参数声明(Parameter Declarations)
参数声明格式为“参数名: 参数类型”,可以使用“=”为参数赋值,例如“m_distance: length = 10.0m”。
无论是具体场景还是逻辑场景,都不要对一个参数重复赋值。
具体场景(Concrete scenario)
具体场景的参数声明支持基础类型、标量(scalar)类型、枚举(enum)类型,和结构(struct)类型:
- 基础类型包含int、float、bool,和string类型。可以直接在等号后赋值。
- scalar类型包含speed、acceleration、length、time,和angle类型。赋值时需要在值后加上OSC2.0支持的单位(见附录Scalar units)。
- enum类型包含side_left_right、distance_direction、distance_mode、 lane_change_side、 dynamics_shape和catalog。赋值时必须使用枚举列表内的值(见附录Enum list) 。
- struct类型包含odr_point、xyz_point、position_3d、road_point、orientation_3d和pose_3d等,可以使用keep创建。此外,odr_point、xyz_point,和road_point分别可以使用map的成员函数create_odr_point 、 create_xyz_point和create_road_point来创建(OSC2.0支持的struct类型详见附录Struct)。
- 给bool型赋值时必须使用“true”和“false”,如果使用“True”或“False”或拼写错误将使语句无效。
例1:基础类型
m_road_id: string = '0' Ego_name: string = "Audi_A3_2009_black" m_lateral: bool = true
例2:scalar类型
v: speed = 5mps delay: time = 40s distance: length = 30.0m m_a: acceleration = 0.01mpss
例3:enum类型
m_side: side_left_right = right m_direction: distance_direction = longitudinal
例4:struct类型,keep创建
my_odr: odr_point with: keep(it.road_id == 0) keep(it.lane_id == -1) keep(it.s == 3.0m) keep(it.t == 0.0m) my_pos: position_3d with: keep(it.x == 1.0m) keep(it.y == 2.0m) keep(it.z == 3.0m) my_xyz: xyz_point with: keep(it.position == my_pos) my_road: road_point with: keep(it.road_id == '1') keep(it.s == 3.0m) keep(it.t == 0.0m) my_orientation: orientation_3d with: keep(it.roll == 1.0rad) keep(it.pitch == 2.0rad) keep(it.yaw == 3.0rad) my_pose: pose_3d with: keep(it.xyz_point == my_xyz) keep(it.orientation == m_orientation) m_trajectory: trajectory with: keep(it.points == [my_pose1, my_pose2, my_pose3]) keep(it.time_stamps == [0s, 5s, 20s] )
例5:struct类型,map创建
my_odr: odr_point = map.create_odr_point(road_id: m_road_id,lane_id:'-4',s: 5.0m, t: 0.0m) my_xyz: xyz_point = map.create_xyz_point(x: 2.5m, y: 10.0m ,z: 0.0m) my_point: road_point = map.create_road_point(road_id: '1', s: 5.0m, t: 0.0m)
逻辑场景(Logical scenario)
逻辑场景的参数声明通过:范围型[最小值..最大值] 和枚举型[值1, 值2] 的方式来实现泛化:
- 范围型支持float和scalar类型。
- 枚举型支持int, float, bool, str, enum和scalar类型,且需要保证枚举列表中的元素均为相同类型。
例1:范围型
m_value: float = [2.0..3.0] v: speed = [5mps..10mps] delay: time = [40s..60s] m_a: acceleration = [0.00mpss..0.03mpss]
例2:枚举型
m_ id: int = [-1, 2] m_value: float = [2.0, 3.0] m_on_road: bool = [true, false] Ego_name: string = ["Audi_A3_2009_black", "Audi_A3_2009_red"] m_shape: dynamics_shape = [linear, sinusoidal] m_side: side_left_right = [left, right] v: speed = [5mps, 7mps, 10mps] m_a: acceleration = [0.01mpss, 0.03mpss] delay: time = [40s, 60s, 100s]
- 通过泛化参数,可以实现实体entity 、动作act ,以及修饰器modifier的泛化。
- Struct类型不能直接泛化,而是通过泛化参数来进行泛化。
例1:entity泛化
Ego_name: string = ["Audi_A3_2009_black", "Audi_A3_2009_red"] Ego_controller: string = "DefaultDriver" Ego: vehicle with: keep(it.name == Ego_name) keep(it.initial_bm == Ego_controller)
例2:act泛化
m_lateral: bool = [true, false] m_speed: speed = [5mps..15mps] m_rate_profile: dynamics_shape = linear Ego.activate_controller(m_lateral, true) Ego.change_speed(target: m_speed, rate_peak: 0.0mpss, rate_profile: m_rate_profile)
例3:modifier泛化
m_speed: speed = [5mps..15mps] Ego.assign_init_speed() with: speed(speed: m_speed)
例4:Struct类型泛化
m_lane_id: int = [-1, 2] m_odr: odr_point = map.create_odr_point(road_id: '0', lane_id:m_lane_id, s: 5.0m, t: 0.0m) m_x: distance = [2m..7.5m] m_position_3d: position_3d = map.create_xyz_point(x: m_x, y: 10.0m ,z: 0.0m) m_pose_3d: pose_3d with: keep(it.odr_point == m_odr)