初始动作 acquire_position_init

• 动作主体：车辆vehicle或行人pedestrian
• 结束时间：当动作主体actor 获取目标位置position 时，动作结束.

• 是否支持modifier：否
• 参数表： 参数如下表，pose_3d是point和orientation的组合结构， point可以使用xyz_point或 odr_point或road_point中的任意一个，orientation非必选项.

• 目标位置必须在地图设定的道路上，且是可达的.

xyz_point，有方向要求

m_x: length = 0.0m
m_xyz: xyz_point = map.create_xyz_point(x: m_x, y: 10.0m ,z: 0.0m)
m_heading: angle = 1.57rad
m_orientation: orientation_3d with:
    keep(it.roll == 0.0rad)
    keep(it.pitch == 0.0rad)
    keep(it.yaw == m_heading)
m_position: pose_3d with:
    keep(it.xyz_point == m_xyz)
    keep(it.orientation == m_orientation)
Ego.acquire_position_init(target: m_position)

odr_point，无方向要求

m_odr: odr_point = map.create_odr_point(road_id: '0', lane_id: '-4', s: 5.0m, t: 0.0m)
m_position: pose_3d with:
    keep(it.odr_point == m_odr)
Ego.acquire_position_init(target: m_position)

road_point，无方向要求

m_road: road_point = map.create_road_point(road_id: '0', s: 5.0m, t: 0.0m)
m_position: pose_3d with:
    keep(it.road_point == m_road)
Ego.acquire_position_init(target: m_position)