From 192e371d2f500a048638e123dde2493bcd527484 Mon Sep 17 00:00:00 2001
From: NaiJi <naijiworld@protonmail.com>
Date: Fri, 11 Jun 2021 19:58:44 +0300
Subject: [PATCH] All simple curve flying animation

---
 include/application.h               |  2 +-
 include/note.h                      |  3 +-
 include/precisionevaluator.h        | 10 +++---
 include/timeline.h                  |  2 +-
 src/application.cpp                 |  8 +++--
 src/classicgame/classicgame.cpp     | 47 +++++++++++++++++++++----
 src/classicgame/classicgame.h       |  6 +++-
 src/classicgame/classicnote.cpp     | 53 ++++++++++++++++++++++++-----
 src/classicgame/classicnote.h       | 25 +++++++++++---
 src/classicgame/classicsprite.cpp   | 12 +++++--
 src/classicgame/classicsprite.h     |  4 ++-
 src/classicgame/classictimeline.cpp | 33 +++++++++++++-----
 src/classicgame/classictimeline.h   |  4 +--
 13 files changed, 164 insertions(+), 45 deletions(-)

diff --git a/include/application.h b/include/application.h
index 7fda7e8..35b64d1 100644
--- a/include/application.h
+++ b/include/application.h
@@ -30,7 +30,7 @@ private:
 
     std::unique_ptr<Game> _game;
 
-    void startGameLoop();
+    void exec();
 };
 
 #endif // APPLICATION_H
diff --git a/include/note.h b/include/note.h
index df70b3f..ffd9165 100644
--- a/include/note.h
+++ b/include/note.h
@@ -13,7 +13,8 @@ public:
         _perfect_offset(perfect_offset) {}
     virtual ~Note() = default;
 
-    virtual bool isActive(microsec music_offset) const = 0;
+    virtual bool isActive(const microsec& music_offset) const = 0;
+    virtual void update(const microsec& music_offset) = 0;
     virtual void draw(sf::RenderTarget& target, sf::RenderStates states) const = 0;
 
     virtual microsec offset() const
diff --git a/include/precisionevaluator.h b/include/precisionevaluator.h
index b24b53b..97a4d7e 100644
--- a/include/precisionevaluator.h
+++ b/include/precisionevaluator.h
@@ -10,7 +10,7 @@
 
 using microsec = sf::Int64;
 
-template<typename GRADE, typename = std::enable_if_t<std::is_enum<GRADE>::value>>
+template<typename Grade, typename = std::enable_if_t<std::is_enum<Grade>::value>>
 class PrecisionEvaluator
 {
 public:
@@ -34,7 +34,7 @@ public:
             && music_play_offset < _end_handling_offset;
     }
 
-    inline GRADE calculatePrecision(microsec odds) const noexcept
+    inline Grade calculatePrecision(microsec odds) const noexcept
     {
         microsec shift_from_perfect = std::abs(odds - offset());
 
@@ -45,7 +45,7 @@ public:
                 break;
         }
 
-        return static_cast<GRADE>(raw_grade);
+        return static_cast<Grade>(raw_grade);
     }
 
 private:
@@ -53,9 +53,9 @@ private:
     microsec _start_handling_offset;
     microsec _end_handling_offset;
 
-    /* Amount of values in enum instanced as GRADES
+    /* Amount of values in enum instanced as GradeS
      * represents capacity of _intervals.
-     * So, for each V value in GRADES enum, _intervals[V]
+     * So, for each V value in GradeS enum, _intervals[V]
      * should return time shift from V - 1.
      * V0 is PERFECT SCORE and the last V represents the worst
      * grades which is death of note by expiration */
diff --git a/include/timeline.h b/include/timeline.h
index f303393..b51aad9 100644
--- a/include/timeline.h
+++ b/include/timeline.h
@@ -13,7 +13,7 @@ public:
     virtual ~Timeline() = default;
 
     virtual void update() = 0;
-    virtual void init() = 0;
+    virtual void run() = 0;
     virtual void clear() = 0;
 
     virtual microsec currentMusicOffset() const = 0;
diff --git a/src/application.cpp b/src/application.cpp
index c9003bf..825e76f 100644
--- a/src/application.cpp
+++ b/src/application.cpp
@@ -24,11 +24,12 @@ Application::~Application()
 void Application::run()
 {
     _game_window.display();
+    _game->run();
 
