463 lines
19 KiB
C++
463 lines
19 KiB
C++
// debris_manager.cpp - Implementació del gestor de fragments
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// © 2026 JailDesigner
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#include "debris_manager.hpp"
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#include <algorithm>
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#include <cmath>
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#include <cstdlib>
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#include <iostream>
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#include "core/audio/audio.hpp"
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#include "core/defaults.hpp"
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#include "core/rendering/line_renderer.hpp"
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namespace Effects {
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// Helper: transformar point con rotación, scale i traslación
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// (Copiat de shape_renderer.cpp:12-34)
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static auto transformPoint(const Vec2& point, const Vec2& shape_centre, const Vec2& position, float angle, float scale) -> Vec2 {
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// 1. Centrar el point respecte al centro de la shape
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float centered_x = point.x - shape_centre.x;
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float centered_y = point.y - shape_centre.y;
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// 2. Aplicar scale al point centrat
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float scaled_x = centered_x * scale;
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float scaled_y = centered_y * scale;
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// 3. Aplicar rotación
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float cos_a = std::cos(angle);
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float sin_a = std::sin(angle);
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float rotated_x = (scaled_x * cos_a) - (scaled_y * sin_a);
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float rotated_y = (scaled_x * sin_a) + (scaled_y * cos_a);
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// 4. Aplicar traslación a posición mundial
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return {.x = rotated_x + position.x, .y = rotated_y + position.y};
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}
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DebrisManager::DebrisManager(Rendering::Renderer* renderer)
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: renderer_(renderer) {
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// Inicialitzar todos los debris como inactius
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for (auto& debris : debris_pool_) {
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debris.active = false;
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}
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}
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void DebrisManager::explode(const std::shared_ptr<Graphics::Shape>& shape,
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const Vec2& centro,
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float angle,
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float scale,
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float velocitat_base,
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float brightness,
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const Vec2& velocitat_objecte,
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float velocitat_angular,
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float factor_herencia_visual,
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const std::string& sound,
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SDL_Color color,
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float lifetime,
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float friction,
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int segment_multiplier,
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const Vec2& bullet_impulse_velocity,
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float piece_scale) {
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if (!shape || !shape->isValid()) {
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return;
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}
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// Reproducir sonido de explosión. Cadena buida = explosió silenciosa
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// (p. ex. el logo dins el cicle d'atracció).
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if (!sound.empty()) {
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Audio::get()->playSound(sound, Audio::Group::GAME);
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}
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// Notificar als subscriptors (border, playfield, etc.).
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if (explosion_callback_) {
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explosion_callback_(centro);
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}
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const Vec2& shape_centre = shape->getCenter();
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// Multiplier: cada segment s'emet N vegades amb direccions aleatòries
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// distintes (la variació ±15° de computeExplosionDirection ho garanteix).
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const int COPIES = std::max(1, segment_multiplier);
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for (int copy = 0; copy < COPIES; copy++) {
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for (const auto& primitive : shape->getPrimitives()) {
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for (const auto& [local_p1, local_p2] : extractSegments(primitive)) {
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// Transformar points locals → coordenades mundials
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Vec2 world_p1 = transformPoint(local_p1, shape_centre, centro, angle, scale);
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Vec2 world_p2 = transformPoint(local_p2, shape_centre, centro, angle, scale);
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// Si el pool es ple, no té sentit continuar amb la resta de segments
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if (!spawnDebris(world_p1, world_p2, centro, velocitat_base, brightness, velocitat_objecte, velocitat_angular, factor_herencia_visual, color, lifetime, friction, bullet_impulse_velocity, piece_scale)) {
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return;
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}
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}
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}
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}
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}
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auto DebrisManager::extractSegments(const Graphics::ShapePrimitive& primitive)
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-> std::vector<std::pair<Vec2, Vec2>> {
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std::vector<std::pair<Vec2, Vec2>> segments;
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if (primitive.type == Graphics::PrimitiveType::POLYLINE) {
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// Polyline: extreure segments consecutius
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for (size_t i = 0; i + 1 < primitive.points.size(); i++) {
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segments.emplace_back(primitive.points[i], primitive.points[i + 1]);
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}
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return segments;
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}
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// PrimitiveType::LINE: un únic segment (si té els 2 punts)
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if (primitive.points.size() >= 2) {
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segments.emplace_back(primitive.points[0], primitive.points[1]);
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}
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return segments;
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}
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auto DebrisManager::spawnDebris(const Vec2& world_p1_in, const Vec2& world_p2_in, const Vec2& centro, float velocitat_base, float brightness, const Vec2& velocitat_objecte, float velocitat_angular, float factor_herencia_visual, SDL_Color color, float lifetime, float friction, const Vec2& bullet_impulse_velocity, float piece_scale) -> bool {
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Debris* debris = findFreeSlot();
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if (debris == nullptr) {
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std::cerr << "[DebrisManager] Warning: no debris slots disponibles\n";
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return false;
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}
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// Escala el segment al voltant del seu punt mitjà segons piece_scale
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// (1.0 = original; 0.3 = "esquerda petita"). La resta del càlcul (angle,
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// half_length, p1/p2) en deriva naturalment.
