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515 lines
19 KiB
C++
515 lines
19 KiB
C++
// enemic.cpp - Implementació d'enemics (ORNIs)
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// © 1999 Visente i Sergi (versió Pascal)
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// © 2025 Port a C++20 amb SDL3
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#include "game/entities/enemic.hpp"
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#include <cmath>
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#include <cstdlib>
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#include <iostream>
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#include "core/defaults.hpp"
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#include "core/graphics/shape_loader.hpp"
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#include "core/rendering/shape_renderer.hpp"
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#include "game/constants.hpp"
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Enemic::Enemic(SDL_Renderer* renderer)
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: renderer_(renderer),
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centre_({0.0F, 0.0F}),
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angle_(0.0F),
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velocitat_(0.0F),
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drotacio_(0.0F),
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rotacio_(0.0F),
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esta_(false),
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brightness_(Defaults::Brightness::ENEMIC),
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tipus_(TipusEnemic::PENTAGON),
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tracking_timer_(0.0F),
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ship_position_(nullptr),
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tracking_strength_(0.5F), // Default tracking strength
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timer_invulnerabilitat_(0.0F) { // Start vulnerable
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// [NUEVO] Forma es carrega a inicialitzar() segons el tipus
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// Constructor no carrega forma per permetre tipus diferents
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}
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void Enemic::inicialitzar(TipusEnemic tipus, const Punt* ship_pos) {
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// Guardar tipus
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tipus_ = tipus;
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// Carregar forma segons el tipus
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const char* shape_file;
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float drotacio_min, drotacio_max;
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switch (tipus_) {
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case TipusEnemic::PENTAGON:
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shape_file = Defaults::Enemies::Pentagon::SHAPE_FILE;
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velocitat_ = Defaults::Enemies::Pentagon::VELOCITAT;
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drotacio_min = Defaults::Enemies::Pentagon::DROTACIO_MIN;
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drotacio_max = Defaults::Enemies::Pentagon::DROTACIO_MAX;
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break;
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case TipusEnemic::QUADRAT:
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shape_file = Defaults::Enemies::Quadrat::SHAPE_FILE;
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velocitat_ = Defaults::Enemies::Quadrat::VELOCITAT;
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drotacio_min = Defaults::Enemies::Quadrat::DROTACIO_MIN;
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drotacio_max = Defaults::Enemies::Quadrat::DROTACIO_MAX;
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tracking_timer_ = 0.0F;
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break;
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case TipusEnemic::MOLINILLO:
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shape_file = Defaults::Enemies::Molinillo::SHAPE_FILE;
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velocitat_ = Defaults::Enemies::Molinillo::VELOCITAT;
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drotacio_min = Defaults::Enemies::Molinillo::DROTACIO_MIN;
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drotacio_max = Defaults::Enemies::Molinillo::DROTACIO_MAX;
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break;
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}
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// Carregar forma
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forma_ = Graphics::ShapeLoader::load(shape_file);
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if (!forma_ || !forma_->es_valida()) {
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std::cerr << "[Enemic] Error: no s'ha pogut carregar " << shape_file << std::endl;
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}
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// [MODIFIED] Posició aleatòria amb comprovació de seguretat
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float min_x, max_x, min_y, max_y;
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Constants::obtenir_limits_zona_segurs(Defaults::Entities::ENEMY_RADIUS,
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min_x,
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max_x,
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min_y,
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max_y);
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if (ship_pos != nullptr) {
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// [NEW] Safe spawn: attempt to find position away from ship
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bool found_safe_position = false;
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for (int attempt = 0; attempt < Defaults::Enemies::Spawn::MAX_SPAWN_ATTEMPTS; attempt++) {
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float candidate_x, candidate_y;
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if (intent_spawn_safe(*ship_pos, candidate_x, candidate_y)) {
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centre_.x = candidate_x;
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centre_.y = candidate_y;
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found_safe_position = true;
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break;
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}
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}
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if (!found_safe_position) {
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// Fallback: spawn anywhere (user's preference)
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int range_x = static_cast<int>(max_x - min_x);
