added 3D Preview of the models

[TaylorMouse]

No description provided.

[ZingBallyhoo]

no guarantees we will take this, but if we were to we would first need

all style/reformat changes undone. just causes massive clutter
obj code moved out of teModelChunk_RenderMesh.cs. owmdl code is in its own file and this should be too
delete teTriangle and just make a basic triangle type internal to obj writer
obj files shouldn't be written to disk for tankview preview
some explaination of whatever's changed in tankview

maybe other devs can come up with more

[TaylorMouse]

Oh, ok, I thought the comparison of git spoke for itself but here are the changes:

So to be able to render in 3D I used a nuget package called HelixToolkit & HelixToolkit.Core.Wpf. Which I referenced in the PreviewDataModel.xaml ( the one that said "Soon!" )
So I think that is the correct place.
Since this is for quick viewing I converted it to obj first, cuz that is a format the Helix3DViewport natively understands as a format.

In the MainWindow.xaml I added a button that allows the conversion of the selected objects to export to obj as well.

Since I didn't find a reference to a Tris or triangle I used the naming convention you guys use, hence the teTriangle.

I also made the gridsplitter more obvious cuz I found that it was confusing from a UX point of view, but you can always undo that.

In the GUID Collection I need to pass in the selected object or item ( value )

So I don't really understand the "clutter" you are refering to .

[ZingBallyhoo]

i mean dis. there is no code change here and other places in this file, just style

[TaylorMouse]

Oh, sry about that, I sometimes press K + D for auto formatting the code, I might have pressed that by accident :/