add mouse wheel camera rotation

game/camera.go

@@ -10,6 +10,7 @@ var (
 	cameraDistance = float32(20.0)
 	cameraYaw      = float32(145.0)
 	cameraPitch    = float32(45.0)
+	lastMousePos   rl.Vector2 // Add this to track mouse movement
 )
 
 func UpdateCamera(camera *rl.Camera3D, player rl.Vector3, deltaTime float32) {
@@ -32,6 +33,34 @@ func UpdateCamera(camera *rl.Camera3D, player rl.Vector3, deltaTime float32) {
 		}
 	}
 
+	// Handle middle mouse camera rotation
+	if rl.IsMouseButtonDown(rl.MouseMiddleButton) {
+		currentMousePos := rl.GetMousePosition()
+
+		// If we just started holding the button, initialize last position
+		if !rl.IsMouseButtonPressed(rl.MouseMiddleButton) {
+			mouseDelta := rl.Vector2{
+				X: currentMousePos.X - lastMousePos.X,
+				Y: currentMousePos.Y - lastMousePos.Y,
+			}
+
+			// Adjust rotation speed as needed
+			cameraYaw += mouseDelta.X * 0.5 * deltaTime * 60
+			cameraPitch += mouseDelta.Y * 0.5 * deltaTime * 60
+
+			// Clamp pitch to prevent camera flipping
+			if cameraPitch < 20 {
+				cameraPitch = 20
+			}
+			if cameraPitch > 85 {
+				cameraPitch = 85
+			}
+		}
+
+		lastMousePos = currentMousePos
+	}
+
+	// Keep the keyboard controls too
 	if rl.IsKeyDown(rl.KeyRight) {
 		cameraYaw += 100 * deltaTime
 	}