234 lines
9.6 KiB
C++
234 lines
9.6 KiB
C++
// collision_system.cpp - Implementación del sistema de colisiones
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#include "game/systems/collision_system.hpp"
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#include <cstdint>
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#include "core/audio/audio.hpp"
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#include "core/physics/collision.hpp"
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#include "core/types.hpp"
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#include "game/constants.hpp"
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#include "game/entities/bullet_config.hpp"
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#include "game/systems/enemy_event_dispatcher.hpp"
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namespace Systems::Collision {
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namespace {
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// Trenca una bala en debris (8 fragments de l'octàgon) + so HIT + desactiva.
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// S'invoca des de qualsevol desactivació de bala (impacte amb enemic, amb jugador,
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// o sortida del PLAYAREA) per a un feedback visual i sonor consistent.
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void breakBullet(Effects::DebrisManager& debris_manager, Bullet& bullet) {
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constexpr float DEBRIS_VELOCITY = 60.0F;
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debris_manager.explode(
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bullet.getShape(),
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bullet.getCenter(),
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bullet.getAngle(),
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1.0F, // scale
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DEBRIS_VELOCITY,
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bullet.getBrightness(),
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Vec2{}, // sense herència de velocitat (fragments radials)
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0.0F, // sense velocity angular heretada
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0.0F, // sense rotació visual heretada
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Defaults::Sound::HIT,
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bullet.getConfig().colors.normal,
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Defaults::Physics::Debris::TEMPS_VIDA,
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Defaults::Physics::Debris::ACCELERACIO,
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1); // sense duplicat de segments
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bullet.desactivar();
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}
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} // anonymous namespace
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void detectBulletEnemy(Context& ctx) {
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constexpr float AMPLIFIER = Defaults::Game::COLLISION_BULLET_ENEMY_AMPLIFIER;
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for (auto& bullet : ctx.bullets) {
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if (!bullet.isActive()) {
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continue;
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}
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for (auto& enemy : ctx.enemies) {
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if (!Physics::checkCollisionSwept(bullet.getPrevPosition(), bullet.getCenter(), bullet.getCollisionRadius(), enemy, AMPLIFIER)) {
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continue;
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}
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// *** COLISIÓN bullet → enemy ***
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// La cadena d'efectes (impulse, hurt, destroy, debris, score...) viu
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// al YAML de l'enemic via la secció `events:`. Aquí només dispatchem.
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Systems::EnemyEvents::dispatchEvent(ctx, enemy, EnemyEventType::ON_HIT, bullet.getOwnerId(), &bullet);
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breakBullet(ctx.debris_manager, bullet);
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break;
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}
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}
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}
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void processWoundedDeaths(Context& ctx) {
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for (auto& enemy : ctx.enemies) {
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if (!enemy.woundExpiredThisFrame()) {
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continue;
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}
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enemy.consumeWoundExpired();
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Systems::EnemyEvents::dispatchEvent(ctx, enemy, EnemyEventType::ON_HURT_END, enemy.getLastHitBy());
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}
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}
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void detectWoundedChain(Context& ctx) {
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const std::size_t N = ctx.enemies.size();
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for (std::size_t i = 0; i < N; i++) {
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Enemy& a = ctx.enemies[i];
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if (!a.isCollidable()) {
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continue;
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}
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for (std::size_t j = i + 1; j < N; j++) {
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Enemy& b = ctx.enemies[j];
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if (!b.isCollidable()) {
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continue;
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}
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const bool A_WOUNDED = a.isWounded();
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const bool B_WOUNDED = b.isWounded();
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if (A_WOUNDED == B_WOUNDED) {
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continue; // ambos sanos o ambos heridos: nada que propagar
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}
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if (!Physics::checkCollision(a, b, Defaults::Game::COLLISION_WOUNDED_CHAIN_AMPLIFIER)) {
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continue;
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}
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// El sano queda herido, propagando el shooter original.
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if (A_WOUNDED) {
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b.hurt(a.getLastHitBy());
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} else {
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a.hurt(b.getLastHitBy());
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}
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}
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}
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}
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void detectShipEnemy(Context& ctx) {
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constexpr float AMPLIFIER = Defaults::Game::COLLISION_SHIP_ENEMY_AMPLIFIER;
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for (uint8_t i = 0; i < 2; i++) {
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// Skip si ya tocado / muerto / invulnerable. NO actualitzem el flag de contacte:
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// mentre estem inactius no hi ha "frame anterior" rellevant, i el respawn ja el resetea.
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if (ctx.hit_timer_per_player[i] > 0.0F ||
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!ctx.ships[i].isActive() ||
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ctx.ships[i].isInvulnerable()) {
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continue;
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}
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// Comprovem si la nau toca QUALSEVOL enemic vulnerable aquest frame.