-    startGameLoop();
+    exec();
 }
 
-void Application::startGameLoop()
+void Application::exec()
 {
     sf::Clock timer;
     sf::Time time_since_last_update = sf::Time::Zero;
@@ -54,6 +55,9 @@ void Application::input()
     sf::Event event;
     while (_game_window.pollEvent(event))
     {
+        if (event.type == sf::Event::Closed)
+            _game_window.close();
+
         _game->input(event);
     }
 }
diff --git a/src/classicgame/classicgame.cpp b/src/classicgame/classicgame.cpp
index 69a678f..9575f80 100644
--- a/src/classicgame/classicgame.cpp
+++ b/src/classicgame/classicgame.cpp
@@ -8,9 +8,7 @@ ClassicGame::ClassicGame() :
     _timeline(std::make_unique<ClassicTimeline>()),
     _view_manager(std::make_unique<ClassicViewManager>())
 {
-    _timeline->fetchVisibleNotes(_view_manager);
-    _timeline->init();
-
+    _font.loadFromFile("VeraMono.ttf");
     _keys_to_buttons =
     {
         {sf::Keyboard::Up, Button::UP},      // Load from settings
@@ -55,7 +53,8 @@ ClassicGame::~ClassicGame()
 
 void ClassicGame::run()
 {
-
+    _timeline->fetchVisibleNotes(_view_manager);
+    _timeline->run();
 }
 
 void ClassicGame::input(const sf::Event& event)
@@ -66,7 +65,8 @@ void ClassicGame::input(const sf::Event& event)
     switch (event.type)
     {
     default:
-        break;
+        return;
+        break;        
     case sf::Event::KeyPressed:
         {
             if (_keys_to_buttons.find(event.key.code) != _keys_to_buttons.end())
@@ -83,8 +83,26 @@ void ClassicGame::input(const sf::Event& event)
 
     auto note = _timeline->getActiveNote();
 
-    if (!_timeline->isExpired(note))
-        (*note)->input(ClassicInputType(timestamp, new_action));
+    if (!_timeline->isExpired(note) || (*note)->state() != ClassicNote::State::DEAD)
+    {
+        auto grade = (*note)->input(ClassicInputType(timestamp, new_action));
+
+        sf::Text new_grade;
+        new_grade.setFillColor(sf::Color::White);
+        new_grade.setPosition((*note)->getCoordinates().x, (*note)->getCoordinates().y - 40);
+        switch (grade)
+        {
+        case ClassicNote::Grade::PERFECT:
+            new_grade.setString("PERFECT"); break;
+        case ClassicNote::Grade::GOOD:
+            new_grade.setString("GOOD"); break;
+        case ClassicNote::Grade::BAD:
+            new_grade.setString("BAD"); break;
+        }
+
+        new_grade.setFont(_font);
+        _grades.emplace_back(new_grade);
+    }
 }
 
 Action ClassicGame::getActionKeyPressed(Button button) const
@@ -101,9 +119,24 @@ void ClassicGame::update()
 {
     _timeline->update();
     _timeline->fetchVisibleNotes(_view_manager);
+
+    for (auto& grade : _grades)
+    {
+        if (grade.getFillColor().a > 20)
+        {
+            grade.setFillColor(sf::Color(255, 255, 255, grade.getFillColor().a - 20));
+        }
+    }
+
+    _grades.remove_if([](const auto& grade) { return grade.getFillColor().a <= 20; });
 }
 
 void ClassicGame::draw(sf::RenderWindow& window) const
 {
     _timeline->drawVisibleNotes(window);
+
+    for (auto& grade : _grades)
+    {
+        window.draw(grade);
+    }
 }
diff --git a/src/classicgame/classicgame.h b/src/classicgame/classicgame.h
index 125d8f3..3dc00cf 100644
--- a/src/classicgame/classicgame.h
+++ b/src/classicgame/classicgame.h
@@ -2,7 +2,8 @@
 #define CLASSICGAME_H
 
 #include <map>
-
+#include <list>
+#include <SFML/Graphics/Text.hpp>
 #include "game.h"
 #include "classicactions.h"
 
