From e04100606358f065fc455b883cc253d0f73984af Mon Sep 17 00:00:00 2001
From: Jason Hooks <Hooks@.(none)>
Date: Thu, 3 Nov 2011 23:47:15 -0400
Subject: [PATCH] Adding light and fog functions

---
 apps/openmw/mwrender/renderingmanager.cpp | 67 +++++++++++++++++++++++
 apps/openmw/mwrender/renderingmanager.hpp | 12 +++-
 2 files changed, 78 insertions(+), 1 deletion(-)

diff --git a/apps/openmw/mwrender/renderingmanager.cpp b/apps/openmw/mwrender/renderingmanager.cpp
index 952388fd4..b07251f53 100644
--- a/apps/openmw/mwrender/renderingmanager.cpp
+++ b/apps/openmw/mwrender/renderingmanager.cpp
@@ -154,4 +154,71 @@ bool RenderingManager::toggleRenderMode(int mode){
 	return mDebugging.toggleRenderMode(mode);
 }
 
+void RenderingManager::configureFog(ESMS::CellStore<MWWorld::RefData> &mCell)
+{
+  Ogre::ColourValue color;
+  color.setAsABGR (mCell.cell->ambi.fog);
+
+  float high = 4500 + 9000 * (1-mCell.cell->ambi.fogDensity);
+  float low = 200;
+
+  rend.getScene()->setFog (FOG_LINEAR, color, 0, low, high);
+  rend.getCamera()->setFarClipDistance (high + 10);
+  rend.getViewport()->setBackgroundColour (color);
+}
+
+void RenderingManager::setAmbientMode()
+{
+  switch (mAmbientMode)
+  {
+    case 0:
+
+      rend.getScene()->setAmbientLight(mAmbientColor);
+      break;
+
+    case 1:
+
+      rend.getScene()->setAmbientLight(0.7f*mAmbientColor + 0.3f*ColourValue(1,1,1));
+      break;
+
+    case 2:
+
+      rend.getScene()->setAmbientLight(ColourValue(1,1,1));
+      break;
+  }
+}
+
+void RenderingManager::configureAmbient(ESMS::CellStore<MWWorld::RefData> &mCell)
+{
+  mAmbientColor.setAsABGR (mCell.cell->ambi.ambient);
+  setAmbientMode();
+
+  // Create a "sun" that shines light downwards. It doesn't look
+  // completely right, but leave it for now.
+  Ogre::Light *light = rend.getScene()->createLight();
+  Ogre::ColourValue colour;
+  colour.setAsABGR (mCell.cell->ambi.sunlight);
+  light->setDiffuseColour (colour);
+  light->setType(Ogre::Light::LT_DIRECTIONAL);
+  light->setDirection(0,-1,0);
+}
+// Switch through lighting modes.
+
+void RenderingManager::toggleLight()
+{
+  if (mAmbientMode==2)
+    mAmbientMode = 0;
+  else
+    ++mAmbientMode;
+
+  switch (mAmbientMode)
+  {
+    case 0: std::cout << "Setting lights to normal\n"; break;
+    case 1: std::cout << "Turning the lights up\n"; break;
+    case 2: std::cout << "Turning the lights to full\n"; break;
+  }
+
+  setAmbientMode();
+}
+
 }
diff --git a/apps/openmw/mwrender/renderingmanager.hpp b/apps/openmw/mwrender/renderingmanager.hpp
index e8989d740..0d2375feb 100644
--- a/apps/openmw/mwrender/renderingmanager.hpp
+++ b/apps/openmw/mwrender/renderingmanager.hpp
@@ -57,6 +57,8 @@ class RenderingManager: private RenderingInterface {
     virtual MWRender::Creatures& getCreatures();
     virtual MWRender::Objects& getObjects();
     virtual MWRender::Player& getPlayer();
+
+	void toggleLight();
 	bool toggleRenderMode(int mode);
 
     void removeCell (MWWorld::Ptr::CellStore *store); // TODO do we want this?
@@ -86,7 +88,10 @@ class RenderingManager: private RenderingInterface {
 	Ogre::SceneNode *getRoot() { return mwRoot; }
     
   private:
-    
+    void configureAmbient(ESMS::CellStore<MWWorld::RefData> &mCell);
+		 /// configure fog according to cell
+    void configureFog(ESMS::CellStore<MWWorld::RefData> &mCell);
+    void setAmbientMode();
     SkyManager* mSkyManager;
 	 OEngine::Render::OgreRenderer &rend;
 	 Ogre::Camera* camera;
@@ -94,6 +99,11 @@ class RenderingManager: private RenderingInterface {
 	 MWRender::Creatures creatures;
 	 MWRender::Objects objects;
 
+	// 0 normal, 1 more bright, 2 max
+    int mAmbientMode;
+
+    Ogre::ColourValue mAmbientColor;
+
         /// Root node for all objects added to the scene. This is rotated so
         /// that the OGRE coordinate system matches that used internally in
         /// Morrowind.