From e5572e9deb69a27567537bf4e85d796f1d6fa6d3 Mon Sep 17 00:00:00 2001
From: ZappoMan <bradh@konamoxt.com>
Date: Thu, 9 Oct 2014 19:20:33 -0700
Subject: [PATCH] don't render if alpha is 0

---
 interface/src/ui/overlays/Circle3DOverlay.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/interface/src/ui/overlays/Circle3DOverlay.cpp b/interface/src/ui/overlays/Circle3DOverlay.cpp
index 7cd385f963..62ddee4cf2 100644
--- a/interface/src/ui/overlays/Circle3DOverlay.cpp
+++ b/interface/src/ui/overlays/Circle3DOverlay.cpp
@@ -40,13 +40,18 @@ void Circle3DOverlay::render() {
     if (!_visible) {
         return; // do nothing if we're not visible
     }
+
+    float alpha = getAlpha();
+
+    if (alpha == 0.0) {
+        return; // do nothing if our alpha is 0, we're not visible
+    }
     
     const float FULL_CIRCLE = 360.0f;
     const float SLICES = 180.0f;  // The amount of segment to create the circle
     const float SLICE_ANGLE = FULL_CIRCLE / SLICES;
 
     //const int slices = 15;
-    float alpha = getAlpha();
     xColor color = getColor();
     const float MAX_COLOR = 255.0f;
     glColor4f(color.red / MAX_COLOR, color.green / MAX_COLOR, color.blue / MAX_COLOR, alpha);