simple dynamic crosshair

commit 4fd60e7874
Author: Morph01 <145839520+Morph01@users.noreply.github.com>
Date:   Fri Aug 16 14:19:29 2024 +0200

    bug animation ???

godot/Scenes/Characters/first_person_player.tscn

@@ -24,3 +24,42 @@ transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.1, 0)
 
 [node name="Steampunk Rifle" parent="Head/Camera" instance=ExtResource("1_i6keg")]
 transform = Transform3D(1, 0, 0, 0, 0.998135, -0.0610485, 0, 0.0610485, 0.998135, 0.19, -0.18, -0.55)
+
+[node name="UserInterface" type="Control" parent="."]
+layout_mode = 3
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+mouse_filter = 1
+
+[node name="Crosshair" type="Crosshair" parent="UserInterface"]
+layout_mode = 1
+anchors_preset = 8
+anchor_left = 0.5
+anchor_top = 0.5
+anchor_right = 0.5
+anchor_bottom = 0.5
+offset_left = -20.0
+offset_top = -20.0
+offset_right = 20.0
+offset_bottom = 20.0
+grow_horizontal = 2
+grow_vertical = 2
+
+[node name="Top" type="Line2D" parent="UserInterface/Crosshair"]
+points = PackedVector2Array(0, -5, 0, -15)
+width = 2.0
+
+[node name="Right" type="Line2D" parent="UserInterface/Crosshair"]
+points = PackedVector2Array(5, 0, 15, 0)
+width = 2.0
+
+[node name="Bottom" type="Line2D" parent="UserInterface/Crosshair"]
+points = PackedVector2Array(0, 5, 0, 15)
+width = 2.0
+
+[node name="Left" type="Line2D" parent="UserInterface/Crosshair"]
+points = PackedVector2Array(-5, 0, -15, 0)
+width = 2.0

godot/Scenes/Characters/player.tscn

@@ -3771,6 +3771,6 @@ callback_mode_process = 0
 tree_root = SubResource("AnimationNodeBlendTree_dptuf")
 anim_player = NodePath("../AnimationPlayer")
 parameters/ground_air_transition/current_state = "air"
-parameters/ground_air_transition/transition_request = ""
+parameters/ground_air_transition/transition_request = "air"
 parameters/ground_air_transition/current_index = 1
 parameters/iwr_blend/blend_amount = -1.0

godot/Scenes/Levels/world.tscn

@@ -1,10 +1,9 @@
-[gd_scene load_steps=20 format=3 uid="uid://coue2qehpn4fr"]
+[gd_scene load_steps=19 format=3 uid="uid://coue2qehpn4fr"]
 
 [ext_resource type="Texture2D" uid="uid://dujfl12rge3p4" path="res://Assets/Textures/Sky.png" id="1_mnexj"]
 [ext_resource type="Texture2D" uid="uid://b8n5rff2a8h2u" path="res://Assets/Textures/Black.png" id="2_fkwcn"]
 [ext_resource type="Texture2D" uid="uid://lpbttkw7gpxj" path="res://Assets/Textures/Orange.png" id="3_ux02w"]
 [ext_resource type="Texture2D" uid="uid://di3uyny341483" path="res://Assets/Textures/Green.png" id="4_wp15n"]
-[ext_resource type="PackedScene" uid="uid://bcawyy7lmwphr" path="res://Scenes/Characters/zombie.tscn" id="5_4vmh3"]
 [ext_resource type="PackedScene" uid="uid://d38w4ae3qj0k4" path="res://Scenes/Characters/first_person_player.tscn" id="5_8ctht"]
 
 [sub_resource type="PanoramaSkyMaterial" id="PanoramaSkyMaterial_6c4vd"]
@@ -58,7 +57,7 @@ uv1_triplanar = true
 [sub_resource type="ConcavePolygonShape3D" id="ConcavePolygonShape3D_rit6o"]
 data = PackedVector3Array(-12.5, 2.5, 2.5, 2.5, -2.5, 2.5, -2.5, -2.5, 2.5, -12.5, 2.5, -2.5, -2.5, -2.5, -2.5, 2.5, -2.5, -2.5, -12.5, 2.5, 2.5, -12.5, 2.5, -2.5, 2.5, -2.5, 2.5, -12.5, 2.5, -2.5, 2.5, -2.5, -2.5, 2.5, -2.5, 2.5, -12.5, 2.5, -2.5, -12.5, 2.5, 2.5, -2.5, -2.5, -2.5, -12.5, 2.5, 2.5, -2.5, -2.5, 2.5, -2.5, -2.5, -2.5, -2.5, -2.5, 2.5, 2.5, -2.5, 2.5, -2.5, -2.5, -2.5, 2.5, -2.5, 2.5, 2.5, -2.5, -2.5, -2.5, -2.5, -2.5)
 
-[node name="World" type="Node3D"]
+[node name="World" type="World"]
 
 [node name="Map" type="Node3D" parent="."]
 
