[Bf-gamedev] Importing issues

[Lina Halper]

In FBX SDK, which I understand you can’t use, they have unit conversion support via this.

FbxGlobalSettings via FBX Scene has GetSystemUnit that has FbxSystemUnit.

So for example, this is the way to convert scene to different units,

if( FbxScene->GetGlobalSettings().GetSystemUnit().GetScaleFactor() != 1.0 )
{
                KFbxSystemUnit::cm.ConvertScene( FbxScene );
}

So in theory, this should convert to correct unit if it was meter to centimeter. But when I read this scale from Blender, it is considered to be same.

From this I suppose there is some way of saving units in FBX.

Thanks,

--Lina,


From: bf-gamedev-bounces at blender.org [mailto:bf-gamedev-bounces at blender.org] On Behalf Of Bastien Montagne
Sent: Wednesday, May 07, 2014 1:22 PM
To: bf-gamedev at blender.org
Subject: Re: [Bf-gamedev] Importing issues

Hi LIna,
On 07/05/2014 18:46, Lina Halper wrote:
Hello,

I have a couple of question about importing part of blender. This test is done using FBXs from UE4 and other sources, and these two seem the biggest hurdle for us to work with blender.


1.       Converting Scene issue
- when importing the FBX exported from UE4 to blender, we see mesh is rotated.
- when we open this in Maya or FBX review, we don’t see this issue
- I’m wondering how you convert scene when imported. Do you read current scene set up and convert?
- Now if you modify and export back out, now mesh is rotated

2.       Converting Unit issue
- when importing FBX or Collada, if I have “import unit” option off, it imports as very small (1/100th). If I have that option on, it imports correctly.
- Is this intended?  How do you see your unit conversion with other package?

FBX import does not support units at all currently, afaik… And when there are no units, again different apps have different conventions, so one might export in mm when Blender will import in BlenderUnits (commonly accepted as meters, though this is configurable and ultimately a matter of convention, again). That’s why you have a Scale setting in importers and exporters, to apply some correction if needed.


Thanks,

--Lina,





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Cheers,
Bastien
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