1026 lines
43 KiB
Python
1026 lines
43 KiB
Python
#!/usr/bin/env python3
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# -*- coding: UTF-8 -*-
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###########################################################################
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# Copyright © 1998 - 2026 Tencent. All Rights Reserved.
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###########################################################################
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"""
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Author: Tencent AI Arena Authors
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Feature preprocessor for Robot Vacuum.
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清扫大作战特征预处理器。
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"""
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from collections import deque
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import numpy as np
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def _norm(v, v_max, v_min=0.0):
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"""Normalize value to [0, 1].
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将值线性归一化到 [0, 1]。
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"""
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v = float(np.clip(v, v_min, v_max))
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if v_max == v_min:
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return 0.0
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return (v - v_min) / (v_max - v_min)
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def _signed_norm(v, v_max):
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"""Normalize signed value to [-1, 1]."""
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if v_max <= 0:
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return 0.0
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return float(np.clip(float(v) / float(v_max), -1.0, 1.0))
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def _as_dict(value):
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"""Return a dict for optional nested observation fields."""
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return value if isinstance(value, dict) else {}
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class Preprocessor:
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"""Feature preprocessor for Robot Vacuum.
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清扫大作战特征预处理器。
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"""
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GRID_SIZE = 128
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VIEW_HALF = 10 # Full local view radius (21×21) / 完整局部视野半径
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LOCAL_HALF = 5 # Cropped view radius (11×11) / 裁剪后的视野半径
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ACTION_DIRS = (
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(1, 0),
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(1, -1),
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(0, -1),
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(-1, -1),
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(-1, 0),
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(-1, 1),
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(0, 1),
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(1, 1),
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)
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INF_DIST = 1e6
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ABS_POS_FEATURE_SCALE = 0.2
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def __init__(self):
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self.reset()
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def reset(self):
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"""Reset all internal state at episode start.
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对局开始时重置所有状态。
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"""
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self.step_no = 0
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self.battery = 600
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self.battery_max = 600
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self.cur_pos = (0, 0)
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self.prev_pos = None
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self.has_position_history = False
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self.current_visit_count = 0
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self.is_new_cell = False
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self.last_action = -1
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self.stuck_steps = 0
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self.recharge_no_progress_steps = 0
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self.fake_charger_steps = 0
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self.stuck_count = 0
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self.max_stuck_steps = 0
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self.recharge_escape_count = 0
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self.dirt_cleaned = 0
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self.last_dirt_cleaned = 0
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self.total_dirt = 1
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self.total_score = 0
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self.clean_score = 0
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self.step_cleaned_count = 0
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self.max_step = 1000
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# Global passable map (0=obstacle, 1=passable), indexed by [x, z].
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# 维护全局通行地图（0=障碍, 1=可通行），索引为 [x, z]。
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self.passable_map = np.ones((self.GRID_SIZE, self.GRID_SIZE), dtype=np.int8)
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# Nearest dirt path distance in the current local view.
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# 当前局部视野内最近污渍路径距离。
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self.nearest_dirt_dist = 200.0
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self.last_nearest_dirt_dist = 200.0
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self.visit_count_map = np.zeros((self.GRID_SIZE, self.GRID_SIZE), dtype=np.uint16)
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self._view_map = np.zeros((21, 21), dtype=np.float32)
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self._legal_act = [1] * 8
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self.terminated = False
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self.truncated = False
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self.remaining_charge = 0
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self.prev_battery = 600
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self.prev_battery_max = 600
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self.prev_on_charger = False
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self.prev_low_battery = False
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self.was_recharge_mode = False
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self.charge_count = 0
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self.last_charge_count = 0
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self.charge_delta = 0
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self.nearest_charger_dx = 0.0
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self.nearest_charger_dz = 0.0
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self.nearest_charger_center_dx = 0.0
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self.nearest_charger_center_dz = 0.0
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self.nearest_charger_dist = float(self.GRID_SIZE)
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self.nearest_charger_range_dist = float(self.GRID_SIZE)
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self.last_nearest_charger_range_dist = float(self.GRID_SIZE)
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self.nearest_charger_path_dist = float(self.GRID_SIZE)
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self.last_nearest_charger_path_dist = float(self.GRID_SIZE)
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self.charger_energy_cost = float(self.GRID_SIZE)
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self.charger_safety_buffer = 0.0
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self.charger_safety_margin = 0.0
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self.recharge_enter_margin = 0.0
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self.recharge_leave_margin = 0.0
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self.recharge_low_battery_ratio = 0.35
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self.full_charge_leave_ratio = 0.96
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self.battery_margin = 0.0
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self.has_charger = False
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self.low_battery = False
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self.on_charger = False
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self.charger_rects = []
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self.recharge_mode = False
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self.recharge_steps = 0
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self.nearest_npc_dx = 0.0
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self.nearest_npc_dz = 0.0
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self.nearest_npc_dist = float(self.GRID_SIZE)
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self.npc_danger = False
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self.npcs = []
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self.npc_close_steps = 0
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self.npc_danger_steps = 0
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self.npc_collision = 0
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self.battery_fail = 0
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self.local_dirt_ratio = 0.0
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self.local_obstacle_ratio = 0.0
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def pb2struct(self, env_obs, last_action):
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"""Parse and cache essential fields from observation dict.
