feat: implement camera zoom functionality and adjust camera position in scene

Author: himanusia

src/main_scene/main_scene.cpp

@@ -59,6 +59,8 @@ void MainScene::_notification(int p_what) {
                 }
             }
 
+            camera_node = get_node<Camera3D>("Camera3D");
+            
             ResourceLoader* rl = ResourceLoader::get_singleton();
             car2_template = rl->load("res://scenes/car2.tscn");
             car3_template = rl->load("res://scenes/car3.tscn");
@@ -70,6 +72,32 @@ void MainScene::_notification(int p_what) {
     }
 }
 
+void MainScene::_input(const Ref<InputEvent>& event) {
+    if (!camera_node) {
+        return;
+    }
+
+    Ref<InputEventMouseButton> mb_event = event;
+    if (mb_event.is_valid()) {
+        if (mb_event->is_pressed()) {
+            Vector3 current_position = camera_node->get_global_position();
+            float current_distance_from_origin = current_position.length();
+
+            if (mb_event->get_button_index() == MouseButton::MOUSE_BUTTON_WHEEL_UP) {
+                if (current_distance_from_origin > min_zoom_distance) {
+                    camera_node->translate_object_local(Vector3(0, 0, -zoom_speed));
+                }
+                // UtilityFunctions::print("Zoom In");
+            } else if (mb_event->get_button_index() == MouseButton::MOUSE_BUTTON_WHEEL_DOWN) {
+                if (current_distance_from_origin < max_zoom_distance) {
+                    camera_node->translate_object_local(Vector3(0, 0, zoom_speed));
+                }
+                // UtilityFunctions::print("Zoom Out");
+            }
+        }
+    }
+}
+
 void MainScene::_process(double delta) {
     if (is_searching) {
         // time->set_text("Time: " + String::num(get_process_time()));

src/main_scene/main_scene.hpp

@@ -1,6 +1,8 @@
 #pragma once
 
 #include <godot_cpp/classes/node3d.hpp>
+#include <godot_cpp/classes/camera3d.hpp>
+#include <godot_cpp/classes/input_event_mouse_button.hpp>
 #include <godot_cpp/classes/button.hpp>
 #include <godot_cpp/classes/option_button.hpp>
 #include <godot_cpp/classes/label.hpp>
@@ -64,6 +66,11 @@ class MainScene : public Node3D {
     bool is_animating_solution = false;
     const float ANIMATION_DURATION = 0.5f;
 
+    Camera3D* camera_node;
+    float zoom_speed = 0.5f;
+    float min_zoom_distance = 2.0f;
+    float max_zoom_distance = 20.0f;
+
     void _animate_next_move();
     void _on_move_animation_finished();
     Vector3 _get_3d_position_for_piece_coords(const Coordinates& piece_top_left_coords, int piece_size, bool is_vertical_piece);
@@ -91,4 +98,5 @@ class MainScene : public Node3D {
     ~MainScene();
 
     void _process(double delta) override;
+    void _input(const Ref<InputEvent>& event);
 };

tukang-parkir-simulator/scenes/main.tscn

@@ -64,7 +64,7 @@ transform = Transform3D(-4.37114e-08, 0, 1, 0, 1, 0, -1, 0, -4.37114e-08, -0.5,
 shape = SubResource("ConcavePolygonShape3D_0wfyh")
 
 [node name="Camera3D" type="Camera3D" parent="."]
-transform = Transform3D(1, 0, 0, 0, 0.5, 0.866025, 0, -0.866025, 0.5, 0, 8, 7)
+transform = Transform3D(1, 0, 0, 0, 0.5, 0.866025, 0, -0.866025, 0.5, 0, 7, 5)
 current = true
 
 [node name="UI" type="CanvasLayer" parent="."]