From 8d6620b0745991a46d73077de171e9a4b51b021e Mon Sep 17 00:00:00 2001
From: scrawl <scrawl@baseoftrash.de>
Date: Thu, 11 Jun 2015 02:37:49 +0200
Subject: [PATCH] Assign an initial bounding box to particle systems

---
 components/nifosg/nifloader.cpp      | 4 ++++
 components/resource/scenemanager.cpp | 8 ++++++++
 2 files changed, 12 insertions(+)

diff --git a/components/nifosg/nifloader.cpp b/components/nifosg/nifloader.cpp
index 2c409ac96..b95eeebfc 100644
--- a/components/nifosg/nifloader.cpp
+++ b/components/nifosg/nifloader.cpp
@@ -749,6 +749,10 @@ namespace NifOsg
 
                 created->setSizeRange(osgParticle::rangef(size, size));
             }
+
+            osg::BoundingBox box;
+            box.expandBy(osg::BoundingSphere(osg::Vec3(0,0,0), particledata->radius));
+            partsys->setInitialBound(box);
         }
 
         static osg::ref_ptr<Emitter> handleParticleEmitter(const Nif::NiParticleSystemController* partctrl)
diff --git a/components/resource/scenemanager.cpp b/components/resource/scenemanager.cpp
index 8de08bd9d..bb4c57e4c 100644
--- a/components/resource/scenemanager.cpp
+++ b/components/resource/scenemanager.cpp
@@ -14,6 +14,7 @@
 #include <components/vfs/manager.hpp>
 
 #include <components/sceneutil/clone.hpp>
+#include <components/sceneutil/util.hpp>
 
 namespace
 {
@@ -61,6 +62,13 @@ namespace
             {
                 partsys->getParticle(i)->transformPositionVelocity(worldMat);
             }
+
+            // transform initial bounds to worldspace
+            osg::BoundingSphere sphere(partsys->getInitialBound());
+            SceneUtil::transformBoundingSphere(worldMat, sphere);
+            osg::BoundingBox box;
+            box.expandBy(sphere);
+            partsys->setInitialBound(box);
         }
     };