_atten *= 2.2f;
 
         if (dist_atten <= 0)
         {
@@ -143,13 +143,10 @@ vec3 calcPointLightOrSpotLight(vec3 light_col, vec3 npos, vec3 diffuse, vec4 spe
         {
             col = light_col*lit*diffuse;
             amb_da += (da*0.5 + 0.5) * ambiance;
+            amb_da += (da*da*0.5+0.5) * ambiance;
+            amb_da = min(amb_da, 1.0f - lit);
         }
-        amb_da += (da*da*0.5+0.5) * ambiance;
-        amb_da = min(amb_da, 1.0f - lit);
-
-#ifndef NO_AMBIANCE
-        col.rgb += amb_da * 0.5 * light_col * diffuse;
-#endif
+        col.rgb += amb_da * 0.25 * light_col * diffuse;
 
         if (spec.a > 0.0)
         {
@@ -362,7 +359,7 @@ vec3 post_diffuse = color.rgb;
             float scol = fres*texture2D(lightFunc, vec2(nh, spec.a)).r*gt/(nh*da);
             vec3 speccol = sun_contrib*scol*spec.rgb;
             speccol = clamp(speccol, vec3(0), vec3(1));
-            bloom = dot(speccol, speccol) / 6;
+            bloom = dot(speccol, speccol) / 6.0f;
             color += speccol;
         }
     }
@@ -400,7 +397,7 @@ vec3 post_atmo = color.rgb;
             
     vec3 light = vec3(0,0,0);
 
- #define LIGHT_LOOP(i) light.rgb += calcPointLightOrSpotLight(light_diffuse[i].rgb, npos, diffuse_linear.rgb, final_specular, pos.xyz, norm.xyz, light_position[i], light_direction[i].xyz, light_attenuation[i].x, light_attenuation[i].y, light_attenuation[i].z, glare, light_attenuation[i].w * 0.5);
+ #define LIGHT_LOOP(i) light.rgb += calcPointLightOrSpotLight(light_diffuse[i].rgb, npos, diffuse_linear.rgb, final_specular, pos.xyz, norm.xyz, light_position[i], light_direction[i].xyz, light_attenuation[i].x, light_attenuation[i].y, light_attenuation[i].z, glare, light_attenuation[i].w);
 
         LIGHT_LOOP(1)
         LIGHT_LOOP(2)
diff --git a/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl
index 84642b2f98..d13a717761 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl
@@ -146,7 +146,7 @@ vec3 post_diffuse = color.rgb;
                 float scontrib = fres*texture2D(lightFunc, vec2(nh, spec.a)).r*gt/(nh*da);
                 vec3 speccol = sun_contrib*scontrib*spec.rgb;
                 speccol = clamp(speccol, vec3(0), vec3(1));
-                bloom += dot (speccol, speccol) / 6;
+                bloom += dot(speccol, speccol) / 12.0;
                 color += speccol;
             }
         }
-- 
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