Actor Animation Problem

[Adam9174X]

Description

the Actor Animation class has a bug, that if you change the coordinate system in panda3d, it will break the animation, i will be adding a video to show what is going on

Panda.2024-05-14.00-20-13.mp4

Steps to Reproduce

here is the code to test it:

from direct.actor.Actor import Actor
from direct.showbase.ShowBase import ShowBase
from panda3d.core import loadPrcFileData

loadPrcFileData('', 'coordinate-system y-up-left')

app = ShowBase()
pandaActor = Actor('Assets/Player.bam')
pandaActor.reparentTo(base.render)
pandaActor.loop('Running')
pandaActor.setPos(0,0,15)

app.run()

Environment

• Operating system: Windows 10
• Panda3D version: 1.10.14
• Installation method: pip
• Python version: Python 3.12

[ArsThaumaturgis]

Based on a quick test, it looks like a model's animations are not altered to fit the current coordinate system. That is, if there a model has an animation that rotates a bone on the X-Z plane, then it rotates that bone on that plane regardless of the engine's coordinate system.

The question is: Should it be otherwise? If a model's animations are designed for a given coordinate system, and a different coordinate system is used by the project, should the engine update the animations?

[rdb]

Great question. bam is increasingly used as a storage format, and if regular models work fine in this manner, I'd argue people should expect animations to work fine as well. At least the behaviour should be consistent between the geometry data and the animation data.