@@ -77,6 +76,8 @@ mesh = SubResource("PlaneMesh_mmup0")
 skeleton = NodePath("../../..")
 
 [node name="StaticBody3D" type="StaticBody3D" parent="Map/NavigationRegion3D/Floor"]
+collision_layer = 3
+collision_mask = 3
 
 [node name="CollisionShape3D" type="CollisionShape3D" parent="Map/NavigationRegion3D/Floor/StaticBody3D"]
 shape = SubResource("ConcavePolygonShape3D_26ptr")
@@ -87,6 +88,8 @@ mesh = SubResource("BoxMesh_plpqy")
 skeleton = NodePath("../../..")
 
 [node name="StaticBody3D" type="StaticBody3D" parent="Map/NavigationRegion3D/Wall"]
+collision_layer = 3
+collision_mask = 3
 
 [node name="CollisionShape3D" type="CollisionShape3D" parent="Map/NavigationRegion3D/Wall/StaticBody3D"]
 shape = SubResource("ConcavePolygonShape3D_v7prx")
@@ -98,12 +101,55 @@ skeleton = NodePath("../../..")
 surface_material_override/0 = SubResource("StandardMaterial3D_pfpgv")
 
 [node name="StaticBody3D" type="StaticBody3D" parent="Map/NavigationRegion3D/Slope"]
+collision_layer = 3
+collision_mask = 3
 
 [node name="CollisionShape3D" type="CollisionShape3D" parent="Map/NavigationRegion3D/Slope/StaticBody3D"]
 shape = SubResource("ConcavePolygonShape3D_rit6o")
 
-[node name="zombie" parent="Map" instance=ExtResource("5_4vmh3")]
-m_PlayerPath = NodePath("../../FirstPersonPlayer")
-transform = Transform3D(-0.98774, 0, -0.156107, 0, 1, 0, 0.156107, 0, -0.98774, 0, 0, 7.38477)
+[node name="Spawns" type="Node3D" parent="Map"]
+
+[node name="Spawn1" type="Node3D" parent="Map/Spawns"]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 18.6089)
+
+[node name="Spawn2" type="Node3D" parent="Map/Spawns"]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 18.8451, 0, 18.6089)
+
+[node name="Spawn3" type="Node3D" parent="Map/Spawns"]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 18.8451, 0, 0.0245247)
+
+[node name="Spawn4" type="Node3D" parent="Map/Spawns"]
+transform = Transform3D(-0.269021, -0.963134, 0, 0.963134, -0.269021, 0, 0, 0, 1, 19.0777, 0, -20.2546)
+
+[node name="Spawn5" type="Node3D" parent="Map/Spawns"]
+transform = Transform3D(-0.269021, -0.963134, 0, 0.963134, -0.269021, 0, 0, 0, 1, 1.64303, 0, -20.2546)
+
+[node name="Spawn6" type="Node3D" parent="Map/Spawns"]
+transform = Transform3D(-0.269021, -0.963134, 0, 0.963134, -0.269021, 0, 0, 0, 1, -19.0255, 0, -20.2546)
+
+[node name="Spawn7" type="Node3D" parent="Map/Spawns"]
+transform = Transform3D(-0.269021, -0.963134, 0, 0.963134, -0.269021, 0, 0, 0, 1, -19.0255, 0, 0.256641)
+
+[node name="Spawn8" type="Node3D" parent="Map/Spawns"]
+transform = Transform3D(-0.269021, -0.963134, 0, 0.963134, -0.269021, 0, 0, 0, 1, -19.0255, 0, 16.4132)
 
 [node name="FirstPersonPlayer" parent="." instance=ExtResource("5_8ctht")]
+
+[node name="UI" type="Control" parent="."]
+layout_mode = 3
+anchors_preset = 0
+offset_right = 40.0
+offset_bottom = 40.0
+
+[node name="HitRect" type="ColorRect" parent="UI"]
+visible = false
+layout_mode = 0
+offset_left = -177.0
+offset_top = -96.0
+offset_right = 1365.0
+offset_bottom = 780.0
+color = Color(1, 0, 0, 0.34902)
+
+[node name="ZombieSpawnTimer" type="Timer" parent="."]
+wait_time = 5.0
+autostart = true

godot/Scenes/Weapons/bullet.tscn

@@ -25,14 +25,17 @@ material = SubResource("StandardMaterial3D_gn2fy")
 size = Vector3(0.04, 0.04, 0.04)
 
 [node name="Bullet" type="Bullet"]
-transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, -52730.2)
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, -56304.6)
 
 [node name="MeshInstance3D" type="MeshInstance3D" parent="."]
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, -0.6)
 mesh = SubResource("BoxMesh_ibwn0")
 surface_material_override/0 = SubResource("StandardMaterial3D_2qdhl")
 
