153 lines
4.2 KiB
C++
153 lines
4.2 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop application for the Telegram messaging service.
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For license and copyright information please follow this link:
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https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
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*/
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#include "ui/effects/premium_stars.h"
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#include "base/random.h"
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#include "ui/effects/animation_value_f.h"
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#include <QtCore/QtMath>
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namespace Ui {
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namespace Premium {
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constexpr auto kDeformationMax = 0.1;
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MiniStars::MiniStars(Fn<void(const QRect &r)> updateCallback, bool opaque)
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: _availableAngles({
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Interval{ -10, 40 },
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Interval{ 180 + 10 - 40, 40 },
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Interval{ 180 + 15, 50 },
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Interval{ -15 - 50, 50 },
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})
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, _lifeLength({ 150 / 5, 200 / 5 })
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, _deathTime({ 1500, 2000 })
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, _size({ 5, 10 })
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, _alpha({ opaque ? 100 : 40, opaque ? 100 : 60 })
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, _sinFactor({ 10, 190 })
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, _appearProgressTill(0.2)
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, _disappearProgressAfter(0.8)
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, _distanceProgressStart(0.5)
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, _sprite(u":/gui/icons/settings/starmini.svg"_q)
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, _animation([=](crl::time now) {
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if (now > _nextBirthTime && !_paused) {
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createStar(now);
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_nextBirthTime = now + randomInterval(_lifeLength);
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}
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if (_rectToUpdate.isValid()) {
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updateCallback(base::take(_rectToUpdate));
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}
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}) {
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if (anim::Disabled()) {
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const auto from = _deathTime.from + _deathTime.length;
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for (auto i = -from; i < 0; i += randomInterval(_lifeLength)) {
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createStar(i);
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}
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updateCallback(_rectToUpdate);
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} else {
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_animation.start();
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}
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}
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int MiniStars::randomInterval(const Interval &interval) const {
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return interval.from + base::RandomIndex(interval.length);
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}
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crl::time MiniStars::timeNow() const {
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return anim::Disabled() ? 0 : crl::now();
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}
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void MiniStars::paint(QPainter &p, const QRectF &rect) {
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const auto center = rect.center();
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const auto opacity = p.opacity();
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for (const auto &ministar : _ministars) {
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const auto progress = (timeNow() - ministar.birthTime)
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/ float64(ministar.deathTime - ministar.birthTime);
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if (progress > 1.) {
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continue;
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}
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const auto appearProgress = std::clamp(
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progress / _appearProgressTill,
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0.,
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1.);
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const auto rsin = float(std::sin(ministar.angle * M_PI / 180.));
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const auto rcos = float(std::cos(ministar.angle * M_PI / 180.));
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const auto end = QPointF(
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rect.width() / kSizeFactor * rcos,
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rect.height() / kSizeFactor * rsin);
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const auto alphaProgress = 1.
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- (std::clamp(progress - _disappearProgressAfter, 0., 1.)
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/ (1. - _disappearProgressAfter));
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p.setOpacity(ministar.alpha
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* alphaProgress
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* appearProgress
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* opacity);
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const auto deformResult = progress * 360;
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const auto rsinDeform = float(
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std::sin(ministar.sinFactor * deformResult * M_PI / 180.));
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const auto deformH = 1. + kDeformationMax * rsinDeform;
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const auto deformW = 1. / deformH;
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const auto distanceProgress = _distanceProgressStart + progress;
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const auto starSide = ministar.size * appearProgress;
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const auto widthFade = (std::abs(rcos) >= std::abs(rsin));
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const auto starWidth = starSide
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* (widthFade ? alphaProgress : 1.)
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* deformW;
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const auto starHeight = starSide
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* (!widthFade ? alphaProgress : 1.)
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* deformH;
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const auto renderRect = QRectF(
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center.x()
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+ anim::interpolateF(0, end.x(), distanceProgress)
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- starWidth / 2.,
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center.y()
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+ anim::interpolateF(0, end.y(), distanceProgress)
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- starHeight / 2.,
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starWidth,
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starHeight);
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_sprite.render(&p, renderRect);
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_rectToUpdate |= renderRect.toRect();
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}
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p.setOpacity(opacity);
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}
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void MiniStars::setPaused(bool paused) {
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_paused = paused;
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}
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int MiniStars::angle() const {
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const auto &interval = _availableAngles[
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base::RandomIndex(_availableAngles.size())];
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return base::RandomIndex(interval.length) + interval.from;
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}
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void MiniStars::createStar(crl::time now) {
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auto ministar = MiniStar{
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.birthTime = now,
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.deathTime = now + randomInterval(_deathTime),
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.angle = angle(),
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.size = float64(randomInterval(_size)),
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.alpha = float64(randomInterval(_alpha)) / 100.,
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.sinFactor = randomInterval(_sinFactor) / 100.
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* (base::RandomIndex(2) == 1 ? 1. : -1.),
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};
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for (auto i = 0; i < _ministars.size(); i++) {
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if (ministar.birthTime > _ministars[i].deathTime) {
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_ministars[i] = ministar;
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return;
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}
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}
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_ministars.push_back(ministar);
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}
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} // namespace Premium
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} // namespace Ui
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