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从 env_obs 字典中提取并缓存所有需要的状态量。
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"""
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env_obs = _as_dict(env_obs)
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observation = _as_dict(env_obs.get("observation"))
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frame_state = _as_dict(observation.get("frame_state"))
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extra_info = _as_dict(env_obs.get("extra_info"))
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extra_frame_state = _as_dict(extra_info.get("frame_state"))
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env_info = _as_dict(observation.get("env_info"))
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hero = frame_state.get("heroes") or {}
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if isinstance(hero, list):
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hero = hero[0] if hero else {}
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hero = _as_dict(hero)
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self.last_action = int(last_action)
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self.step_no = int(observation.get("step_no", env_info.get("step_no", self.step_no)))
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self.terminated = bool(env_obs.get("terminated", False))
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self.truncated = bool(env_obs.get("truncated", False))
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self.prev_battery = self.battery
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self.prev_battery_max = self.battery_max
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self.prev_on_charger = self.on_charger
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self.prev_low_battery = self.low_battery
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self.was_recharge_mode = self.recharge_mode
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self.prev_pos = self.cur_pos if self.has_position_history else None
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hero_pos = _as_dict(hero.get("pos") or env_info.get("pos") or {"x": self.cur_pos[0], "z": self.cur_pos[1]})
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self.cur_pos = (int(hero_pos.get("x", self.cur_pos[0])), int(hero_pos.get("z", self.cur_pos[1])))
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self.has_position_history = True
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hx, hz = self.cur_pos
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if 0 <= hx < self.GRID_SIZE and 0 <= hz < self.GRID_SIZE:
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self.current_visit_count = int(self.visit_count_map[hx, hz])
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self.is_new_cell = self.current_visit_count == 0
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self.visit_count_map[hx, hz] = min(self.current_visit_count + 1, np.iinfo(np.uint16).max)
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else:
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self.current_visit_count = 0
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self.is_new_cell = False
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# Battery / 电量
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self.battery = int(hero.get("battery", env_info.get("remaining_charge", self.battery)))
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self.battery_max = max(int(hero.get("battery_max", env_info.get("battery_max", self.battery_max))), 1)
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self.remaining_charge = int(env_info.get("remaining_charge", self.battery))
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self.max_step = max(int(env_info.get("max_step", self.max_step)), 1)
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# Cleaning progress / 清扫进度
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self.last_dirt_cleaned = self.dirt_cleaned
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self.dirt_cleaned = int(hero.get("dirt_cleaned", env_info.get("clean_score", self.dirt_cleaned)))
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self.total_dirt = max(int(env_info.get("total_dirt", self.total_dirt)), 1)
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self.total_score = int(env_info.get("total_score", self.total_score))
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self.clean_score = int(env_info.get("clean_score", self.dirt_cleaned))
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step_cleaned_cells = env_info.get("step_cleaned_cells") or []
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self.step_cleaned_count = len(step_cleaned_cells)
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# Charge progress / 充电进度
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self.last_charge_count = self.charge_count
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self.charge_count = int(env_info.get("charge_count", self.charge_count))
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self.charge_delta = max(0, self.charge_count - self.last_charge_count)
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# Legal actions / 合法动作
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raw_legal_act = observation.get("legal_action") or observation.get("legal_act") or [1] * 8
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self._legal_act = [int(x) for x in raw_legal_act[:8]]
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if len(self._legal_act) < 8:
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self._legal_act.extend([1] * (8 - len(self._legal_act)))
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# Local view map (21×21) / 局部视野地图
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map_info = observation.get("map_info")
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if map_info is not None:
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self._view_map = np.array(map_info, dtype=np.float32)
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hx, hz = self.cur_pos
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self._update_passable(hx, hz)
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self._update_local_map_stats()
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organs = frame_state.get("organs") or extra_frame_state.get("organs") or []
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npcs = frame_state.get("npcs") or extra_frame_state.get("npcs") or []
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organs = organs if isinstance(organs, (list, tuple)) else []
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self.npcs = list(npcs) if isinstance(npcs, (list, tuple)) else []
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self._update_charger_state(hx, hz, organs)
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self._update_npc_state(hx, hz, self.npcs)
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self._update_recharge_mode()
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self._update_motion_health()
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def _update_passable(self, hx, hz):
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"""Write local view into global passable map.
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将局部视野写入全局通行地图。
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"""
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view = self._view_map
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vsize = view.shape[0]
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half = vsize // 2
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for ri in range(vsize):
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for ci in range(vsize):
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gx = hx + ci - half
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gz = hz + ri - half
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if 0 <= gx < self.GRID_SIZE and 0 <= gz < self.GRID_SIZE:
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# 0 = obstacle, 1/2 = passable
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# 0 = 障碍, 1/2 = 可通行
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self.passable_map[gx, gz] = 1 if view[ri, ci] != 0 else 0
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def _view_index_to_global(self, ri, ci):
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"""Convert local view row/col to global x/z coordinates."""
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half = self._view_map.shape[0] // 2
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hx, hz = self.cur_pos
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return hx + ci - half, hz + ri - half
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def _view_delta_to_index(self, dx, dz):
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"""Convert global-coordinate dx/dz to local view row/col."""
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return self.VIEW_HALF + dz, self.VIEW_HALF + dx
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def _view_cell(self, dx, dz, default=None):
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"""Read a local-view cell by global-coordinate delta.
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`map_info` is row-major: row follows z/down, col follows x/right.
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"""
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ri, ci = self._view_delta_to_index(dx, dz)
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if not (0 <= ri < self._view_map.shape[0] and 0 <= ci < self._view_map.shape[1]):
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return default
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return int(self._view_map[ri, ci])
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def _update_local_map_stats(self):
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"""Cache coarse 21x21 map statistics."""
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view = self._view_map
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if view is None or view.size == 0:
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self.local_dirt_ratio = 0.0
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self.local_obstacle_ratio = 0.0
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return
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total = float(view.size)
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self.local_dirt_ratio = float(np.sum(view == 2) / total)
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self.local_obstacle_ratio = float(np.sum(view == 0) / total)
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def _update_charger_state(self, hx, hz, organs):
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"""Find nearest charger and cache distance/direction features."""
