#include <SDL3/SDL.h>
#include <algorithm>

#include "freelook_system.hpp"

namespace
Nimbin
{

static constexpr double
FREELOOK_LERP_DUR = 0.20;


void
FreelookSystem::begin()
{
    state.active  = true;
    state.lerping = false;
}


void
FreelookSystem::end()
{
    state.active  = false;
    state.lerping = true;
    state.lerp_t  = 0.0;
}


void
FreelookSystem::update(double dt)
{
    if (!state.lerping) return;

    state.lerp_t += dt / FREELOOK_LERP_DUR;
    if (state.lerp_t >= 1.0) {
        state.lerp_t  = 1.0;
        state.lerping = false;
    }
}

} // namespace Nimbin