diff --git a/CMakeLists.txt b/CMakeLists.txt
index f8a10b8..4d24c59 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -53,7 +53,7 @@ target_compile_options(common INTERFACE
 
 set(METHODS_PATH "./src/*/methods/*.cpp")
 
-set(VERSION "V8")
+set(VERSION "V9")
 
 file(GLOB_RECURSE METHODS_SRC "${METHODS_PATH}")
 add_executable(main${VERSION} ./src/testMain.cpp ${METHODS_SRC} )
diff --git a/README.md b/README.md
index 375d5b2..c8930a4 100644
--- a/README.md
+++ b/README.md
@@ -60,4 +60,4 @@ Per spostare l'intera scena si tiene premuto il tasto centrale del mouse.
 
 # Per lanciare:
 
-    ./build/bin/mainV8
+    ./build/bin/mainV9
diff --git a/src/collections/headers/collection_interface.hpp b/src/collections/headers/collection_interface.hpp
index 58ed5ac..db647de 100644
--- a/src/collections/headers/collection_interface.hpp
+++ b/src/collections/headers/collection_interface.hpp
@@ -13,7 +13,7 @@ struct collection{
 class CollectionInterface{
     public:
         virtual collection create(ReferencePlane plane) = 0;
-        virtual void update(sf::Clock cl) = 0;
+        virtual void update(sf::Clock cl, float multiplier) = 0;
         virtual bool setTransparency(float alpha) = 0; 
         virtual ~CollectionInterface(){};
 };
diff --git a/src/collections/headers/gamba.hpp b/src/collections/headers/gamba.hpp
index f848e95..2905913 100644
--- a/src/collections/headers/gamba.hpp
+++ b/src/collections/headers/gamba.hpp
@@ -15,7 +15,7 @@ class Gamba : public CollectionInterface {
         PieceInterface* getJointPiece();
         void setDirection(Direction dir);
         bool setTransparency(float alpha) override;
-        void update(sf::Clock cl)override {};
+        void update(sf::Clock cl, float multiplier)override {};
         float getZ_Acc();
 };
 
diff --git a/src/collections/headers/lower_body.hpp b/src/collections/headers/lower_body.hpp
index f7fb930..c9a31d4 100644
--- a/src/collections/headers/lower_body.hpp
+++ b/src/collections/headers/lower_body.hpp
@@ -33,7 +33,7 @@ protected:
 public:
     Lower_Body(rb::Vector3 pos, std::vector<gamba_data> data);
     ~Lower_Body();
-    void update(sf::Clock cl) override;
+    void update(sf::Clock cl, float multiplier) override;
     void setVisibility(bool c);
     bool setTransparency(float alpha) override;
     collection create(ReferencePlane plane) override;
diff --git a/src/collections/methods/lower_body.cpp b/src/collections/methods/lower_body.cpp
index 72d37ad..5703af0 100644
--- a/src/collections/methods/lower_body.cpp
+++ b/src/collections/methods/lower_body.cpp
@@ -76,7 +76,7 @@ bool Lower_Body::setTransparency(float alpha){
     return true;
 }
 
-void Lower_Body::update(sf::Clock cl){
+void Lower_Body::update(sf::Clock cl, float multiplier){
     float sxAcc = sx->getZ_Acc() ;
     float dxAcc = dx->getZ_Acc() ;
 
diff --git a/src/pieces/headers/caviglia.hpp b/src/pieces/headers/caviglia.hpp
index 23c5031..49f5e5d 100644
--- a/src/pieces/headers/caviglia.hpp
+++ b/src/pieces/headers/caviglia.hpp
@@ -14,7 +14,7 @@ class Caviglia : public PieceInterface{
         Caviglia(rb::Vector3 coords, _Float16 mass);
         ~Caviglia();
 
-        void update(sf::Clock cl) override;
+        void update(sf::Clock cl, float multiplier) override;
         sf::Shape* draw(ReferencePlane plane) override;
 };
 
diff --git a/src/pieces/headers/coscia.hpp b/src/pieces/headers/coscia.hpp
index 28b44e6..7921268 100644
--- a/src/pieces/headers/coscia.hpp
+++ b/src/pieces/headers/coscia.hpp
@@ -15,7 +15,7 @@ class Coscia : public PieceInterface{
         Coscia(rb::Vector3 coords, _Float16 mass);
         ~Coscia();
 