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self.last_nearest_charger_range_dist = self.nearest_charger_range_dist
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self.last_nearest_charger_path_dist = self.nearest_charger_path_dist
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self.has_charger = False
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self.on_charger = False
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self.nearest_charger_dx = 0.0
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self.nearest_charger_dz = 0.0
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self.nearest_charger_center_dx = 0.0
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self.nearest_charger_center_dz = 0.0
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self.nearest_charger_dist = float(self.GRID_SIZE)
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self.nearest_charger_range_dist = float(self.GRID_SIZE)
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self.nearest_charger_path_dist = float(self.GRID_SIZE)
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self.charger_energy_cost = float(self.GRID_SIZE)
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self.charger_safety_buffer = 0.0
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self.charger_safety_margin = 0.0
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self.charger_rects = []
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best = None
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for organ in organs:
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if not isinstance(organ, dict):
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continue
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if int(organ.get("sub_type", 1)) != 1:
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continue
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pos = organ.get("pos") or {}
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ox = int(pos.get("x", 0))
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oz = int(pos.get("z", 0))
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w = max(int(organ.get("w", 3)), 1)
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h = max(int(organ.get("h", 3)), 1)
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for rx, rz in ((ox, oz), (ox - w // 2, oz - h // 2)):
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self.charger_rects.append((rx, rz, w, h))
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dx, dz = self._relative_vector_to_rect(hx, hz, rx, rz, w, h)
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dist = float(np.sqrt(dx * dx + dz * dz))
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range_dist = float(max(abs(dx), abs(dz)))
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center_dx = (rx + (w - 1) * 0.5) - hx
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center_dz = (rz + (h - 1) * 0.5) - hz
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if best is None or range_dist < best[0] or (range_dist == best[0] and dist < best[1]):
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best = (range_dist, dist, dx, dz, center_dx, center_dz)
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if best is None:
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self.battery_margin = float(self.battery)
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self.charger_safety_margin = float(self.battery)
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return
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range_dist, dist, dx, dz, center_dx, center_dz = best
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self.has_charger = True
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self.nearest_charger_dx = float(dx)
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self.nearest_charger_dz = float(dz)
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self.nearest_charger_center_dx = float(center_dx)
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self.nearest_charger_center_dz = float(center_dz)
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self.nearest_charger_dist = float(dist)
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self.nearest_charger_range_dist = float(range_dist)
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path_dist = self._local_path_dist_to_charger(hx, hz)
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self.nearest_charger_path_dist = float(path_dist if path_dist < self.INF_DIST else range_dist)
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self.charger_energy_cost = self.nearest_charger_path_dist
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self.on_charger = range_dist <= 0.0
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self.battery_margin = float(self.battery) - self.nearest_charger_path_dist
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def _relative_vector_to_rect(self, x, z, rx, rz, w, h):
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"""Relative vector from point to the nearest cell in a rectangle."""
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if x < rx:
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dx = rx - x
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elif x > rx + w - 1:
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dx = x - (rx + w - 1)
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else:
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dx = 0
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if z < rz:
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dz = rz - z
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elif z > rz + h - 1:
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dz = z - (rz + h - 1)
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else:
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dz = 0
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return float(dx), float(dz)
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def _update_npc_state(self, hx, hz, npcs):
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"""Find nearest NPC and cache safety features."""
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self.nearest_npc_dx = 0.0
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self.nearest_npc_dz = 0.0
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self.nearest_npc_dist = float(self.GRID_SIZE)
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self.npc_danger = False
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best = None
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for npc in npcs:
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if not isinstance(npc, dict):
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continue
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pos = npc.get("pos") or {}
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nx = int(pos.get("x", 0))
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nz = int(pos.get("z", 0))
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dx = nx - hx
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dz = nz - hz
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cheb = float(max(abs(dx), abs(dz)))
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if best is None or cheb < best[0]:
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best = (cheb, dx, dz)
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if best is None:
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return
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cheb, dx, dz = best
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self.nearest_npc_dx = float(dx)
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self.nearest_npc_dz = float(dz)
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self.nearest_npc_dist = float(cheb)
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self.npc_danger = abs(dx) <= 1 and abs(dz) <= 1
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def _update_recharge_mode(self):
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"""Enter/exit low-battery recharge mode."""
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battery_ratio = self.battery / max(self.battery_max, 1)
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if not self.has_charger:
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self.recharge_mode = False
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self.charger_safety_margin = float(self.battery)
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self.recharge_enter_margin = 0.0
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self.recharge_leave_margin = 0.0
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self.recharge_low_battery_ratio = 0.35
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self.full_charge_leave_ratio = 0.96
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self.low_battery = battery_ratio < self.recharge_low_battery_ratio
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return
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self.charger_energy_cost = float(max(self.nearest_charger_path_dist, 0.0))
|
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self.charger_safety_buffer = self._charger_safety_buffer()
|
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self.charger_safety_margin = float(self.battery) - self.charger_energy_cost - self.charger_safety_buffer
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self.recharge_enter_margin = self._recharge_enter_margin()
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self.recharge_leave_margin = self._recharge_leave_margin()
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self.recharge_low_battery_ratio = self._recharge_low_battery_ratio()
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self.full_charge_leave_ratio = self._full_charge_leave_ratio()
|
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self.low_battery = battery_ratio < self.recharge_low_battery_ratio
|
||
should_recharge = self.charger_safety_margin <= self.recharge_enter_margin or self.low_battery
|
||
safe_to_leave = (
|
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battery_ratio >= self.full_charge_leave_ratio
|
||
and self.charger_safety_margin >= self.recharge_leave_margin
|
||
)
|
||
|
||
if self.on_charger and safe_to_leave:
|
||
self.recharge_mode = False
|
||
elif should_recharge:
|
||
self.recharge_mode = True
|
||
elif self.recharge_mode and not safe_to_leave:
|
||
self.recharge_mode = True
|
||
else:
|
||
self.recharge_mode = False
|
||
|
||
if self.recharge_mode:
|
||
self.recharge_steps += 1
|
||
|
||
def _update_motion_health(self):
|
||
"""Track recharge-mode stalls so action masking can recover."""