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const Vec2 MID = {.x = (world_p1_in.x + world_p2_in.x) / 2.0F,
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.y = (world_p1_in.y + world_p2_in.y) / 2.0F};
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const Vec2 WORLD_P1 = {.x = MID.x + ((world_p1_in.x - MID.x) * piece_scale),
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.y = MID.y + ((world_p1_in.y - MID.y) * piece_scale)};
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const Vec2 WORLD_P2 = {.x = MID.x + ((world_p2_in.x - MID.x) * piece_scale),
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.y = MID.y + ((world_p2_in.y - MID.y) * piece_scale)};
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// Geometria autoritaritzada: centro + original_angle + original_half_length.
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// p1/p2 es reconstrueixen cada frame en update() des d'aquestes dades.
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const float DX = WORLD_P2.x - WORLD_P1.x;
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const float DY = WORLD_P2.y - WORLD_P1.y;
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debris->centro = {.x = (WORLD_P1.x + WORLD_P2.x) / 2.0F,
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.y = (WORLD_P1.y + WORLD_P2.y) / 2.0F};
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debris->original_angle = std::atan2(DY, DX);
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debris->original_half_length = std::sqrt((DX * DX) + (DY * DY)) / 2.0F;
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debris->p1 = WORLD_P1;
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debris->p2 = WORLD_P2;
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// Direcció radial (desde el centro hacia el segment)
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Vec2 direccio = computeExplosionDirection(WORLD_P1, WORLD_P2, centro);
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// Velocidad inicial (base ± variació aleatòria + velocity heretada de l'objecte +
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// velocitat de la bala escalada per BULLET_IMPULSE_FACTOR).
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float speed =
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velocitat_base +
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(((std::rand() / static_cast<float>(RAND_MAX)) * 2.0F - 1.0F) *
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Defaults::Physics::Debris::VARIACIO_SPEED);
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debris->velocity.x = (direccio.x * speed) + velocitat_objecte.x +
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(bullet_impulse_velocity.x * Defaults::Physics::Debris::BULLET_IMPULSE_FACTOR);
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debris->velocity.y = (direccio.y * speed) + velocitat_objecte.y +
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(bullet_impulse_velocity.y * Defaults::Physics::Debris::BULLET_IMPULSE_FACTOR);
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debris->acceleration = friction;
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// Rotación de trayectoria (con conversió a tangencial si excedeix cap)
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applyAngularVelocity(*debris, direccio, velocitat_angular);
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// Rotación visual (proporcional o aleatòria)
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applyVisualRotation(*debris, velocitat_angular, factor_herencia_visual);
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debris->angle_rotacio = 0.0F;
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// Vida i shrinking — min_lifetime és el temps mínim garantit; després
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// el fragment mor quan |velocity| < MIN_SPEED_TO_DIE.