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int range_y = static_cast<int>(max_y - min_y);
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centre_.x = static_cast<float>((std::rand() % range_x) + static_cast<int>(min_x));
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centre_.y = static_cast<float>((std::rand() % range_y) + static_cast<int>(min_y));
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std::cout << "[Enemic] Advertència: spawn sense zona segura després de "
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<< Defaults::Enemies::Spawn::MAX_SPAWN_ATTEMPTS << " intents" << std::endl;
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}
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} else {
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// [EXISTING] No ship position: spawn anywhere (backward compatibility)
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int range_x = static_cast<int>(max_x - min_x);
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int range_y = static_cast<int>(max_y - min_y);
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centre_.x = static_cast<float>((std::rand() % range_x) + static_cast<int>(min_x));
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centre_.y = static_cast<float>((std::rand() % range_y) + static_cast<int>(min_y));
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}
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// Angle aleatori de moviment
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angle_ = (std::rand() % 360) * Constants::PI / 180.0F;
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// Rotació visual aleatòria (rad/s) dins del rang del tipus
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float drotacio_range = drotacio_max - drotacio_min;
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drotacio_ = drotacio_min + (static_cast<float>(std::rand()) / RAND_MAX) * drotacio_range;
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rotacio_ = 0.0F;
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// Inicialitzar estat d'animació
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animacio_ = AnimacioEnemic(); // Reset to defaults
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animacio_.drotacio_base = drotacio_;
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animacio_.drotacio_objetivo = drotacio_;
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animacio_.drotacio_t = 1.0F; // Start without interpolating
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// [NEW] Inicialitzar invulnerabilitat
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timer_invulnerabilitat_ = Defaults::Enemies::Spawn::INVULNERABILITY_DURATION; // 3.0s
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brightness_ = Defaults::Enemies::Spawn::INVULNERABILITY_BRIGHTNESS_START; // 0.3f
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// Activar
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esta_ = true;
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}
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void Enemic::actualitzar(float delta_time) {
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if (esta_) {
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// [NEW] Update invulnerability timer and brightness
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if (timer_invulnerabilitat_ > 0.0F) {
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timer_invulnerabilitat_ -= delta_time;
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if (timer_invulnerabilitat_ < 0.0F) {
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timer_invulnerabilitat_ = 0.0F;
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}
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// [NEW] Update brightness with LERP during invulnerability
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float t_inv = timer_invulnerabilitat_ / Defaults::Enemies::Spawn::INVULNERABILITY_DURATION;
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float t = 1.0F - t_inv; // 0.0 → 1.0
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float smooth_t = t * t * (3.0F - 2.0F * t); // smoothstep
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constexpr float START = Defaults::Enemies::Spawn::INVULNERABILITY_BRIGHTNESS_START;
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constexpr float END = Defaults::Enemies::Spawn::INVULNERABILITY_BRIGHTNESS_END;
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brightness_ = START + (END - START) * smooth_t;
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}
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// Moviment autònom
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mou(delta_time);
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// Actualitzar animacions (palpitació, rotació accelerada)
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actualitzar_animacio(delta_time);
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// Rotació visual (time-based: drotacio_ està en rad/s)
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rotacio_ += drotacio_ * delta_time;
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}
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}
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void Enemic::dibuixar() const {
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if (esta_ && forma_) {
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// Calculate animated scale (includes invulnerability LERP)
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float escala = calcular_escala_actual();
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// brightness_ is already updated in actualitzar()
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Rendering::render_shape(renderer_, forma_, centre_, rotacio_, escala, true, 1.0F, brightness_);
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}
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}
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void Enemic::mou(float delta_time) {
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// Dispatcher: crida el comportament específic segons el tipus
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switch (tipus_) {
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case TipusEnemic::PENTAGON:
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comportament_pentagon(delta_time);
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break;
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case TipusEnemic::QUADRAT:
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comportament_quadrat(delta_time);
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break;
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case TipusEnemic::MOLINILLO:
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comportament_molinillo(delta_time);
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break;
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}
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}
