dropping on the ground

apps/openmw/mwworld/physicssystem.cpp

@@ -122,6 +122,22 @@ namespace MWWorld
         return !(result.first == "");
     }
 
+    std::pair<bool, Ogre::Vector3>
+    PhysicsSystem::castRay(const Ogre::Vector3 &orig, const Ogre::Vector3 &dir, float len)
+    {
+        Ogre::Ray ray = Ogre::Ray(orig, dir);
+        Ogre::Vector3 to = ray.getPoint(len);
+
+        btVector3 btFrom = btVector3(orig.x, orig.y, orig.z);
+        btVector3 btTo = btVector3(to.x, to.y, to.z);
+
+        std::pair<std::string, float> test = mEngine->rayTest(btFrom, btTo);
+        if (test.first == "") {
+            return std::make_pair(false, Ogre::Vector3());
+        }
+        return std::make_pair(true, ray.getPoint(len * test.second));
+    }
+
     std::pair<bool, Ogre::Vector3> PhysicsSystem::castRay(float mouseX, float mouseY)
     {
         Ogre::Ray ray = mRender.getCamera()->getCameraToViewportRay(

apps/openmw/mwworld/physicssystem.hpp

@@ -54,6 +54,9 @@ namespace MWWorld
             // cast ray, return true if it hit something
             bool castRay(const Ogre::Vector3& from, const Ogre::Vector3& to);
 
+            std::pair<bool, Ogre::Vector3>
+            castRay(const Ogre::Vector3 &orig, const Ogre::Vector3 &dir, float len);
+
             std::pair<bool, Ogre::Vector3> castRay(float mouseX, float mouseY);
             ///< cast ray from the mouse, return true if it hit something and the first result (in OGRE coordinates)
 

apps/openmw/mwworld/worldimp.cpp

@@ -1057,9 +1057,20 @@ namespace MWWorld
     {
         MWWorld::Ptr::CellStore* cell = getPlayer().getPlayer().getCell();
 
-        ESM::Position &pos =
+        ESM::Position pos =
             getPlayer().getPlayer().getRefData().getPosition();
 
+        Ogre::Vector3 orig =
+            Ogre::Vector3(pos.pos[0], pos.pos[1], pos.pos[2]);
+        Ogre::Vector3 dir = Ogre::Vector3(0, 0, -1);
+        
+        float len = (pos.pos[2] >= 0) ? pos.pos[2] : -pos.pos[2];
+        len += 100.0;
+
+        std::pair<bool, Ogre::Vector3> hit =
+            mPhysics->castRay(orig, dir, len);
+        pos.pos[2] = hit.second.z;
+
         /// \todo fix item dropping at player object center position
         placeObject(object, *cell, pos);
     }