63 lines
1.4 KiB
C++
63 lines
1.4 KiB
C++
// screen_fade.cpp - Implementació de la fosa a/desde negre
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// © 2026 JailDesigner
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#include "core/graphics/screen_fade.hpp"
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#include <algorithm>
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#include <cmath>
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#include "core/defaults/game.hpp"
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namespace Graphics {
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ScreenFade::ScreenFade(Rendering::Renderer* renderer)
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: renderer_(renderer) {}
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void ScreenFade::start(float from, float to, float duration) {
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from_ = from;
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to_ = to;
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duration_ = duration;
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elapsed_ = 0.0F;
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active_ = true;
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}
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void ScreenFade::update(float delta_time) {
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if (!active_) {
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return;
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}
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elapsed_ += delta_time;
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}
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auto ScreenFade::alpha() const -> float {
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if (!active_) {
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return 0.0F;
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}
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if (duration_ <= 0.0F) {
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return to_;
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}
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const float T = std::clamp(elapsed_ / duration_, 0.0F, 1.0F);
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return std::lerp(from_, to_, T);
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}
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auto ScreenFade::isDone() const -> bool {
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return !active_ || elapsed_ >= duration_;
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}
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void ScreenFade::draw() const {
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const float A = alpha();
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if (A <= 0.0F) {
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return;
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}
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renderer_->pushRect(
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0.0F,
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0.0F,
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static_cast<float>(Defaults::Game::WIDTH),
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static_cast<float>(Defaults::Game::HEIGHT),
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0.0F,
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0.0F,
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0.0F,
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A);
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}
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} // namespace Graphics
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