orni-attack/source/game/entities/ship.cpp

// ship.cpp - Implementació de la nave del player
// © 1999 Visente i Sergi (versión Pascal)
// © 2025 Port a C++20 con SDL3

#include "game/entities/ship.hpp"

#include <SDL3/SDL.h>

#include <algorithm>
#include <cmath>
#include <cstdint>
#include <iostream>

#include "core/defaults.hpp"
#include "core/entities/entity.hpp"
#include "core/graphics/shape_loader.hpp"
#include "core/input/input.hpp"
#include "core/input/input_types.hpp"
#include "core/rendering/shape_renderer.hpp"
#include "core/types.hpp"
#include "game/constants.hpp"

Ship::Ship(SDL_Renderer* renderer, const char* shape_file)
    : Entity(renderer),
      velocity_(0.0F),
      is_hit_(false),
      invulnerable_timer_(0.0F) {
    // [NUEVO] Brightness específic per naves
    brightness_ = Defaults::Brightness::NAU;

    // [NUEVO] Carregar shape compartida desde file
    shape_ = Graphics::ShapeLoader::load(shape_file);

    if (!shape_ || !shape_->isValid()) {
        std::cerr << "[Ship] Error: no s'ha pogut load " << shape_file << '\n';
    }
}

void Ship::init(const Vec2* spawn_point, bool activar_invulnerabilitat) {
    // Inicialización de la ship (triangle)
    // Basat en el codi Pascal original: lines 380-384
    // Copiat de joc_asteroides.cpp línies 30-44

    // [NUEVO] Ya no necesario configure points polars - la geometria es carrega del
    // file Solo inicialitzem l'state de la instància

    // Use custom spawn point if provided, otherwise use center
    if (spawn_point != nullptr) {
        center_.x = spawn_point->x;
        center_.y = spawn_point->y;
    } else {
        // Default: center of play area
        float centre_x;
        float centre_y;
        Constants::obtenir_centre_zona(centre_x, centre_y);
        center_.x = static_cast<int>(centre_x);
        center_.y = static_cast<int>(centre_y);
    }

    // Estat inicial
    angle_ = 0.0F;
    velocity_ = 0.0F;

    // Activar invulnerabilidad solo si es respawn
    if (activar_invulnerabilitat) {
        invulnerable_timer_ = Defaults::Ship::INVULNERABILITY_DURATION;
    } else {
        invulnerable_timer_ = 0.0F;
    }

    is_hit_ = false;
}

void Ship::processInput(float delta_time, uint8_t player_id) {
    // Processar input continu (como teclapuls() del Pascal original)
    // Basat en joc_asteroides.cpp línies 66-85
    // Solo processa input si la ship está viva
    if (is_hit_) {
        return;
    }

    auto* input = Input::get();

    // Processar input segons el player
    if (player_id == 0) {
        // Jugador 1
        if (input->checkActionPlayer1(InputAction::RIGHT, Input::ALLOW_REPEAT)) {
            angle_ += Defaults::Physics::ROTATION_SPEED * delta_time;
        }

        if (input->checkActionPlayer1(InputAction::LEFT, Input::ALLOW_REPEAT)) {
            angle_ -= Defaults::Physics::ROTATION_SPEED * delta_time;
        }

        if (input->checkActionPlayer1(InputAction::THRUST, Input::ALLOW_REPEAT)) {
            if (velocity_ < Defaults::Physics::MAX_VELOCITY) {
                velocity_ += Defaults::Physics::ACCELERATION * delta_time;
                velocity_ = std::min(velocity_, Defaults::Physics::MAX_VELOCITY);
            }
        }
    } else {
        // Jugador 2
        if (input->checkActionPlayer2(InputAction::RIGHT, Input::ALLOW_REPEAT)) {
            angle_ += Defaults::Physics::ROTATION_SPEED * delta_time;
        }

