56 lines
1.5 KiB
C++
56 lines
1.5 KiB
C++
#include "classicflyinganimationscenario.h"
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#include "classicsprite.h"
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void ClassicFlyingAnimationScenario::launch(const std::shared_ptr<ClassicSprite> sprite, const microsec& time_begin, const microsec &time_end)
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{
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_sprite = sprite;
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_time_begin = time_begin;
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_time_end = time_end;
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_percentage = ((_time_end - _time_begin) * 0.01);
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}
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float ClassicFlyingAnimationScenario::getPoint(float n1, float n2, float perc) const
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{
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float diff = n2 - n1;
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return n1 + ( diff * perc );
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}
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void ClassicFlyingAnimationScenario::update(const microsec& music_offset)
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{
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const auto crd = _sprite->coordinates();
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auto update_time = music_offset - _time_begin;
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float i = update_time / _percentage * 0.01;
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float xa = getPoint( crd.x + 20. , crd.x + 90. , i );
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float ya = getPoint( crd.y - 600. , crd.y - 150. , i );
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float xb = getPoint( crd.x + 90. , crd.x , i );
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float yb = getPoint( crd.y - 150. , crd.y , i );
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_sprite->setTrailCoordinates({getPoint( xa , xb , i ), getPoint( ya , yb , i )});
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bool pastPerfectScore = (i >= 1);
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if (pastPerfectScore)
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fadeTrailSprite();
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}
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bool ClassicFlyingAnimationScenario::isDone() const
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{
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return false;
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}
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void ClassicFlyingAnimationScenario::fadeTrailSprite() const
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{
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auto fill_color = _sprite->trailColor();
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if (fill_color.a == 0)
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return;
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auto new_alpha = fill_color.a - 35;
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fill_color.a = new_alpha < 0 ? 0 : new_alpha;
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_sprite->setTrailColor(fill_color);
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}
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