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https://github.com/RGBCube/serenity
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Snake: Try to only repaint the parts that actually changed between ticks.
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parent
2d736d5591
commit
79573ce7e6
2 changed files with 43 additions and 15 deletions
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@ -7,6 +7,7 @@
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SnakeGame::SnakeGame(GWidget* parent)
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: GWidget(parent)
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{
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set_font(Font::default_bold_font());
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m_fruit_bitmap = GraphicsBitmap::load_from_file("/res/icons/snake/paprika.png");
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srand(time(nullptr));
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reset();
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@ -22,10 +23,12 @@ void SnakeGame::reset()
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m_tail.clear_with_capacity();
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m_length = 2;
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m_score = 0;
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m_score_text = "Score: 0";
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m_velocity_queue.clear();
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stop_timer();
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start_timer(120);
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spawn_fruit();
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update();
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}
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bool SnakeGame::is_available(const Coordinate& coord)
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@ -53,16 +56,28 @@ void SnakeGame::spawn_fruit()
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m_fruit = coord;
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}
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Rect SnakeGame::score_rect() const
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{
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int score_width = font().width(m_score_text);
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return { width() - score_width - 2, height() - font().glyph_height() - 2, score_width, font().glyph_height() };
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}
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void SnakeGame::timer_event(CTimerEvent&)
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{
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Vector<Coordinate> dirty_cells;
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m_tail.prepend(m_head);
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if (m_tail.size() > m_length)
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if (m_tail.size() > m_length) {
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dirty_cells.append(m_tail.last());
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m_tail.take_last();
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}
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if (!m_velocity_queue.is_empty())
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m_velocity = m_velocity_queue.dequeue();
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dirty_cells.append(m_head);
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m_head.row += m_velocity.vertical;
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m_head.column += m_velocity.horizontal;
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@ -77,6 +92,8 @@ void SnakeGame::timer_event(CTimerEvent&)
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if (m_head.column < 0)
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m_head.column = m_columns - 1;
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dirty_cells.append(m_head);
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for (int i = 0; i < m_tail.size(); ++i) {
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if (m_head == m_tail[i]) {
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game_over();
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@ -87,9 +104,16 @@ void SnakeGame::timer_event(CTimerEvent&)
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if (m_head == m_fruit) {
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++m_length;
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++m_score;
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m_score_text = String::format("Score: %u", m_score);
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update(score_rect());
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dirty_cells.append(m_fruit);
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spawn_fruit();
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dirty_cells.append(m_fruit);
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}
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for (auto& coord : dirty_cells) {
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update(cell_rect(coord));
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}
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update();
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}
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void SnakeGame::keydown_event(GKeyEvent& event)
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@ -124,30 +148,31 @@ void SnakeGame::keydown_event(GKeyEvent& event)
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}
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}
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Rect SnakeGame::cell_rect(const Coordinate& coord) const
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{
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auto game_rect = rect();
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auto cell_size = Size(game_rect.width() / m_columns, game_rect.height() / m_rows);
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return {
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coord.column * cell_size.width(),
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coord.row * cell_size.height(),
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cell_size.width(),
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cell_size.height()
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};
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}
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void SnakeGame::paint_event(GPaintEvent& event)
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{
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GPainter painter(*this);
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painter.add_clip_rect(event.rect());
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painter.fill_rect(event.rect(), Color::Black);
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auto game_rect = rect();
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auto cell_size = Size(game_rect.width() / m_columns, game_rect.height() / m_rows);
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auto cell_rect = [&] (const Coordinate& coord) -> Rect {
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return {
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coord.column * cell_size.width(),
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coord.row * cell_size.height(),
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cell_size.width(),
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cell_size.height()
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};
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};
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painter.fill_rect(cell_rect(m_head), Color::Yellow);
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for (auto& coord : m_tail)
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painter.fill_rect(cell_rect(coord), Color::from_rgb(0xaaaa00));
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painter.draw_scaled_bitmap(cell_rect(m_fruit), *m_fruit_bitmap, m_fruit_bitmap->rect());
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painter.draw_text(rect(), String::format("Score: %u", m_score), TextAlignment::TopLeft, Color::White);
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painter.draw_text(score_rect(), m_score_text, TextAlignment::TopLeft, Color::White);
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}
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void SnakeGame::game_over()
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