// DragonX Wallet - ImGui Edition
// Copyright 2024-2026 The Hush Developers
// Released under the GPLv3
#pragma once
#include <cmath>

namespace dragonx { namespace ui { namespace effects {

constexpr double kEffectTwoPi = 6.283185307179586476925286766559;

/// Fractional part in [0,1) of t*rate + offset, evaluated in double so the result stays
/// smooth after days of uptime (a float clock steps at one-frame granularity from ~3 days).
inline double cyclePhaseD(double t, double rate, double offset = 0.0) {
    double p = std::fmod(t * rate + offset, 1.0);
    if (p < 0.0) p += 1.0;
    if (p >= 1.0) p = 0.0;        // p was -tiny: p + 1.0 rounded up to 1.0
    return p;
}
inline float cyclePhase(double t, double rate, double offset = 0.0) {
    return static_cast<float>(cyclePhaseD(t, rate, offset));
}
/// sin(2*pi*(t*cycles + offset)) - oscillator whose speed is in cycles per second.
inline float cycleSin(double t, double cycles, double offset = 0.0) {
    return static_cast<float>(std::sin(kEffectTwoPi * cyclePhaseD(t, cycles, offset)));
}
/// sin/cos(t*omega + offset), omega in rad/s; argument reduced in double.
inline float radSin(double t, double omega, double offset = 0.0) {
    return static_cast<float>(std::sin(std::fmod(t * omega + offset, kEffectTwoPi)));
}
inline float radCos(double t, double omega, double offset = 0.0) {
    return static_cast<float>(std::cos(std::fmod(t * omega + offset, kEffectTwoPi)));
}

}}} // namespace