blender/blender

Incorrect Angles After Reading a BVH file #106939

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opened 2023-04-14 11:48:42 +02:00 by Ammar Qammaz · 2 comments

Ammar Qammaz commented

2023-04-14 11:48:42 +02:00

System Information
Operating system: Ubuntu 22.04.2 LTS
Graphics card: NVIDIA GeForce GTX 1050

Blender Version
Broken: blender-3.4.1-linux-x64

Short description of error
Opening the test.bvh file attached It would be expected (as seen by opening the bvh file with the notepad) that the first frame Neck1 ZXY values are (-20.0,-20.0,-20.0) the second frame Neck1 ZXY values are (0,0,0) the third are (-10,-10,-10) and the fourth (10,10,10).
However after opening the file with Blender 3.4.1 and inspecting the neck1 bone it is set to (-24.4,-18.8,-7.09) , second frame is correctly set to (0,0,0), third frame is set to (-11.3,-10.8,-5.12) and fourth to (8.11,14.1,8.39).
There is some sort of :
coordinate difference(?)
rotation order difference in the background conversion(?)
rounding error(?)
while loading the BVH file

Any idea on what is wrong or how I can have a 1:1 correspondance of the BVH file I have on disk compared to the lodaded armature in Blender?

Exact steps for others to reproduce the error
Based on the default startup or an attached .blend file (as simple as possible).
Import the BVH file attached
Go to pose mode
Select the neck1 Bone and open the Transform Tab
Go to frames 1..4 on the timeline and check the values against the BVH file

**System Information** Operating system: Ubuntu 22.04.2 LTS Graphics card: NVIDIA GeForce GTX 1050 **Blender Version** Broken: blender-3.4.1-linux-x64 **Short description of error** Opening the test.bvh file attached It would be expected (as seen by opening the bvh file with the notepad) that the first frame Neck1 ZXY values are (-20.0,-20.0,-20.0) the second frame Neck1 ZXY values are (0,0,0) the third are (-10,-10,-10) and the fourth (10,10,10). However after opening the file with Blender 3.4.1 and inspecting the neck1 bone it is set to (-24.4,-18.8,-7.09) , second frame is correctly set to (0,0,0), third frame is set to (-11.3,-10.8,-5.12) and fourth to (8.11,14.1,8.39). There is some sort of : coordinate difference(?) rotation order difference in the background conversion(?) rounding error(?) while loading the BVH file Any idea on what is wrong or how I can have a 1:1 correspondance of the BVH file I have on disk compared to the lodaded armature in Blender? **Exact steps for others to reproduce the error** Based on the default startup or an attached .blend file (as simple as possible). Import the BVH file attached Go to pose mode Select the neck1 Bone and open the Transform Tab Go to frames 1..4 on the timeline and check the values against the BVH file

39 KiB

screen-2023-04-14-12-48-20.jpg

65 KiB

screen-2023-04-14-12-33-44.jpg

82 KiB

Ammar Qammaz added the

labels 2023-04-14 11:48:43 +02:00

Iliya Katushenock added the

Animation & Rigging

label 2023-04-14 13:48:31 +02:00

Germano Cavalcante commented

2023-04-14 18:01:01 +02:00

Member

Thank you for taking the time to report a bug in Blender. However, as you have reported an issue related to the "BioVision Motion Capture (BVH) format" addon, it should have been reported in the blender-addons repository instead of the blender repository.

Unfortunately, we have to close your report as it was filed in the wrong repository.

Please use the following link to report the issue in the correct repository: https://projects.blender.org/blender/blender-addons/issues/new/choose

Or in Blender click on Report a Bug as shown in the image below:

(Note that when I read the report, it's not so clear to me that it's really a bug. Looks like a support request. For help using Blender, we have the community websites: https://www.blender.org/community/)

Thank you for taking the time to report a bug in Blender. However, as you have reported an issue related to the "BioVision Motion Capture (BVH) format" addon, it should have been reported in the [blender-addons](https://projects.blender.org/blender/blender-addons) repository instead of the [blender](https://projects.blender.org/blender/blender) repository. Unfortunately, we have to close your report as it was filed in the wrong repository. Please use the following link to report the issue in the correct repository: https://projects.blender.org/blender/blender-addons/issues/new/choose Or in Blender click on `Report a Bug` as shown in the image below: ![image](/attachments/5f584458-5292-4189-bd4a-751d5bbcb540) (Note that when I read the report, it's not so clear to me that it's really a bug. Looks like a support request. For help using Blender, we have the community websites: https://www.blender.org/community/)

51 KiB

Germano Cavalcante closed this issue

2023-04-14 18:01:03 +02:00

Blender Bot added

and removed

labels 2023-04-14 18:01:04 +02:00

Ammar Qammaz commented

2023-04-16 22:39:08 +02:00

Author

Thank you I have followed your instructions and openned an issue here : blender/blender-addons#104549
for anyone searching this in the future.

Thank you I have followed your instructions and openned an issue here : https://projects.blender.org/blender/blender-addons/issues/104549 for anyone searching this in the future.

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