diff --git a/sdlpp/sdlpp_circlecolider.cpp b/sdlpp/sdlpp_circlecolider.cpp
index 6693f31..5c24915 100644
--- a/sdlpp/sdlpp_circlecolider.cpp
+++ b/sdlpp/sdlpp_circlecolider.cpp
@@ -7,6 +7,13 @@ CircleColider::CircleColider( double x, double y, double rad )
 
 CircleColider::CircleColider( const Vec2D< double > &center, double rad )
         : CollisionPolygon( center ), original_rad( rad ) {}
+CircleColider::CircleColider( double x, double y, double rad, uint64_t id )
+        : CircleColider( { x, y }, rad, id ) {}
+CircleColider::CircleColider( const Vec2D< double > &center, double rad,
+                              uint64_t id )
+        : CircleColider( center, rad ) {
+    _id = id;
+}
 
 bool CircleColider::colidesWith( const SDLPP::CollisionPolygon &other ) const {
     if ( other.isCircle() ) {
@@ -47,9 +54,11 @@ int CircleColider::rightmost() const {
     return getX() + rad_;
 }
 
-void CircleColider::updateCollision( int x, int y, int w, int h ) {
+void CircleColider::updateCollision( int x, int y, int w, int h, uint64_t id ) {
     position = Vec2D< int >( original.getX() * w + x, original.getY() * h + y );
     rad_ = original_rad * w;
+    if ( _id == static_cast< uint64_t >( -1 ) )
+        _id = id;
 }
 
 void CircleColider::render( Renderer &renderer, const SDL_Color &color,
diff --git a/sdlpp/sdlpp_circlecolider.hpp b/sdlpp/sdlpp_circlecolider.hpp
index ec9364d..a2f0ee5 100644
--- a/sdlpp/sdlpp_circlecolider.hpp
+++ b/sdlpp/sdlpp_circlecolider.hpp
@@ -11,6 +11,8 @@ class SDLPPSCOPE CircleColider : public CollisionPolygon {
 public:
     CircleColider( double x, double y, double rad );
     CircleColider( const Vec2D< double > &center, double rad );
+    CircleColider( double x, double y, double rad, uint64_t id );
+    CircleColider( const Vec2D< double > &center, double rad, uint64_t id );
     virtual ~CircleColider() {}
 
     virtual bool colidesWith( const CollisionPolygon &other ) const override;
@@ -20,7 +22,8 @@ public:
     virtual int leftmost() const override;
     virtual int rightmost() const override;
 
-    virtual void updateCollision( int x, int y, int w, int h ) override;
+    virtual void updateCollision( int x, int y, int w, int h,
+                                  uint64_t id ) override;
     virtual void render( Renderer &renderer, const SDL_Color &color,
                          const SDL_Color &outline_color ) override;
     virtual void render( Renderer &renderer, const SDL_Color &color ) override;
diff --git a/sdlpp/sdlpp_circlerenderer.cpp b/sdlpp/sdlpp_circlerenderer.cpp
index 10f61a9..c2ea5e8 100644
--- a/sdlpp/sdlpp_circlerenderer.cpp
+++ b/sdlpp/sdlpp_circlerenderer.cpp
@@ -49,7 +49,8 @@ void CircleRender::setColor( const std::string &color ) {
     if ( !polygon ) {
         polygon = std::make_shared< CircleColider >( 0, 0, 1 );
         polygon->updateCollision( collisionPushX(), collisionPushY(),
-                                  collisionWidth(), collisionHeight() );
+                                  collisionWidth(), collisionHeight(),
+                                  getId() );
     }
     polygon->setColor( color );
 }
@@ -58,7 +59,8 @@ void CircleRender::setOutlineColor( const std::string &color ) {
     if ( !polygon ) {
         polygon = std::make_shared< CircleColider >( 0, 0, 1 );
         polygon->updateCollision( collisionPushX(), collisionPushY(),
-                                  collisionWidth(), collisionHeight() );
+                                  collisionWidth(), collisionHeight(),
+                                  getId() );
     }
     polygon->setOutlineColor( color );
 }
@@ -110,10 +112,11 @@ void CircleRender::updateSizeAndPosition() {
     rect.h = std::round( ( current.getY() + r_ ) * dimension ) - rect.y;
     if ( polygon )
         polygon->updateCollision( collisionPushX(), collisionPushY(),
-                                  collisionWidth(), collisionHeight() );
+                                  collisionWidth(), collisionHeight(),
+                                  getId() );
     for ( auto &x : collisions ) {
         x->updateCollision( collisionPushX(), collisionPushY(),
-                            collisionWidth(), collisionHeight() );
+                            collisionWidth(), collisionHeight(), getId() );
     }
 }
 
