1 files changed, 206 insertions, 0 deletions
diff --git a/game/enemy/EnemyScript.cpp b/game/enemy/EnemyScript.cpp
new file mode 100644
index 0000000..0822c29
--- /dev/null
+++ b/game/enemy/EnemyScript.cpp
@@ -0,0 +1,206 @@
+#include "EnemyScript.h"
+#include "../Config.h"
+#include "../Random.h"
+#include "../enemy/EnemyConfig.h"
+#include "api/Color.h"
+#include "api/Sprite.h"
+#include <crepe/api/AI.h>
+#include <crepe/api/Animator.h>
+#include <crepe/api/AudioSource.h>
+#include <crepe/api/BoxCollider.h>
+#include <crepe/api/ParticleEmitter.h>
+#include <crepe/api/Rigidbody.h>
+#include <crepe/api/Sprite.h>
+#include <crepe/api/Transform.h>
+#include <crepe/types.h>
+#include <random>
+using namespace crepe;
+using namespace std;
+EnemyScript::EnemyScript() {
+	engine.seed(rd());
+	this->last_fired = std::chrono::steady_clock::now();
+	this->shot_delay = std::chrono::duration<float>(1.5 + Random::f(2, 0));
+}
+void EnemyScript::init() {
+	Metadata & meta = this->get_component<Metadata>();
+	this->subscribe<SpawnEnemyEvent>(
+		[this](const SpawnEnemyEvent & e) -> bool { return this->spawn_enemy(e); },
+		meta.game_object_id
+	);
+	this->subscribe<CollisionEvent>([this](const CollisionEvent & e) -> bool {
+		return this->on_collide(e);
+	});
+};
+void EnemyScript::fixed_update(duration_t dt) {
+	if (!spawned) return;
+	auto now = std::chrono::steady_clock::now();
+	std::chrono::duration<float> elapsed_hit = now - last_hit;
+	//hit blink timer
+	if (elapsed_hit > blink_time) {
+		set_hit_blink(false);
+	}
+	Transform & transform = this->get_component<Transform>();
+	if (!this->alive) {
+		Camera & camera = this->get_components_by_name<Camera>("camera").front();
+		Transform & cam_transform = this->get_components_by_name<Transform>("camera").front();
+		vec2 half_screen = camera.viewport_size / 2;
+		float x_value = cam_transform.position.x - half_screen.x - 100;
+		if (transform.position.x < x_value) {
+			this->despawn_enemy();
+		}
+		return;
+	}
+
+	Transform & player_transform = this->get_components_by_name<Transform>("player").front();
+	Rigidbody & enemy_body = this->get_component<Rigidbody>();
+	AI & ai_component = this->get_component<AI>();
+
+	float direction_to_player_y = player_transform.position.y - transform.position.y;
+	float distance_to_player_y = std::abs(direction_to_player_y);
+
+	float adjustment_speed = speed * (distance_to_player_y / MAX_DISTANCE);
+	adjustment_speed = std::clamp(adjustment_speed, MIN_SPEED, MAX_SPEED);
+	Rigidbody & player_body = this->get_components_by_tag<Rigidbody>("player").front();
+	// move path nodes
+	for (vec2 & path_node : ai_component.path) {
+		path_node.y += (direction_to_player_y > 0 ? 1 : -1) * adjustment_speed * dt.count();
+		path_node.x += player_body.data.linear_velocity.x * dt.count();
+	}
+	//bullet fire logic:
+
+	std::chrono::duration<float> elapsed = now - last_fired;
+	if (elapsed > shot_delay) {
+		this->shoot(transform.position);
+		last_fired = now;
+		this->shot_delay = std::chrono::duration<float>(Random::f(3, 1.5));
+	}
+}
+
+bool EnemyScript::spawn_enemy(const SpawnEnemyEvent & e) {
+
+	this->speed = e.speed;
+	this->alive = true;
+	this->spawned = true;
+	this->health = 2;
+	RefVector<Animator> animators = this->get_components<Animator>();
+	for (Animator & anim : animators) {
+		anim.active = false;
+		anim.set_anim(0);
+	}
+	RefVector<Sprite> sprites = this->get_components<Sprite>();
+	for (Sprite & sprite : sprites) {
+		sprite.data.position_offset.x = 0;
+	}
+	Sprite & jetpack = sprites[2];
+	jetpack.data.position_offset.x = 20;
+	Sprite & gun = sprites[3];
