send a raycast through the physics engine to check if sun is visible

apps/openmw/mwrender/renderingmanager.cpp

@@ -305,4 +305,9 @@ void RenderingManager::setSunDirection(const Ogre::Vector3& direction)
     if (mSun) mSun->setPosition(direction);
 }
 
+void RenderingManager::setGlare(bool glare)
+{
+    mSkyManager->setGlare(glare);
+}
+
 } // namespace

apps/openmw/mwrender/renderingmanager.hpp

@@ -93,6 +93,7 @@ class RenderingManager: private RenderingInterface {
     void sunEnable();
     void sunDisable();
     
+    void setGlare(bool glare);
     void skyEnable ();
     void skyDisable ();
     void skySetHour (double hour);

apps/openmw/mwrender/sky.cpp

@@ -54,6 +54,11 @@ void BillboardObject::setRenderQueue(unsigned int id)
     mBBSet->setRenderQueueGroup(id);
 }
 
+SceneNode* BillboardObject::getNode()
+{
+    return mNode;
+}
+
 void BillboardObject::init(const String& textureName,
                     const unsigned int initialSize,
                     const Vector3& position,
@@ -276,8 +281,8 @@ SkyManager::SkyManager (SceneNode* pMwRoot, Camera* pCamera)
 
     mViewport->setBackgroundColour(ColourValue(0.87, 0.87, 0.87));
     
-    mSun = new BillboardObject("textures\\tx_sun_05.dds", 1, Vector3(0.4, 0.4, 1.0), mRootNode);
-    mSunGlare = new BillboardObject("textures\\tx_sun_flash_grey_05.dds", 3, Vector3(0.4, 0.4, 1.0), mRootNode);
+    mSun = new BillboardObject("textures\\tx_sun_05.dds", 1, Vector3(0.4, 0.4, 0.4), mRootNode);
+    mSunGlare = new BillboardObject("textures\\tx_sun_flash_grey_05.dds", 3, Vector3(0.4, 0.4, 0.4), mRootNode);
     mSunGlare->setRenderQueue(RENDER_QUEUE_SKIES_LATE);
     mMasser = new Moon("textures\\tx_masser_full.dds", 1, Vector3(-0.4, -0.4, 0.5), mRootNode);
     mSecunda = new Moon("textures\\tx_secunda_full.dds", 0.5, Vector3(0.4, -0.4, 0.5), mRootNode);
@@ -442,11 +447,13 @@ void SkyManager::update(float duration)
 void SkyManager::enable()
 {
     mRootNode->setVisible(true);
+    mEnabled = true;
 }
 
 void SkyManager::disable()
 {
     mRootNode->setVisible(false);
+    mEnabled = false;
 }
 
 void SkyManager::setMoonColour (bool red)
@@ -508,3 +515,13 @@ void SkyManager::setWeather(const MWWorld::WeatherResult& weather)
 
     mViewport->setBackgroundColour(weather.mFogColor);
 }
+
+void SkyManager::setGlare(bool glare)
+{
+    mSunGlare->setVisible(glare && mEnabled);
+}
+
+Vector3 SkyManager::getRealSunPos()
+{
+    return mSun->getNode()->_getDerivedPosition();
+}

apps/openmw/mwrender/sky.hpp

@@ -38,6 +38,8 @@ namespace MWRender
         void setVisible(const bool visible);
         void setRenderQueue(unsigned int id);
         
+        Ogre::SceneNode* getNode();
+        
     protected:
         virtual void init(const Ogre::String& textureName,
                         const unsigned int size,
@@ -128,6 +130,9 @@ namespace MWRender
         
         void setWeather(const MWWorld::WeatherResult& weather);
         
+        void setGlare(bool glare);
+        Ogre::Vector3 getRealSunPos();
+        
     private:
         BillboardObject* mSun;
         BillboardObject* mSunGlare;
@@ -156,6 +161,8 @@ namespace MWRender
         float mRemainingTransitionTime;
         
         void ModVertexAlpha(Ogre::Entity* ent, unsigned int meshType);
+        
+        bool mEnabled;
     };
 }
 

apps/openmw/mwworld/physicssystem.cpp

@@ -51,6 +51,17 @@ namespace MWWorld
         return mEngine->rayTest(from,to);
     }
     
+    bool PhysicsSystem::castRay(const Vector3& from, const Vector3& to)
+    {
+        btVector3 _from, _to;
+        _from = btVector3(from.x, from.y, from.z);
+        _to = btVector3(to.x, to.y, to.z);
+        
+        std::pair<std::string, float> result = mEngine->rayTest(_from, _to);
+        
+        return !(result.first == "");
+    }
+
 
     std::vector< std::pair<std::string, Ogre::Vector3> > PhysicsSystem::doPhysics (float duration,
         const std::vector<std::pair<std::string, Ogre::Vector3> >& actors)

apps/openmw/mwworld/physicssystem.hpp

@@ -33,8 +33,12 @@ namespace MWWorld
             void scaleObject (const std::string& handle, float scale);
 
             bool toggleCollisionMode();
+            
             std::pair<std::string, float> getFacedHandle (MWWorld::World& world);
             
+            // cast ray, return true if it hit something
+            bool castRay(const Ogre::Vector3& from, const Ogre::Vector3& to);
+
             void insertObjectPhysics(const MWWorld::Ptr& ptr, std::string model);
 
             void insertActorPhysics(const MWWorld::Ptr&, std::string model);

apps/openmw/mwworld/world.cpp

@@ -24,6 +24,9 @@
 #include "globals.hpp"
 #include "cellfunctors.hpp"
 
+#include <OgreVector3.h>
+using namespace Ogre;
+
 namespace
 {
     template<typename T>
@@ -413,6 +416,8 @@ namespace MWWorld
         mRendering->skySetDate (day, month);
         
         mWeatherManager->setDate (day, month);
+        
+        
     }
 
     void World::setMonth (int month)
@@ -699,6 +704,14 @@ namespace MWWorld
         mWorldScene->update (duration);
         
         mWeatherManager->update (duration);
+        
+        // cast a ray from player to sun to detect if the sun is visible
+        // this is temporary until we find a better place to put this code
+        // currently its here because we need to access the physics system
+        float* p = mPlayer->getPlayer().getRefData().getPosition().pos;
+        Vector3 sun = mRendering->getSkyManager()->getRealSunPos();
+        sun = Vector3(sun.x, -sun.z, sun.y);
+        mRendering->getSkyManager()->setGlare(!mPhysics->castRay(Ogre::Vector3(p[0], p[1], p[2]), sun));
     }
     
     bool World::isCellExterior() const