diff --git a/sdlpp/sdlpp_collision.cpp b/sdlpp/sdlpp_collision.cpp
index 187554a..63ad7e1 100644
--- a/sdlpp/sdlpp_collision.cpp
+++ b/sdlpp/sdlpp_collision.cpp
@@ -9,6 +9,12 @@ CollisionPolygon::CollisionPolygon( const Vec2D< double > &input ) {
     original = input;
     position = { 0, 0 };
 }
+CollisionPolygon::CollisionPolygon( double x, double y, uint64_t id )
+        : CollisionPolygon( Vec2D< double >( x, y ), id ) {}
+CollisionPolygon::CollisionPolygon( const Vec2D< double > &input, uint64_t id )
+        : CollisionPolygon( input ) {
+    _id = id;
+}
 
 bool CollisionPolygon::isInfinite() const {
     return infinite;
@@ -17,7 +23,10 @@ void CollisionPolygon::setInfinite() {
     infinite = true;
 }
 
-void CollisionPolygon::updateCollision( int x, int y, int w, int h ) {
+void CollisionPolygon::updateCollision( int x, int y, int w, int h,
+                                        uint64_t id ) {
+    if ( _id == static_cast< uint64_t >( -1 ) )
+        _id = id;
     position = Vec2D< int >( original.getX() * w + x, original.getY() * h + y );
 }
 
@@ -34,6 +43,12 @@ void CollisionPolygon::setColor( const std::string &color ) {
 void CollisionPolygon::setOutlineColor( const std::string &color ) {
     sdl_outline = getSDLColorHEX( color );
 }
+void CollisionPolygon::setId( uint64_t id ) {
+    _id = id;
+}
+uint64_t CollisionPolygon::getId() {
+    return _id;
+}
 
 bool infinityIntersection( const SDLPP::CollisionPolygon &infinite,
                            const SDLPP::CollisionPolygon &other ) {
diff --git a/sdlpp/sdlpp_collision.hpp b/sdlpp/sdlpp_collision.hpp
index 2193443..c330a04 100644
--- a/sdlpp/sdlpp_collision.hpp
+++ b/sdlpp/sdlpp_collision.hpp
@@ -13,6 +13,8 @@ class SDLPPSCOPE CollisionPolygon {
 public:
     CollisionPolygon( double x, double y );
     CollisionPolygon( const Vec2D< double > &input );
+    CollisionPolygon( double x, double y, uint64_t id );
+    CollisionPolygon( const Vec2D< double > &input, uint64_t id );
     virtual ~CollisionPolygon() {}
     virtual bool colidesWith( const CollisionPolygon &other ) const = 0;
     virtual bool isCircle() const = 0;
@@ -22,7 +24,8 @@ public:
     virtual int bottommost() const = 0;
     virtual int leftmost() const = 0;
     virtual int rightmost() const = 0;
-    virtual void updateCollision( int x, int y, int w, int h );
+    virtual void updateCollision( int x, int y, int w, int h,
+                                  uint64_t objectId );
     virtual void render( Renderer &renderer, const SDL_Color &color,
                          const SDL_Color &outline_color ) = 0;
     virtual void render( Renderer &renderer, const SDL_Color &color ) = 0;
@@ -33,6 +36,8 @@ public:
     void setOutlineColor( const std::string &color );
     virtual std::shared_ptr< CollisionPolygon > copySelf() = 0;
     virtual std::vector< Line< int > > getLines() const = 0;
+    uint64_t getId();
+    void setId( uint64_t id );
 