@@ -31,6 +32,9 @@ private:
 
     std::unique_ptr<ClassicTimeline> _timeline;
     std::unique_ptr<ClassicViewManager> _view_manager;
+
+    sf::Font _font;
+    std::list<sf::Text> _grades;
 };
 
 #endif // CLASSICGAME_H
diff --git a/src/classicgame/classicnote.cpp b/src/classicgame/classicnote.cpp
index 84c4734..e327feb 100644
--- a/src/classicgame/classicnote.cpp
+++ b/src/classicgame/classicnote.cpp
@@ -8,22 +8,43 @@ ClassicNote::ClassicNote(const std::vector<microsec>& intervals, microsec perfec
     Note(perfect_offset),
     _coordinates(coord),
     _evaluator(intervals, _perfect_offset),
-    _action(action)
+    _action(action),
+    _appearance_time(0)
 {}
 
-bool ClassicNote::isActive(microsec music_offset) const
+bool ClassicNote::isActive(const microsec& music_offset) const
 {
     return _evaluator.isActive(music_offset);
 }
 
+static int getPt( int n1 , int n2 , float perc )
+{
+    int diff = n2 - n1;
+
+    return n1 + ( diff * perc );
+}
+
+void ClassicNote::update(const microsec& music_offset)
+{
+    auto update_time = music_offset - _appearance_time;
+    auto i = update_time / _trail_path_percent / 100;
+
+    int xa = getPt( 720./2. , 1280./2. , i );
+    int ya = getPt( 0 , 720./2. , i );
+    int xb = getPt( 1280./2. , _coordinates.x , i );
+    int yb = getPt( 720./2. , _coordinates.y , i );
+
+    _sprite->setTrailCoordinates(getPt( xa , xb , i ), getPt( ya , yb , i ));
+}
+
 void ClassicNote::draw(sf::RenderTarget& target, sf::RenderStates states) const
 {
     target.draw(*_sprite, states);
 }
 
-ClassicNote::GRADE ClassicNote::input(ClassicInputType&& input_data)
-{
-    auto grade = ClassicNote::GRADE::BAD;
+auto ClassicNote::input(ClassicInputType&& input_data) -> Grade
+{ 
+    auto grade = ClassicNote::Grade::BAD;
 
     if (input_data == _action)
     {
@@ -31,7 +52,7 @@ ClassicNote::GRADE ClassicNote::input(ClassicInputType&& input_data)
     }
 
     std::cout << "User input: " << static_cast<int>(grade) << "\n";
-
+    _state = State::DEAD;
     return grade;
 }
 
@@ -40,19 +61,35 @@ Action ClassicNote::action() const
     return _action;
 }
 
+auto ClassicNote::state() const -> State
+{
+    return _state;
+}
+
+void ClassicNote::setState(State next_state)
+{
+    _state = next_state;
+}
+
 std::shared_ptr<ClassicSprite> ClassicNote::sprite() const noexcept
 {
     return _sprite;
 }
 
+void ClassicNote::saveAppearanceTime(const microsec &offset)
+{
+    _appearance_time = offset;
+    _trail_path_percent = ((_perfect_offset - _appearance_time) * 0.01);
+}
+
 void ClassicNote::setSprite(const std::shared_ptr<ClassicSprite>& sprite) noexcept
 {
     _sprite = sprite;
     if (_sprite)
-        _sprite->setCoordinates(_coordinates.x, _coordinates.y);
+        _sprite->setCoordinates(_coordinates.x, _coordinates.y, 720/2, 50);
 }
 
-inline const Coordinates& ClassicNote::getCoordinates() const noexcept
+const Coordinates& ClassicNote::getCoordinates() const noexcept
 {
     return _coordinates;
 }
diff --git a/src/classicgame/classicnote.h b/src/classicgame/classicnote.h
index 3320197..d6caae3 100644
--- a/src/classicgame/classicnote.h
+++ b/src/classicgame/classicnote.h
@@ -23,31 +23,46 @@ class ClassicNote : public Note
 {
 public:
 
-    enum class GRADE
+    enum class Grade
     {
         PERFECT,
            GOOD,
             BAD
     };
 
+    enum class State
+    {
+        FLYING,
+         DYING,
+          DEAD
+    };
+
     explicit ClassicNote(const std::vector<microsec>& intervals, microsec perfect_offset,
                          Action action, const Coordinates& coord);
     virtual ~ClassicNote() = default;
 