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Enemy* touched_enemy = nullptr;
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for (auto& enemy : ctx.enemies) {
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if (enemy.isInvulnerable()) {
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continue;
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}
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if (Physics::checkCollision(ctx.ships[i], enemy, AMPLIFIER)) {
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touched_enemy = &enemy;
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break;
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}
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}
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const bool TOUCHING_NOW = touched_enemy != nullptr;
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// Edge-trigger: només compta com a impacte la transició no-tocant → tocant.
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// Així el contacte continu durant el rebot frame-a-frame no dispara HURT i mort
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// en frames consecutius.
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const bool RISING_EDGE = TOUCHING_NOW && !ctx.ships[i].wasTouchingEnemyPrevFrame();
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if (RISING_EDGE) {
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if (ctx.ships[i].isHurt()) {
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// Segon impacte durant HURT → mort. Aplica un impuls afegit
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// perquè l'enemic surti disparat (feedback visible).
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const Vec2 SHIP_VEL = ctx.ships[i].getVelocityVector();
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const float DEATH_FACTOR = ctx.ships[i].getConfig().physics.death_impact_factor;
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const Vec2 IMPULSE = SHIP_VEL * (ctx.ships[i].getBody().mass * DEATH_FACTOR);
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touched_enemy->applyImpulse(IMPULSE);
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ctx.on_player_hit(i);
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} else {
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// Primer impacte → estat HURT (rebot físic ja resolt per PhysicsWorld;
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// l'enemic no rep dany per decisió de disseny).
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ctx.ships[i].hurt();
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}
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}
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ctx.ships[i].setTouchingEnemyPrevFrame(TOUCHING_NOW);
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}
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}
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void detectBulletPlayer(Context& ctx) {
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if (!Defaults::Game::FRIENDLY_FIRE_ENABLED) {
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return;
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}
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constexpr float AMPLIFIER = Defaults::Game::COLLISION_BULLET_PLAYER_AMPLIFIER;
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for (auto& bullet : ctx.bullets) {
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if (!bullet.isActive()) {
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continue;
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}
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const uint8_t BULLET_OWNER = bullet.getOwnerId();
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for (uint8_t player_id = 0; player_id < 2; player_id++) {
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// Una bala mai no impacta al seu propi shooter: les bales d'aquest joc no
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// reboten ni el shooter pot atrapar-les, així que la prevenció és per disseny.
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if (BULLET_OWNER == player_id) {
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continue;
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}
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if (ctx.hit_timer_per_player[player_id] > 0.0F ||
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!ctx.ships[player_id].isActive() ||
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ctx.ships[player_id].isInvulnerable()) {
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continue;
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}
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const bool JUGADOR_ACTIU = (player_id == 0)
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? ctx.match_config.player1_active
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: ctx.match_config.player2_active;
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if (!JUGADOR_ACTIU) {
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continue;
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}
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if (!Physics::checkCollisionSwept(bullet.getPrevPosition(), bullet.getCenter(), bullet.getCollisionRadius(), ctx.ships[player_id], AMPLIFIER)) {
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continue;
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}
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// *** TEAMMATE HIT (friendly fire) ***
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// Víctima perd 1 vida, atacant en guanya 1. Apliquem l'impuls
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// de la bala a la nau ABANS de on_player_hit perquè tocado()
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// captura la velocitat per als debris (si no, queden quiets).
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const Vec2 BULLET_IMPULSE = bullet.getBody().velocity *
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(bullet.getBody().mass * bullet.getConfig().physics.impact_momentum_factor);
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ctx.ships[player_id].getBody().applyImpulse(BULLET_IMPULSE);
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ctx.on_player_hit(player_id);
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ctx.lives_per_player[BULLET_OWNER]++;
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Audio::get()->playSound(Defaults::Sound::FRIENDLY_FIRE_HIT, Audio::Group::GAME);
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breakBullet(ctx.debris_manager, bullet);
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break; // Una bullet solo impacta una vez por frame
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}
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}
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}
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void detectAll(Context& ctx) {
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processWoundedDeaths(ctx); // expiran ANTES de ser tocadas por bala este frame
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detectBulletEnemy(ctx);
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detectWoundedChain(ctx); // un herit pot ferir a un sa al fregar-lo
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detectShipEnemy(ctx);
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detectBulletPlayer(ctx);
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}
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void desactivateOutOfBoundsBullets(
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std::array<Bullet, static_cast<std::size_t>(Defaults::Entities::MAX_BULLETS) * 2>& bullets,
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Effects::DebrisManager& debris_manager) {
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float min_x;
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float max_x;
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float min_y;
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float max_y;
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Constants::getPlayAreaBounds(min_x, max_x, min_y, max_y);
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for (auto& bullet : bullets) {
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if (!bullet.isActive()) {
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continue;
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}
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const float R = bullet.getCollisionRadius();
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const Vec2& pos = bullet.getCenter();
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if (pos.x < min_x + R || pos.x > max_x - R ||
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pos.y < min_y + R || pos.y > max_y - R) {
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breakBullet(debris_manager, bullet);
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}
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}
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}
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} // namespace Systems::Collision
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