 protected:
     Vec2D< double > original;
@@ -40,6 +45,7 @@ protected:
     bool infinite = false;
     SDL_Color sdl_color = { 0, 0, 0, 0 };
     SDL_Color sdl_outline = { 0, 0, 0, 0 };
+    uint64_t _id = -1;
 };
 
 SDLPPSCOPE bool infinityIntersection( const SDLPP::CollisionPolygon &infinite,
diff --git a/sdlpp/sdlpp_linerenderer.cpp b/sdlpp/sdlpp_linerenderer.cpp
index 06c184b..3f1a3ae 100644
--- a/sdlpp/sdlpp_linerenderer.cpp
+++ b/sdlpp/sdlpp_linerenderer.cpp
@@ -94,7 +94,7 @@ void LineRenderer::updateSizeAndPosition() {
                       std::round( current.getEnd().getY() * dimension ) ) );
     for ( auto &x : collisions ) {
         x->updateCollision( collisionPushX(), collisionPushY(),
-                            collisionWidth(), collisionHeight() );
+                            collisionWidth(), collisionHeight(), getId() );
     }
 }
 void LineRenderer::centerX() {
diff --git a/sdlpp/sdlpp_rectcolider.cpp b/sdlpp/sdlpp_rectcolider.cpp
index 658046b..06b2cd3 100644
--- a/sdlpp/sdlpp_rectcolider.cpp
+++ b/sdlpp/sdlpp_rectcolider.cpp
@@ -25,6 +25,15 @@ RectColider::RectColider( const Vec2D< double > &top_left,
                           const Vec2D< double > &size )
         : CollisionPolygon( top_left ), _size( size ) {}
 
+RectColider::RectColider( double x, double y, double w, double h, uint64_t id )
+        : RectColider( { x, y }, { w, h }, id ) {}
+
+RectColider::RectColider( const Vec2D< double > &top_left,
+                          const Vec2D< double > &size, uint64_t id )
+        : RectColider( top_left, size ) {
+    _id = id;
+}
+
 bool RectColider::colidesWith( const SDLPP::CollisionPolygon &other ) const {
     if ( other.isCircle() ) {
         return other.colidesWith( *this );
@@ -57,9 +66,11 @@ int RectColider::rightmost() const {
            isInfinite() * -1;
 }
 
-void RectColider::updateCollision( int x, int y, int w, int h ) {
+void RectColider::updateCollision( int x, int y, int w, int h, uint64_t id ) {
     position = Vec2D< int >( original.getX() * w + x, original.getY() * h + y );
     _size_pixel = Vec2D< int >( width() * w, height() * h );
+    if ( _id == static_cast< uint64_t >( -1 ) )
+        _id = id;
 }
 
