From 30fbd376458702f7b006e45016139f9547df13e1 Mon Sep 17 00:00:00 2001
From: Atlante45 <clement.brisset@gmail.com>
Date: Wed, 17 Jun 2015 18:08:04 +0200
Subject: [PATCH] Transmit normal to text rendering shader

---
 libraries/render-utils/src/sdf_text3D.slf | 11 ++++++++---
 libraries/render-utils/src/sdf_text3D.slv |  6 ++++++
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/libraries/render-utils/src/sdf_text3D.slf b/libraries/render-utils/src/sdf_text3D.slf
index 07ca75237b..361f8454ab 100644
--- a/libraries/render-utils/src/sdf_text3D.slf
+++ b/libraries/render-utils/src/sdf_text3D.slf
@@ -14,8 +14,11 @@ uniform sampler2D Font;
 uniform bool Outline;
 uniform vec4 Color;
 
-const float gamma = 2.6;
-const float smoothing = 100.0;
+// the interpolated normal
+varying vec4 interpolatedNormal;
+
+const float gamma = 2.2;
+const float smoothing = 64.0;
 const float interiorCutoff = 0.8;
 const float outlineExpansion = 0.2;
 
@@ -43,5 +46,7 @@ void main() {
     }
 
     // final color
-    gl_FragColor = vec4(Color.rgb, Color.a * a);
+    gl_FragData[0] = vec4(Color.rgb, Color.a * a);
+    gl_FragData[1] = vec4(interpolatedNormal.xyz, 0.0) * 0.5 + vec4(0.5, 0.5, 0.5, 1.0);
+    gl_FragData[2] = vec4(0.0);
 }
\ No newline at end of file
diff --git a/libraries/render-utils/src/sdf_text3D.slv b/libraries/render-utils/src/sdf_text3D.slv
index f7c35a257c..6838650e75 100644
--- a/libraries/render-utils/src/sdf_text3D.slv
+++ b/libraries/render-utils/src/sdf_text3D.slv
@@ -13,6 +13,9 @@
 
 <$declareStandardTransform()$>
 
+// the interpolated normal
+varying vec4 interpolatedNormal;
+
 void main() {
     gl_TexCoord[0] = gl_MultiTexCoord0;
     
@@ -20,4 +23,7 @@ void main() {
     TransformCamera cam = getTransformCamera();
     TransformObject obj = getTransformObject();
     <$transformModelToClipPos(cam, obj, gl_Vertex, gl_Position)$>
+    <$transformModelToEyeDir(cam, obj, gl_Normal, interpolatedNormal.xyz)$>
+    
+    interpolatedNormal = vec4(normalize(interpolatedNormal.xyz), 0.0);
 }
\ No newline at end of file