Games: Add Pong

Author: https://github.com/bcoles
Commit: https://github.com/SerenityOS/serenity/commit/9d4a0ec50a4
Pull-request: https://github.com/SerenityOS/serenity/pull/4029

Base/res/apps/Pong.af

@@ -0,0 +1,8 @@
+[App]
+Name=Pong
+Executable=/bin/Pong
+Category=Games
+
+[Icons]
+16x16=/res/icons/16x16/app-pong.png
+32x32=/res/icons/32x32/app-pong.png

Games/CMakeLists.txt

@@ -2,5 +2,6 @@ add_subdirectory(2048)
 add_subdirectory(Breakout)
 add_subdirectory(Chess)
 add_subdirectory(Minesweeper)
+add_subdirectory(Pong)
 add_subdirectory(Snake)
 add_subdirectory(Solitaire)

Games/Pong/CMakeLists.txt

@@ -0,0 +1,7 @@
+set(SOURCES
+    main.cpp
+    Game.cpp
+)
+
+serenity_bin(Pong)
+target_link_libraries(Pong LibGUI)

Games/Pong/Game.cpp

@@ -0,0 +1,236 @@
+/*
+ * Copyright (c) 2020, the SerenityOS developers.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "Game.h"
+
+namespace Pong {
+
+Game::Game()
+{
+    set_override_cursor(Gfx::StandardCursor::Hidden);
+    start_timer(16);
+    reset();
+}
+
+Game::~Game()
+{
+}
+
+void Game::reset_paddles()
+{
+    m_player1_paddle.moving_up = false;
+    m_player1_paddle.moving_down = false;
+    m_player1_paddle.rect = { game_width - 12, game_height / 2 - 40, m_player1_paddle.width, m_player1_paddle.height };
+    m_player2_paddle.moving_up = false;
+    m_player2_paddle.moving_down = false;
+    m_player2_paddle.rect = { 4, game_height / 2 - 40, m_player2_paddle.width, m_player2_paddle.height };
+}
+
+void Game::reset()
+{
+    reset_ball(1);
+    reset_paddles();
+}
+
+void Game::timer_event(Core::TimerEvent&)
+{
+    tick();
+}
+
+void Game::paint_event(GUI::PaintEvent& event)
+{
+    GUI::Painter painter(*this);
+    painter.add_clip_rect(event.rect());
+
+    painter.fill_rect(rect(), Color::Black);
+    painter.fill_rect(enclosing_int_rect(m_net.rect()), m_net.color);
+
+    painter.fill_ellipse(enclosing_int_rect(m_ball.rect()), Color::Red);
+
+    painter.fill_rect(enclosing_int_rect(m_player1_paddle.rect), m_player1_paddle.color);
+    painter.fill_rect(enclosing_int_rect(m_player2_paddle.rect), m_player2_paddle.color);
+
+    painter.draw_text(player_1_score_rect(), String::formatted("{}", m_player_1_score), Gfx::TextAlignment::TopLeft, Color::White);
+    painter.draw_text(player_2_score_rect(), String::formatted("{}", m_player_2_score), Gfx::TextAlignment::TopLeft, Color::White);
+}
+
+void Game::keyup_event(GUI::KeyEvent& event)
+{
+    switch (event.key()) {
+    case Key_Up:
+        m_player1_paddle.moving_up = false;
+        break;
+    case Key_Down:
+        m_player1_paddle.moving_down = false;
+        break;
+    default:
+        break;
+    }
+}
+
+void Game::keydown_event(GUI::KeyEvent& event)
+{
+    switch (event.key()) {
+    case Key_Escape:
+        GUI::Application::the()->quit();
+        break;
+    case Key_Up:
+        m_player1_paddle.moving_up = true;
+        break;
+    case Key_Down:
+        m_player1_paddle.moving_down = true;
+        break;
+    default:
+        break;
+    }
+}
+
+void Game::mousemove_event(GUI::MouseEvent& event)
+{
+    float new_paddle_y = event.y() - m_player1_paddle.rect.height() / 2;
+    new_paddle_y = max(0.0f, new_paddle_y);
+    new_paddle_y = min(game_height - m_player1_paddle.rect.height(), new_paddle_y);
+    m_player1_paddle.rect.set_y(new_paddle_y);
+}
+
+void Game::reset_ball(int serve_to_player)
+{
+    int position_y_min = (game_width / 2) - 50;
+    int position_y_max = (game_width / 2) + 50;
+    int position_y = arc4random() % (position_y_max - position_y_min + 1) + position_y_min;
+    int position_x = (game_height / 2);
