Function xEntPenMove

src/SB/Core/x/xEntMotion.cpp:537–563

}

static void xEntPenMove(xEntMotion* motion, xScene* sc, F32 dt, xEntFrame* frame)
{
    xEntPenData* pen = &motion->pen;
    xEntMotionPenData* aspen = &motion->asset->pen;
    F32 th = (dt * 0.5f) * pen->w;
    F32 rem = motion->t + (dt * 0.5f);
    F32 dangle = (aspen->range * 2.0f) * isin(th) * icos((rem * pen->w) + aspen->phase);
    F32 newt = motion->t - aspen->period;

    if (newt > 0.0f)
    {
        motion->t = motion->t - aspen->period;
    }

    if ((-newt < dt) && (-newt > 0.0f))
    {
        xMat4x3Copy(&frame->mat, &motion->pen.omat);
        frame->mode = 0x11;
    }
    else
    {
        xMat4x3 delta_mat;
        xMat4x3Rot(&delta_mat, &frame->mat.at, dangle, &pen->top);
        xMat4x3Mul(&frame->mat, &frame->mat, &delta_mat);
        frame->mode = 0x41;
    }
}

static void xEntMechMove(xEntMotion* motion, xScene* sc, F32 dt, xEntFrame* frame)
{