armory3d / armory3d/armory

Clear Parent Inverse - object align issue - parented object animation

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bug
Dominant language
C++
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Description

The following problem occurs only with one .blend file that I have. I stripped down this fairly complex file so that it only contains only two parented cubes with simple animations. If I recreate the scene from scratch with a new .blend file, it works fine.

Here is the scene setup:
![image](https://user-images.githubusercontent.com/33040347/32405422-1a36b1ca-c165-11e7-8eb4-4a07350eed4d.png)

The cubes are animated to move up and down. In Blender:
![image](https://user-images.githubusercontent.com/33040347/32405439-506f49d2-c165-11e7-9cd1-e3589df061a7.png)

In Armory, the cubes are misaligned.
![image](https://user-images.githubusercontent.com/33040347/32405442-5d503080-c165-11e7-81f6-d8ba1af87053.png)

...No idea where this could be coming from.

[Issue.zip](https://github.com/armory3d/armory/files/1443201/Issue.zip)

Contributor guide

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Research direction

Open Issue.zip and reproduce the two-parented-cube animation in Blender and Armory. Compare the parent inverse and resulting object alignment during playback, then trace the Blender-to-Armory handling of that scene. Done means the animated cubes remain aligned in Armory as they do in Blender.

Written by the indexing model from the issue text.

Assessment

Tech stack
blender
Domain
computer-graphics
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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