 [node name="RayCast3D" type="RayCast3D" parent="."]
 target_position = Vector3(0, 0, -0.6)
+collision_mask = 2
+collide_with_areas = true
 
 [node name="GPUParticles3D" type="GPUParticles3D" parent="."]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, -0.7)

godot/Scenes/Weapons/steampunk_rifle.tscn

@@ -32,5 +32,5 @@ libraries = {
 }
 
 [node name="RayCast3D" type="RayCast3D" parent="." index="2"]
-transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, -1.10108)
+transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, -0.6)
 target_position = Vector3(0, 0, -1)

src/BoneCollisionShape.cpp

@@ -0,0 +1,60 @@
+#include "BoneCollisionShape.h"
+
+using namespace godot;
+
+namespace blitz {
+
+void BoneCollisionShape::_bind_methods() {
+    ClassDB::bind_method(D_METHOD("get_head_damage"), &BoneCollisionShape::get_head_damage);
+    ClassDB::bind_method(D_METHOD("set_head_damage", "m_HeadDamage"), &BoneCollisionShape::set_head_damage);
+    ADD_PROPERTY(PropertyInfo(Variant::INT, "m_HeadDamage"), "set_head_damage", "get_head_damage");
+
+    ClassDB::bind_method(D_METHOD("get_body_damage"), &BoneCollisionShape::get_body_damage);
+    ClassDB::bind_method(D_METHOD("set_body_damage", "m_BodyDamage"), &BoneCollisionShape::set_body_damage);
+    ADD_PROPERTY(PropertyInfo(Variant::INT, "m_BodyDamage"), "set_head_damage", "get_body_damage");
+
+	ADD_SIGNAL(MethodInfo("a_ZombieHeadShotHit", PropertyInfo(Variant::INT, "dam")));
+	ADD_SIGNAL(MethodInfo("a_ZombieBodyShotHit", PropertyInfo(Variant::INT, "dam")));
+
+    ClassDB::bind_method(D_METHOD("headshot_hit"), &BoneCollisionShape::headshot_hit);
+    ClassDB::bind_method(D_METHOD("bodyshot_hit"), &BoneCollisionShape::bodyshot_hit);
+}
+
+BoneCollisionShape::BoneCollisionShape() {}
+
+BoneCollisionShape::~BoneCollisionShape() {}
+
+void BoneCollisionShape::_ready() {
+    m_Crosshair = Object::cast_to<Crosshair>(get_parent()->get_parent()->get_parent()->get_parent()->get_parent()->get_parent()->get_parent()->find_child("Crosshair"));
+    DEV_ASSERT(m_Crosshair);
+}
+
+void BoneCollisionShape::set_head_damage(int a_D) {
+    m_HeadDamage = a_D;
+}
+
+int BoneCollisionShape::get_head_damage() const {
+    return m_HeadDamage;
+}
+
+void BoneCollisionShape::set_body_damage(int a_D) {
+    m_BodyDamage = a_D;
+}
+
+int BoneCollisionShape::get_body_damage() const {
+    return m_BodyDamage;
+}
+
+void BoneCollisionShape::headshot_hit() {
+    ERR_PRINT("zombie headshot hit");
+    m_Crosshair->set_dot_color(Color(1,0,0,1));
+    emit_signal("a_ZombieHeadShotHit", m_HeadDamage);
+}
+
+void BoneCollisionShape::bodyshot_hit() {
+    ERR_PRINT("zombie body hit");
+    m_Crosshair->set_dot_color(Color(0,0,1,1));
+    emit_signal("a_ZombieBodyShotHit", m_BodyDamage);
+}
+
+}  // namespace blitz

src/BoneCollisionShape.h

@@ -0,0 +1,32 @@
+#pragma once
+
+#include "Crosshair.h"
+#include <godot_cpp/classes/area3d.hpp>
+
+namespace blitz {
+class BoneCollisionShape : public godot::Area3D {
+
+	GDCLASS(BoneCollisionShape, godot::Area3D)
+
+  protected:
+	static void _bind_methods();
+
+  public:
+	BoneCollisionShape();
+	~BoneCollisionShape();
+
+	void _ready();
+	void headshot_hit();
+	void bodyshot_hit();
+
+  private:
+	int m_HeadDamage = 2;
+	int m_BodyDamage = 1;
+	void set_head_damage(int d);
+	int get_head_damage() const;
+	void set_body_damage(int d);
+	int get_body_damage() const;
+	Crosshair* m_Crosshair;
+};
+
+}  // namespace blitz

src/Bullet.cpp

@@ -1,4 +1,5 @@
 #include "Bullet.h"
+#include "BoneCollisionShape.h"
 
 using namespace godot;
 