-        void update(sf::Clock cl) override;
+        void update(sf::Clock cl, float multiplier) override;
         sf::Shape* draw(ReferencePlane plane) override;
 };
 
diff --git a/src/pieces/headers/piece_interface.hpp b/src/pieces/headers/piece_interface.hpp
index fb4cfb2..a5d55cd 100644
--- a/src/pieces/headers/piece_interface.hpp
+++ b/src/pieces/headers/piece_interface.hpp
@@ -38,7 +38,7 @@ class PieceInterface{
         sf::Color color;
         float transparency = 1.0; //canale alpha del pezzo
 
-        virtual void update(sf::Clock cl) = 0;
+        virtual void update(sf::Clock cl, float multiplier) = 0;
         virtual sf::Shape* draw(ReferencePlane plane) = 0;
         virtual ~PieceInterface(){}
         virtual void setDirection(Direction dir){
diff --git a/src/pieces/headers/sensore.hpp b/src/pieces/headers/sensore.hpp
index 53cb173..0191993 100644
--- a/src/pieces/headers/sensore.hpp
+++ b/src/pieces/headers/sensore.hpp
@@ -29,7 +29,7 @@ class Sensore : public PieceInterface{
         Sensore(rb::Vector3 coords, _Float16 mass, unsigned int* st, std::vector<std::vector<float>> data);
         ~Sensore();
 
-        void update(sf::Clock cl) override;
+        void update(sf::Clock cl,float multiplier) override;
         sf::Shape* draw(ReferencePlane plane) override;
 
         //funzioni specifiche
diff --git a/src/pieces/headers/torso.hpp b/src/pieces/headers/torso.hpp
index 69a6ec6..59bbb73 100644
--- a/src/pieces/headers/torso.hpp
+++ b/src/pieces/headers/torso.hpp
@@ -14,7 +14,7 @@ class Torso : public PieceInterface{
         Torso(rb::Vector3 coords, _Float16 mass);
         ~Torso();
 
-        void update(sf::Clock cl) override;
+        void update(sf::Clock cl, float multiplier) override;
         sf::Shape* draw(ReferencePlane plane) override;
 };
 
diff --git a/src/pieces/methods/caviglia_class.cpp b/src/pieces/methods/caviglia_class.cpp
index a1ea29e..410532f 100644
--- a/src/pieces/methods/caviglia_class.cpp
+++ b/src/pieces/methods/caviglia_class.cpp
@@ -15,7 +15,7 @@ Caviglia::~Caviglia(){
     delete shapeYZ;
 }
 
-void Caviglia::update(sf::Clock cl){
+void Caviglia::update(sf::Clock cl,float multiplier){
     //body.step(cl);
 }
 
diff --git a/src/pieces/methods/coscia_class.cpp b/src/pieces/methods/coscia_class.cpp
index d8e0709..b63c0cb 100644
--- a/src/pieces/methods/coscia_class.cpp
+++ b/src/pieces/methods/coscia_class.cpp
@@ -13,7 +13,7 @@ Coscia::~Coscia(){
     delete shapeYZ;
 }
 
-void Coscia::update(sf::Clock cl){
+void Coscia::update(sf::Clock cl, float multiplier){
     //body.step(cl);
 }
 
diff --git a/src/pieces/methods/sensore_class.cpp b/src/pieces/methods/sensore_class.cpp
index af6f6f4..505bc0e 100644
--- a/src/pieces/methods/sensore_class.cpp
+++ b/src/pieces/methods/sensore_class.cpp
@@ -49,7 +49,7 @@ void Sensore::initCSV(std::vector<std::vector<float>> data){
 }
 
 
-void Sensore::update(sf::Clock cl){
+void Sensore::update(sf::Clock cl, float multiplier){
    
     //calcolo la posizione e velocità
     if (*dataPos >= gData.size()) *dataPos = gData.size()-1;
@@ -58,7 +58,7 @@ void Sensore::update(sf::Clock cl){
 
 
     body.setAcc(rb::Vector3{accData[*dataPos]});
-    body.step(cl);
+    body.step(cl, multiplier);
    
 }
 
diff --git a/src/pieces/methods/torso.cpp b/src/pieces/methods/torso.cpp
index a48c7f7..fa15fa8 100644
--- a/src/pieces/methods/torso.cpp
+++ b/src/pieces/methods/torso.cpp
@@ -14,7 +14,7 @@ Torso::~Torso(){
     delete shapeYZ;
 }
 