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void Enemic::comportament_pentagon(float delta_time) {
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// Pentagon: zigzag esquivador (frequent direction changes)
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// Similar a comportament original però amb probabilitat més alta
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float velocitat_efectiva = velocitat_ * delta_time;
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// Calcular desplaçament (angle-PI/2 perquè angle=0 apunta amunt)
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float dy = velocitat_efectiva * std::sin(angle_ - Constants::PI / 2.0F);
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float dx = velocitat_efectiva * std::cos(angle_ - Constants::PI / 2.0F);
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float new_y = centre_.y + dy;
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float new_x = centre_.x + dx;
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// Obtenir límits segurs
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float min_x, max_x, min_y, max_y;
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Constants::obtenir_limits_zona_segurs(Defaults::Entities::ENEMY_RADIUS,
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min_x,
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max_x,
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min_y,
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max_y);
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// Zigzag: canvi d'angle més freqüent en tocar límits
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if (new_y >= min_y && new_y <= max_y) {
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centre_.y = new_y;
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} else {
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// Probabilitat més alta de canvi d'angle
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if (static_cast<float>(std::rand()) / RAND_MAX < Defaults::Enemies::Pentagon::CANVI_ANGLE_PROB) {
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float rand_angle = (static_cast<float>(std::rand()) / RAND_MAX) *
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Defaults::Enemies::Pentagon::CANVI_ANGLE_MAX;
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angle_ += (std::rand() % 2 == 0) ? rand_angle : -rand_angle;
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}
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}
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if (new_x >= min_x && new_x <= max_x) {
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centre_.x = new_x;
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} else {
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if (static_cast<float>(std::rand()) / RAND_MAX < Defaults::Enemies::Pentagon::CANVI_ANGLE_PROB) {
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float rand_angle = (static_cast<float>(std::rand()) / RAND_MAX) *
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Defaults::Enemies::Pentagon::CANVI_ANGLE_MAX;
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angle_ += (std::rand() % 2 == 0) ? rand_angle : -rand_angle;
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}
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}
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}
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void Enemic::comportament_quadrat(float delta_time) {
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// Quadrat: perseguidor (tracks player position)
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// Update tracking timer
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tracking_timer_ += delta_time;
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// Periodically update angle toward ship
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if (tracking_timer_ >= Defaults::Enemies::Quadrat::TRACKING_INTERVAL) {
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tracking_timer_ = 0.0F;
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if (ship_position_) {
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// Calculate angle to ship
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float dx = ship_position_->x - centre_.x;
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float dy = ship_position_->y - centre_.y;
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float target_angle = std::atan2(dy, dx) + Constants::PI / 2.0F;
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// Interpolate toward target angle
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float angle_diff = target_angle - angle_;
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// Normalize angle difference to [-π, π]
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while (angle_diff > Constants::PI) angle_diff -= 2.0F * Constants::PI;
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while (angle_diff < -Constants::PI) angle_diff += 2.0F * Constants::PI;
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// Apply tracking strength (uses member variable, defaults to 0.5)
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angle_ += angle_diff * tracking_strength_;
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}
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}
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// Move in current direction
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float velocitat_efectiva = velocitat_ * delta_time;
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float dy = velocitat_efectiva * std::sin(angle_ - Constants::PI / 2.0F);
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float dx = velocitat_efectiva * std::cos(angle_ - Constants::PI / 2.0F);
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float new_y = centre_.y + dy;
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float new_x = centre_.x + dx;
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// Obtenir límits segurs
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float min_x, max_x, min_y, max_y;
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Constants::obtenir_limits_zona_segurs(Defaults::Entities::ENEMY_RADIUS,
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min_x,
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max_x,
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min_y,
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max_y);
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// Bounce on walls (simple reflection)
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if (new_y >= min_y && new_y <= max_y) {
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centre_.y = new_y;
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} else {
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angle_ = -angle_; // Vertical reflection
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}
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if (new_x >= min_x && new_x <= max_x) {
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centre_.x = new_x;