+    int velocity_y = arc4random() % 3 + 1;
+    int velocity_x = 5 + (5 - velocity_y);
+    if (arc4random() % 2)
+        velocity_y = velocity_y * -1;
+    if (serve_to_player == 2)
+        velocity_x = velocity_x * -1;
+
+    m_ball = {};
+    m_ball.position = { position_x, position_y };
+    m_ball.velocity = { velocity_x, velocity_y };
+}
+
+void Game::game_over(int winner)
+{
+    GUI::MessageBox::show(window(), String::format("Player %d wins!", winner), "Pong", GUI::MessageBox::Type::Warning, GUI::MessageBox::InputType::OK);
+}
+
+void Game::round_over(int winner)
+{
+    stop_timer();
+    if (winner == 1)
+        m_player_1_score++;
+
+    if (winner == 2)
+        m_player_2_score++;
+
+    if (m_player_1_score == m_score_to_win || m_player_2_score == m_score_to_win) {
+        game_over(winner);
+        return;
+    }
+
+    reset_ball(winner);
+    reset_paddles();
+    start_timer(16);
+}
+
+void Game::calculate_move()
+{
+    if ((m_ball.y() + m_ball.radius) < (m_player2_paddle.rect.y() + (m_player2_paddle.rect.height() / 2))) {
+        m_player2_paddle.moving_up = true;
+        m_player2_paddle.moving_down = false;
+        return;
+    }
+    if ((m_ball.y() + m_ball.radius) > (m_player2_paddle.rect.y() + (m_player2_paddle.rect.height() / 2))) {
+        m_player2_paddle.moving_up = false;
+        m_player2_paddle.moving_down = true;
+        return;
+    }
+    m_player2_paddle.moving_up = false;
+    m_player2_paddle.moving_down = false;
+}
+
+void Game::tick()
+{
+    auto new_ball = m_ball;
+    new_ball.position += new_ball.velocity;
+
+    if (new_ball.y() < new_ball.radius || new_ball.y() > game_height - new_ball.radius) {
+        new_ball.position.set_y(m_ball.y());
+        new_ball.velocity.set_y(new_ball.velocity.y() * -1);
+    }
+
+    if (new_ball.x() < new_ball.radius) {
+        round_over(1);
+        return;
+    }
+
+    if (new_ball.x() > (game_width - new_ball.radius)) {
+        round_over(2);
+        return;
+    }
+
+    if (new_ball.rect().intersects(m_player1_paddle.rect)) {
+        new_ball.position.set_x(m_ball.x());
+        new_ball.velocity.set_x(new_ball.velocity.x() * -1);
+
+        float distance_to_middle_of_paddle = new_ball.y() - m_player1_paddle.rect.center().y();
+        float relative_impact_point = distance_to_middle_of_paddle / m_player1_paddle.rect.height();
+        new_ball.velocity.set_y(relative_impact_point * 7);
+    }
+
+    if (new_ball.rect().intersects(m_player2_paddle.rect)) {
+        new_ball.position.set_x(m_ball.x());
+        new_ball.velocity.set_x(new_ball.velocity.x() * -1);
+
+        float distance_to_middle_of_paddle = new_ball.y() - m_player2_paddle.rect.center().y();
+        float relative_impact_point = distance_to_middle_of_paddle / m_player2_paddle.rect.height();
+        new_ball.velocity.set_y(relative_impact_point * 7);
+    }
+
+    if (m_player1_paddle.moving_up) {
+        m_player1_paddle.rect.set_y(max(0.0f, m_player1_paddle.rect.y() - m_player1_paddle.speed));
+    }
+    if (m_player1_paddle.moving_down) {
+        m_player1_paddle.rect.set_y(min(game_height - m_player1_paddle.rect.height(), m_player1_paddle.rect.y() + m_player1_paddle.speed));
+    }
+
+    calculate_move();
+
+    if (m_player2_paddle.moving_up) {
+        m_player2_paddle.rect.set_y(max(0.0f, m_player2_paddle.rect.y() - m_player2_paddle.speed));
+    }
+    if (m_player2_paddle.moving_down) {
+        m_player2_paddle.rect.set_y(min(game_height - m_player2_paddle.rect.height(), m_player2_paddle.rect.y() + m_player2_paddle.speed));
+    }
+
+    m_ball = new_ball;
+
+    update();
+}
+
+}

