[Resolved] Load IrrEdit scene bug?

sio2 · Post by **sio2** » Sat Dec 20, 2008 7:51 am

JP's IrrEdit scene from IrrPhysX 0.2. Loaded using LoadIrrFile sample:

Irrlicht 1.4.2

Irrlicht 1.5

NOTE: The shack door is around the opposite side with 1.5, but it looks like the mesh is mirrored, not rotated 180 degrees about Y.

night_hawk · Post by **night_hawk** » Sat Dec 20, 2008 9:17 am

Could be a result of the mesh orientation changes they made a while ago... Because all meshes are mirrored.

MasterGod · Post by **MasterGod** » Sat Dec 20, 2008 1:48 pm

night_hawk wrote:Could be a result of the mesh orientation changes they made a while ago... Because all meshes are mirrored.

Sorry but what are you talking about? I'm not familiar with this change..

sio2 · Post by **sio2** » Sat Dec 20, 2008 2:48 pm

Wait a minute. 1.4.2 SEEMS WRONG ALSO! WTF?

The House (shack) model is a MilkShape3D model. If I load it in IrrEdit 1.4.2 and load it in MilkShape3D 1.8.4 then the window and door are on the wrong side. So it looks like 1.4.2 is loading MS3D models mirrored in X.

sio2 · Post by **sio2** » Sat Dec 20, 2008 3:06 pm

Additional: seems the issue is with (at least) the MilkShape3D loader. If I load the MS3D model in MilkShape, save as B3D and load both in IrrEdit then the the B3D version has the door/window on the correct sides (the MS3D model has the door/window on the wrong side).

This is 1.4.2 BTW. 1.5 has its own weirdness going on.

sio2 · Post by **sio2** » Sat Dec 20, 2008 3:30 pm

Additional:
Looking at the Irrlicht 1.5 source for the MS3D loader, there's a piece of code that negates the Z value of each vertex; so this is the cause of the 1.5 weirdness for MS3D models (other loaders may still be incorrect though).

Acki · Post by **Acki** » Sat Dec 20, 2008 3:46 pm

sio2 wrote:Additional:
Looking at the Irrlicht 1.5 source for the MS3D loader, there's a piece of code that negates the Z value of each vertex; so this is the cause of the 1.5 weirdness for MS3D models (other loaders may still be incorrect though).

yup, there was a bug with ms3d meshes !!!

http://irrlicht.sourceforge.net/phpBB2/ ... hp?t=30489
maybe the scene was created with the buggy version ???

hybrid · Post by **hybrid** » Sat Dec 20, 2008 3:50 pm

1.5 should have the proper orientation. I've gone through all right-to-left handed changes etc. and all my ms3d models look correct (compared to other mesh file formats of the same meshes).

sio2 · Post by **sio2** » Sat Dec 20, 2008 4:01 pm

Acki wrote:
sio2 wrote:Additional:
Looking at the Irrlicht 1.5 source for the MS3D loader, there's a piece of code that negates the Z value of each vertex; so this is the cause of the 1.5 weirdness for MS3D models (other loaders may still be incorrect though).
yup, there was a bug with ms3d meshes !!!
http://irrlicht.sourceforge.net/phpBB2/ ... hp?t=30489
maybe the scene was created with the buggy version ???

I think the "fix" (revision 1613) flipped the model front-to-back instead of left-to-right. Plus, it looks like the OP didn't come back in that thread to verify...

sio2 · Post by **sio2** » Sat Dec 20, 2008 4:12 pm

hybrid wrote:1.5 should have the proper orientation. I've gone through all right-to-left handed changes etc. and all my ms3d models look correct (compared to other mesh file formats of the same meshes).

Hmmm. I think I see. Because JP positioned his MS3D meshes in IrrEdit 1.4.2 based on a broken orientation then when Irrlicht 1.5 loads them correctly they instantly look wrong.

Acki · Post by **Acki** » Sat Dec 20, 2008 4:51 pm

sio2 wrote:Hmmm. I think I see. Because JP positioned his MS3D meshes in IrrEdit 1.4.2 based on a broken orientation then when Irrlicht 1.5 loads them correctly they instantly look wrong.

that's what I meant here:

Acki wrote:maybe the scene was created with the buggy version ???

sio2 · Post by **sio2** » Sat Dec 20, 2008 6:14 pm

It still seems that with no rotations a model in MilkShape points "towards" you wheareas in Irrlicht it points "away", though this could just be a coordinate system issue.