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debris->elapsed_time = 0.0F;
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debris->min_lifetime = lifetime;
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debris->factor_shrink = Defaults::Physics::Debris::SHRINK_RATE;
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// Visuals heretades
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debris->brightness = brightness;
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debris->color = color;
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debris->active = true;
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return true;
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}
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void DebrisManager::applyAngularVelocity(Debris& debris, const Vec2& direccio, float velocitat_angular) {
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if (std::abs(velocitat_angular) <= 0.01F) {
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debris.velocitat_rot = 0.0F; // Nave: sin curvas
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return;
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}
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// FASE 1: Aplicar herència i variació
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float factor_herencia =
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Defaults::Physics::Debris::INHERITANCE_FACTOR_MIN +
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((std::rand() / static_cast<float>(RAND_MAX)) *
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(Defaults::Physics::Debris::INHERITANCE_FACTOR_MAX -
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Defaults::Physics::Debris::INHERITANCE_FACTOR_MIN));
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float velocitat_ang_heretada = velocitat_angular * factor_herencia;
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float variacio = ((std::rand() / static_cast<float>(RAND_MAX)) * 0.2F) - 0.1F;
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velocitat_ang_heretada *= (1.0F + variacio);
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// FASE 2: Cap a la velocity màxima; l'excés es converteix en tangencial
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constexpr float CAP = Defaults::Physics::Debris::SPEED_ROT_MAX;
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float abs_ang = std::abs(velocitat_ang_heretada);
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float sign_ang = (velocitat_ang_heretada >= 0.0F) ? 1.0F : -1.0F;
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if (abs_ang <= CAP) {
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debris.velocitat_rot = velocitat_ang_heretada;
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return;
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}
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// Excés: converteix l'excés de velocitat angular en velocitat tangencial lineal
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float excess = abs_ang - CAP;
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constexpr float RADIUS = 20.0F; // Radi típic de la shape (enemigos = 20 px)
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float v_tangential = excess * RADIUS;
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// Direcció tangencial: perpendicular a la radial (90° CCW): tangent = (-dy, dx)
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debris.velocity.x += -direccio.y * v_tangential;
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debris.velocity.y += direccio.x * v_tangential;
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// Velocitat angular limitada al cap (preservant el signe)
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debris.velocitat_rot = sign_ang * CAP;
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}
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void DebrisManager::applyVisualRotation(Debris& debris, float velocitat_angular, float factor_herencia_visual) {
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if (factor_herencia_visual > 0.01F && std::abs(velocitat_angular) > 0.01F) {
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// Heredar rotación visual con factor proporcional + ±5% de variació
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debris.velocitat_rot_visual = debris.velocitat_rot * factor_herencia_visual;
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float variacio_visual =
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((std::rand() / static_cast<float>(RAND_MAX)) * 0.1F) - 0.05F;
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debris.velocitat_rot_visual *= (1.0F + variacio_visual);
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return;
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}
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// Rotación visual aleatòria (factor = 0.0 o sin velocidad angular)
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debris.velocitat_rot_visual =
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Defaults::Physics::Debris::ROTATION_MIN +
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((std::rand() / static_cast<float>(RAND_MAX)) *
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(Defaults::Physics::Debris::ROTATION_MAX -
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Defaults::Physics::Debris::ROTATION_MIN));
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// 50% probabilitat de rotación en sentit contrari
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if (std::rand() % 2 == 0) {
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debris.velocitat_rot_visual = -debris.velocitat_rot_visual;
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}
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}
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// Rebot del fragment contra els límits del PLAYAREA (mateix patró que
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// PhysicsWorld::resolveBoundsCollisions per a enemics i ships).