 void RectColider::render( Renderer &renderer, const SDL_Color &color,
diff --git a/sdlpp/sdlpp_rectcolider.hpp b/sdlpp/sdlpp_rectcolider.hpp
index 1784d0a..89cfb0c 100644
--- a/sdlpp/sdlpp_rectcolider.hpp
+++ b/sdlpp/sdlpp_rectcolider.hpp
@@ -14,6 +14,9 @@ class SDLPPSCOPE RectColider : public CollisionPolygon {
 public:
     RectColider( double x, double y, double w, double h );
     RectColider( const Vec2D< double > &top_left, const Vec2D< double > &size );
+    RectColider( double x, double y, double w, double h, uint64_t id );
+    RectColider( const Vec2D< double > &top_left, const Vec2D< double > &size,
+                 uint64_t id );
     virtual ~RectColider() {}
     virtual bool colidesWith( const CollisionPolygon &other ) const override;
     virtual bool isCircle() const override;
@@ -21,7 +24,8 @@ public:
     virtual int bottommost() const override;
     virtual int leftmost() const override;
     virtual int rightmost() const override;
-    virtual void updateCollision( int x, int y, int w, int h ) override;
+    virtual void updateCollision( int x, int y, int w, int h,
+                                  uint64_t id ) override;
     virtual void render( Renderer &renderer, const SDL_Color &color,
                          const SDL_Color &outline_color ) override;
     virtual void render( Renderer &renderer, const SDL_Color &color ) override;
diff --git a/sdlpp/sdlpp_rectrenderer.cpp b/sdlpp/sdlpp_rectrenderer.cpp
index f747279..c2ba730 100644
--- a/sdlpp/sdlpp_rectrenderer.cpp
+++ b/sdlpp/sdlpp_rectrenderer.cpp
@@ -93,7 +93,8 @@ void RectangleRender::setColor( const std::string &color ) {
     if ( !polygon ) {
         polygon = std::make_shared< RectColider >( 0, 0, 1, 1 );
         polygon->updateCollision( collisionPushX(), collisionPushY(),
-                                  collisionWidth(), collisionHeight() );
+                                  collisionWidth(), collisionHeight(),
+                                  getId() );
     }
     polygon->setColor( color );
 }
@@ -101,7 +102,8 @@ void RectangleRender::setOutlineColor( const std::string &color ) {
     if ( !polygon ) {
         polygon = std::make_shared< RectColider >( 0, 0, 1, 1 );
         polygon->updateCollision( collisionPushX(), collisionPushY(),
-                                  collisionWidth(), collisionHeight() );
+                                  collisionWidth(), collisionHeight(),
+                                  getId() );
     }
     polygon->setOutlineColor( color );
 }
@@ -146,10 +148,11 @@ void RectangleRender::updateSizeAndPosition() {
         rect.y;
     if ( polygon )
         polygon->updateCollision( collisionPushX(), collisionPushY(),
-                                  collisionWidth(), collisionHeight() );
+                                  collisionWidth(), collisionHeight(),
+                                  getId() );
     for ( auto &x : collisions ) {
         x->updateCollision( collisionPushX(), collisionPushY(),
-                            collisionWidth(), collisionHeight() );
+                            collisionWidth(), collisionHeight(), getId() );
     }
 }
 SDL_Rect RectangleRender::getRect() {
diff --git a/sdlpp/sdlpp_renderer.cpp b/sdlpp/sdlpp_renderer.cpp
index 24abb52..3f22e03 100644
--- a/sdlpp/sdlpp_renderer.cpp
+++ b/sdlpp/sdlpp_renderer.cpp
@@ -22,6 +22,13 @@ Vec2D< int > Renderer::getDimensions() const {
     SDL_GetRendererOutputSize( renderer, &width, &height );
     return { width, height };
 }
+Vec2D< double > Renderer::getDoubleDimensions() const {
+    auto dimensions = getDimensions();
+    double smaller = dimensions.getX() < dimensions.getY() ? dimensions.getX()
+                                                           : dimensions.getY();
+    return { static_cast< double >( dimensions.getX() ) / smaller,
+             static_cast< double >( dimensions.getY() ) / smaller };
+}
 int Renderer::getWidth() const {
     return getDimensions().getX();
 }
diff --git a/sdlpp/sdlpp_renderer.hpp b/sdlpp/sdlpp_renderer.hpp
index b5a3186..4c61541 100644
--- a/sdlpp/sdlpp_renderer.hpp
+++ b/sdlpp/sdlpp_renderer.hpp
@@ -24,6 +24,7 @@ public:
     bool getRenderColiders();
     void clearRenderer();
     void presentRenderer();
+    Vec2D< double > getDoubleDimensions() const;
 