-void Torso::update(sf::Clock cl){
+void Torso::update(sf::Clock cl,float multiplier){
     
 }
 
diff --git a/src/rigidbody/headers/rb.hpp b/src/rigidbody/headers/rb.hpp
index 7db6e5e..e0345bd 100644
--- a/src/rigidbody/headers/rb.hpp
+++ b/src/rigidbody/headers/rb.hpp
@@ -49,7 +49,7 @@
                 void setVel(const Vector3 Nacc);
                 void setAcc(const Vector3 Nvel);
                 void setTanAcc(const Vector3 Dacc);
-                void step(const sf::Clock time);
+                void step(const sf::Clock time, float multiplier);
 
                 //complesso, deve definire accelerazione e accelerazione tangenziale 
                 void appForce(Vector3 f, Vector3 pos);
diff --git a/src/rigidbody/methods/rb_class.cpp b/src/rigidbody/methods/rb_class.cpp
index 96ddffe..c0ed1bc 100755
--- a/src/rigidbody/methods/rb_class.cpp
+++ b/src/rigidbody/methods/rb_class.cpp
@@ -85,12 +85,12 @@ void rigidbody::calcPos(const float Dtime){
     }
 }
 
-void rigidbody::step(const sf::Clock time){
+void rigidbody::step(const sf::Clock time, float multiplier){
     int64_t Dtime = time.getElapsedTime().asMicroseconds();
     if (prevT == 0) prevT = Dtime;
 
 
-    float dt = (float(Dtime) / 1000000.0) - (float(prevT) / 1000000.0);
+    float dt = ((float(Dtime) / 1000000.0) - (float(prevT) / 1000000.0)) * multiplier;
     prevT = Dtime;
 
     calcRot(dt);
diff --git a/src/sfml_util.cpp b/src/sfml_util.cpp
index e066d97..a800a72 100644
--- a/src/sfml_util.cpp
+++ b/src/sfml_util.cpp
@@ -29,11 +29,11 @@ struct State
     sf::Vector2f cameraOffset = {0.,0.};
 
     sf::Clock clock;
+    float* tMul; 
     sf::Clock PieceClock;
     ReferencePlane selectedPlane = ReferencePlane::XZ;
 
     PieceInterface* selected = nullptr;
-
     bool rot_Piece = false;
     bool drag_Piece = false;
     bool drag = false;
@@ -51,6 +51,7 @@ struct State
         window = sf::RenderWindow(sf::VideoMode({w, h}), title);
         if (ImGui::SFML::Init(window)); // L'if è solo per togliere il warning, va aggiustato gestendo le eccezioni
         clock.restart();
+        tMul = new float(1.0);
         PieceClock.restart();
         intervalMajLimit = maj;
         intervalMinLimit = min;
@@ -68,6 +69,9 @@ struct State
             createdColl.push_back(c->create(selectedPlane));
         }
     }
+    ~State(){
+        delete tMul;
+    }
 };
 
 ///
@@ -84,14 +88,14 @@ void State::update(){
     */
     if (play){
         for (auto i : collections){
-            i->update(PieceClock);
+            i->update(PieceClock, *tMul);
         }
     }
 
     for (auto i : createdColl){
         if (play){
             for (auto j : i.pieces){
-                j->update(PieceClock);
+                j->update(PieceClock, *tMul);
             }
         }
         for (auto j : i.joints){
@@ -101,7 +105,7 @@ void State::update(){
 
     if (play){
         for(PieceInterface* p : pieces){
-            p->update(PieceClock);
+            p->update(PieceClock, *tMul);
         }
     }
     for(JointInterface* j : joints){
@@ -333,9 +337,15 @@ void doGUI(State &gs)
     } 
 
 
-    /*//////   DA FARE  ///////*/
-
+   
     //Finestra gestione velocità di riproduzione 
+    ImGui::Begin("Set time multiplier", 0,sdp_flags);
+    const float TimeMul[] = {0.5, 0.75, 1, 1.25, 1.5};
+    const char* TimeMulChar[] = {"0.5", "0.75", "1", "1.25", "1.5"};
+    int id = 2;
+    ImGui::SliderInt("Selected Plane", &id,0,4,TimeMulChar[id]);
+    gs.tMul* = TimeMul[id]; 
+    ImGui::End();
 
     //Finestra controllo sovrapposizione