@@ -21,9 +22,11 @@ void Bullet::_ready() {
 	DEV_ASSERT(m_Ray);
 	m_Mesh = Object::cast_to<MeshInstance3D>(find_child("MeshInstance3D"));
 	DEV_ASSERT(m_Mesh);
-	m_Timer = memnew(godot::Timer);
+	m_Timer = memnew(Timer);
 	add_child(m_Timer);
 	m_Timer->connect("timeout", callable_mp(this, &Bullet::_on_timer_timeout));
+	m_Crosshair = Object::cast_to<Crosshair>(get_parent()->find_child("Crosshair"));
+	DEV_ASSERT(m_Crosshair);
 }
 
 void Bullet::_physics_process(float a_Delta) {
@@ -33,12 +36,26 @@ void Bullet::_physics_process(float a_Delta) {
 	if (m_Ray->is_colliding()) {
 		m_Mesh->set_visible(false);
 		m_Particles->set_emitting(true);
+		m_Ray->set_enabled(false);
+		Object* collider = m_Ray->get_collider();
+
+		if (!collider)
+			return;
+
+		auto* area_collider = Object::cast_to<BoneCollisionShape>(collider);
+		if (!(area_collider && area_collider->is_in_group("enemy")))
+			return;
+
+		const StringName& area_name = area_collider->get_name();
+		area_collider->call(area_name.match("HeadArea3D") ? "headshot_hit" : "bodyshot_hit");
+
 		m_Timer->set_wait_time(1.0);
 		m_Timer->start();
 	}
 }
 
 void Bullet::_on_timer_timeout() {
+	m_Crosshair->set_dot_color(Color(1, 1, 1, 1));
 	queue_free();
 }
 

src/Bullet.h

@@ -1,5 +1,6 @@
 #pragma once
 
+#include "Crosshair.h"
 #include <godot_cpp/classes/gpu_particles3d.hpp>
 #include <godot_cpp/classes/mesh_instance3d.hpp>
 #include <godot_cpp/classes/node3d.hpp>
@@ -24,6 +25,7 @@ class Bullet : public godot::Node3D {
 	godot::RayCast3D* m_Ray;
 	godot::MeshInstance3D* m_Mesh;
 	godot::Timer* m_Timer;
+	Crosshair* m_Crosshair;
 
 	void _on_timer_timeout();
 };

src/Crosshair.cpp

@@ -0,0 +1,59 @@
+#include "Crosshair.h"
+
+using namespace godot;
+
+namespace blitz {
+void Crosshair::_bind_methods() {}
+
+Crosshair::Crosshair() :
+	m_DotRadius(1.0f),
+	m_DotColor(Color(1, 1, 1, 1)),
+	m_CrosshairSpeed(0.25f),
+	m_CrosshairDistance(2.0f),
+	m_Origin(Vector3(0, 0, 0)),
+	m_Pos(Vector2(0, 0)) {}
+Crosshair::~Crosshair() {}
+
+void Crosshair::_ready() {
+	m_Player = Object::cast_to<FirstPersonPlayer>(get_parent()->get_parent()->get_parent()->find_child("FirstPersonPlayer"));
+	DEV_ASSERT(m_Player);
+	m_CrosshairLines = {Object::cast_to<Line2D>(find_child("Top")), Object::cast_to<Line2D>(find_child("Right")),
+		Object::cast_to<Line2D>(find_child("Bottom")), Object::cast_to<Line2D>(find_child("Left"))};
+	for (size_t i = 0; i < m_CrosshairLines.size(); i++) {
+		DEV_ASSERT(m_CrosshairLines[i]);
+	}
+	queue_redraw();
+}
+
+void Crosshair::_process(float a_Delta) {
+	adjust_crosshair_lines();
+}
+
+void Crosshair::_draw() {
+	draw_circle(Vector2(0, 0), m_DotRadius, m_DotColor);
+}
+
+void Crosshair::adjust_crosshair_lines() {
+	Vector3 vel = m_Player->get_real_velocity();
+
+	float speed = m_Origin.distance_to(vel);
+
+	m_CrosshairLines[0]->set_position(
+		m_CrosshairLines[0]->get_position().lerp(m_Pos + Vector2(0, -speed * m_CrosshairDistance), m_CrosshairSpeed));
+
+	m_CrosshairLines[1]->set_position(
+		m_CrosshairLines[1]->get_position().lerp(m_Pos + Vector2(speed * m_CrosshairDistance, 0), m_CrosshairSpeed));
+
+	m_CrosshairLines[2]->set_position(
+		m_CrosshairLines[2]->get_position().lerp(m_Pos + Vector2(0, speed * m_CrosshairDistance), m_CrosshairSpeed));
+
+	m_CrosshairLines[3]->set_position(
+		m_CrosshairLines[3]->get_position().lerp(m_Pos + Vector2(-speed * m_CrosshairDistance, 0), m_CrosshairSpeed));
+}
+
+void Crosshair::set_dot_color(Color a_Color) {
+	m_DotColor = a_Color;
+	queue_redraw();
+}
+
+}  // namespace blitz