 private:
     SDL_Renderer *renderer = NULL;
diff --git a/sdlpp/sdlpp_renderobject.cpp b/sdlpp/sdlpp_renderobject.cpp
index 142122c..1e43945 100644
--- a/sdlpp/sdlpp_renderobject.cpp
+++ b/sdlpp/sdlpp_renderobject.cpp
@@ -41,18 +41,20 @@ void RenderObject::setPos( const Vec2D< double > &vec ) {
 Vec2D< double > RenderObject::getPos() const {
     return original;
 }
-bool RenderObject::colidesWith( const RenderObject &other ) const {
+std::vector< uint64_t >
+RenderObject::colidesWith( const RenderObject &other ) const {
     if ( !hasCollisions() || !other.hasCollisions() || getHidden() ||
          other.getHidden() ) {
-        return false;
+        return {};
     }
+    std::vector< uint64_t > ret = {};
     for ( const auto &x : collisions ) {
         for ( const auto &y : other.getCollisions() ) {
             if ( x->colidesWith( *y ) )
-                return true;
+                ret.push_back( x->getId() );
         }
     }
-    return false;
+    return ret;
 }
 bool RenderObject::hasCollisions() const {
     return !collisions.empty();
diff --git a/sdlpp/sdlpp_renderobject.hpp b/sdlpp/sdlpp_renderobject.hpp
index d975301..cb8b77a 100644
--- a/sdlpp/sdlpp_renderobject.hpp
+++ b/sdlpp/sdlpp_renderobject.hpp
@@ -34,12 +34,12 @@ public:
     virtual void setPos( const std::pair< double, double > &pos );
     virtual void setPos( const Vec2D< double > &vec );
     virtual Vec2D< double > getPos() const;
-    bool colidesWith( const RenderObject &other ) const;
+    std::vector< uint64_t > colidesWith( const RenderObject &other ) const;
     template < class T > void addCollision( const T &p ) {
         collisions.push_back( std::make_shared< T >( p ) );
         collisions.back()->updateCollision( collisionPushX(), collisionPushY(),
-                                            collisionWidth(),
-                                            collisionHeight() );
+                                            collisionWidth(), collisionHeight(),
+                                            getId() );
     }
     bool hasCollisions() const;
     const std::vector< std::shared_ptr< CollisionPolygon > > &
diff --git a/sdlpp/sdlpp_scene.cpp b/sdlpp/sdlpp_scene.cpp
index d57df2c..946918e 100644
--- a/sdlpp/sdlpp_scene.cpp
+++ b/sdlpp/sdlpp_scene.cpp
@@ -20,11 +20,15 @@ void Scene::addObject( const std::shared_ptr< RenderObject > &obj ) {
     } else {
         auto rect = obj->getDoubleRect();
         auto leftmost_rect = leftmost_obj->getDoubleRect();
-        if ( rect.first.getX() < leftmost_rect.first.getX() )
+        if ( ( rect.first.getX() < leftmost_rect.first.getX() &&
+               !obj->getPermanent() ) ||
+             ( leftmost_obj->getPermanent() && !obj->getPermanent() ) )
             leftmost_obj = obj;
         auto rightmost_rect = rightmost_obj->getDoubleRect();
-        if ( rect.first.getX() + rect.second.getX() >
-             rightmost_rect.first.getX() + rightmost_rect.second.getX() )
+        if ( ( rect.first.getX() + rect.second.getX() >
+                   rightmost_rect.first.getX() + rightmost_rect.second.getX() &&
+               !obj->getPermanent() ) ||
+             ( rightmost_obj->getPermanent() && !obj->getPermanent() ) )
             rightmost_obj = obj;
     }
 }
@@ -95,33 +99,35 @@ void Scene::updateScene() {
     }
     prev_ticks = now_ticks;
 }
-std::vector< std::shared_ptr< RenderObject > >
+std::vector< std::pair< uint64_t, std::shared_ptr< RenderObject > > >
 Scene::getCollisions( RenderObject &r ) {
     if ( r.getHidden() )
