Pricing
00
In productionProintermediatetf2 frames

The transform is inverted

Look up the transform in the correct direction so points convert the right way.

Pairs with Coordinate frames with tf2 in Learn ROS 2 from the basics. Read the concept first, then diagnose it here.

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Operator report

Points transform to the negative of where they should be.

Ubuntu 24.04, ROS 2 Jazzy, rclpy, a single-package browser workspace

01

System boundary

Trace only the relevant path.

3 nodes
  1. 01lookup call→
  2. 02target/source order→
  3. 03transformed pointOUT
02

How this lab works

You diagnose it. No command list.

Open the repair workspace and gather your own evidence in a real terminal. No diagnostic commands are handed to you - finding the fault is the exercise. Stuck? Progressive hints unlock inside the workspace.

03

Verification

Pass more than the visible symptom.

4 checks
  • Lookup order is correct
  • Points convert the right way
  • Hidden regression behavior
  • Root cause explanation