How can I implement a feature to zoom in using the mouse wheel in Godot?

Implementing Mouse Wheel Zoom in Godot

Setting Up the Scene

To implement mouse wheel zoom functionality in a Godot 3D scene, you must first ensure your project is set up correctly. This involves having a Camera node that allows manipulation through user input and a 3D scene that requires zoom capabilities.

Code Implementation

extends Camera

var zoom_speed = 0.1
var min_distance = 1.0
var max_distance = 20.0

func _process(delta):
    if Input.is_action_just_pressed('ui_zoom_in'):
        zoom_in()
    elif Input.is_action_just_pressed('ui_zoom_out'):
        zoom_out()

func zoom_in():
    if translation.z - zoom_speed > min_distance:
        translation.z -= zoom_speed

func zoom_out():
    if translation.z + zoom_speed < max_distance:
        translation.z += zoom_speed

This script allows you to zoom in and out by manipulating the camera’s translation.z value, effectively moving it closer or further from the target.

Your gaming moment has arrived!

Integrating Mouse Events

Bind mouse wheel actions within Godot’s Input System. Open Project Settings, navigate to Input Map, and add actions named ui_zoom_in and ui_zoom_out. Assign them the mouse wheel up and down actions, respectively.

Fine-Tuning and Testing

• Adjust Speeds: Tweak zoom_speed, min_distance, and max_distance to suit your gameplay requirements.
• Test Regularly: Use Godot’s play mode to iterate and test the zoom performance dynamically.