diff options
Diffstat (limited to 'indra/newview/app_settings/shaders/class3/deferred')
| -rw-r--r-- | indra/newview/app_settings/shaders/class3/deferred/skyF.glsl | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/indra/newview/app_settings/shaders/class3/deferred/skyF.glsl b/indra/newview/app_settings/shaders/class3/deferred/skyF.glsl index 6de01cb667..0f908a1d82 100644 --- a/indra/newview/app_settings/shaders/class3/deferred/skyF.glsl +++ b/indra/newview/app_settings/shaders/class3/deferred/skyF.glsl @@ -56,8 +56,17 @@ vec3 GetSkyLuminanceToPoint(vec3 camPos, vec3 pos, float shadow_length, vec3 dir vec3 ColorFromRadiance(vec3 radiance); vec3 rainbow(float d) { - float rad = (droplet_radius - 5.0f) / 1024.0f; - return pow(texture2D(rainbow_map, vec2(rad, d)).rgb, vec3(1.8)) * moisture_level; + // 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; } vec3 halo22(float d) |