-    virtual bool isActive(microsec music_offset) const override;
+    virtual bool isActive(const microsec& music_offset) const override;
+    virtual void update(const microsec &music_offset) override;
     virtual void draw(sf::RenderTarget& target, sf::RenderStates states) const override;
 
-    GRADE input(ClassicInputType&& input_data);
+    Grade input(ClassicInputType&& input_data);
     Action action() const;
+    State state() const;
+
+    void setState(State next_state);
 
     std::shared_ptr<ClassicSprite> sprite() const noexcept;
+    void saveAppearanceTime(const microsec& offset);
     void setSprite(const std::shared_ptr<ClassicSprite>& sprite) noexcept;
-    inline const Coordinates& getCoordinates() const noexcept;
+    const Coordinates& getCoordinates() const noexcept;
 
 private:
     const Coordinates _coordinates;
-    const PrecisionEvaluator<GRADE> _evaluator;
+    const PrecisionEvaluator<Grade> _evaluator;
     const Action _action;
+    State _state = State::FLYING;
 
     std::shared_ptr<ClassicSprite> _sprite;
+    microsec _appearance_time;
+    float _trail_path_percent; //100% for sprite falling trajectory
 };
diff --git a/src/classicgame/classicsprite.cpp b/src/classicgame/classicsprite.cpp
index a7e8cde..80a43ea 100644
--- a/src/classicgame/classicsprite.cpp
+++ b/src/classicgame/classicsprite.cpp
@@ -2,15 +2,23 @@
 #include <SFML/Graphics/RenderTarget.hpp>
 
 ClassicSprite::ClassicSprite(const sf::RectangleShape& shape) :
-    _shape(shape)
+    _shape(shape),
+    _trail(shape)
 {}
 
 void ClassicSprite::draw(sf::RenderTarget& target, sf::RenderStates states) const
 {
     target.draw(_shape, states);
+    target.draw(_trail, states);
 }
 
-void ClassicSprite::setCoordinates(float x, float y) noexcept
+void ClassicSprite::setCoordinates(float x, float y, float trail_x, float trail_y) noexcept
 {
     _shape.setPosition(x, y);
+    _trail.setPosition(trail_x, trail_y);
+}
+
+void ClassicSprite::setTrailCoordinates(float trail_x, float trail_y) noexcept
+{
+    _trail.setPosition(trail_x, trail_y);
 }
diff --git a/src/classicgame/classicsprite.h b/src/classicgame/classicsprite.h
index fac4054..9de9f09 100644
--- a/src/classicgame/classicsprite.h
+++ b/src/classicgame/classicsprite.h
@@ -9,8 +9,10 @@ public:
     ClassicSprite(const sf::RectangleShape& shape);
     virtual void draw(sf::RenderTarget& target, sf::RenderStates states) const override;
 
-    void setCoordinates(float x, float y) noexcept;
+    void setCoordinates(float x, float y, float trail_x, float trail_y) noexcept;
+    void setTrailCoordinates(float trail_x, float trail_y) noexcept;
 
 private:
     sf::RectangleShape _shape;
+    sf::RectangleShape _trail;
 };
diff --git a/src/classicgame/classictimeline.cpp b/src/classicgame/classictimeline.cpp
index 7020b91..5ecb39a 100644
--- a/src/classicgame/classictimeline.cpp
+++ b/src/classicgame/classictimeline.cpp
@@ -11,20 +11,20 @@ ClassicTimeline::ClassicTimeline()
     // Length is 1:14
     // I calculated that the time between beats is about 1412162 microseconds
 
-    std::string song_filename = "/home/naiji/METEOR.flac";
+    std::string song_filename = "METEOR.flac";
 
     _music.openFromFile(song_filename);
     _music.setVolume(10);
 
     _timeline.reserve(1000);
 
-    microsec starting_beat_offset = 372162;
+    microsec starting_beat_offset = 352162;
     int amount_of_beats = 209;
     microsec interval = 1412162;
     microsec note_input_offset = 412162;
     microsec bpm_iterator = starting_beat_offset;
     microsec bpm_end = starting_beat_offset + (interval * amount_of_beats);
-    _visibility_offset = note_input_offset * 6;
+    _visibility_offset = note_input_offset * 8;
 
