summaryrefslogtreecommitdiff
path: root/indra/newview/app_settings/shaders/class2/deferred
diff options
context:
space:
mode:
authorDave Houlton <euclid@lindenlab.com>2021-01-12 18:13:16 -0700
committerDave Houlton <euclid@lindenlab.com>2021-01-13 09:15:45 -0700
commit9e58a7bdd6777889a43c2a7753cd3b372e55fe84 (patch)
tree72edd56315e64e16e714c9523276f3d336581d31 /indra/newview/app_settings/shaders/class2/deferred
parentc73fbe30820276c4d6cf6801e02ea241d5cfb4ee (diff)
SL-13629 Modify texcoord to reverse rainbow color order
Diffstat (limited to 'indra/newview/app_settings/shaders/class2/deferred')
-rw-r--r--indra/newview/app_settings/shaders/class2/deferred/skyF.glsl10
1 files changed, 9 insertions, 1 deletions
diff --git a/indra/newview/app_settings/shaders/class2/deferred/skyF.glsl b/indra/newview/app_settings/shaders/class2/deferred/skyF.glsl
index 1485c515a4..5a58f9bc8c 100644
--- a/indra/newview/app_settings/shaders/class2/deferred/skyF.glsl
+++ b/indra/newview/app_settings/shaders/class2/deferred/skyF.glsl
@@ -73,7 +73,15 @@ uniform float ice_level;
vec3 rainbow(float d)
{
- d = clamp(d, -1.0, 0.0);
+ // d is the dot product of view and sun directions, so ranging -1.0..1.0
+ // 'interesting' values of d are the range -0.75..-0.825, when view is nearly opposite of sun vec
+ // Rainbox texture mode is GL_REPEAT, so tc of -.75 is equiv to 0.25, -0.825 equiv to 0.175.
+
+ // SL-13629 Rainbow texture has colors within the correct .175...250 range, but order is inverted.
+ // Rather than replace the texture, we mirror and translate the y tc to keep the colors within the
+ // interesting range, but in reversed order: i.e. d = (1 - d) - 1.575
+ d = clamp(-0.575 - d, 0.0, 1.0);
+
float rad = (droplet_radius - 5.0f) / 1024.0f;
return pow(texture2D(rainbow_map, vec2(rad, d)).rgb, vec3(1.8)) * moisture_level;
}