diff --git a/main.c b/main.c
index 2be426d..44104eb 100644
--- a/main.c
+++ b/main.c
@@ -8,15 +8,17 @@
 #include "./Libraries/stb/stb_image.h"
 #include "headers/shader.h"
 #define FULLSCREEN 0
+#define EXPERIMENTAL_FEATURES 1
 /* ## DEBUG MODE ##
  * 0 for all
  * 1 for nothing
  * 2 for FPS
  * 3 for cursor position
+ * 5 for scroll level and precision
  * 
  * For instance if you want fps and position set the value to 2*3=6
  */
-#define DEBUG_MODE 3
+#define DEBUG_MODE 5
 
 GLuint screenWidth = 720, screenHeight = 480;
 const GLFWvidmode* mode;
@@ -29,11 +31,12 @@ void setupVAO();
 unsigned int VAO;
 
 float currentTime, deltaTime, lastFrame,startTime;
-float mousePosX,mousePosY,camPosX,camPosY,camPosZ,camDirX,camDirY,camDirZ;
+float mousePosX,mousePosY,camPosX,camPosY,camPosZ;
+float fovValue=1.0;
 //283=3.14/2 * 180
 const int maxYmouse = 283;
 // more precision means less speed
-const int camPrecision = 2;
+float camPrecision = 2.;
 
 static void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
 {
@@ -59,6 +62,27 @@ static void key_callback(GLFWwindow* window, int key, int scancode, int action,
     glfwSetWindowShouldClose(window, GLFW_TRUE);
 }
 
+void scroll_callback(GLFWwindow* window, double xoffset, double yoffset)
+{
+  int stateControl = glfwGetKey(window, GLFW_KEY_LEFT_CONTROL);
+  
+  // we only use yoffset as it is present on normal mice
+  if (DEBUG_MODE % 5 == 0)
+    printf("scroll value : %f | precision : %f | ",yoffset, camPrecision);
+    printf((stateControl == GLFW_PRESS) ? "ctrl -> speed" : "Zooming");
+    printf("\n");
+  if (stateControl == GLFW_PRESS) {
+    camPrecision += yoffset/2;
+    if (camPrecision <= 1)
+      camPrecision=1;
+  }
+  else {
+    fovValue += yoffset/5;
+    if (fovValue <= 0.2 && EXPERIMENTAL_FEATURES == 0)
+      fovValue=0.2;
+  }
+  
+}
 
 static void cursor_position_callback(GLFWwindow* window, double xpos, double ypos)
 {
@@ -136,6 +160,7 @@ int main (){
   glfwSetKeyCallback(window, key_callback);
  	glfwSetCursorPosCallback(window, cursor_position_callback);
   glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
+  glfwSetScrollCallback(window, scroll_callback);
 
   GLFWimage images[1]; 
   images[0].pixels = stbi_load("./assets/icon.png", &images[0].width, &images[0].height, 0, 4); //rgba channels 
@@ -177,8 +202,7 @@ int main (){
     glUniform1f(glGetUniformLocation(quad_shader, "iTime"), currentTime-startTime);
 		glUniform2f(glGetUniformLocation(quad_shader, "iMousePos"), mousePosX,mousePosY);
 		glUniform3f(glGetUniformLocation(quad_shader, "iCamPos"), camPosX,camPosY,camPosZ);
-		glUniform3f(glGetUniformLocation(quad_shader, "iCamDir"), camDirX,camDirY,camDirZ);
-				
+		glUniform1f(glGetUniformLocation(quad_shader, "iFovValue"), fovValue);
     // glBindVertexArray(0); // no need to unbind it every time 
   }
 
diff --git a/shaders/generic.vs b/shaders/generic.vs
index 29d8fd5..7c166c3 100644
--- a/shaders/generic.vs
+++ b/shaders/generic.vs
@@ -7,12 +7,12 @@ out vec2 FragCoord;
 out float Time;
 out vec2 MousePos;
 out vec3 CamPos;
-out vec3 CamDir;
+out float fovValue;
 
 uniform float iTime;
 uniform vec2 iMousePos;
 uniform vec3 iCamPos;
-uniform vec3 iCamDir;
+uniform float iFovValue;
 
 
 void main()
@@ -22,5 +22,5 @@ void main()
    Time=iTime;
    MousePos = iMousePos;
    CamPos = iCamPos;
-   CamDir = iCamDir;
+   fovValue = iFovValue;
 }
diff --git a/shaders/quad.fs b/shaders/quad.fs
index e42cf75..239a596 100644
--- a/shaders/quad.fs
+++ b/shaders/quad.fs
@@ -4,7 +4,7 @@ in vec2 FragCoord;
 in float Time;
 in vec2 MousePos;
 in vec3 CamPos;
-in vec3 CamDir;
+in float fovValue;
 
 out vec4 FragColor;
 //uniform sampler2D generalTexture;
@@ -101,7 +101,7 @@ void main(){
 	vec3 ex = normalize(cross(ez,vec3(0.,1.,0.)));
 	vec3 ey = cross(ex,ez);
 	
-	vec3 dir = normalize(FragCoord.x * ex + FragCoord.y*ey + 1.*ez);
+	vec3 dir = normalize(FragCoord.x * ex + FragCoord.y*ey + fovValue*ez);
 	
 	
   //float c=Mandel(FragCoord*1.5);