From 0ccc89210267683cb523a11426e734bad31f69f3 Mon Sep 17 00:00:00 2001
From: Eduardo <yo@edufdez.es>
Date: Thu, 9 May 2024 16:18:11 +0200
Subject: [PATCH] player health and damage by enemies

---
 components/base_enemy/base_enemy.gd |  8 ++++++++
 components/player/Player.tscn       | 11 +++++++++++
 components/player/player.gd         | 21 +++++++++++++++++++++
 project.godot                       |  1 +
 scenes/base_level/base_level.gd     | 11 -----------
 5 files changed, 41 insertions(+), 11 deletions(-)

diff --git a/components/base_enemy/base_enemy.gd b/components/base_enemy/base_enemy.gd
index b39fa54..38f60da 100644
--- a/components/base_enemy/base_enemy.gd
+++ b/components/base_enemy/base_enemy.gd
@@ -10,6 +10,7 @@ signal enemy_died
 func _physics_process(_delta):
 	velocity = position.direction_to(player.position) * SPEED
 	move_and_slide()
+	detect_collision()
 
 
 func take_damage(amount: float):
@@ -22,3 +23,10 @@ func die():
 	# TODO: animation to die
 	emit_signal("enemy_died")
 	queue_free()
+
+func detect_collision():
+	var collision = get_last_slide_collision()
+	if collision:
+		var collider = collision.get_collider()
+		if collider.name.to_lower().contains("player"):
+			collider.take_damage(1)
diff --git a/components/player/Player.tscn b/components/player/Player.tscn
index d82a0b5..81becf4 100644
--- a/components/player/Player.tscn
+++ b/components/player/Player.tscn
@@ -5,6 +5,7 @@
 [sub_resource type="CircleShape2D" id="CircleShape2D_oxutk"]
 
 [node name="Player" type="CharacterBody2D"]
+collision_mask = 3
 motion_mode = 1
 script = ExtResource("1_twtc0")
 
@@ -15,3 +16,13 @@ polygon = PackedVector2Array(-0.267257, -4.94762, -0.367478, 0, -0.267257, 4.947
 
 [node name="CollisionShape2D" type="CollisionShape2D" parent="."]
 shape = SubResource("CircleShape2D_oxutk")
+
+[node name="LabelHealth" type="Label" parent="."]
+offset_top = -23.0
+offset_right = 21.0
+text = "10"
+horizontal_alignment = 1
+
+[node name="InvulTimer" type="Timer" parent="."]
+wait_time = 0.8
+one_shot = true
diff --git a/components/player/player.gd b/components/player/player.gd
index 34443ef..d2ec620 100644
--- a/components/player/player.gd
+++ b/components/player/player.gd
@@ -2,9 +2,16 @@ extends CharacterBody2D
 
 
 const SPEED = 300.0
+const MAX_HEALTH = 10
+var health = 10
 var fire_timer: Timer
 var nearest_enemy: Node2D
 @export var Enemies: Node
+@onready var label_health: Label = $LabelHealth
+@onready var invul_timer: Timer = $InvulTimer
+
+signal player_dead
+
 
 func _init():
 	fire_timer = Timer.new()
@@ -15,6 +22,10 @@ func _init():
 	add_child(fire_timer)
 
 
+func _ready():
+	label_health.text = str(MAX_HEALTH)
+
+
 func _process(delta):
 	var nearest_node: Node2D
 
@@ -57,3 +68,13 @@ func on_fire_timer_timeout():
 		bullet_instance.set_target(nearest_enemy)
 
 
+func take_damage(amount: int):
+	if invul_timer.is_stopped():
+		invul_timer.start()
+		
+		health -= amount
+		label_health.text = str(health)
+		
+		if health <= 0:
+			get_tree().paused = true
+			emit_signal("player_dead")
diff --git a/project.godot b/project.godot
index 88b84ad..658a9dc 100644
--- a/project.godot
+++ b/project.godot
@@ -88,6 +88,7 @@ ui_down={
 
 [layer_names]
 
+2d_physics/layer_1="Player"
 2d_physics/layer_2="Enemy Layer"
 2d_physics/layer_3="Bullets"
 2d_physics/layer_10="KillZone"
diff --git a/scenes/base_level/base_level.gd b/scenes/base_level/base_level.gd
index fd2bbee..7ba9215 100644
--- a/scenes/base_level/base_level.gd
+++ b/scenes/base_level/base_level.gd
@@ -1,16 +1,5 @@
 extends Node2D
 
-
-# Called when the node enters the scene tree for the first time.
-func _ready():
-	pass # Replace with function body.
-
-
-# Called every frame. 'delta' is the elapsed time since the previous frame.
-func _process(delta):
-	pass
-
-
 # to remove stray bullets mainly
 func _on_kill_zone_area_entered(area: Area2D):
 	area.queue_free()
-- 
2.30.2