        if (input->checkActionPlayer2(InputAction::LEFT, Input::ALLOW_REPEAT)) {
            angle_ -= Defaults::Physics::ROTATION_SPEED * delta_time;
        }

        if (input->checkActionPlayer2(InputAction::THRUST, Input::ALLOW_REPEAT)) {
            if (velocity_ < Defaults::Physics::MAX_VELOCITY) {
                velocity_ += Defaults::Physics::ACCELERATION * delta_time;
                velocity_ = std::min(velocity_, Defaults::Physics::MAX_VELOCITY);
            }
        }
    }
}

void Ship::update(float delta_time) {
    // Solo update si la ship está viva
    if (is_hit_) {
        return;
    }

    // Decrementar timer de invulnerabilidad
    if (invulnerable_timer_ > 0.0F) {
        invulnerable_timer_ -= delta_time;
        invulnerable_timer_ = std::max(invulnerable_timer_, 0.0F);
    }

    // Aplicar física (movement + fricció)
    applyPhysics(delta_time);
}

void Ship::draw() const {
    // Solo draw si la ship está viva
    if (is_hit_) {
        return;
    }

    // Si invulnerable, parpadear (toggle on/off)
    if (isInvulnerable()) {
        // Calcular ciclo de parpadeo
        float blink_cycle = Defaults::Ship::BLINK_VISIBLE_TIME +
            Defaults::Ship::BLINK_INVISIBLE_TIME;
        float time_in_cycle = std::fmod(invulnerable_timer_, blink_cycle);

        // Si estamos en fase invisible, no dibujar
        if (time_in_cycle < Defaults::Ship::BLINK_INVISIBLE_TIME) {
            return;  // No dibujar durante fase invisible
        }
    }

    if (!shape_) {
        return;
    }

    // Escalar velocity per l'efecte visual (200 px/s → ~6 px de efecte)
    // El codi Pascal original sumava velocity (0-6) al radi per donar
    // sensació de "empenta". Ara velocity está en px/s (0-200).
    // Basat en joc_asteroides.cpp línies 127-134
    //
    // [NUEVO] Convertir suma de velocitat_visual a scale multiplicativa
    // Radio base del ship = 12 px
    // velocitat_visual = 0-6 → r = 12-18 → scale = 1.0-1.5
    float velocitat_visual = velocity_ / 33.33F;
    float scale = 1.0F + (velocitat_visual / 12.0F);

    Rendering::render_shape(renderer_, shape_, center_, angle_, scale, 1.0F, brightness_);
}

void Ship::applyPhysics(float delta_time) {
    // Aplicar física de movement
    // Basat en joc_asteroides.cpp línies 87-113

    // Calcular nueva posición basada en velocity i angle
    // S'usa (angle - PI/2) perquè angle=0 apunta sin amunt, no hacia la derecha
    // velocity_ está en px/s, así que multipliquem per delta_time
    float dy =
        ((velocity_ * delta_time) * std::sin(angle_ - (Constants::PI / 2.0F))) +
        center_.y;
    float dx =
        ((velocity_ * delta_time) * std::cos(angle_ - (Constants::PI / 2.0F))) +
        center_.x;

    // Boundary checking con radi de la ship
    // CORRECCIÓ: Usar límits segurs i inequalitats inclusives
    float min_x;
    float max_x;
    float min_y;
    float max_y;
    Constants::obtenir_limits_zona_segurs(Defaults::Entities::SHIP_RADIUS,
        min_x,
        max_x,
        min_y,
        max_y);

    // Inequalitats inclusives (>= i <=)
    if (dy >= min_y && dy <= max_y) {
        center_.y = dy;
    }

    if (dx >= min_x && dx <= max_x) {
        center_.x = dx;
    }

    // Fricció - desacceleració gradual (time-based)
    if (velocity_ > 0.1F) {
        velocity_ -= Defaults::Physics::FRICTION * delta_time;
        velocity_ = std::max(velocity_, 0.0F);
    }
}