Problems rotating a skinned mesh

[ProfessorF]

On some skinned character meshes, this code works fine:

 

Meshes[0].rotation.Y = SOME RADIAN VALUE;

 

For example, that line works fine with Microsoft's dude.fbx, and usually any other model that I skin and animate by hand.

 

But on other character meshes -  like the ones from Autodesk Character Generator -- the rotation is ignored.

 

Any clues?

 

Thanks in advance.

[Temechon]

Hi,

 

I guess you're exporting your model from 3DSMax. There is a option in the scene properties (right click in your viewport -> Babylon -> Babylon Properties) called "export rotationQuaternion instead of Euler angles". I don't remember exactly the name but you got it

If this option is checked (by default it's checked), you have to use mesh.rotationQuaternion to rotate your object. When this attribute is set, mesh.rotation is ignored.

Be careful, you have to use a quaternion to rotate

 

I think something like this would do the trick:

mesh.rotationQuaternion = BABYLON.Quaternion.RotationAxis(BABYLON.Axis.Y, SOME_RADIAN_VALUE)

[Dad72]

or

 

mesh.rotationQuaternion = null;

 

this way you can use mesh.rotation

[ProfessorF]

Thanks guys. 

 

1) @Temechon, I unchecked that option in 3DS Max, but it still exported a quaternion. Maybe something for DeltaKosh to fix.

2) @Dad72, set to null, but then the character was rotated 90 in the X-axis.

 

I was able to kludge it to work by rotating 90-X and then doing the Y-rotation, but still I'd like to find a solution that works for *any* imported character.  

 

Anyway, thanks! I'll keep working on this.

 

 

#AutoDeskCharacterGenerator #3DSMax

Keywords: AutoDesk Character Generator, 3DS Max, Babylon Exporter

[GameMonetize]

I double checked on my side and unchecking the "Export quaternion" worked for me.

 

If you want to remove the quaternionRotation you have to then set the rotation to the equivalent euler angle rotation (in your case just set rotation = new BABYLON.Vector3(Math.PI/2, 0, 0))

[GameMonetize]

@Prof: I found the bug for the quaternion exporter! Thank you for reporting it the new exporter is on the github now thanks to Luaacro

[Wingnut]

Nice bug find, you guys!

 

And, it's good to see you again, Prof-F!  Come visit us, and tell us of your projects... more often, if you can!  You're one of the founding fathers around here.

[ProfessorF]

Haha, I don't know about that. But my grant is winding down so I definitely will spend more time with the Babylon.js community! Love you guys.