Search Issue Tracker

Fixed in 2020.1.X

Fixed in 2019.3.X



Found in





Issue ID




Cloth's movement simulation is incorrect when the game object is rotated in world space



How to reproduce:
1. Open the attached '' project
2. Enter Play mode
3. Move the red cloth horizontally forward and backward
3. Move the blue cloth horizontally forward and backward

Expected result: rotated (blue) cloth acts differently from the non-rotated (red) one when being moved horizontally
Actual result: rotated (blue) cloth acts the same way as the non-rotated (red) one when being moved horizontally

Reproducible with: 2019.2.6f1, 2019.2.11f1, 2019.3.0b2, 2019.3.0b9, 2020.1.0a2, 2020.1.0a11
Not reproducible with: 2017.4.33f1, 2018.4.12f1, 2019.2.0a1, 2019.2.5f1, 2019.3.0a1, 2019.3.0b1, 2020.1.0a1

  1. Resolution Note (fix version 2020.1):

    Fixed in 2020.1.0a24

  2. Resolution Note (fix version 2019.3):

    Fixed in 2019.3.2f1

Comments (3)

  1. Redrag

    Feb 21, 2020 14:20

    Just tested in 2019.3.2f1. Its still broken. The External Acceleration is still in local space. So I have wasted most of the morning converting my project. Next time I will just do a 5 minute test. Just hang a curtain. Rotate in world space. The wind follows the curtain so it is blowing in local space!

    Also, it seems even more buggy than in 2019.2 with constraints vanishing (have to change the layout to bring them back). The model jumps all of the place in the editor. We are going backwards!

  2. Redrag

    Feb 04, 2020 09:12

    Update - I don't think it is using local space either. The direction of the External Acceleration does not seem to relate to the cloth's transform OR world space. It makes me think it is picking up a coordinate system from the mesh.

  3. Redrag

    Jan 21, 2020 13:34

    I have found that the External Acceleration acts locally instead of globally. 2019.2.17f, 2020.1.0a19

Add comment

Log in to post comment

All about bugs

View bugs we have successfully reproduced, and vote for the bugs you want to see fixed most urgently.