From 2d9dcc85953523b173564643a2dd042c085f97bb Mon Sep 17 00:00:00 2001
From: Zach Pomerantz <zach@highfidelity.io>
Date: Mon, 18 Apr 2016 16:02:45 -0700
Subject: [PATCH] Fix text3d to allow transparent text

---
 .../render-utils/src/DeferredBufferWrite.slh    |  1 +
 libraries/render-utils/src/sdf_text3D.slf       | 17 ++++++-----------
 2 files changed, 7 insertions(+), 11 deletions(-)

diff --git a/libraries/render-utils/src/DeferredBufferWrite.slh b/libraries/render-utils/src/DeferredBufferWrite.slh
index 2a2c2883d3..24a2f0d8a5 100755
--- a/libraries/render-utils/src/DeferredBufferWrite.slh
+++ b/libraries/render-utils/src/DeferredBufferWrite.slh
@@ -46,6 +46,7 @@ const float DEFAULT_METALLIC = 0;
 const vec3 DEFAULT_SPECULAR = vec3(0.1);
 const vec3 DEFAULT_EMISSIVE = vec3(0.0);
 const float DEFAULT_OCCLUSION = 1.0;
+const vec3 DEFAULT_FRESNEL = DEFAULT_EMISSIVE;
 
 
 void packDeferredFragment(vec3 normal, float alpha, vec3 albedo, float roughness, float metallic, vec3 emissive, float occlusion) {
diff --git a/libraries/render-utils/src/sdf_text3D.slf b/libraries/render-utils/src/sdf_text3D.slf
index 854221a5cf..f5385c23b7 100644
--- a/libraries/render-utils/src/sdf_text3D.slf
+++ b/libraries/render-utils/src/sdf_text3D.slf
@@ -41,20 +41,15 @@ void main() {
     float w = clamp( s, 0.0, 0.5);
     float a = smoothstep(0.5 - w, 0.5 + w, sdf);
     
-    // gamma correction for linear attenuation
-    a = pow(a, 1.0 / gamma);
-    
     // discard if unvisible
     if (a < 0.01) {
         discard;
     }
     
-    packDeferredFragmentLightmap(
-         normalize(_normal),
-         1.0,
-         vec3(1.0),
-         DEFAULT_ROUGHNESS,
-         DEFAULT_METALLIC,
-         DEFAULT_SPECULAR,
-         Color.rgb);
+    packDeferredFragmentTranslucent(
+        normalize(_normal),
+        a,
+        Color.rgb,
+        DEFAULT_FRESNEL,
+        DEFAULT_ROUGHNESS);
 }
\ No newline at end of file