Function simulate_fall

plugins/dig-now.cpp:837–848

if pos is empty space, teleport to a floor somewhere below if we fall out of the world (e.g. empty space or walls all the way down), returned position will be invalid

// if we fall out of the world (e.g. empty space or walls all the way down),
// returned position will be invalid
static DFCoord simulate_fall(const DFCoord &pos) {
    DFCoord resting_pos(pos);

    while (Maps::ensureTileBlock(resting_pos)) {
        df::tiletype tt = *Maps::getTileType(resting_pos);
        if (isWalkable(tt))
            break;
        --resting_pos.z;
    }

    return resting_pos;
}

static void create_boulders(color_ostream &out,
                const item_coords_t &item_coords,