From e280c27adfde6807ddc2d9363101fec92ac3e9b7 Mon Sep 17 00:00:00 2001
From: "mul..va" <mulova@gmail.com>
Date: Thu, 31 Mar 2011 08:45:49 +0000
Subject: [PATCH] URL:
 http://jmonkeyengine.org/groups/contribution-depot-jme3/forum/topic/checking-gui-culling/
 Check Culling of Gui Node on Screen Space Now Gui node can have
 Bucket.Dynamic

git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@7145 75d07b2b-3a1a-0410-a2c5-0572b91ccdca
---
 engine/src/core/com/jme3/renderer/Camera.java | 20 +++++++++++++++++++
 engine/src/core/com/jme3/scene/Spatial.java   | 15 +++++++++-----
 2 files changed, 30 insertions(+), 5 deletions(-)

diff --git a/engine/src/core/com/jme3/renderer/Camera.java b/engine/src/core/com/jme3/renderer/Camera.java
index 46be4da15..01048b7a6 100644
--- a/engine/src/core/com/jme3/renderer/Camera.java
+++ b/engine/src/core/com/jme3/renderer/Camera.java
@@ -31,6 +31,7 @@
  */
 package com.jme3.renderer;
 
+import com.jme3.bounding.BoundingBox;
 import com.jme3.bounding.BoundingVolume;
 import com.jme3.export.JmeExporter;
 import com.jme3.export.JmeImporter;
@@ -205,6 +206,7 @@ public class Camera implements Savable, Cloneable {
     protected Matrix4f viewMatrix = new Matrix4f();
     protected Matrix4f projectionMatrix = new Matrix4f();
     protected Matrix4f viewProjectionMatrix = new Matrix4f();
+    private BoundingBox guiBounding = new BoundingBox();
 
     /**
      * Constructor instantiates a new <code>Camera</code> object. All
@@ -962,6 +964,10 @@ public class Camera implements Savable, Cloneable {
 
         return rVal;
     }
+    
+    public boolean containsGui(BoundingVolume bound) {
+        return guiBounding.intersects(bound);
+    }
 
     /**
      * @return the view matrix of the camera.
@@ -1042,6 +1048,20 @@ public class Camera implements Savable, Cloneable {
      */
     public void onViewPortChange() {
         viewportChanged = true;
+        setGuiBounding();
+    }
+    
+    private void setGuiBounding() {
+        float sx = width*viewPortLeft;
+        float ex = width*viewPortRight;
+        float sy = height*viewPortBottom;
+        float ey = height*viewPortTop;
+        float xExtent = (ex-sx)/2;
+        float yExtent = (ey-sy)/2;
+        guiBounding.setCenter(new Vector3f(sx+xExtent, sy+yExtent, 0));
+        guiBounding.setXExtent(xExtent);
+        guiBounding.setYExtent(yExtent);
+        guiBounding.setZExtent(Float.MAX_VALUE);
     }
 
     /**
diff --git a/engine/src/core/com/jme3/scene/Spatial.java b/engine/src/core/com/jme3/scene/Spatial.java
index af4cd4493..f2330b633 100644
--- a/engine/src/core/com/jme3/scene/Spatial.java
+++ b/engine/src/core/com/jme3/scene/Spatial.java
@@ -51,6 +51,7 @@ import com.jme3.renderer.Camera;
 import com.jme3.renderer.RenderManager;
 import com.jme3.renderer.ViewPort;
 import com.jme3.renderer.queue.RenderQueue;
+import com.jme3.renderer.queue.RenderQueue.Bucket;
 import com.jme3.renderer.queue.RenderQueue.ShadowMode;
 import com.jme3.scene.control.Control;
 import com.jme3.util.TempVars;
@@ -247,11 +248,15 @@ public abstract class Spatial implements Savable, Cloneable, Collidable {
                 : Camera.FrustumIntersect.Intersects);
 
         if (frustrumIntersects == Camera.FrustumIntersect.Intersects) {
-            int state = cam.getPlaneState();
-
-            frustrumIntersects = cam.contains(getWorldBound());
-            
-            cam.setPlaneState(state);
+            if (getQueueBucket() == Bucket.Gui) {
+                return cam.containsGui(getWorldBound());
+            } else {
+                int state = cam.getPlaneState();
+                
+                frustrumIntersects = cam.contains(getWorldBound());
+                
+                cam.setPlaneState(state);
+            }
         }
 
         return frustrumIntersects != Camera.FrustumIntersect.Outside;