147 lines
4.3 KiB
C++
147 lines
4.3 KiB
C++
// IWYU pragma: no_include <bits/std_abs.h>
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#include "path_sprite.h"
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#include <cmath> // Para abs
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#include <functional> // Para function
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#include <utility> // Para move
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// Devuelve un vector con los puntos que conforman la ruta
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auto createPath(float start, float end, PathType type, float fixed_pos, int steps, const std::function<double(double)> &easing_function) -> std::vector<SDL_FPoint> {
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std::vector<SDL_FPoint> v;
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v.reserve(steps);
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for (int i = 0; i < steps; ++i) {
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double t = static_cast<double>(i) / (steps - 1);
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double value = start + (end - start) * easing_function(t);
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if ((start > 0 && end < 0) || (start < 0 && end > 0)) {
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value = start + (end > 0 ? 1 : -1) * std::abs(end - start) * easing_function(t);
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}
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switch (type) {
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case PathType::HORIZONTAL:
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v.emplace_back(SDL_FPoint{static_cast<float>(value), fixed_pos});
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break;
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case PathType::VERTICAL:
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v.emplace_back(SDL_FPoint{fixed_pos, static_cast<float>(value)});
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break;
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default:
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break;
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}
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}
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return v;
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}
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// Actualiza la posición y comprueba si ha llegado a su destino
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void PathSprite::update() {
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if (enabled_ && !has_finished_) {
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moveThroughCurrentPath();
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goToNextPathOrDie();
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}
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}
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// Muestra el sprite por pantalla
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void PathSprite::render() {
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if (enabled_) {
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Sprite::render();
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}
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}
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// Añade un recorrido
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void PathSprite::addPath(Path path, bool centered) {
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PathCentered path_centered = PathCentered::NONE;
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if (centered) {
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path_centered = (path.spots.back().x == path.spots.front().x) ? PathCentered::ON_X : PathCentered::ON_Y;
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}
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switch (path_centered) {
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case PathCentered::ON_X: {
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const int X = path.spots.back().x - pos_.w / 2;
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for (auto &spot : path.spots) {
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spot.x = X;
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}
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paths_.emplace_back(path);
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break;
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}
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case PathCentered::ON_Y: {
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const int Y = path.spots.back().y - pos_.h / 2;
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for (auto &spot : path.spots) {
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spot.y = Y;
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}
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paths_.emplace_back(path);
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break;
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}
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default:
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paths_.emplace_back(path);
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break;
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}
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}
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// Añade un recorrido
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void PathSprite::addPath(int start, int end, PathType type, int fixed_pos, int steps, const std::function<double(double)> &easing_function, int waiting_counter) {
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paths_.emplace_back(createPath(start, end, type, fixed_pos, steps, easing_function), waiting_counter);
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}
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// Añade un recorrido
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void PathSprite::addPath(std::vector<SDL_FPoint> spots, int waiting_counter) {
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paths_.emplace_back(std::move(spots), waiting_counter);
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}
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// Habilita el objeto
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void PathSprite::enable() {
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if (paths_.empty() || enabled_) {
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return;
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}
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enabled_ = true;
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// Establece la posición
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auto &path = paths_.at(current_path_);
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const auto &p = path.spots.at(path.counter);
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setPosition(p);
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}
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// Coloca el sprite en los diferentes puntos del recorrido
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void PathSprite::moveThroughCurrentPath() {
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auto &path = paths_.at(current_path_);
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// Establece la posición
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const auto &p = path.spots.at(path.counter);
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setPosition(p);
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// Comprobar si ha terminado el recorrido
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if (!path.on_destination) {
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++path.counter;
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if (path.counter >= static_cast<int>(path.spots.size())) {
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path.on_destination = true;
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path.counter = static_cast<int>(path.spots.size()) - 1;
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}
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}
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// Comprobar si ha terminado la espera
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if (path.on_destination) {
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if (path.waiting_counter == 0) {
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path.finished = true;
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} else {
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--path.waiting_counter;
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}
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}
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}
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// Cambia de recorrido o finaliza
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void PathSprite::goToNextPathOrDie() {
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// Comprueba si ha terminado el recorrdo actual
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if (paths_.at(current_path_).finished) {
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++current_path_;
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}
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// Comprueba si quedan mas recorridos
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if (current_path_ >= static_cast<int>(paths_.size())) {
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has_finished_ = true;
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current_path_ = 0;
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}
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}
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// Indica si ha terminado todos los recorridos
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auto PathSprite::hasFinished() const -> bool { return has_finished_; } |