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#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;
}
}
}
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