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} else {
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angle_ = Constants::PI - angle_; // Horizontal reflection
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}
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}
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void Enemic::comportament_molinillo(float delta_time) {
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// Molinillo: agressiu (fast, straight lines, proximity spin-up)
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// Check proximity to ship for spin-up effect
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if (ship_position_) {
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float dx = ship_position_->x - centre_.x;
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float dy = ship_position_->y - centre_.y;
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float distance = std::sqrt(dx * dx + dy * dy);
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if (distance < Defaults::Enemies::Molinillo::PROXIMITY_DISTANCE) {
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// Temporarily boost rotation speed when near ship
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float boost = Defaults::Enemies::Molinillo::DROTACIO_PROXIMITY_MULTIPLIER;
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drotacio_ = animacio_.drotacio_base * boost;
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} else {
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// Normal rotation speed
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drotacio_ = animacio_.drotacio_base;
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}
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}
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// Fast straight-line movement
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float velocitat_efectiva = velocitat_ * delta_time;
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float dy = velocitat_efectiva * std::sin(angle_ - Constants::PI / 2.0F);
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float dx = velocitat_efectiva * std::cos(angle_ - Constants::PI / 2.0F);
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float new_y = centre_.y + dy;
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float new_x = centre_.x + dx;
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// Obtenir límits segurs
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float min_x, max_x, min_y, max_y;
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Constants::obtenir_limits_zona_segurs(Defaults::Entities::ENEMY_RADIUS,
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min_x,
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max_x,
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min_y,
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max_y);
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// Rare angle changes on wall hits
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if (new_y >= min_y && new_y <= max_y) {
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centre_.y = new_y;
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} else {
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if (static_cast<float>(std::rand()) / RAND_MAX < Defaults::Enemies::Molinillo::CANVI_ANGLE_PROB) {
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float rand_angle = (static_cast<float>(std::rand()) / RAND_MAX) *
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Defaults::Enemies::Molinillo::CANVI_ANGLE_MAX;
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angle_ += (std::rand() % 2 == 0) ? rand_angle : -rand_angle;
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}
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}
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if (new_x >= min_x && new_x <= max_x) {
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centre_.x = new_x;
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} else {
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if (static_cast<float>(std::rand()) / RAND_MAX < Defaults::Enemies::Molinillo::CANVI_ANGLE_PROB) {
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float rand_angle = (static_cast<float>(std::rand()) / RAND_MAX) *
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Defaults::Enemies::Molinillo::CANVI_ANGLE_MAX;
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angle_ += (std::rand() % 2 == 0) ? rand_angle : -rand_angle;
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}
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}
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}
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void Enemic::actualitzar_animacio(float delta_time) {
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actualitzar_palpitacio(delta_time);
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actualitzar_rotacio_accelerada(delta_time);
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}
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void Enemic::actualitzar_palpitacio(float delta_time) {
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if (animacio_.palpitacio_activa) {
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// Advance phase (2π * frequency * dt)
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animacio_.palpitacio_fase += 2.0F * Constants::PI * animacio_.palpitacio_frequencia * delta_time;
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// Decrement timer
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animacio_.palpitacio_temps_restant -= delta_time;
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// Deactivate when timer expires
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if (animacio_.palpitacio_temps_restant <= 0.0F) {
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animacio_.palpitacio_activa = false;
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}
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} else {
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// Random trigger (probability per second)
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float rand_val = static_cast<float>(std::rand()) / RAND_MAX;
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float trigger_prob = Defaults::Enemies::Animation::PALPITACIO_TRIGGER_PROB * delta_time;
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if (rand_val < trigger_prob) {
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// Activate palpitation
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animacio_.palpitacio_activa = true;
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animacio_.palpitacio_fase = 0.0F;
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// Randomize parameters
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float freq_range = Defaults::Enemies::Animation::PALPITACIO_FREQ_MAX -
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Defaults::Enemies::Animation::PALPITACIO_FREQ_MIN;
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animacio_.palpitacio_frequencia = Defaults::Enemies::Animation::PALPITACIO_FREQ_MIN +
