project-kyoku/modes/classicmode/graphics/classicdyinganimationscenario.cpp

#include "classicdyinganimationscenario.h"
#include "classicsprite.h"

void ClassicDyingAnimationScenario::launch(const std::shared_ptr<ClassicSprite> sprite, const microsec& time_begin, const microsec &time_end)
{
    _sprite = sprite;
    _time_begin = time_begin;
    _time_end = time_end;

    _sprite->setColor(sf::Color(140, 140, 140));
    _sprite->setTrailColor(sf::Color(0, 0, 0, 0));
    _sprite->setTrailCoordinates({0, 0});
}

void ClassicDyingAnimationScenario::update(const microsec& music_offset)
{
    (void) music_offset;

    auto fill_color = _sprite->color();

    if (fill_color.a == 0)
    {
        fill_color.a = 0;
        _sprite->setColor(fill_color);
        return;
    }

    auto new_alpha = fill_color.a - 15;
    fill_color.a = new_alpha < 0 ? 0 : new_alpha;

    _sprite->setColor(fill_color);
}

bool ClassicDyingAnimationScenario::isDone() const
{
    return _sprite->color().a == 0;
}