|
||
if self.prev_pos is not None and self.cur_pos == self.prev_pos and 0 <= self.last_action < 8:
|
||
if self.charge_delta <= 0:
|
||
self.stuck_steps += 1
|
||
self.stuck_count += 1
|
||
self.max_stuck_steps = max(self.max_stuck_steps, self.stuck_steps)
|
||
else:
|
||
self.stuck_steps = 0
|
||
else:
|
||
self.stuck_steps = 0
|
||
|
||
battery_ratio = self.battery / max(self.battery_max, 1)
|
||
battery_increased = self.battery > self.prev_battery + 1
|
||
maybe_fake_charger = self.on_charger and battery_ratio < 0.9 and self.charge_delta <= 0 and not battery_increased
|
||
self.fake_charger_steps = self.fake_charger_steps + 1 if maybe_fake_charger else 0
|
||
|
||
no_progress = (
|
||
self.recharge_mode
|
||
and self.has_charger
|
||
and self.charge_delta <= 0
|
||
and not battery_increased
|
||
and self.nearest_charger_path_dist >= self.last_nearest_charger_path_dist - 0.1
|
||
)
|
||
self.recharge_no_progress_steps = self.recharge_no_progress_steps + 1 if no_progress else 0
|
||
|
||
if self.step_no > 0 and self.nearest_npc_dist <= 3:
|
||
self.npc_close_steps += 1
|
||
if self.step_no > 0 and self.npc_danger:
|
||
self.npc_danger_steps += 1
|
||
|
||
if self.terminated and not self.truncated:
|
||
if self.battery <= 0 or self.remaining_charge <= 0:
|
||
self.battery_fail = 1
|
||
if self.npc_danger or self.nearest_npc_dist <= 1:
|
||
self.npc_collision = 1
|
||
|
||
def _need_recharge_escape(self):
|
||
return self.stuck_steps >= 2 or self.recharge_no_progress_steps >= 5 or self.fake_charger_steps >= 2
|
||
|
||
def _charger_safety_buffer(self):
|
||
# One move roughly costs one charge; reserve extra for detours, local obstacles, and policy noise.
|
||
base = max(24.0, 0.16 * float(self.battery_max))
|
||
distance_buffer = min(24.0, 0.25 * float(max(self.nearest_charger_range_dist, 0.0)))
|
||
obstacle_buffer = 18.0 * float(self.local_obstacle_ratio)
|
||
return float(np.clip(base + distance_buffer + obstacle_buffer, 24.0, 64.0))
|
||
|
||
def _recharge_enter_margin(self):
|
||
"""Adaptive margin for entering recharge mode before the battery is barely enough."""
|
||
base = max(8.0, 0.025 * float(self.battery_max))
|
||
path_margin = min(18.0, 0.12 * float(max(self.nearest_charger_path_dist, 0.0)))
|
||
obstacle_margin = 20.0 * float(self.local_obstacle_ratio)
|
||
recovery_margin = min(10.0, 2.0 * float(self.recharge_no_progress_steps + self.fake_charger_steps))
|
||
return float(np.clip(base + path_margin + obstacle_margin + recovery_margin, 8.0, 48.0))
|
||
|
||
def _recharge_leave_margin(self):
|
||
"""Adaptive safety margin required before leaving a charger."""
|
||
base = max(28.0, 0.10 * float(self.battery_max))
|
||
path_margin = min(24.0, 0.18 * float(max(self.nearest_charger_path_dist, 0.0)))
|
||
obstacle_margin = 16.0 * float(self.local_obstacle_ratio)
|
||
return float(np.clip(base + path_margin + obstacle_margin, 28.0, 88.0))
|
||
|
||
def _recharge_low_battery_ratio(self):
|
||
"""Adaptive low-battery ratio based on route length and local obstacle density."""
|
||
path_pressure = float(max(self.nearest_charger_path_dist, 0.0)) / max(float(self.battery_max), 1.0)
|
||
ratio = 0.32 + min(0.10, 0.55 * path_pressure) + min(0.06, 0.20 * float(self.local_obstacle_ratio))
|
||
if self.recharge_no_progress_steps > 0 or self.fake_charger_steps > 0:
|
||
ratio += 0.03
|
||
return float(np.clip(ratio, 0.32, 0.48))
|
||
|
||
def _full_charge_leave_ratio(self):
|
||
"""Adaptive near-full threshold for leaving a charger."""
|
||
remaining_step_ratio = 1.0 - _norm(self.step_no, self.max_step)
|
||
path_pressure = float(max(self.nearest_charger_path_dist, 0.0)) / max(float(self.battery_max), 1.0)
|
||
ratio = 0.94 + 0.03 * remaining_step_ratio + min(0.02, 0.10 * path_pressure)
|
||
ratio += min(0.01, 0.05 * float(self.local_obstacle_ratio))
|
||
return float(np.clip(ratio, 0.94, 0.985))
|
||
|
||
def _recharge_risk_score(self):
|
||
"""Risk score in [0, 1] used to scale recharge rewards and penalties."""
|
||
if not self.has_charger:
|
||
return 0.0
|
||
battery_ratio = self.battery / max(self.battery_max, 1)
|
||
margin_deficit = max(0.0, self.recharge_enter_margin - self.charger_safety_margin)
|
||
margin_risk = margin_deficit / max(self.charger_safety_buffer + self.recharge_enter_margin, 1.0)
|
||
low_battery_risk = max(0.0, self.recharge_low_battery_ratio - battery_ratio)
|
||
low_battery_risk /= max(self.recharge_low_battery_ratio, 1e-6)
|
||
progress_risk = min(1.0, float(self.recharge_no_progress_steps) / 5.0)
|
||
return float(np.clip(0.55 * margin_risk + 0.35 * low_battery_risk + 0.10 * progress_risk, 0.0, 1.0))
|
||
|
||
def useful_charge_reward_weight(self):
|
||
"""Adaptive reward weight for charging that happens under real battery pressure."""
|
||
prev_battery_ratio = self.prev_battery / max(self.prev_battery_max, 1)
|
||
prev_low_risk = max(0.0, self.recharge_low_battery_ratio - prev_battery_ratio)
|
||
prev_low_risk /= max(self.recharge_low_battery_ratio, 1e-6)
|
||
risk = max(self._recharge_risk_score(), prev_low_risk)
|
||
mode_bonus = 0.25 if self.was_recharge_mode or self.prev_low_battery else 0.0
|
||
return float(np.clip(1.2 + 1.1 * risk + mode_bonus, 1.2, 2.6))
|
||
|
||
def battery_fail_penalty(self):
|
||
"""Adaptive terminal penalty for running out of battery before max steps."""