src/Crosshair.h

@@ -0,0 +1,35 @@
+#pragma once
+
+#include "FirstPersonPlayer.h"
+#include <godot_cpp/classes/center_container.hpp>
+#include <godot_cpp/classes/line2d.hpp>
+
+namespace blitz {
+class Crosshair : public godot::CenterContainer {
+	GDCLASS(Crosshair, godot::CenterContainer)
+  protected:
+	static void _bind_methods();
+
+  public:
+	Crosshair();
+	~Crosshair();
+
+	void _ready();
+	void _process(float delta);
+	void _draw();
+	void set_dot_color(godot::Color col);
+
+  private:
+	godot::Color m_DotColor;
+	float m_DotRadius;
+	std::array<godot::Line2D*, 4> m_CrosshairLines;
+	FirstPersonPlayer* m_Player;
+	float m_CrosshairSpeed;
+	float m_CrosshairDistance;
+	godot::Vector3 m_Origin;
+	godot::Vector2 m_Pos;
+
+	void adjust_crosshair_lines();
+};
+
+}  // namespace blitz

src/FirstPersonPlayer.cpp

@@ -6,6 +6,7 @@
 #include <godot_cpp/classes/input_map.hpp>
 #include <godot_cpp/classes/resource_loader.hpp>
 #include <godot_cpp/core/math.hpp>
+#include <godot_cpp/variant/signal.hpp>
 
 using namespace godot;
 
@@ -20,6 +21,8 @@ static constexpr float GRAVITY = 9.81f;
 
 static constexpr float SENSITIVITY = 0.003f;
 
+static constexpr float HIT_STAGGER = 8.0f;
+
 static constexpr float BOB_FREQ = 2.0f;
 static constexpr float BOB_AMP = 0.08f;
 
@@ -34,7 +37,9 @@ static constexpr float MIN_FOV_VELOCITY = 0.5;
 static constexpr float MAX_FOV_VELOCITY = SPRINT_SPEED * 2.0f;
 
 
-void FirstPersonPlayer::_bind_methods() {}
+void FirstPersonPlayer::_bind_methods() {
+	ADD_SIGNAL(MethodInfo("a_PlayerHit"));
+}
 
 FirstPersonPlayer::FirstPersonPlayer() : m_BobTime(0) {}
 
@@ -156,4 +161,9 @@ void FirstPersonPlayer::UpdateFOV(float a_Delta) {
 	m_Camera->set_fov(Math::lerp(m_Camera->get_fov(), targetFOV, a_Delta * FOV_TRANSITION));
 }
 
+void FirstPersonPlayer::hit(Vector3 a_Dir) {
+	emit_signal("a_PlayerHit");
+	this->set_velocity(a_Dir * HIT_STAGGER); 
+}
+
 }  // namespace blitz

src/FirstPersonPlayer.h

@@ -24,6 +24,7 @@ class FirstPersonPlayer : public godot::CharacterBody3D {
 	void _unhandled_input(const godot::Ref<godot::InputEvent>&);
 	void _physics_process(float delta);
 	void _ready();
+	void hit(godot::Vector3 dir);
 
   private:
 	godot::Camera3D* m_Camera;
@@ -39,6 +40,7 @@ class FirstPersonPlayer : public godot::CharacterBody3D {
 	void UpdateFOV(float delta);
 	void UpdateCamera(const godot::InputEventMouseMotion&);
 	void UpdatePosition(float delta);
+	
 };
 
