Camera raycast

apps/openmw/mwphysics/physicssystem.cpp

@@ -7,6 +7,7 @@
 
 #include <BulletCollision/CollisionShapes/btHeightfieldTerrainShape.h>
 #include <BulletCollision/CollisionShapes/btConeShape.h>
+#include <BulletCollision/CollisionShapes/btSphereShape.h>
 #include <BulletCollision/CollisionShapes/btStaticPlaneShape.h>
 #include <BulletCollision/CollisionShapes/btCompoundShape.h>
 #include <BulletCollision/CollisionDispatch/btCollisionObject.h>
@@ -778,6 +779,30 @@ namespace MWPhysics
         return result;
     }
 
+    PhysicsSystem::RayResult PhysicsSystem::castSphere(const osg::Vec3f &from, const osg::Vec3f &to, float radius)
+    {
+        btCollisionWorld::ClosestConvexResultCallback callback(toBullet(from), toBullet(to));
+        callback.m_collisionFilterGroup = 0xff;
+        callback.m_collisionFilterMask = CollisionType_World|CollisionType_HeightMap;
+
+        btSphereShape shape(radius);
+        const btQuaternion btrot = btQuaternion::getIdentity();
+
+        btTransform from_ (btrot, toBullet(from));
+        btTransform to_ (btrot, toBullet(to));
+
+        mCollisionWorld->convexSweepTest(&shape, from_, to_, callback);
+
+        RayResult result;
+        result.mHit = callback.hasHit();
+        if (result.mHit)
+        {
+            result.mHitPos = toOsg(callback.m_hitPointWorld);
+            result.mHitNormal = toOsg(callback.m_hitNormalWorld);
+        }
+        return result;
+    }
+
     bool PhysicsSystem::getLineOfSight(const MWWorld::Ptr &actor1, const MWWorld::Ptr &actor2)
     {
         Actor* physactor1 = getActor(actor1);

apps/openmw/mwphysics/physicssystem.hpp

@@ -101,6 +101,8 @@ namespace MWPhysics
             RayResult castRay(const osg::Vec3f &from, const osg::Vec3f &to, MWWorld::Ptr ignore = MWWorld::Ptr(), int mask =
                     CollisionType_World|CollisionType_HeightMap|CollisionType_Actor);
 
+            RayResult castSphere(const osg::Vec3f& from, const osg::Vec3f& to, float radius);
+
             /// Return true if actor1 can see actor2.
             bool getLineOfSight(const MWWorld::Ptr& actor1, const MWWorld::Ptr& actor2);
 

apps/openmw/mwrender/camera.cpp

@@ -80,21 +80,28 @@ namespace MWRender
         return mTrackingPtr;
     }
 
-    void Camera::updateCamera(osg::Camera *cam)
+    osg::Vec3d Camera::getFocalPoint()
     {
-        if (mTrackingPtr.isEmpty())
-            return;
         const osg::Node* trackNode = mTrackingNode;
         if (!trackNode)
-            return;
+            return osg::Vec3d();
         osg::MatrixList mats = trackNode->getWorldMatrices();
         if (!mats.size())
-            return;
+            return osg::Vec3d();
         const osg::Matrix& worldMat = mats[0];
 
         osg::Vec3d position = worldMat.getTrans();
         if (!isFirstPerson())
             position.z() += mHeight;
+        return position;
+    }
+
+    void Camera::updateCamera(osg::Camera *cam)
+    {
+        if (mTrackingPtr.isEmpty())
+            return;
+
+        osg::Vec3d position = getFocalPoint();
 
         osg::Quat orient =  osg::Quat(getPitch(), osg::Vec3d(1,0,0)) * osg::Quat(getYaw(), osg::Vec3d(0,0,1));
 
@@ -373,12 +380,14 @@ namespace MWRender
         rotateCamera(getPitch(), getYaw(), false);
     }
 
-    void Camera::getPosition(osg::Vec3 &focal, osg::Vec3 &camera)
+    void Camera::getPosition(osg::Vec3f &focal, osg::Vec3f &camera)
     {
-        //mCamera->getParentSceneNode()->needUpdate(true);
+        focal = getFocalPoint();
 
-        //camera = mCamera->getRealPosition();
-        //focal = mCameraNode->_getDerivedPosition();
+        osg::Quat orient =  osg::Quat(getPitch(), osg::Vec3d(1,0,0)) * osg::Quat(getYaw(), osg::Vec3d(0,0,1));
+
+        osg::Vec3d offset = orient * osg::Vec3d(0, -mCameraDistance, 0);
+        camera = focal + offset;
     }
 
     void Camera::togglePlayerLooking(bool enable)

apps/openmw/mwrender/camera.hpp

@@ -5,6 +5,7 @@
 
 #include <osg/ref_ptr>
 #include <osg/Vec3>
+#include <osg/Vec3d>
 
 #include "../mwworld/ptr.hpp"
 
@@ -113,8 +114,10 @@ namespace MWRender
 
         void setAnimation(NpcAnimation *anim);
 
+        osg::Vec3d getFocalPoint();
+
         /// Stores focal and camera world positions in passed arguments
-        void getPosition(osg::Vec3 &focal, osg::Vec3 &camera);
+        void getPosition(osg::Vec3f &focal, osg::Vec3f &camera);
 
         void togglePlayerLooking(bool enable);
 

apps/openmw/mwrender/renderingmanager.cpp

@@ -514,6 +514,11 @@ namespace MWRender
         }
     }
 
+    float RenderingManager::getNearClipDistance() const
+    {
+        return mNearClip;
+    }
+
     bool RenderingManager::vanityRotateCamera(const float *rot)
     {
         if(!mCamera->isVanityOrPreviewModeEnabled())

apps/openmw/mwrender/renderingmanager.hpp

@@ -113,6 +113,8 @@ namespace MWRender
 
         void processChangedSettings(const Settings::CategorySettingVector& settings);
 
+        float getNearClipDistance() const;
+
         // camera stuff
         bool vanityRotateCamera(const float *rot);
         void setCameraDistance(float dist, bool adjust, bool override);

apps/openmw/mwworld/worldimp.cpp

@@ -1617,6 +1617,19 @@ namespace MWWorld
 
         int blind = static_cast<int>(player.getClass().getCreatureStats(player).getMagicEffects().get(ESM::MagicEffect::Blind).getMagnitude());
         MWBase::Environment::get().getWindowManager()->setBlindness(std::max(0, std::min(100, blind)));
+
+
+        mRendering->getCamera()->setCameraDistance();
+        if(!mRendering->getCamera()->isFirstPerson())
+        {
+            osg::Vec3f focal, camera;
+            mRendering->getCamera()->getPosition(focal, camera);
+            float radius = mRendering->getNearClipDistance()*2.5f;
+            MWPhysics::PhysicsSystem::RayResult result = mPhysics->castSphere(focal, camera, radius);
+            if (result.mHit)
+                mRendering->getCamera()->setCameraDistance((result.mHitPos - focal).length() - radius, false, false);
+        }
+
     }
 
     void World::updateSoundListener()