|
||
step_ratio = _norm(self.step_no, self.max_step)
|
||
early_fail_risk = 1.0 - step_ratio
|
||
path_pressure = float(max(self.charger_energy_cost, 0.0)) / max(float(self.battery_max), 1.0)
|
||
risk = max(self._recharge_risk_score(), min(1.0, path_pressure))
|
||
return float(np.clip(5.5 + 2.5 * early_fail_risk + 1.0 * risk, 5.5, 9.0))
|
||
|
||
def _min_charger_range_dist(self, x, z):
|
||
if not self.charger_rects:
|
||
return float(self.GRID_SIZE)
|
||
dists = []
|
||
for rx, rz, w, h in self.charger_rects:
|
||
dx, dz = self._relative_vector_to_rect(x, z, rx, rz, w, h)
|
||
dists.append(max(abs(dx), abs(dz)))
|
||
return float(min(dists))
|
||
|
||
def _get_local_view_feature(self):
|
||
"""Local view feature (121D): crop center 11×11 from 21×21.
|
||
|
||
局部视野特征（121D）：从 21×21 视野中心裁剪 11×11。
|
||
"""
|
||
center = self.VIEW_HALF
|
||
h = self.LOCAL_HALF
|
||
crop = self._view_map[center - h : center + h + 1, center - h : center + h + 1]
|
||
return (crop / 2.0).flatten()
|
||
|
||
def _get_global_state_feature(self):
|
||
"""Global state feature (28D).
|
||
|
||
全局状态特征（28D）。
|
||
|
||
Dimensions / 维度说明：
|
||
[0] step_norm step progress / 步数归一化 [0,1]
|
||
[1] battery_ratio battery level / 电量比 [0,1]
|
||
[2] cleaning_progress cleaned ratio / 已清扫比例 [0,1]
|
||
[3] remaining_dirt remaining dirt ratio / 剩余污渍比例 [0,1]
|
||
[4] pos_x_weak weak x position / 弱化后的 x 坐标 [0.4,0.6]
|
||
[5] pos_z_weak weak z position / 弱化后的 z 坐标 [0.4,0.6]
|
||
[6] ray_N_dirt north ray distance / 向上（z-）方向最近污渍距离
|
||
[7] ray_E_dirt east ray distance / 向右（x+）方向
|
||
[8] ray_S_dirt south ray distance / 向下（z+）方向
|
||
[9] ray_W_dirt west ray distance / 向左（x-）方向
|
||
[10] nearest_dirt_norm nearest dirt Euclidean distance / 最近污渍欧氏距离归一化
|
||
[11] dirt_delta approaching dirt indicator / 是否在接近污渍（1=是, 0=否）
|
||
[12] charger_dx nearest charger x direction / 最近充电桩 x 相对方向
|
||
[13] charger_dz nearest charger z direction / 最近充电桩 z 相对方向
|
||
[14] charger_dist nearest charger distance / 最近充电桩距离
|
||
[15] battery_margin battery minus charger distance / 电量安全余量
|
||
[16] low_battery low-battery flag / 低电量标记
|
||
[17] recharge_mode recharge-mode flag / 回充模式标记
|
||
[18] on_charger on charger flag / 是否在充电桩范围
|
||
[19] charge_delta charge count increased / 本步是否成功充电
|
||
[20] npc_dx nearest NPC x direction / 最近 NPC x 相对方向
|
||
[21] npc_dz nearest NPC z direction / 最近 NPC z 相对方向
|
||
[22] npc_dist nearest NPC Chebyshev distance / 最近 NPC 切比雪夫距离
|
||
[23] npc_danger in NPC 3x3 danger zone / 是否处于 NPC 3x3 危险区
|
||
[24] local_dirt_ratio dirt ratio in 21x21 view / 21x21 视野污渍比例
|
||
[25] obstacle_ratio obstacle ratio in 21x21 view / 21x21 视野障碍比例
|
||
[26] visit_count current cell visit count / 当前格访问次数
|
||
[27] step_cleaned cells cleaned this step / 本步清扫格子数
|
||
"""
|
||
step_norm = _norm(self.step_no, self.max_step)
|
||
battery_ratio = _norm(self.battery, self.battery_max)
|
||
cleaning_progress = _norm(self.dirt_cleaned, self.total_dirt)
|
||
remaining_dirt = 1.0 - cleaning_progress
|
||
|
||
hx, hz = self.cur_pos
|
||
pos_x_weak = self._weak_abs_position_feature(hx)
|
||
pos_z_weak = self._weak_abs_position_feature(hz)
|
||
|
||
# 4-directional ray to find nearest dirt
|
||
# 四方向射线找最近污渍距离
|
||
ray_dirs = [(0, -1), (1, 0), (0, 1), (-1, 0)] # N E S W
|
||
ray_dirt = []
|
||
max_ray = 30
|
||
for dx, dz in ray_dirs:
|
||
found = max_ray
|
||
for step in range(1, max_ray + 1):
|
||
gx = hx + dx * step
|
||
gz = hz + dz * step
|
||
if not (0 <= gx < self.GRID_SIZE and 0 <= gz < self.GRID_SIZE):
|
||
break
|
||
cell = self._view_cell(dx * step, dz * step, default=0)
|
||
if cell == 2:
|
||
found = step
|
||
break
|
||
ray_dirt.append(_norm(found, max_ray))
