121 lines
3.1 KiB
C++
121 lines
3.1 KiB
C++
#include "PacMan.hpp"
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#include <cmath>
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namespace pacman {
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PacMan::PacMan()
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: pos(Board::initialPacManPosition()) {}
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GridPosition PacMan::currentSprite() const {
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return eaten ? pacManAnimation.deathAnimationFrame() : pacManAnimation.animationFrame(direction);
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}
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Position PacMan::position() const {
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return pos;
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}
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GridPosition PacMan::positionInGrid() const {
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return positionToGridPosition(pos);
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}
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void PacMan::eat() {
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if (eaten)
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return;
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eaten = true;
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direction = Direction::NONE;
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}
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void PacMan::reset() {
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eaten = false;
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direction = Direction::NONE;
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pos = pacman::Board::initialPacManPosition();
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}
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void PacMan::update(std::chrono::milliseconds time_delta, Direction input_direction) {
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if (eaten) {
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updateAnimationPosition(time_delta, false);
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return;
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}
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if (input_direction != Direction::NONE)
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desired_direction = input_direction;
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const auto old = pos;
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updateMazePosition(time_delta);
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const bool paused = pos == old;
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updateAnimationPosition(time_delta, paused);
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}
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void PacMan::updateAnimationPosition(std::chrono::milliseconds time_delta, bool paused) {
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if (paused) {
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pacManAnimation.pause();
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} else {
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pacManAnimation.updateAnimationPosition(time_delta, eaten);
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}
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}
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void PacMan::updateMazePosition(std::chrono::milliseconds time_delta) {
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// Handle teleport
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const size_t right = COLUMNS - 1;
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const size_t left = 0;
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if (std::size_t(pos.x) == right && direction == Direction::RIGHT) {
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pos.x = left;
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return;
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} else if (std::size_t(pos.x) == left && direction == Direction::LEFT) {
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pos.x = right;
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return;
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}
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const double position_delta = 0.004 * time_delta.count();
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const auto pacman_size = 1;
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auto moveToPosition = [&](Position point, Direction move_direction) {
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switch (move_direction) {
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case Direction::LEFT:
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return GridPosition{ std::size_t(point.x - position_delta), std::size_t(point.y) };
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case Direction::RIGHT:
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return GridPosition{ std::size_t(point.x + pacman_size), std::size_t(point.y) };
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case Direction::UP:
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return GridPosition{ std::size_t(point.x), std::size_t(point.y - position_delta) };
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case Direction::DOWN:
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return GridPosition{ std::size_t(point.x), std::size_t(point.y + pacman_size) };
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case Direction::NONE:
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default:
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return positionToGridPosition(point);
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}
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};
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auto canGo = [&](Direction move_direction) {
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return pacman::Board::isWalkableForPacMan(moveToPosition(pos, move_direction));
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};
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if (canGo(desired_direction)) {
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direction = desired_direction;
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}
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if (canGo(direction)) {
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switch (direction) {
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case Direction::NONE:
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break;
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case Direction::LEFT:
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pos.x -= position_delta;
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pos.y = std::floor(pos.y);
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break;
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case Direction::RIGHT:
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pos.x += position_delta;
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pos.y = std::floor(pos.y);
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break;
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case Direction::UP:
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pos.x = std::floor(pos.x);
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pos.y -= position_delta;
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break;
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case Direction::DOWN:
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pos.x = std::floor(pos.x);
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pos.y += position_delta;
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break;
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}
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}
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}
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} // namespace pacman
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