Games/Pong/Game.h

@@ -0,0 +1,120 @@
+/*
+ * Copyright (c) 2020, the SerenityOS developers.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include <LibCore/ConfigFile.h>
+#include <LibGUI/Application.h>
+#include <LibGUI/MessageBox.h>
+#include <LibGUI/Painter.h>
+#include <LibGUI/Widget.h>
+#include <LibGfx/Bitmap.h>
+#include <LibGfx/Font.h>
+#include <LibGfx/StandardCursor.h>
+
+namespace Pong {
+
+class Game final : public GUI::Widget {
+    C_OBJECT(Game);
+
+public:
+    static const int game_width = 560;
+    static const int game_height = 480;
+
+    virtual ~Game() override;
+
+private:
+    Game();
+
+    virtual void paint_event(GUI::PaintEvent&) override;
+    virtual void keyup_event(GUI::KeyEvent&) override;
+    virtual void keydown_event(GUI::KeyEvent&) override;
+    virtual void mousemove_event(GUI::MouseEvent&) override;
+    virtual void timer_event(Core::TimerEvent&) override;
+
+    void reset();
+    void reset_ball(int serve_to_player);
+    void reset_paddles();
+    void tick();
+    void round_over(int player);
+    void game_over(int player);
+    void calculate_move();
+
+    struct Ball {
+        Gfx::FloatPoint position;
+        Gfx::FloatPoint velocity;
+        float radius { 4 };
+
+        float x() const { return position.x(); }
+        float y() const { return position.y(); }
+
+        Gfx::FloatRect rect() const
+        {
+            return { x() - radius, y() - radius, radius * 2, radius * 2 };
+        }
+    };
+
+    struct Paddle {
+        Gfx::FloatRect rect;
+        float speed { 5 };
+        float width { 8 };
+        float height { 28 };
+        bool moving_up { false };
+        bool moving_down { false };
+        Gfx::Color color { Color::White };
+    };
+
+    struct Net {
+        Gfx::Color color { Color::White };
+        Gfx::FloatRect rect() const
+        {
+            return { (game_width / 2) - 1, 0, 2, game_height };
+        }
+    };
+
+    Gfx::IntRect player_1_score_rect() const
+    {
+        int score_width = font().width(String::formatted("{}", m_player_1_score));
+        return { (game_width / 2) + score_width + 2, 2, score_width, font().glyph_height() };
+    }
+
+    Gfx::IntRect player_2_score_rect() const
+    {
+        int score_width = font().width(String::formatted("{}", m_player_2_score));
+        return { (game_width / 2) - score_width - 2, 2, score_width, font().glyph_height() };
+    }
+
+    Net m_net;
+    Ball m_ball;
+    Paddle m_player1_paddle;
+    Paddle m_player2_paddle;
+
+    int m_score_to_win = 21;
+    int m_player_1_score = 0;
+    int m_player_2_score = 0;
+};
+
+}

Games/Pong/main.cpp

@@ -0,0 +1,93 @@
+/*
+ * Copyright (c) 2020, the SerenityOS developers.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "Game.h"
+#include <LibCore/ConfigFile.h>
+#include <LibGUI/AboutDialog.h>
+#include <LibGUI/Application.h>
+#include <LibGUI/Icon.h>
+#include <LibGUI/Menu.h>
+#include <LibGUI/MenuBar.h>
+#include <LibGUI/Window.h>
+#include <LibGfx/Bitmap.h>
+
+int main(int argc, char** argv)
+{
+    if (pledge("stdio rpath wpath cpath shared_buffer accept cpath unix fattr", nullptr) < 0) {
+        perror("pledge");
+        return 1;
+    }
+
+    auto app = GUI::Application::construct(argc, argv);
+
+    if (pledge("stdio rpath wpath cpath shared_buffer accept", nullptr) < 0) {
+        perror("pledge");
+        return 1;
+    }
+
+    auto config = Core::ConfigFile::get_for_app("Pong");
+
+    if (unveil("/res", "r") < 0) {
+        perror("unveil");
+        return 1;
+    }
+
+    if (unveil(config->file_name().characters(), "rwc") < 0) {
+        perror("unveil");
+        return 1;
+    }
+
+    if (unveil(nullptr, nullptr) < 0) {
+        perror("unveil");
+        return 1;
+    }
+
+    auto window = GUI::Window::construct();
+    window->resize(Pong::Game::game_width, Pong::Game::game_height);
+    auto app_icon = GUI::Icon::default_icon("app-pong");
+    window->set_icon(app_icon.bitmap_for_size(16));
+    window->set_title("Pong");
+    window->set_double_buffering_enabled(false);
+    window->set_main_widget<Pong::Game>();
+    window->show();
+
+    auto menubar = GUI::MenuBar::construct();
+
+    auto& app_menu = menubar->add_menu("Pong");
+    app_menu.add_action(GUI::CommonActions::make_quit_action([](auto&) {
+        GUI::Application::the()->quit();
+        return;
+    }));
+
+    auto& help_menu = menubar->add_menu("Help");
+    help_menu.add_action(GUI::Action::create("About", [&](const GUI::Action&) {
+        GUI::AboutDialog::show("Pong", app_icon.bitmap_for_size(32), window);
+    }));
+
+    app->set_menubar(move(menubar));
+
+    return app->exec();
+}