|
||
|
||
# Nearest dirt path distance in the visible map.
|
||
# 视野内最近污渍路径距离。
|
||
self.last_nearest_dirt_dist = self.nearest_dirt_dist
|
||
self.nearest_dirt_dist = self._calc_nearest_dirt_dist()
|
||
nearest_dirt_norm = _norm(self.nearest_dirt_dist, 180)
|
||
|
||
dirt_delta = 1.0 if self.nearest_dirt_dist < self.last_nearest_dirt_dist else 0.0
|
||
charge_delta = 1.0 if self.charge_delta > 0 else 0.0
|
||
battery_margin_norm = _signed_norm(self.battery_margin, self.battery_max)
|
||
visit_count_norm = _norm(min(self.current_visit_count, 10), 10)
|
||
step_cleaned_norm = _norm(self.step_cleaned_count, 9)
|
||
|
||
return np.array(
|
||
[
|
||
step_norm,
|
||
battery_ratio,
|
||
cleaning_progress,
|
||
remaining_dirt,
|
||
pos_x_weak,
|
||
pos_z_weak,
|
||
ray_dirt[0],
|
||
ray_dirt[1],
|
||
ray_dirt[2],
|
||
ray_dirt[3],
|
||
nearest_dirt_norm,
|
||
dirt_delta,
|
||
_signed_norm(self.nearest_charger_dx, self.GRID_SIZE),
|
||
_signed_norm(self.nearest_charger_dz, self.GRID_SIZE),
|
||
_norm(self.nearest_charger_path_dist, self.GRID_SIZE),
|
||
battery_margin_norm,
|
||
1.0 if self.low_battery else 0.0,
|
||
1.0 if self.recharge_mode else 0.0,
|
||
1.0 if self.on_charger else 0.0,
|
||
charge_delta,
|
||
_signed_norm(self.nearest_npc_dx, 20),
|
||
_signed_norm(self.nearest_npc_dz, 20),
|
||
_norm(self.nearest_npc_dist, 20),
|
||
1.0 if self.npc_danger else 0.0,
|
||
self.local_dirt_ratio,
|
||
self.local_obstacle_ratio,
|
||
visit_count_norm,
|
||
step_cleaned_norm,
|
||
],
|
||
dtype=np.float32,
|
||
)
|
||
|
||
def _weak_abs_position_feature(self, value):
|
||
pos_norm = _norm(value, self.GRID_SIZE)
|
||
return 0.5 + self.ABS_POS_FEATURE_SCALE * (pos_norm - 0.5)
|
||
|
||
def _calc_nearest_dirt_dist(self):
|
||
"""Find nearest dirt path distance from local view.
|
||
|
||
从局部视野中找最近污渍路径距离。
|
||
"""
|
||
dist = self._local_bfs_distances()
|
||
dirt_coords = np.argwhere(self._view_map == 2)
|
||
if len(dirt_coords) == 0:
|
||
return 200.0
|
||
best = min(float(dist[ri, ci]) for ri, ci in dirt_coords)
|
||
if best >= self.INF_DIST:
|
||
return 200.0
|
||
return best
|
||
|
||
def _local_bfs_distances(self, start_dx=0, start_dz=0):
|
||
"""Shortest path distances inside the current 21x21 local view."""
|
||
view = self._view_map
|
||
shape = view.shape
|
||
dist = np.full(shape, self.INF_DIST, dtype=np.float32)
|
||
start_ri, start_ci = self._view_delta_to_index(start_dx, start_dz)
|
||
if not (0 <= start_ri < shape[0] and 0 <= start_ci < shape[1]):
|
||
return dist
|
||
if int(view[start_ri, start_ci]) == 0:
|
||
return dist
|
||
|
||
dist[start_ri, start_ci] = 0.0
|
||
queue = deque([(start_ri, start_ci)])
|
||
while queue:
|
||
ri, ci = queue.popleft()
|
||
base = dist[ri, ci]
|
||
for dx, dz in self.ACTION_DIRS:
|
||
nri = ri + dz
|
||
nci = ci + dx
|
||
if not (0 <= nri < shape[0] and 0 <= nci < shape[1]):
|
||
continue
|
||
if int(view[nri, nci]) == 0 or dist[nri, nci] < self.INF_DIST:
|
||
continue
|
||
if dx != 0 and dz != 0:
|
||
side_a = int(view[ri, nci]) != 0
|
||
side_b = int(view[nri, ci]) != 0
|
||
if not (side_a or side_b):
|
||
continue
|
||
dist[nri, nci] = base + 1.0
|
||
queue.append((nri, nci))
|
||
return dist
|
||
|
||
def _local_path_dist_to_charger(self, gx, gz):
|
||
"""Visible-map BFS distance from global x/z to nearest charger cell."""
|
||
best = self.INF_DIST
|
||
start_dx = gx - self.cur_pos[0]
|
||
start_dz = gz - self.cur_pos[1]
|
||
dist = self._local_bfs_distances(start_dx, start_dz)
|
||
for rx, rz, w, h in self.charger_rects:
|
||
for tx in range(rx, rx + w):
|
||
for tz in range(rz, rz + h):
|
||
dx = tx - self.cur_pos[0]
|
||
dz = tz - self.cur_pos[1]
|
||
ri, ci = self._view_delta_to_index(dx, dz)
|
||
if 0 <= ri < dist.shape[0] and 0 <= ci < dist.shape[1]:
|
||
best = min(best, float(dist[ri, ci]))
|
||
return best
|
||
|
||
def _charger_move_distance(self, gx, gz):
|
||
"""Use visible BFS to the charger when available, otherwise Chebyshev distance."""
|
||
path_dist = self._local_path_dist_to_charger(gx, gz)
|
||
if path_dist < self.INF_DIST:
|
||
return path_dist
|
||
return self._min_charger_range_dist(gx, gz)
|
||
|
||
def get_legal_action(self):
|
||
"""Return legal action mask (8D list).
|
||
|
||
返回合法动作掩码（8D list）。
|
||
"""
|
||
legal = self._filter_blocked_actions(self._legal_act)
|
||
legal = self._filter_npc_danger_actions(legal)
|
||
safe_legal = list(legal)
|
||
if self.recharge_mode:
|
||
legal = self._filter_recharge_actions(legal)
|
||
legal = self._filter_recharge_escape_actions(legal, safe_legal)
|
||
elif self.on_charger and self.battery / max(self.battery_max, 1) >= self.full_charge_leave_ratio:
|
||
legal = self._filter_leave_charger_actions(legal)
|
||
return list(legal)
|
||
|
||
def _filter_blocked_actions(self, legal_action):
|
||
"""Filter actions that are visibly blocked in the 21x21 view."""
|
||
legal = [int(x) for x in legal_action]
|
||
hx, hz = self.cur_pos
|
||
for action, (dx, dz) in enumerate(self.ACTION_DIRS):
|
||
if legal[action] <= 0:
|
||
continue
|
||
if not self._is_visible_cell_passable(dx, dz):
|
||
legal[action] = 0
|
||
continue
|
||
if dx != 0 and dz != 0:
|
||
side_a = self._is_visible_cell_passable(dx, 0)
|
||
side_b = self._is_visible_cell_passable(0, dz)
|
||
if not (side_a or side_b):
|
||
legal[action] = 0
|
||
nx, nz = hx + dx, hz + dz
|
||
if not (0 <= nx < self.GRID_SIZE and 0 <= nz < self.GRID_SIZE):
|
||
legal[action] = 0
|
||
|
||
return legal if any(legal) else [int(x) for x in legal_action]
|
||
|
||
def _is_visible_cell_passable(self, dx, dz):
|
||
"""Whether a relative 21x21-view cell is passable."""
