The X format is broken and the animation doesn't play

Scripting Issues
1

Blender 2.8 came out and the egg format is outdated and there is no alternative yet. I decided to check out other suitable animation formats. First of all, I checked the X format. However, the code that works in 1.7.2 and 1.8.0 refuses to work 1.10.3

import direct.directbase.DirectStart
from direct.actor.Actor import Actor

DemoAnim = Actor()
DemoAnim.loadModel('model.X')
DemoAnim.loadAnims({'Anim':'model.X'})
DemoAnim.loop('Anim', 'Anim-2')
DemoAnim.reparentTo(render)

run()

Animation just doesn’t play. Actually, what will this code look like on 1.10.3?

X.zip (205.4 KB)

2

I found out that in panda3D 1.10.3 the loop () method does not work for third-party formats.

Worked:

DemoAnim = Actor('model.X', {'Anim':'model.X',})
DemoAnim.play('Anim')
DemoAnim.reparentTo(render)

No worked:

DemoAnim = Actor('model.X', {'Anim':'model.X',})
DemoAnim.loop('Anim')
DemoAnim.reparentTo(render)

Error:

DemoAnim = Actor('model.X', {'Anim':'model.X',})
DemoAnim.actorInterval("Anim", playRate = 2).loop()
DemoAnim.reparentTo(render)

Using deprecated DirectStart interface.
Known pipe types:
  wglGraphicsPipe
(all display modules loaded.)
Traceback (most recent call last):
  File "C:\Panda3D-1.10.3-x64\direct\interval\Interval.py", line 444, in __playTask
    again = self.stepPlay()
  File "C:\Panda3D-1.10.3-x64\direct\interval\Interval.py", line 329, in stepPlay
    self.privInstant()
  File "C:\Panda3D-1.10.3-x64\direct\interval\Interval.py", line 233, in privInstant
    self.privStep(self.getDuration())
  File "C:\Panda3D-1.10.3-x64\direct\interval\ActorInterval.py", line 144, in privStep
    intFrame = int(math.floor(absFrame + 0.0001))
ValueError: cannot convert float NaN to integer
:task(error): Exception occurred in PythonTask Actor-Anim-1-play
Traceback (most recent call last):
  File "Demo.py", line 19, in <module>
    base.run()
  File "C:\Panda3D-1.10.3-x64\direct\showbase\ShowBase.py", line 3121, in run
    self.taskMgr.run()
  File "C:\Panda3D-1.10.3-x64\direct\task\Task.py", line 531, in run
    self.step()
  File "C:\Panda3D-1.10.3-x64\direct\task\Task.py", line 485, in step
    self.mgr.poll()
  File "C:\Panda3D-1.10.3-x64\direct\interval\Interval.py", line 444, in __playTask
    again = self.stepPlay()
  File "C:\Panda3D-1.10.3-x64\direct\interval\Interval.py", line 329, in stepPlay
    self.privInstant()
  File "C:\Panda3D-1.10.3-x64\direct\interval\Interval.py", line 233, in privInstant
    self.privStep(self.getDuration())
  File "C:\Panda3D-1.10.3-x64\direct\interval\ActorInterval.py", line 144, in privStep
    intFrame = int(math.floor(absFrame + 0.0001))
ValueError: cannot convert float NaN to integer
1 Like
3

I suspect that the difference is that 1.10 might prefer using the Assimp-based X importer as opposed to the old x2egg process. What if you explicitly invoke x2egg and load the resulting egg?

4

When converting, the play method does not even work. The most amazing thing is that the animation is played by Pview.

egg.zip (203.0 KB)

Add.
However it works:

        DemoAnim = Actor('model', {'Anim':'model',})
        DemoAnim.actorInterval("Anim", playRate = 2).loop()
        DemoAnim.reparentTo(render)
5

I found that the animation does not play without .self
The file X converted to egg produces animation.

from direct.showbase.ShowBase import ShowBase
from direct.actor.Actor import Actor
 
class MyApp(ShowBase):
 
    def __init__(self):
        ShowBase.__init__(self)

        self.DemoAnim = Actor("file", {"Anim":"file",})
        self.DemoAnim.reparentTo(render)
        self.DemoAnim.loop("Anim")

app = MyApp()
app.run()

However, the X file if available. .self, not play.

from direct.showbase.ShowBase import ShowBase
from direct.actor.Actor import Actor
 
class MyApp(ShowBase):
 
    def __init__(self):
        ShowBase.__init__(self)

        self.DemoAnim = Actor("model.X", {"Anim":"model.X",})
        self.DemoAnim.reparentTo(render)
        self.DemoAnim.loop('Anim', 'Anim-2')

app = MyApp()
app.run()
6

Now that you mention it, I seem to recall that that’s normal behaviour in Panda: Actors to which you don’t keep a reference don’t animate.

(This doesn’t, however, speak to animations not working with “.x” files.)