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static void bounceOffPlayArea(Vec2& centro, Vec2& velocity) {
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const auto& bounds = Defaults::Zones::PLAYAREA;
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const float MIN_X = bounds.x;
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const float MAX_X = bounds.x + bounds.w;
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const float MIN_Y = bounds.y;
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const float MAX_Y = bounds.y + bounds.h;
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constexpr float REST = Defaults::Physics::Debris::RESTITUTION_BOUNDS;
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if (centro.x < MIN_X) {
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centro.x = MIN_X;
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if (velocity.x < 0.0F) {
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velocity.x = -velocity.x * REST;
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}
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}
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if (centro.x > MAX_X) {
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centro.x = MAX_X;
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if (velocity.x > 0.0F) {
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velocity.x = -velocity.x * REST;
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}
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}
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if (centro.y < MIN_Y) {
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centro.y = MIN_Y;
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if (velocity.y < 0.0F) {
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velocity.y = -velocity.y * REST;
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}
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}
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if (centro.y > MAX_Y) {
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centro.y = MAX_Y;
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if (velocity.y > 0.0F) {
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velocity.y = -velocity.y * REST;
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}
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}
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}
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void DebrisManager::update(float delta_time) {
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for (auto& debris : debris_pool_) {
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if (!debris.active) {
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continue;
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}
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// 1. Actualitzar time de vida
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debris.elapsed_time += delta_time;
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// Política de mort: viu sí o sí durant min_lifetime; després mor
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// quan la velocity cau per sota d'un llindar. Així els fragments
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// ràpids no desapareixen en moviment.
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if (debris.elapsed_time >= debris.min_lifetime) {
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const float SPEED_SQ = (debris.velocity.x * debris.velocity.x) +
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(debris.velocity.y * debris.velocity.y);
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if (SPEED_SQ < Defaults::Physics::Debris::MIN_SPEED_TO_DIE_SQ) {
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debris.active = false;
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continue;
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}
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}
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// 2. Actualitzar velocity (desacceleració)
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// Aplicar fricció en la direcció del movement
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float speed = std::sqrt((debris.velocity.x * debris.velocity.x) +
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(debris.velocity.y * debris.velocity.y));
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if (speed > 1.0F) {
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// Calcular direcció normalitzada
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float dir_x = debris.velocity.x / speed;
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float dir_y = debris.velocity.y / speed;
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// Aplicar aceleración negativa (fricció)
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float nova_speed = speed + (debris.acceleration * delta_time);
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nova_speed = std::max(nova_speed, 0.0F);
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debris.velocity.x = dir_x * nova_speed;
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debris.velocity.y = dir_y * nova_speed;
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} else {
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// Velocidad mucho baixa, aturar
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debris.velocity.x = 0.0F;
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debris.velocity.y = 0.0F;
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}
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// 2b. Rotar vector de velocity (trayectoria curva)
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if (std::abs(debris.velocitat_rot) > 0.01F) {
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// Calcular angle de rotación este frame
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float dangle = debris.velocitat_rot * delta_time;
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// Rotar vector de velocity usant matriu de rotación 2D
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float vel_x_old = debris.velocity.x;
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float vel_y_old = debris.velocity.y;
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float cos_a = std::cos(dangle);
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float sin_a = std::sin(dangle);
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debris.velocity.x = (vel_x_old * cos_a) - (vel_y_old * sin_a);
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debris.velocity.y = (vel_x_old * sin_a) + (vel_y_old * cos_a);
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}
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// 2c. Aplicar fricció angular (desacceleració gradual)
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if (std::abs(debris.velocitat_rot) > 0.01F) {
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float sign = (debris.velocitat_rot > 0) ? 1.0F : -1.0F;
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float reduccion =
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Defaults::Physics::Debris::FRICCIO_ANGULAR * delta_time;
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debris.velocitat_rot -= sign * reduccion;
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// Evitar canvi de signe (no pot passar de CW a CCW)
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if ((debris.velocitat_rot > 0) != (sign > 0)) {
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debris.velocitat_rot = 0.0F;
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}
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}
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// 3. Actualitzar posició del centre (integra velocity).
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debris.centro.x += debris.velocity.x * delta_time;
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debris.centro.y += debris.velocity.y * delta_time;
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// 4. Rebot contra els límits del PLAYAREA.
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bounceOffPlayArea(debris.centro, debris.velocity);
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// 5. Actualitzar rotació visual acumulada.
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debris.angle_rotacio += debris.velocitat_rot_visual * delta_time;
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// 6. Shrink lineal sobre la longitud ORIGINAL (no iteratiu).
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// SHRINK_T va de 0 a 1 al llarg de min_lifetime; després queda
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// a 1 i el shrink_factor manté el valor mínim (1 - factor_shrink).