|
||
cell = self._view_cell(dx, dz, default=None)
|
||
return True if cell is None else cell != 0
|
||
|
||
def _filter_npc_danger_actions(self, legal_action):
|
||
"""Avoid actions that would enter any NPC 3x3 danger zone."""
|
||
if not self.npcs:
|
||
return list(legal_action)
|
||
|
||
hx, hz = self.cur_pos
|
||
safe = [int(x) for x in legal_action]
|
||
for action, (dx, dz) in enumerate(self.ACTION_DIRS):
|
||
if safe[action] <= 0:
|
||
continue
|
||
nx, nz = hx + dx, hz + dz
|
||
if self._is_npc_danger_cell(nx, nz):
|
||
safe[action] = 0
|
||
|
||
return safe if any(safe) else list(legal_action)
|
||
|
||
def _is_npc_danger_cell(self, x, z):
|
||
for npc in self.npcs:
|
||
if not isinstance(npc, dict):
|
||
continue
|
||
pos = npc.get("pos") or {}
|
||
nx = int(pos.get("x", -999))
|
||
nz = int(pos.get("z", -999))
|
||
if abs(x - nx) <= 1 and abs(z - nz) <= 1:
|
||
return True
|
||
return False
|
||
|
||
def _filter_recharge_actions(self, legal_action):
|
||
"""Restrict recharge-mode actions to safe moves toward the charger range."""
|
||
if not self.has_charger:
|
||
return list(legal_action)
|
||
|
||
hx, hz = self.cur_pos
|
||
current_range_dist = self._min_charger_range_dist(hx, hz)
|
||
current_move_dist = self._charger_move_distance(hx, hz)
|
||
scored = []
|
||
for action, (dx, dz) in enumerate(self.ACTION_DIRS):
|
||
if legal_action[action] <= 0:
|
||
continue
|
||
nx, nz = hx + dx, hz + dz
|
||
next_dist = self._charger_move_distance(nx, nz)
|
||
alignment = dx * self.nearest_charger_dx + dz * self.nearest_charger_dz
|
||
next_range_dist = self._min_charger_range_dist(nx, nz)
|
||
scored.append((next_dist, alignment, next_range_dist, action))
|
||
|
||
if not scored:
|
||
return list(legal_action)
|
||
|
||
# When already inside the charger range, stay inside until recharge mode exits.
|
||
# 已经在充电区域内时，回充模式退出前不要离开充电区域。
|
||
confirmed_charger = self.charge_delta > 0 or self.battery > self.prev_battery + 1
|
||
if current_range_dist <= 0.0 and confirmed_charger:
|
||
stay = [0] * 8
|
||
for _, _, next_range_dist, action in scored:
|
||
if next_range_dist <= 0.0:
|
||
stay[action] = 1
|
||
if any(stay):
|
||
return stay
|
||
|
||
recharge = [0] * 8
|
||
best_next_dist = min(item[0] for item in scored)
|
||
ranked = sorted(scored, key=lambda item: (item[0], -item[1]))
|
||
for next_dist, _, _, action in ranked:
|
||
if next_dist <= best_next_dist + 2.0 and next_dist <= current_move_dist + 0.1:
|
||
recharge[action] = 1
|
||
if sum(recharge) >= 3:
|
||
break
|
||
|
||
if not any(recharge):
|
||
for _, _, _, action in ranked[: min(3, len(ranked))]:
|
||
recharge[action] = 1
|
||
|
||
return recharge if any(recharge) else list(legal_action)
|
||
|
||
def _filter_recharge_escape_actions(self, recharge_action, safe_action):
|
||
"""Escape repeated no-move states during low-battery recharge."""
|
||
if not self._need_recharge_escape():
|
||
return list(recharge_action)
|
||
|
||
hx, hz = self.cur_pos
|
||
current_dist = self._charger_move_distance(hx, hz)
|
||
ranked = []
|
||
for action, (dx, dz) in enumerate(self.ACTION_DIRS):
|
||
if safe_action[action] <= 0:
|
||
continue
|
||
nx, nz = hx + dx, hz + dz
|
||
next_dist = self._charger_move_distance(nx, nz)
|
||
visit_count = 0
|
||
if 0 <= nx < self.GRID_SIZE and 0 <= nz < self.GRID_SIZE:
|
||
visit_count = int(self.visit_count_map[nx, nz])
|
||
failed_action_penalty = 6.0 if action == self.last_action and self.stuck_steps >= 2 else 0.0
|
||
no_progress_penalty = 1.5 if next_dist > current_dist + 0.1 else 0.0
|
||
ranked.append((next_dist + 0.05 * min(visit_count, 20) + failed_action_penalty + no_progress_penalty, action))
|
||
|
||
if not ranked:
|
||
return list(recharge_action)
|
||
|
||
self.recharge_escape_count += 1
|
||
ranked.sort()
|
||
escape = [0] * 8
|
||
for _, action in ranked[: min(4, len(ranked))]:
|
||
escape[action] = 1
|
||
|
||
if self.stuck_steps >= 2 and sum(escape) > 1 and 0 <= self.last_action < 8:
|
||
escape[self.last_action] = 0
|
||
|
||
return escape if any(escape) else list(recharge_action)
|
||
|
||
def _filter_leave_charger_actions(self, legal_action):
|
||
"""Prefer moves that leave charger range when battery is healthy."""
