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Isaac Sim backend

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评估

难度
5/5
预计耗时
一周以上
新手友好度
25/100
Issue 类型
功能
描述清晰度
基本清楚
活跃度
活跃
技术栈
python
领域
backend, robotics

调研方向

Start with the backend protocol changes in #676 and the backend registry work in #902, then read the URDF loading path and Isaac Sim 6.2's SimulationApp and URDF importer documentation. The issue defines the first milestone around a desktop scene, URDF-backed robots, per-instance joint state, and a screencast; testing strategy, Python version support, restart behavior, and expanded URDF handling still need decisions. The linked prerequisite and request for a named contributor make this a poor first issue.

由索引模型根据 Issue 内容生成。

描述

enhancement

Part of #886. For @alexermolovich — please comment here so you can be assigned.

Scope (milestone 1)

  • backend="isaacsim" starts Isaac Sim via SimulationApp, with a basic scene (camera, lighting)
  • add(robot) for URDF-backed robots, converted to USD with Isaac's URDF importer
  • add() returns a handle that owns its own q, so several instances of one model work
  • Desktop only, Isaac Sim 6.2, optional isaacsim extra with a lazy import; import roboticstoolbox must still work without it

Target

A URDF Panda from robot_descriptions:

panda.plot(panda.qr, backend="isaacsim")
traj = rtb.jtraj(panda.qz, panda.qr, 50)
panda.plot(traj.q, backend="isaacsim", dt=0.05)

A screencast in Discussions → Show & Tell.

Out of scope for now

Notebooks, teach, ellipsoids, ETS/DH robots, physics-driven step.

Open questions (to settle before the PR is reviewed)

  1. Testing. Isaac Sim needs a GPU and isn't open licensed, so it can't run in CI. What's testable without it (mocked SimulationApp, joint-mapping logic), and what's the manual checklist for the rest?
  2. Dispatch. Blocked by #902 (backend registry). Register the backend there as isaacsim. Once #902 is merged, you can also develop and test outside the RTB tree with register_backend("isaacsim", ...).
  3. Expanded URDF. Keeping the expanded XML (Xacro args, patches) changes RTB's URDF loading. Please do that as a separate, small PR first.
  4. Python versions. Isaac Sim targets 3.12, while RTB supports 3.10–3.14. The extra should install only where Isaac Sim does.
  5. restart(). If Isaac Sim can't restart in-process, raise a clear error and say so in the docs, rather than half-supporting it.

Process

  • One backend per PR. Open a draft PR early.
  • Follow #676 (protocol changes) and avoid relying on Gripper details (#884).
  • Say in the PR if an AI assistant helped (AGENTS.md).
  • If there's been no activity for about four weeks, the backend goes back to "available" in #886.

Generated by Claude Code

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环境准备

从这里开始

  1. 先读完整个 Issue,再读项目的贡献指南。
  2. 在 Issue 下留言说明你要接手 —— 这能避免两个人做同样的事。
  3. Fork 仓库,在一个分支上完成修改。
  4. 提交 Pull Request,并在描述里引用这个 Issue 编号。

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