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const float SHRINK_T = std::min(debris.elapsed_time / debris.min_lifetime, 1.0F);
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const float SHRINK_FACTOR = std::max(0.0F, 1.0F - (debris.factor_shrink * SHRINK_T));
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// 7. Reconstruir p1/p2 des de la geometria autoritaritzada:
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// centro + (cos/sin(original_angle + angle_rotacio)) × original_half_length × shrink_factor
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// No iteratiu — evita la rotació quadràtica i el shrink exponencial.
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const float CURRENT_ANGLE = debris.original_angle + debris.angle_rotacio;
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const float HALF_LEN = debris.original_half_length * SHRINK_FACTOR;
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const float COS_A = std::cos(CURRENT_ANGLE);
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const float SIN_A = std::sin(CURRENT_ANGLE);
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debris.p1.x = debris.centro.x - (HALF_LEN * COS_A);
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debris.p1.y = debris.centro.y - (HALF_LEN * SIN_A);
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debris.p2.x = debris.centro.x + (HALF_LEN * COS_A);
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debris.p2.y = debris.centro.y + (HALF_LEN * SIN_A);
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}
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}
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void DebrisManager::draw() const {
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for (const auto& debris : debris_pool_) {
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if (!debris.active) {
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continue;
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}
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// Dibujar segmento con brightness y color heredados del padre.
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Rendering::linea(renderer_,
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static_cast<int>(debris.p1.x),
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static_cast<int>(debris.p1.y),
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static_cast<int>(debris.p2.x),
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static_cast<int>(debris.p2.y),
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debris.brightness,
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0.0F,
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debris.color);
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}
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}
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auto DebrisManager::findFreeSlot() -> Debris* {
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for (auto& debris : debris_pool_) {
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if (!debris.active) {
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return &debris;
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}
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}
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return nullptr; // Pool ple
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}
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auto DebrisManager::computeExplosionDirection(const Vec2& p1,
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const Vec2& p2,
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const Vec2& centre_objecte) -> Vec2 {
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// 1. Calcular centro del segment
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float centro_seg_x = (p1.x + p2.x) / 2.0F;
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float centro_seg_y = (p1.y + p2.y) / 2.0F;
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// 2. Calcular vector des del centro de l'objecte hacia el centro del segment
|
||
// Això garanteix que la direcció siempre apunte hacia fuera (direcció radial)
|
||
float dx = centro_seg_x - centre_objecte.x;
|
||
float dy = centro_seg_y - centre_objecte.y;
|
||
|
||
// 3. Normalitzar (obtenir vector unitari)
|
||
float length = std::sqrt((dx * dx) + (dy * dy));
|
||
if (length < 0.001F) {
|
||
// Segment al centro (cas extrem mucho improbable), retornar direcció aleatòria
|
||
float angle_rand =
|
||
(std::rand() / static_cast<float>(RAND_MAX)) * 2.0F * Defaults::Math::PI;
|
||
return {.x = std::cos(angle_rand), .y = std::sin(angle_rand)};
|
||
}
|
||
|
||
dx /= length;
|
||
dy /= length;
|
||
|
||
// 4. Añadir variació aleatòria pequeña (±15°) per varietat visual
|
||
float angle_variacio =
|
||
((std::rand() % 30) - 15) * Defaults::Math::PI / 180.0F;
|
||
|
||
float cos_v = std::cos(angle_variacio);
|
||
float sin_v = std::sin(angle_variacio);
|
||
|
||
float final_x = (dx * cos_v) - (dy * sin_v);
|
||
float final_y = (dx * sin_v) + (dy * cos_v);
|
||
|
||
return {.x = final_x, .y = final_y};
|
||
}
|
||
|
||
void DebrisManager::reset() {
|
||
for (auto& debris : debris_pool_) {
|
||
debris.active = false;
|
||
}
|
||
}
|
||
|
||
auto DebrisManager::getActiveCount() const -> int {
|
||
int count = 0;
|
||
for (const auto& debris : debris_pool_) {
|
||
if (debris.active) {
|
||
count++;
|
||
}
|
||
}
|
||
return count;
|
||
}
|
||
|
||
} // namespace Effects
|