|
||
if not self.has_charger:
|
||
return list(legal_action)
|
||
|
||
hx, hz = self.cur_pos
|
||
current_dist = self._min_charger_range_dist(hx, hz)
|
||
scored = []
|
||
for action, (dx, dz) in enumerate(self.ACTION_DIRS):
|
||
if legal_action[action] <= 0:
|
||
continue
|
||
nx, nz = hx + dx, hz + dz
|
||
next_dist = self._min_charger_range_dist(nx, nz)
|
||
away_score = -(dx * self.nearest_charger_center_dx + dz * self.nearest_charger_center_dz)
|
||
scored.append((next_dist - current_dist, away_score, action))
|
||
|
||
if not scored:
|
||
return list(legal_action)
|
||
|
||
best_escape = max(item[0] for item in scored)
|
||
leave = [0] * 8
|
||
if best_escape > 0:
|
||
for escape, _, action in scored:
|
||
if escape >= best_escape - 0.1:
|
||
leave[action] = 1
|
||
else:
|
||
best_away = max(item[1] for item in scored)
|
||
for _, away_score, action in scored:
|
||
if away_score >= best_away:
|
||
leave[action] = 1
|
||
|
||
return leave if any(leave) else list(legal_action)
|
||
|
||
def feature_process(self, env_obs, last_action):
|
||
"""Generate feature vector, legal action mask, and scalar reward.
|
||
|
||
生成特征向量、合法动作掩码和标量奖励。
|
||
"""
|
||
self.pb2struct(env_obs, last_action)
|
||
|
||
local_view = self._get_local_view_feature() # 121D
|
||
global_state = self._get_global_state_feature() # 28D
|
||
legal_action = self.get_legal_action() # 8D
|
||
|
||
last_action_feature = np.zeros(8, dtype=np.float32)
|
||
if 0 <= last_action < 8:
|
||
last_action_feature[last_action] = 1.0
|
||
|
||
feature = np.concatenate([local_view, global_state, last_action_feature])
|
||
|
||
reward = self.reward_process()
|
||
|
||
return feature, legal_action, reward
|
||
|
||
def reward_process(self):
|
||
# Cleaning reward / 清扫奖励
|
||
cleaned_this_step = max(0, self.dirt_cleaned - self.last_dirt_cleaned)
|
||
cleaned_cells = self.step_cleaned_count if self.step_cleaned_count > 0 else cleaned_this_step
|
||
cleaning_scale = 0.2 if self.recharge_mode else 0.7
|
||
cleaning_reward = cleaning_scale * cleaned_cells
|
||
|
||
# Step penalty / 时间惩罚
|
||
step_penalty = -0.002
|
||
|
||
# Dense guidance: prefer moving toward visible dirt.
|
||
# 稠密引导：鼓励向视野内污渍靠近。
|
||
approach_reward = 0.0
|
||
if not self.recharge_mode and (self.last_nearest_dirt_dist < 200.0 or self.nearest_dirt_dist < 200.0):
|
||
dist_delta = float(np.clip(self.last_nearest_dirt_dist - self.nearest_dirt_dist, -5.0, 5.0))
|
||
approach_reward = 0.01 * dist_delta if dist_delta > 0 else 0.006 * dist_delta
|
||
|
||
# Recharge guidance only activates when battery safety is the bottleneck.
|
||
# 仅在低电量/回充模式下引导靠近充电桩，避免高电量蹲充电桩。
|
||
charge_reward = 0.0
|
||
battery_ratio = self.battery / max(self.battery_max, 1)
|
||
prev_battery_ratio = self.prev_battery / max(self.prev_battery_max, 1)
|
||
useful_charge = self.charge_delta > 0 and (
|
||
self.prev_low_battery or self.was_recharge_mode or prev_battery_ratio < 0.45
|
||
)
|
||
if useful_charge:
|
||
charge_reward += self.useful_charge_reward_weight()
|
||
elif self.charge_delta > 0 and battery_ratio > 0.65:
|
||
charge_reward -= 0.25 * min(self.charge_delta, 3)
|
||
|
||
if self.has_charger and (self.recharge_mode or self.low_battery):
|
||
dist_delta = float(
|
||
np.clip(self.last_nearest_charger_path_dist - self.nearest_charger_path_dist, -4.0, 4.0)
|
||
)
|
||
recharge_risk = self._recharge_risk_score()
|
||
approach_scale = 0.04 + 0.04 * recharge_risk
|
||
retreat_scale = 0.02 + 0.03 * recharge_risk
|
||
charge_reward += approach_scale * dist_delta if dist_delta > 0 else retreat_scale * dist_delta
|
||
if self.charger_safety_margin < self.recharge_enter_margin:
|
||
safety_shortage = self.recharge_enter_margin - self.charger_safety_margin
|
||
charge_reward -= min(0.55, safety_shortage / max(self.battery_max, 1))
|
||
elif self.on_charger and battery_ratio > 0.65:
|
||
charge_reward -= 0.08
|
||
|
||
# Encourage covering new passable cells and mildly discourage loops.
|
||
# 鼓励探索新格子，轻微惩罚反复绕圈。
|
||
if self.recharge_mode:
|
||
exploration_reward = 0.0
|
||
else:
|
||
exploration_reward = 0.004 if self.is_new_cell else -0.0015 * min(self.current_visit_count, 6)
|
||
|
||
# Collision/stuck signal: invalid moves waste both step and battery.
|
||
# 撞墙/原地不动会浪费步数和电量。
|
||
stuck_penalty = 0.0
|
||
if self.prev_pos is not None and self.cur_pos == self.prev_pos and 0 <= self.last_action < 8:
|
||
stuck_penalty = -0.03
|
||
if self.recharge_mode:
|
||
stuck_penalty -= 0.02 * min(self.stuck_steps, 5)
|
||
|
||
npc_penalty = 0.0
|
||
if self.npc_danger:
|
||
npc_penalty -= 4.0
|
||
elif self.nearest_npc_dist <= 3:
|
||
npc_penalty -= 0.05 * (4 - self.nearest_npc_dist)
|
||
|
||
terminal_penalty = 0.0
|
||
if self.terminated and not self.truncated:
|
||
if self.battery <= 0 or self.remaining_charge <= 0:
|
||
terminal_penalty -= self.battery_fail_penalty()
|
||
elif self.npc_danger or self.nearest_npc_dist <= 1:
|
||
terminal_penalty -= 3.0
|
||
|
||
return (
|
||
cleaning_reward
|
||
+ approach_reward
|
||
+ charge_reward
|
||
+ exploration_reward
|
||
+ stuck_penalty
|
||
+ npc_penalty
|
||
+ terminal_penalty
|
||
+ step_penalty
|
||
)
|