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5.85 kB
| """ | |
| 读取 MimicGen 源本体(UR5e)演示,并提取 Track A 需要的 GT。 | |
| 实现要点:把演示里的完整 MuJoCo 状态在源本体环境里**一次性重放**,同时拿到 | |
| · 源末端控制点(grip_site)的位姿轨迹 —— 这是要被 retarget 的东西 | |
| · 物体位姿轨迹、抓取事件时序、任务成功判定 —— 这是与本体形态无关的 GT | |
| 注意不要用 hdf5 里的 `robot0_eef_quat` 观测:它是 right_hand **body** 的姿态, | |
| 而 OSC 控制器控制的是 grip_**site**,两者相差一个 90° 固定旋转。混用会引入 | |
| 一个恒定姿态偏置(这本身就是"帧约定不一致"类 retarget 失败的典型形态)。 | |
| """ | |
| import json | |
| from dataclasses import dataclass | |
| from typing import Dict, Optional | |
| import h5py | |
| import numpy as np | |
| from . import envs as E | |
| class SourceDemo: | |
| """源本体演示里、retarget 所需要的全部输入。""" | |
| demo_key: str | |
| env_name: str | |
| source_robot: str | |
| eef_pos: np.ndarray # (T, 3) grip_site 位置(世界系) | |
| eef_mat: np.ndarray # (T, 3, 3) grip_site 姿态(世界系) | |
| gripper_cmd: np.ndarray # (T,) +1 闭合 / -1 张开 | |
| raw_actions: np.ndarray # (T, 7) 源演示原始动作(open_loop baseline 用) | |
| object_init: Dict[str, np.ndarray] | |
| n_steps: int | |
| scene_xml: str = None | |
| class GTTrace: | |
| """源演示自身产生的 GT(形态无关的任务不变量)。""" | |
| object_traj: Dict[str, np.ndarray] # {joint_name: (T, 7)} | |
| primary_joint: str # 位移最大的物体自由关节(任务相关物体) | |
| grasp_flags: np.ndarray # (T,) 是否处于稳定抓取 | |
| grasp_step: int | |
| release_step: int | |
| success: Optional[bool] # None: source success was not measured | |
| def collision_geoms_of(env, prefix): | |
| """按名字前缀取物体的碰撞几何体(排除 _visual)。""" | |
| return [ | |
| env.sim.model.geom_id2name(i) | |
| for i in range(env.sim.model.ngeom) | |
| if (env.sim.model.geom_id2name(i) or "").startswith(prefix) | |
| and not (env.sim.model.geom_id2name(i) or "").endswith("_visual") | |
| ] | |
| def _pick_primary_joint(traj, grasp): | |
| """ | |
| 判定"被操作的物体"。 | |
| 不能简单用位移最大:robosuite 在 single_object_mode 下会把任务无关的物体 | |
| (如 Square_D0 里的 RoundNut)停放在 (10,10,10) 之外,它掉落产生的位移 | |
| 高达 10m,会盖过真正被操作物体的 0.35m。 | |
| 因此优先用"在源演示中被夹爪稳定抓取过"来判定,抓取时长最久者胜; | |
| 若都没抓取记录,则退化为在工作空间内(|xy| < 3m)位移最大者。 | |
| """ | |
| grasped = {j: int(g.sum()) for j, g in grasp.items() if g.any()} | |
| if grasped: | |
| return max(grasped, key=grasped.get) | |
| in_ws = { | |
| j: float(np.linalg.norm(v[-1, :3] - v[0, :3])) | |
| for j, v in traj.items() | |
| if np.abs(v[0, :2]).max() < 3.0 | |
| } | |
| pool = in_ws or {j: float(np.linalg.norm(v[-1, :3] - v[0, :3])) for j, v in traj.items()} | |
| return max(pool, key=pool.get) | |
| def load_demo(dataset_path, demo_key, source_env): | |
| """一次重放,同时返回 SourceDemo 与 GTTrace。""" | |
| with h5py.File(dataset_path, "r") as f: | |
| d = f["data"][demo_key] | |
| raw_actions = np.array(d["actions"]) | |
| states = np.array(d["states"]) | |
| model_xml = d.attrs["model_file"] | |
| env_args = json.loads(f["data"].attrs["env_args"]) | |
| source_env.reset() | |
| scene_xml = source_env.edit_model_xml(model_xml) | |
| source_env.reset_from_xml_string(scene_xml) | |
| source_env.sim.reset() | |
| obj_joints = E.discover_object_joints(source_env) | |
| obj_geoms = { | |
| j: collision_geoms_of(source_env, j.split("_joint")[0]) for j in obj_joints | |
| } | |
| T_len = len(states) | |
| eef_pos = np.zeros((T_len, 3)) | |
| eef_mat = np.zeros((T_len, 3, 3)) | |
| traj = {j: np.zeros((T_len, 7)) for j in obj_joints} | |
| grasp = {j: np.zeros(T_len, dtype=bool) for j in obj_joints} | |
| for t in range(T_len): | |
| source_env.sim.set_state_from_flattened(states[t]) | |
| source_env.sim.forward() | |
| source_env._get_observations(force_update=True) | |
| p, m = E.eef_pose(source_env) | |
| eef_pos[t], eef_mat[t] = p, m | |
| for j in obj_joints: | |
| traj[j][t] = source_env.sim.data.get_joint_qpos(j) | |
| grasp[j][t] = bool( | |
| source_env._check_grasp( | |
| gripper=source_env.robots[0].gripper, object_geoms=obj_geoms[j] | |
| ) | |
| ) | |
| # Public demonstrations are accepted without a source-task success check. | |
| from scene_binding import nonrobot_joint_state | |
| source_env.sim.set_state_from_flattened(states[0]);source_env.sim.forward() | |
| object_init = nonrobot_joint_state(source_env) | |
| primary_joint = _pick_primary_joint(traj, grasp) | |
| gflags = grasp[primary_joint] | |
| gidx = np.where(gflags)[0] | |
| grasp_step = int(gidx[0]) if len(gidx) else -1 | |
| release_step = -1 | |
| if grasp_step >= 0: | |
| after = np.where(~gflags[grasp_step:])[0] | |
| release_step = int(grasp_step + after[0]) if len(after) else -1 | |
| source_env.sim.set_state_from_flattened(states[-1]) | |
| source_env.sim.forward() | |
| demo = SourceDemo( | |
| demo_key=demo_key, | |
| env_name=env_args["env_name"], | |
| source_robot=env_args["env_kwargs"]["robots"][0], | |
| eef_pos=eef_pos, | |
| eef_mat=eef_mat, | |
| gripper_cmd=raw_actions[:, -1], | |
| raw_actions=raw_actions, | |
| object_init=object_init, | |
| scene_xml=scene_xml, | |
| n_steps=T_len, | |
| ) | |
| gt = GTTrace( | |
| object_traj=traj, | |
| primary_joint=primary_joint, | |
| grasp_flags=gflags, | |
| grasp_step=grasp_step, | |
| release_step=release_step, | |
| success=None, | |
| ) | |
| return demo, gt | |