Function xFFXShakeUpdateEnt

src/SB/Core/x/xFFX.cpp:130–160

regswap

// regswap
void xFFXShakeUpdateEnt(xEnt* ent, xScene* sc, F32 dt, void* fdata)
{
    xFFXShakeState* ss = (xFFXShakeState*)fdata;
    F32 tnext = ss->tmr + dt;
    F32 mag = xexp(ss->alpha * tnext);

    mag *= isin(ss->freq * tnext);

    if (ss->tmr == 0.0f)
    {
        ss->lval = 0.0f;
    }
    else
    {
        if (ss->tmr >= ss->dur)
        {
            if (ss->lval * mag < 0.0f)
            {
                xFFXRemoveEffectByFData(ent, fdata);
                xFFXShakeFree(ss);
                return;
            }
        }
    }

    xVec3 dv;
    xVec3SMul(&dv, (xVec3*)fdata, mag - ss->lval);
    xVec3AddTo((xVec3*)(&ent->frame->mat.pos), &dv);
    ss->lval = mag;
    ss->tmr = tnext;
}

void xFFXShakePoolInit(U32 num)
{