     _timeline.emplace_back(new ClassicNote({note_input_offset}, bpm_iterator, Action::PRESS_DOWN, {90, 90}));
     bpm_iterator += interval;
@@ -35,10 +35,13 @@ ClassicTimeline::ClassicTimeline()
     _timeline.emplace_back(new ClassicNote({note_input_offset}, bpm_iterator, Action::PRESS_LEFT, {290, 90}));
     bpm_iterator += interval;
 
+    float x = 90.;
+
     while (bpm_iterator < bpm_end)
     {
-        _timeline.emplace_back(new ClassicNote({note_input_offset}, bpm_iterator, Action::PRESS_UP, {390, 390}));
+        _timeline.emplace_back(new ClassicNote({note_input_offset}, bpm_iterator, Action::PRESS_UP, {x, 390.}));
         bpm_iterator += interval;
+        x += 70;
     }
 
     expire(_last_visible_note);
@@ -46,7 +49,7 @@ ClassicTimeline::ClassicTimeline()
     _top_note = _timeline.begin();
 }
 
-void ClassicTimeline::init()
+void ClassicTimeline::run()
 {
     _music.play();
 }
@@ -113,7 +116,7 @@ microsec ClassicTimeline::currentMusicOffset() const
     return _music.getPlayingOffset().asMicroseconds();
 }
 
-void ClassicTimeline::discardExpiredNotes(const std::unique_ptr<ClassicViewManager> &view_manager, const microsec &music_offset)
+void ClassicTimeline::discardExpiredNotes(const std::unique_ptr<ClassicViewManager> &view_manager)
 {
     if (_top_note == _timeline.begin())
         return;
@@ -137,15 +140,25 @@ bool ClassicTimeline::isVisiblyClose(const Iterator &iterator, const microsec &m
 
 void ClassicTimeline::fetchVisibleNotes(const std::unique_ptr<ClassicViewManager>& view_manager)
 {
-    microsec music_offset = currentMusicOffset();
-    discardExpiredNotes(view_manager, music_offset);
+    const microsec music_offset = currentMusicOffset();
+    discardExpiredNotes(view_manager);
 
     Iterator note_iterator = _top_note;
     while (isVisiblyClose(note_iterator, music_offset))
     {
         ClassicNote* note = *note_iterator;
         if (!note->sprite())
+        {
+            note->saveAppearanceTime(music_offset);
             view_manager->initNoteSprite(note);
+        }
+
+        if (note->state() == ClassicNote::State::DEAD)
+        {
+            view_manager->resetNoteSprite(note);
+        }
+        else
+            note->update(music_offset);
 
         ++note_iterator;
     }
@@ -157,13 +170,15 @@ void ClassicTimeline::drawVisibleNotes(sf::RenderWindow &window) const
 {
     bool no_visible_notes = isExpired(_last_visible_note)
                          || _top_note > _last_visible_note;
+
     if (no_visible_notes)
         return;
 
     Iterator note_to_draw = _top_note;
     while (note_to_draw != (_last_visible_note))
     {
-        window.draw(*(*note_to_draw));
+        if ((*note_to_draw)->sprite())
+            window.draw(*(*note_to_draw));
         ++note_to_draw;
     }
 }
diff --git a/src/classicgame/classictimeline.h b/src/classicgame/classictimeline.h
index c6f05c2..68cd7b0 100644
--- a/src/classicgame/classictimeline.h
+++ b/src/classicgame/classictimeline.h
@@ -14,7 +14,7 @@ public:
     explicit ClassicTimeline();
     virtual ~ClassicTimeline();
     virtual void update() override;
-    virtual void init() override;
+    virtual void run() override;
     virtual void clear() override;
 
     virtual microsec currentMusicOffset() const override;
@@ -41,7 +41,7 @@ private:
 
     void checkCurrentActiveNote(const microsec &music_offset);
     void checkForNextActiveNote(const microsec &music_offset);
-    void discardExpiredNotes(const std::unique_ptr<ClassicViewManager>& view_manager, const microsec &music_offset);
+    void discardExpiredNotes(const std::unique_ptr<ClassicViewManager>& view_manager);
     bool isVisiblyClose(const Iterator& iterator, const microsec& music_offset) const;
 
     /* Difference between top and active note is that