Don't use FreezeOnCull for any particle system (#4744)

CHANGELOG.md

@@ -6,6 +6,7 @@
     Bug #3846: Strings starting with "-" fail to compile if not enclosed in quotes
     Bug #3905: Great House Dagoth issues
     Bug #4203: Resurrecting an actor should close the loot GUI
+    Bug #4744: Invisible particles must still be processed
     Bug #4752: UpdateCellCommand doesn't undo properly
     Bug #5100: Persuasion doesn't always clamp the resulting disposition
     Bug #5120: Scripted object spawning updates physics system

apps/openmw/mwrender/animation.cpp

@@ -1678,9 +1678,6 @@ namespace MWRender
         SceneUtil::FindMaxControllerLengthVisitor findMaxLengthVisitor;
         node->accept(findMaxLengthVisitor);
 
-        // FreezeOnCull doesn't work so well with effect particles, that tend to have moving emitters
-        SceneUtil::DisableFreezeOnCullVisitor disableFreezeOnCullVisitor;
-        node->accept(disableFreezeOnCullVisitor);
         node->setNodeMask(Mask_Effect);
 
         params.mMaxControllerLength = findMaxLengthVisitor.getMaxLength();

apps/openmw/mwrender/sky.cpp

@@ -1731,9 +1731,6 @@ void SkyManager::setWeather(const WeatherResult& weather)
 
             mParticleEffect->accept(alphaFaderSetupVisitor);
 
-            SceneUtil::DisableFreezeOnCullVisitor disableFreezeOnCullVisitor;
-            mParticleEffect->accept(disableFreezeOnCullVisitor);
-
             SceneUtil::FindByClassVisitor findPSVisitor(std::string("ParticleSystem"));
             mParticleEffect->accept(findPSVisitor);
 

apps/openmw/mwworld/projectilemanager.cpp

@@ -238,9 +238,6 @@ namespace MWWorld
             state.mNode->addChild(projectileLightSource);
             projectileLightSource->setLight(projectileLight);
         }
-        
-        SceneUtil::DisableFreezeOnCullVisitor disableFreezeOnCullVisitor;
-        state.mNode->accept(disableFreezeOnCullVisitor);
 
         state.mNode->addCullCallback(new SceneUtil::LightListCallback);
 

components/nifosg/nifloader.cpp

@@ -1103,8 +1103,6 @@ namespace NifOsg
             partsys->getDefaultParticleTemplate().setColorRange(osgParticle::rangev4(osg::Vec4f(1.f,1.f,1.f,1.f), osg::Vec4f(1.f,1.f,1.f,1.f)));
             partsys->getDefaultParticleTemplate().setAlphaRange(osgParticle::rangef(1.f, 1.f));
 
-            partsys->setFreezeOnCull(true);
-
             if (!partctrl->emitter.empty())
             {
                 osg::ref_ptr<Emitter> emitter = handleParticleEmitter(partctrl);

components/sceneutil/visitor.cpp

@@ -46,17 +46,6 @@ namespace SceneUtil
     {
     }
 
-    void DisableFreezeOnCullVisitor::apply(osg::MatrixTransform &node)
-    {
-        traverse(node);
-    }
-
-    void DisableFreezeOnCullVisitor::apply(osg::Drawable& drw)
-    {
-        if (osgParticle::ParticleSystem* partsys = dynamic_cast<osgParticle::ParticleSystem*>(&drw))
-            partsys->setFreezeOnCull(false);
-    }
-
     void NodeMapVisitor::apply(osg::MatrixTransform& trans)
     {
         // Take transformation for first found node in file

components/sceneutil/visitor.hpp

@@ -45,20 +45,6 @@ namespace SceneUtil
         std::vector<osg::Node *> mFoundNodes;
     };
 
-    // Disable freezeOnCull for all visited particlesystems
-    class DisableFreezeOnCullVisitor : public osg::NodeVisitor
-    {
-    public:
-        DisableFreezeOnCullVisitor()
-            : osg::NodeVisitor(TRAVERSE_ALL_CHILDREN)
-        {
-        }
-
-        void apply(osg::MatrixTransform& node) override;
-
-        void apply(osg::Drawable& drw) override;
-    };
-
     /// Maps names to nodes
     class NodeMapVisitor : public osg::NodeVisitor
     {