From 7a90d8134fefc12216d7a0ca9856353d78cda8a3 Mon Sep 17 00:00:00 2001
From: nknguyenhc <87511888+nknguyenhc@users.noreply.github.com>
Date: Wed, 17 Jan 2024 19:26:17 +0800
Subject: [PATCH] Add enemy pathfinding

---
 src/enemy/enemy.gd   | 24 ++++++++++++++++++++++++
 src/enemy/enemy.tscn | 17 ++++++++++++++---
 src/map/map.tscn     |  9 ++++++++-
 3 files changed, 46 insertions(+), 4 deletions(-)
 create mode 100644 src/enemy/enemy.gd

diff --git a/src/enemy/enemy.gd b/src/enemy/enemy.gd
new file mode 100644
index 0000000..ff041bc
--- /dev/null
+++ b/src/enemy/enemy.gd
@@ -0,0 +1,24 @@
+extends CharacterBody2D
+
+const SPEED = 100
+
+@onready var player: CharacterBody2D = get_parent().get_node("Player")
+@onready var navigator: NavigationAgent2D = $NavigationAgent2D
+
+
+func _ready():
+	find_path()
+
+
+func _physics_process(delta):
+	var direction = to_local(navigator.get_next_path_position()).normalized()
+	velocity = direction * SPEED
+	move_and_slide()
+
+
+func find_path():
+	navigator.target_position = player.position
+
+
+func _on_navigation_timer_timeout():
+	find_path()
diff --git a/src/enemy/enemy.tscn b/src/enemy/enemy.tscn
index c0be5a5..441d284 100644
--- a/src/enemy/enemy.tscn
+++ b/src/enemy/enemy.tscn
@@ -1,18 +1,29 @@
-[gd_scene load_steps=3 format=3 uid="uid://d1t70mghq4jqo"]
+[gd_scene load_steps=4 format=3 uid="uid://d1t70mghq4jqo"]
 
 [ext_resource type="Texture2D" uid="uid://b6iglbqclfol6" path="res://icon.svg" id="1_1qbt2"]
+[ext_resource type="Script" path="res://enemy/enemy.gd" id="1_axdwg"]
 
-[sub_resource type="RectangleShape2D" id="RectangleShape2D_qol47"]
+[sub_resource type="CircleShape2D" id="CircleShape2D_gftau"]
 
 [node name="Enemy" type="CharacterBody2D"]
 collision_layer = 4
 collision_mask = 3
 motion_mode = 1
 wall_min_slide_angle = 0.0
+script = ExtResource("1_axdwg")
 
 [node name="CollisionShape2D" type="CollisionShape2D" parent="."]
-shape = SubResource("RectangleShape2D_qol47")
+shape = SubResource("CircleShape2D_gftau")
 
 [node name="Sprite2D" type="Sprite2D" parent="."]
 scale = Vector2(0.15625, 0.15625)
 texture = ExtResource("1_1qbt2")
+
+[node name="NavigationAgent2D" type="NavigationAgent2D" parent="."]
+debug_enabled = true
+
+[node name="NavigationTimer" type="Timer" parent="."]
+wait_time = 0.1
+autostart = true
+
+[connection signal="timeout" from="NavigationTimer" to="." method="_on_navigation_timer_timeout"]
diff --git a/src/map/map.tscn b/src/map/map.tscn
index dfd2947..f62776d 100644
--- a/src/map/map.tscn
+++ b/src/map/map.tscn
@@ -1,9 +1,14 @@
-[gd_scene load_steps=8 format=3 uid="uid://y4brqgeqv22u"]
+[gd_scene load_steps=9 format=3 uid="uid://y4brqgeqv22u"]
 
 [ext_resource type="Texture2D" uid="uid://0p8c7ft70lv5" path="res://assets/SproutLands/Tilesets/Grass.png" id="1_53lk6"]
 [ext_resource type="Texture2D" uid="uid://c5c0gkp3n78xa" path="res://assets/SproutLands/Tilesets/Hills.png" id="2_c7h1q"]
 [ext_resource type="Texture2D" uid="uid://b8pa0fb7oeqby" path="res://assets/SproutLands/Objects/Basic_Grass_Biom_things.png" id="3_cdhlv"]
 
+[sub_resource type="NavigationPolygon" id="NavigationPolygon_wpv7e"]
+vertices = PackedVector2Array(-8, -8, 8, -8, 8, 8, -8, 8)
+polygons = Array[PackedInt32Array]([PackedInt32Array(0, 1, 2, 3)])
+outlines = Array[PackedVector2Array]([PackedVector2Array(-8, -8, 8, -8, 8, 8, -8, 8)])
+
 [sub_resource type="TileSetAtlasSource" id="TileSetAtlasSource_8q6ug"]
 texture = ExtResource("1_53lk6")
 0:0/0 = 0
@@ -174,6 +179,7 @@ texture = ExtResource("1_53lk6")
 3:5/0 = 0
 3:5/0/physics_layer_0/linear_velocity = Vector2(0, 0)
 3:5/0/physics_layer_0/angular_velocity = 0.0
+3:5/0/navigation_layer_0/polygon = SubResource("NavigationPolygon_wpv7e")
 4:5/0 = 0
 4:5/0/physics_layer_0/linear_velocity = Vector2(0, 0)
 4:5/0/physics_layer_0/angular_velocity = 0.0
@@ -610,6 +616,7 @@ texture = ExtResource("3_cdhlv")
 [sub_resource type="TileSet" id="TileSet_fggcw"]
 physics_layer_0/collision_layer = 2
 physics_layer_0/collision_mask = 0
+navigation_layer_0/layers = 1
 sources/0 = SubResource("TileSetAtlasSource_8q6ug")
 sources/1 = SubResource("TileSetAtlasSource_ucsp2")
 sources/2 = SubResource("TileSetAtlasSource_0iofd")