 }  // namespace blitz

src/World.cpp

@@ -0,0 +1,87 @@
+#include "World.h"
+#include "FirstPersonPlayer.h"
+#include <godot_cpp/classes/engine.hpp>
+#include <godot_cpp/classes/resource_loader.hpp>
+#include <godot_cpp/variant/utility_functions.hpp>
+
+using namespace godot;
+
+namespace blitz {
+
+void World::_bind_methods() {
+	ClassDB::bind_method(D_METHOD("_on_first_person_player_hit"), &World::_on_first_person_player_hit);
+	ClassDB::bind_method(D_METHOD("_on_timer_timeout"), &World::_on_timer_timeout);
+	ClassDB::bind_method(D_METHOD("_on_zombie_spawn_timer_timeout"), &World::_on_zombie_spawn_timer_timeout);
+}
+
+World::World() {}
+World::~World() {}
+
+void World::_ready() {
+	FirstPersonPlayer* player = Object::cast_to<FirstPersonPlayer>(find_child("FirstPersonPlayer"));
+	DEV_ASSERT(player);
+	if (player) {
+		player->connect("a_PlayerHit", callable_mp(this, &World::_on_first_person_player_hit));
+	}
+
+	m_RedRect = Object::cast_to<ColorRect>(find_child("HitRect"));
+	DEV_ASSERT(m_RedRect);
+	m_Timer = memnew(Timer);
+	add_child(m_Timer);
+	m_Timer->connect("timeout", callable_mp(this, &World::_on_timer_timeout));
+	m_ZombieSpawnTimer = memnew(Timer);
+	add_child(m_ZombieSpawnTimer);
+	m_ZombieSpawnTimer->connect("timeout", callable_mp(this, &World::_on_zombie_spawn_timer_timeout));
+	m_Spawns = Object::cast_to<Node3D>(find_child("Spawns"));
+	DEV_ASSERT(m_Spawns);
+	m_NavigationRegion = Object::cast_to<NavigationRegion3D>(find_child("NavigationRegion3D"));
+	DEV_ASSERT(m_NavigationRegion);
+	m_ZombieScene = ResourceLoader::get_singleton()->load("res://Scenes/Characters/zombie.tscn");
+	if (!m_ZombieScene.is_valid()) {
+		ERR_PRINT("Failed to load zombie scene.");
+	}
+	m_RandomId.instantiate();
+	m_RandomId->randomize();
+	m_ZombieSpawnTimer->start();
+}
+
+void World::_on_first_person_player_hit() {
+#if DEBUG_ENABLED
+	if (Engine::get_singleton()->is_editor_hint()) {
+		return;
+	}
+#endif
+	UtilityFunctions::print("Player hit detected in World.");
+	m_RedRect->set_visible(true);
+	m_Timer->set_wait_time(0.2);
+	m_Timer->start();
+}
+
+void World::_on_timer_timeout() {
+	m_RedRect->set_visible(false);
+}
+
+Node* World::get_random_child(Node* a_ParentNode) {
+	m_ZombieSpawnTimer->set_wait_time(4.0);
+	if (!a_ParentNode || a_ParentNode->get_child_count() == 0) {
+		return nullptr;
+	}
+	int32_t id = m_RandomId->randi() % a_ParentNode->get_child_count();
+	return a_ParentNode->get_child(id);
+}
+
+void World::_on_zombie_spawn_timer_timeout() {
+#if DEBUG_ENABLED
+	if (Engine::get_singleton()->is_editor_hint()) {
+		return;
+	}
+#endif
+	auto spawns = Object::cast_to<Node3D>(World::get_random_child(m_Spawns));
+	auto spawn_points = spawns->get_global_position();
+	m_ZombieInstance = Object::cast_to<Zombie>(m_ZombieScene->instantiate());
+	DEV_ASSERT(m_ZombieInstance);
+	m_ZombieInstance->set_position(spawn_points);
+	m_NavigationRegion->add_child(m_ZombieInstance);
+}
+
+}  // namespace blitz

src/World.h

@@ -0,0 +1,40 @@
+#pragma once
+
+#include "Zombie.h"
+#include <godot_cpp/classes/color_rect.hpp>
+#include <godot_cpp/classes/navigation_region3d.hpp>
+#include <godot_cpp/classes/packed_scene.hpp>
+#include <godot_cpp/classes/random_number_generator.hpp>
+#include <godot_cpp/classes/ref.hpp>
+#include <godot_cpp/classes/timer.hpp>
+
+namespace blitz {
+class World : public godot::Node3D {
+
+	GDCLASS(World, godot::Node3D);
+
+  protected:
+	static void _bind_methods();
+
+  public:
+	World();
+	~World();
+
+	void _ready();
+
+  private:
+	godot::ColorRect* m_RedRect;
+	godot::Timer* m_Timer;
+	godot::Timer* m_ZombieSpawnTimer;
+	godot::Node3D* m_Spawns;
+	godot::NavigationRegion3D* m_NavigationRegion;
+	Zombie* m_ZombieInstance;
+	godot::Ref<godot::PackedScene> m_ZombieScene;
+	godot::Ref<godot::RandomNumberGenerator> m_RandomId;
+
+	void _on_timer_timeout();
+	void _on_zombie_spawn_timer_timeout();
+	void _on_first_person_player_hit();
+	Node* get_random_child(Node* parent_node);
+};
+}  // namespace blitz

src/Zombie.cpp

@@ -1,18 +1,24 @@
 #include "Zombie.h"
 
 #include <godot_cpp/classes/engine.hpp>
-#include <godot_cpp/variant/utility_functions.hpp>
+#include <godot_cpp/classes/scene_tree.hpp>
+#include <godot_cpp/classes/window.hpp>
+#include <godot_cpp/core/math.hpp>
 
 using namespace godot;
 
 namespace blitz {
 
 static constexpr float SPEED = 2.0f;
-
+static constexpr float ATTACK_RANGE = 2.0f;
 
 void Zombie::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("set_m_PlayerPath", "m_PlayerPath"), &Zombie::set_m_PlayerPath);
 	ClassDB::bind_method(D_METHOD("get_m_PlayerPath"), &Zombie::get_m_PlayerPath);
+	ClassDB::bind_method(D_METHOD("hit_finished"), &Zombie::hit_finished);
+	ClassDB::bind_method(D_METHOD("_on_area_3d_a_zombie_head_shot_hit", "m_Health"), &Zombie::_on_area_3d_a_zombie_head_shot_hit);
+	ClassDB::bind_method(D_METHOD("_on_area_3d_a_zombie_body_shot_hit", "m_Health"), &Zombie::_on_area_3d_a_zombie_body_shot_hit);
+	ClassDB::bind_method(D_METHOD("_on_timer_timeout"), &Zombie::_on_timer_timeout);
 
