From 5ce71c1f32cd0090841428fdafbc5d32e93442dd Mon Sep 17 00:00:00 2001
From: Eleftherios Garyfallidis <garyfallidis@gmail.com>
Date: Fri, 21 Aug 2020 13:52:24 -0400
Subject: [PATCH] BF: Out should be varying

---
 docs/tutorials/04_shaders/viz_shader.py | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/docs/tutorials/04_shaders/viz_shader.py b/docs/tutorials/04_shaders/viz_shader.py
index b6a65206f..f33db9433 100644
--- a/docs/tutorials/04_shaders/viz_shader.py
+++ b/docs/tutorials/04_shaders/viz_shader.py
@@ -51,7 +51,7 @@
 fragment_shader_code_decl = \
     """
     uniform float time;
-    out vec4 myVertexVC;
+    varying vec4 myVertexVC;
     """
 
 fragment_shader_code_impl = \
@@ -59,7 +59,7 @@
     vec2 iResolution = vec2(1024,720);
     vec2 uv = myVertexVC.xy/iResolution;
     vec3 col = 0.5 + 0.5 * cos((time/30) + uv.xyx + vec3(0, 2, 4));
-    fragOutput0 = vec4(col, 1.0);
+    fragOutput0 = vec4(col, fragOutput0.a);
     """
 
 shader_to_actor(utah, "vertex", impl_code=vertex_shader_code_impl,
@@ -108,11 +108,6 @@ def shader_callback(_caller, _event, calldata=None):
 tb = ui.TextBlock2D()
 tb.message = "Hello Shaders"
 
-###############################################################################
-# Change the property of the actor
-
-utah.GetProperty().SetOpacity(0.5)
-
 ###############################################################################
 # Show Manager
 #