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(static_cast<float>(std::rand()) / RAND_MAX) * freq_range;
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float amp_range = Defaults::Enemies::Animation::PALPITACIO_AMPLITUD_MAX -
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Defaults::Enemies::Animation::PALPITACIO_AMPLITUD_MIN;
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animacio_.palpitacio_amplitud = Defaults::Enemies::Animation::PALPITACIO_AMPLITUD_MIN +
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(static_cast<float>(std::rand()) / RAND_MAX) * amp_range;
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float dur_range = Defaults::Enemies::Animation::PALPITACIO_DURACIO_MAX -
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Defaults::Enemies::Animation::PALPITACIO_DURACIO_MIN;
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animacio_.palpitacio_temps_restant = Defaults::Enemies::Animation::PALPITACIO_DURACIO_MIN +
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(static_cast<float>(std::rand()) / RAND_MAX) * dur_range;
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}
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}
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}
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void Enemic::actualitzar_rotacio_accelerada(float delta_time) {
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if (animacio_.drotacio_t < 1.0F) {
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// Transitioning to new target
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animacio_.drotacio_t += delta_time / animacio_.drotacio_duracio;
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if (animacio_.drotacio_t >= 1.0F) {
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animacio_.drotacio_t = 1.0F;
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animacio_.drotacio_base = animacio_.drotacio_objetivo; // Reached target
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drotacio_ = animacio_.drotacio_base;
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} else {
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// Smoothstep interpolation: t² * (3 - 2t)
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float t = animacio_.drotacio_t;
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float smooth_t = t * t * (3.0F - 2.0F * t);
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// Interpolate between base and target
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float initial = animacio_.drotacio_base;
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float target = animacio_.drotacio_objetivo;
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drotacio_ = initial + (target - initial) * smooth_t;
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}
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} else {
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// Random trigger for new acceleration
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float rand_val = static_cast<float>(std::rand()) / RAND_MAX;
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float trigger_prob = Defaults::Enemies::Animation::ROTACIO_ACCEL_TRIGGER_PROB * delta_time;
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if (rand_val < trigger_prob) {
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// Start new transition
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animacio_.drotacio_t = 0.0F;
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// Randomize target speed (multiplier * base)
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float mult_range = Defaults::Enemies::Animation::ROTACIO_ACCEL_MULTIPLIER_MAX -
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Defaults::Enemies::Animation::ROTACIO_ACCEL_MULTIPLIER_MIN;
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float multiplier = Defaults::Enemies::Animation::ROTACIO_ACCEL_MULTIPLIER_MIN +
|
|
(static_cast<float>(std::rand()) / RAND_MAX) * mult_range;
|
|
|
|
animacio_.drotacio_objetivo = animacio_.drotacio_base * multiplier;
|
|
|
|
// Randomize duration
|
|
float dur_range = Defaults::Enemies::Animation::ROTACIO_ACCEL_DURACIO_MAX -
|
|
Defaults::Enemies::Animation::ROTACIO_ACCEL_DURACIO_MIN;
|
|
animacio_.drotacio_duracio = Defaults::Enemies::Animation::ROTACIO_ACCEL_DURACIO_MIN +
|
|
(static_cast<float>(std::rand()) / RAND_MAX) * dur_range;
|
|
}
|
|
}
|
|
}
|
|
|
|
float Enemic::calcular_escala_actual() const {
|
|
float escala = 1.0F;
|
|
|
|
// [NEW] Invulnerability LERP prioritza sobre palpitació
|
|
if (timer_invulnerabilitat_ > 0.0F) {
|
|
// Calculate t: 0.0 at spawn → 1.0 at end
|
|
float t_inv = timer_invulnerabilitat_ / Defaults::Enemies::Spawn::INVULNERABILITY_DURATION;
|
|
float t = 1.0F - t_inv; // 0.0 → 1.0
|
|
|
|
// Apply smoothstep: t² * (3 - 2t)
|
|
float smooth_t = t * t * (3.0F - 2.0F * t);
|
|
|
|
// LERP scale from 0.0 to 1.0
|
|
constexpr float START = Defaults::Enemies::Spawn::INVULNERABILITY_SCALE_START;
|
|
constexpr float END = Defaults::Enemies::Spawn::INVULNERABILITY_SCALE_END;
|
|
escala = START + (END - START) * smooth_t;
|
|
} else if (animacio_.palpitacio_activa) {
|
|
// [EXISTING] Palpitació només quan no invulnerable
|
|
escala += animacio_.palpitacio_amplitud * std::sin(animacio_.palpitacio_fase);
|
|
}
|
|
|
|
return escala;
|
|
}
|
|
|
|
// [NEW] Stage system API implementations
|
|
|
|
float Enemic::get_base_velocity() const {
|
|
switch (tipus_) {
|
|
case TipusEnemic::PENTAGON:
|
|
return Defaults::Enemies::Pentagon::VELOCITAT;
|
|
case TipusEnemic::QUADRAT:
|
|
return Defaults::Enemies::Quadrat::VELOCITAT;
|
|
case TipusEnemic::MOLINILLO:
|
|
return Defaults::Enemies::Molinillo::VELOCITAT;
|
|
}
|
|
return 0.0F;
|
|
}
|
|
|
|
float Enemic::get_base_rotation() const {
|
|
// Return the base rotation speed (drotacio_base if available, otherwise current drotacio_)
|
|
return animacio_.drotacio_base != 0.0F ? animacio_.drotacio_base : drotacio_;
|
|
}
|
|
|
|
void Enemic::set_tracking_strength(float strength) {
|
|
// Only applies to QUADRAT type
|
|
if (tipus_ == TipusEnemic::QUADRAT) {
|
|
tracking_strength_ = strength;
|
|
}
|
|
}
|
|
|
|
// [NEW] Safe spawn helper - checks if position is away from ship
|
|
bool Enemic::intent_spawn_safe(const Punt& ship_pos, float& out_x, float& out_y) {
|
|
// Generate random position within safe bounds
|
|
float min_x, max_x, min_y, max_y;
|
|
Constants::obtenir_limits_zona_segurs(Defaults::Entities::ENEMY_RADIUS,
|
|
min_x,
|
|
max_x,
|
|
min_y,
|
|
max_y);
|
|
|
|
int range_x = static_cast<int>(max_x - min_x);
|
|
int range_y = static_cast<int>(max_y - min_y);
|
|
|
|
out_x = static_cast<float>((std::rand() % range_x) + static_cast<int>(min_x));
|
|
out_y = static_cast<float>((std::rand() % range_y) + static_cast<int>(min_y));
|
|
|
|
// Check Euclidean distance to ship
|
|
float dx = out_x - ship_pos.x;
|
|
float dy = out_y - ship_pos.y;
|
|
float distancia = std::sqrt(dx * dx + dy * dy);
|
|
|
|
// Return true if position is safe (>= 36px from ship)
|
|
return distancia >= Defaults::Enemies::Spawn::SAFETY_DISTANCE;
|
|
}
|