 	ADD_PROPERTY(PropertyInfo(Variant::NODE_PATH, "m_PlayerPath"), "set_m_PlayerPath", "get_m_PlayerPath");
 }
@@ -28,11 +34,27 @@ void Zombie::_ready() {
 	}
 #endif
 
-	m_Player = Object::cast_to<FirstPersonPlayer>(get_parent()->get_parent()->find_child("FirstPersonPlayer"));
-	DEV_ASSERT(m_Player);
+	godot::Node* scene_root = Object::cast_to<godot::Node>(get_tree()->get_root()->get_child(0));
+	if (scene_root) {
+		m_Player = Object::cast_to<FirstPersonPlayer>(scene_root->find_child("FirstPersonPlayer", true));
+		DEV_ASSERT(m_Player);
+	} else {
+		ERR_PRINT("Scene root not found or invalid.");
+	}
 	m_NavigationAgent = Object::cast_to<NavigationAgent3D>(find_child("NavigationAgent3D"));
 	DEV_ASSERT(m_NavigationAgent);
-	m_Velocity = Vector3(0, 0, 0);
+	m_AnimationTree = Object::cast_to<AnimationTree>(find_child("AnimationTree"));
+	DEV_ASSERT(m_AnimationTree);
+	m_StateMachine = Object::cast_to<AnimationNodeStateMachinePlayback>(m_AnimationTree->get("parameters/playback"));
+	DEV_ASSERT(m_StateMachine);
+	this->set_velocity(Vector3(0, 0, 0));
+	m_HeadCollision = Object::cast_to<BoneCollisionShape>(find_child("HeadArea3D"));
+	DEV_ASSERT(m_HeadCollision);
+	m_HeadCollision->connect("a_ZombieHeadShotHit", Callable(this, "_on_area_3d_a_zombie_head_shot_hit"));
+	connect_collision_shapes(m_BodyPartsCollision);
+	m_Timer = memnew(Timer);
+	add_child(m_Timer);
+	m_Timer->connect("timeout", callable_mp(this, &Zombie::_on_timer_timeout));
 }
 
 void Zombie::_process(float a_Delta) {
@@ -41,15 +63,28 @@ void Zombie::_process(float a_Delta) {
 		return;
 	}
 #endif
-    this->set_velocity(m_Velocity);
-	m_NavigationAgent->set_target_position(m_Player->get_global_position());
-	Vector3 next_nav_point = m_NavigationAgent->get_next_path_position();
-	m_Velocity = (next_nav_point - get_global_position()).normalized() * SPEED;
-    this->set_velocity(m_Velocity);
-    look_at(Vector3(m_Player->get_global_position().x, get_global_position().y, m_Player->get_global_position().z), Vector3(0, 1, 0));
+	if (m_StateMachine->get_current_node().match("Run")) {
+		m_NavigationAgent->set_target_position(m_Player->get_global_position());
+		m_Velocity = (m_NavigationAgent->get_next_path_position() - this->get_global_position()).normalized() * SPEED;
+		this->set_velocity(m_Velocity);
+		look_at(Vector3(this->get_global_position().x + this->get_velocity().x, this->get_global_position().y,
+			this->get_global_position().z + this->get_velocity().z));
+
+	} else if (m_StateMachine->get_current_node().match("Attack")) {
+		this->set_velocity(Vector3(0, 0, 0));
+		look_at(Vector3(m_Player->get_global_position().x + this->get_velocity().x, this->get_global_position().y,
+			m_Player->get_global_position().z + this->get_velocity().z));
+	}
+	m_AnimationTree->set("parameters/conditions/run", !_target_in_range());
+	m_AnimationTree->set("parameters/conditions/attack", _target_in_range());
+
 	move_and_slide();
 }
 