         return {};
-    std::vector< std::shared_ptr< RenderObject > > ret{};
+    std::vector< std::pair< uint64_t, std::shared_ptr< RenderObject > > > ret{};
     for ( const auto &x : collision_objects ) {
-        if ( x->colidesWith( r ) ) {
-            ret.push_back( x );
+        for ( auto id : r.colidesWith( *x ) ) {
+            ret.emplace_back( id, x );
         }
     }
     return ret;
 }
 void Scene::visitCollisions( RenderObject &r, Visitor &v ) {
-    for(auto &collision : getCollisions(r)) {
-        collision->visit(v);
+    for ( auto &collision : getCollisions( r ) ) {
+        v.fromId( collision.first );
+        collision.second->visit( v );
     }
 }
-std::vector< std::shared_ptr< RenderObject > >
+std::vector< std::pair< uint64_t, std::shared_ptr< RenderObject > > >
 Scene::getCollisions( RenderObject &r,
                       const std::unordered_set< int > &objectIDs ) {
     if ( r.getHidden() )
         return {};
-    std::vector< std::shared_ptr< RenderObject > > ret{};
+    std::vector< std::pair< uint64_t, std::shared_ptr< RenderObject > > > ret{};
     for ( const auto &x : collision_objects ) {
-        if ( objectIDs.find( x->getId() ) != objectIDs.end() &&
-             x->colidesWith( r ) ) {
-            ret.push_back( x );
+        if ( objectIDs.find( x->getId() ) != objectIDs.end() ) {
+            for ( auto id : r.colidesWith( *x ) ) {
+                ret.push_back( { id, x } );
+            }
         }
     }
     return ret;
@@ -154,7 +160,8 @@ void Scene::updateSizeAndPosition() {
         x->updateSizeAndPosition();
         for ( auto &col : x->getCollisions() ) {
             col->updateCollision( x->collisionPushX(), x->collisionPushY(),
-                                  x->collisionWidth(), x->collisionHeight() );
+                                  x->collisionWidth(), x->collisionHeight(),
+                                  x->getId() );
         }
     }
 }
@@ -164,8 +171,7 @@ void Scene::moveEverything( double x, double y ) {
     for ( auto &obj : render_objects ) {
         if ( obj->getPermanent() )
             continue;
-        auto curPos = obj->getDoubleRect();
-        obj->setPos( curPos.first.getX() + x, curPos.first.getY() + y );
+        obj->setPos( obj->getDoubleRect().first + Vec2D< double >( x, y ) );
     }
 }
 const std::shared_ptr< RenderObject > &Scene::leftmost() {
diff --git a/sdlpp/sdlpp_scene.hpp b/sdlpp/sdlpp_scene.hpp
index 035b881..096e482 100644
--- a/sdlpp/sdlpp_scene.hpp
+++ b/sdlpp/sdlpp_scene.hpp
@@ -27,10 +27,10 @@ public:
     std::vector< std::shared_ptr< RenderObject > >
     getObjects( const std::unordered_set< int > &objectIDs );
     void updateScene();
-    std::vector< std::shared_ptr< RenderObject > >
+    std::vector< std::pair< uint64_t, std::shared_ptr< RenderObject > > >
     getCollisions( RenderObject &r );
     void visitCollisions( RenderObject &r, Visitor &v );
-    std::vector< std::shared_ptr< RenderObject > >
+    std::vector< std::pair< uint64_t, std::shared_ptr< RenderObject > > >
     getCollisions( RenderObject &r,
                    const std::unordered_set< int > &objectIDs );
     void renderScene( bool clear_renderer = true );
diff --git a/sdlpp/sdlpp_visitor.hpp b/sdlpp/sdlpp_visitor.hpp
index b88885e..8acb887 100644
--- a/sdlpp/sdlpp_visitor.hpp
+++ b/sdlpp/sdlpp_visitor.hpp
@@ -11,6 +11,7 @@ class SDLPPSCOPE Visitor {
 public:
     Visitor() {}
     virtual void visit( const RenderObject &obj ) = 0;
+    virtual void fromId( uint64_t id ) = 0;
 };
 
 } // namespace SDLPP