Implementing Zooming

client/src/main/java/core/engine/Engine.java

@@ -9,9 +9,7 @@ import core.engine.renderer.MasterRenderer;
 import core.engine.terrain.Terrain;
 import core.engine.textures.ModelTexture;
 import org.lwjgl.Version;
-import org.lwjgl.glfw.GLFWErrorCallback;
+import org.lwjgl.glfw.*;
-import org.lwjgl.glfw.GLFWKeyCallback;
-import org.lwjgl.glfw.GLFWVidMode;
 import org.lwjgl.opengl.GL;
 import org.lwjgl.system.MemoryStack;
 import utils.vectors.Vector3f;
@@ -113,6 +111,19 @@ public class Engine {
         // Set the clear color
         glClearColor(1.0f, 0.0f, 0.0f, 0.0f);
         Camera camera = new Camera();
+
+        GLFWScrollCallback glfwScrollCallback = new GLFWScrollCallback() {
+            @Override
+            public void invoke(long window, double xOffset, double yOffset) {
+                if(yOffset > 0) {
+                    camera.zoomIn();
+                } else if(yOffset < 0) {
+                    camera.zoomOut();
+                }
+            }
+        };
+
+        glfwSetScrollCallback(window, glfwScrollCallback);
         glfwSetKeyCallback(window, glfwKeyCallback = new GLFWKeyCallback() {
             @Override
             public void invoke(long window, int key, int scancode, int action, int mods) {

client/src/main/java/core/engine/entity/Camera.java

@@ -25,6 +25,14 @@ public class Camera {
         position.x -= .5f;
     }
 
+    public void zoomOut() {
+        position.y += 0.5f;
+    }
+
+    public void zoomIn() {
+        position.y -= 0.5f;
+    }
+
     public Vector3f getPosition() {
         return position;
     }