From 3418488c2f65ae8cf92514cea74df9b5188071a5 Mon Sep 17 00:00:00 2001
From: Zach Pomerantz <zach@highfidelity.io>
Date: Fri, 19 Feb 2016 14:44:33 -0800
Subject: [PATCH] Fool octree to avoid ui grid overlay culling

---
 interface/src/ui/overlays/Grid3DOverlay.cpp | 11 +++++++++++
 interface/src/ui/overlays/Grid3DOverlay.h   |  2 ++
 interface/src/ui/overlays/Planar3DOverlay.h |  2 +-
 3 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/interface/src/ui/overlays/Grid3DOverlay.cpp b/interface/src/ui/overlays/Grid3DOverlay.cpp
index 8246960110..e73520e973 100644
--- a/interface/src/ui/overlays/Grid3DOverlay.cpp
+++ b/interface/src/ui/overlays/Grid3DOverlay.cpp
@@ -13,6 +13,8 @@
 
 #include <QScriptValue>
 
+#include <OctreeConstants.h>
+
 #include <avatar/AvatarManager.h>
 #include <avatar/MyAvatar.h>
 
@@ -38,6 +40,15 @@ Grid3DOverlay::Grid3DOverlay(const Grid3DOverlay* grid3DOverlay) :
     updateGrid();
 }
 
+AABox Grid3DOverlay::getBounds() const {
+    if (_followCamera) {
+        // This is a UI element that should always be in view, lie to the octree to avoid culling
+        const AABox DOMAIN_BOX = AABox(glm::vec3(-TREE_SCALE / 2), TREE_SCALE);
+        return DOMAIN_BOX;
+    }
+    return Planar3DOverlay::getBounds();
+}
+
 void Grid3DOverlay::render(RenderArgs* args) {
     if (!_visible) {
         return; // do nothing if we're not visible
diff --git a/interface/src/ui/overlays/Grid3DOverlay.h b/interface/src/ui/overlays/Grid3DOverlay.h
index 2a4b487e1b..3614a13000 100644
--- a/interface/src/ui/overlays/Grid3DOverlay.h
+++ b/interface/src/ui/overlays/Grid3DOverlay.h
@@ -24,6 +24,8 @@ public:
     Grid3DOverlay();
     Grid3DOverlay(const Grid3DOverlay* grid3DOverlay);
 
+    virtual AABox getBounds() const;
+
     virtual void render(RenderArgs* args);
     virtual const render::ShapeKey getShapeKey() override;
     virtual void setProperties(const QScriptValue& properties);
diff --git a/interface/src/ui/overlays/Planar3DOverlay.h b/interface/src/ui/overlays/Planar3DOverlay.h
index 63de15a8f8..0542a8b491 100644
--- a/interface/src/ui/overlays/Planar3DOverlay.h
+++ b/interface/src/ui/overlays/Planar3DOverlay.h
@@ -20,7 +20,7 @@ public:
     Planar3DOverlay();
     Planar3DOverlay(const Planar3DOverlay* planar3DOverlay);
     
-    AABox getBounds() const;
+    virtual AABox getBounds() const;
     
     glm::vec2 getDimensions() const { return _dimensions; }
     void setDimensions(float value) { _dimensions = glm::vec2(value); }