+	gun.data.position_offset.x = -20;
+	AI & ai_component = this->get_component<AI>();
+	Transform & transform = this->get_component<Transform>();
+	Camera & camera = this->get_components_by_name<Camera>("camera").front();
+	Transform & cam_transform = this->get_components_by_name<Transform>("camera").front();
+	Rigidbody & rb = this->get_component<Rigidbody>();
+	rb.data.collision_layers = {COLL_LAY_BOT_TOP, COLL_LAY_PLAYER_BULLET};
+	rb.data.collision_layer = COLL_LAY_ENEMY;
+	vec2 half_screen = camera.viewport_size / 2;
+	float x_value = cam_transform.position.x + half_screen.x - 40 * (1 + e.column);
+	uniform_real_distribution<float> dist(
+		cam_transform.position.y - half_screen.y + 100,
+		cam_transform.position.y + half_screen.y - 100
+	);
+	float random_height = dist(engine);
+	vec2 spawn_location
+		= {cam_transform.position.x + camera.viewport_size.x / 2 + 100, random_height};
+	transform.position = spawn_location;
+	ai_component.path.clear();
+	ai_component.make_oval_path(10, 30, vec2 {x_value, random_height}, 1.5708, true);
+	ai_component.active = true;
+	this->last_fired = std::chrono::steady_clock::now();
+
+	return false;
+}
+
+void EnemyScript::set_hit_blink(bool status) {
+	RefVector<Sprite> sprites = this->get_components<Sprite>();
+	for (Sprite & sprite : sprites) {
+		if (status) {
+			sprite.data.color = Color::RED;
+			continue;
+		}
+		sprite.data.color = Color::WHITE;
+	}
+}
+
+bool EnemyScript::on_collide(const CollisionEvent & e) {
+	if (!this->alive) return false;
+	if (e.info.other.metadata.tag == "player_bullet") {
+		this->health--;
+		last_hit = std::chrono::steady_clock::now();
+		//Sprite& sprite;
+		set_hit_blink(true);
+		if (health <= 0) {
+			this->death();
+		}
+	}
+
+	//body_animator.play();
+
+	return false;
+}
+void EnemyScript::death() {
+
+	Rigidbody & rb = this->get_component<Rigidbody>();
+	Transform & tr = this->get_component<Transform>();
+	RefVector<Animator> animators = this->get_components<Animator>();
+	for (Animator & anim : animators) {
+		anim.active = false;
+		anim.set_anim(3);
+	}
+	RefVector<Sprite> sprites = this->get_components<Sprite>();
+	for (Sprite & sprite : sprites) {
+		sprite.data.position_offset.x = 15;
+	}
+	rb.data.linear_velocity_coefficient = {0.5, 1};
+	rb.data.collision_layers = {COLL_LAY_BOT_TOP};
+	rb.data.collision_layer = 0;
+
+	rb.data.gravity_scale = 1;
+	tr.rotation = 90;
+	AI & ai = this->get_component<AI>();
+	ai.active = false;
+	this->alive = false;
+	AI & ai_component = this->get_component<AI>();
+	ai_component.active = false;
+}
+void EnemyScript::despawn_enemy() {
+	Transform & transform = this->get_component<Transform>();
+	Rigidbody & rb = this->get_component<Rigidbody>();
+	rb.data.gravity_scale = 0;
+	rb.data.linear_velocity = {0, 0};
+	transform.rotation = 0;
+	transform.position = ENEMY_POOL_LOCATION;
+
+	this->spawned = false;
+}
+
+void EnemyScript::shoot(const vec2 & location) {
+	RefVector<Transform> bullet_transforms
+		= this->get_components_by_tag<Transform>("enemy_bullet");
+
+	for (Transform & bullet_pos : bullet_transforms) {
+		if (bullet_pos.position.x == 0 && bullet_pos.position.y == -750) {
+
+			bullet_pos.position = location;
+			bullet_pos.position.x -= 20;
+			Rigidbody & bullet_body
+				= this->get_components_by_id<Rigidbody>(bullet_pos.game_object_id).front();
+			BoxCollider bullet_collider
+				= this->get_components_by_id<BoxCollider>(bullet_pos.game_object_id).front();
+			bullet_collider.active = true;
+			bullet_body.active = true;
+			AudioSource & audio = this->get_component<AudioSource>();
+			audio.play();
+			return;
+		}
+	}
+}