+bool Zombie::_target_in_range() {
+	return this->get_global_position().distance_to(m_Player->get_global_position()) < ATTACK_RANGE;
+}
+
 void Zombie::set_m_PlayerPath(const NodePath& path) {
 	m_PlayerPath = path;
 }
@@ -57,4 +92,43 @@ void Zombie::set_m_PlayerPath(const NodePath& path) {
 NodePath Zombie::get_m_PlayerPath() const {
 	return m_PlayerPath;
 }
+
+void Zombie::hit_finished() {
+	if (this->get_global_position().distance_to(m_Player->get_global_position()) < (ATTACK_RANGE + 1.0)) {
+		Vector3 dir = this->get_global_position().direction_to(m_Player->get_global_position());
+		m_Player->hit(dir);
+	}
+}
+
+void Zombie::apply_damage(int dam) {
+	m_Health -= dam;
+	if (m_Health <= 0) {
+		m_AnimationTree->set("parameters/conditions/die", true);
+		this->set_velocity(Vector3(0, 0, 0));
+		m_Timer->set_wait_time(4.0);
+		m_Timer->start();
+	}
+}
+
+void Zombie::_on_area_3d_a_zombie_head_shot_hit(int dam) {
+	apply_damage(dam);
+}
+
+void Zombie::_on_area_3d_a_zombie_body_shot_hit(int dam) {
+	apply_damage(dam);
+}
+
+void Zombie::connect_collision_shapes(const std::vector<StringName>& body_parts) {
+	for (const StringName& part : body_parts) {
+		StringName area_name = String(part) + "Area3D";
+		BoneCollisionShape* collision_shape = Object::cast_to<BoneCollisionShape>(find_child(area_name));
+		DEV_ASSERT(collision_shape);
+		collision_shape->connect("a_ZombieBodyShotHit", Callable(this, "_on_area_3d_a_zombie_body_shot_hit"));
+	}
+}
+
+void Zombie::_on_timer_timeout() {
+	queue_free();
+}
+
 }  // namespace blitz

src/Zombie.h

@@ -1,12 +1,17 @@
 #pragma once
 
+#include "BoneCollisionShape.h"
+#include "FirstPersonPlayer.h"
+#include <godot_cpp/classes/animation_node_state_machine_playback.hpp>
+#include <godot_cpp/classes/animation_tree.hpp>
 #include <godot_cpp/classes/character_body3d.hpp>
 #include <godot_cpp/classes/navigation_agent3d.hpp>
 #include <godot_cpp/variant/node_path.hpp>
-#include "FirstPersonPlayer.h"
-
+#include <godot_cpp/variant/string_name.hpp>
+#include <godot_cpp/classes/timer.hpp>
 
 namespace blitz {
+
 class Zombie : public godot::CharacterBody3D {
 	GDCLASS(Zombie, godot::CharacterBody3D)
   protected:
@@ -18,16 +23,29 @@ class Zombie : public godot::CharacterBody3D {
 
 	void _ready();
 	void _process(float delta);
+	bool _target_in_range();
+	void _on_area_3d_a_zombie_head_shot_hit(int dam);
+	void _on_area_3d_a_zombie_body_shot_hit(int dam);
 
   private:
 	godot::NavigationAgent3D* m_NavigationAgent;
 	FirstPersonPlayer* m_Player;
 	godot::NodePath m_PlayerPath;
 	godot::Vector3 m_Velocity;
+	godot::AnimationTree* m_AnimationTree;
+	godot::AnimationNodeStateMachinePlayback* m_StateMachine;
+	BoneCollisionShape* m_HeadCollision;
+	std::vector<godot::StringName> m_BodyPartsCollision = {"Neck", "Spine", "Hips", "LeftArm", "LeftForearm", "LeftHand", "RightArm",
+		"RightForearm", "RightHand", "LeftUpLeg", "RightUpLeg", "LeftLeg", "RightLeg", "LeftFoot", "RightFoot"};
+	int m_Health = 6;
+	godot::Timer* m_Timer;
 
 	void set_m_PlayerPath(const godot::NodePath& path);
-
 	godot::NodePath get_m_PlayerPath() const;
+	void hit_finished();
+	void apply_damage(int dam);
+	void connect_collision_shapes(const std::vector<godot::StringName>& body_parts);
+	void _on_timer_timeout();
 };
 
 }  // namespace blitz

src/register_types.cpp

@@ -1,10 +1,13 @@
 #include "register_types.h"
 
+#include "BoneCollisionShape.h"
 #include "Bullet.h"
 #include "FirstPersonPlayer.h"
 #include "Player.h"
 #include "SpringArmPivot.h"
+#include "World.h"
 #include "Zombie.h"
+#include  "Crosshair.h"
 
 #include <gdextension_interface.h>
 #include <godot_cpp/core/defs.hpp>
@@ -22,6 +25,9 @@ void initialize_example_module(ModuleInitializationLevel p_level) {
 	ClassDB::register_class<blitz::FirstPersonPlayer>();
 	ClassDB::register_class<blitz::Bullet>();
 	ClassDB::register_class<blitz::Zombie>();
+	ClassDB::register_class<blitz::BoneCollisionShape>();
+	ClassDB::register_class<blitz::World>();
+	ClassDB::register_class<blitz::Crosshair>();
 }
 
 void uninitialize_example_module(ModuleInitializationLevel p_level) {