fix export size/scale correct in gltf format

[pvp-by]

Describe the bug

big size after export

What Valve game does this happen in

Dota 2

Reference file in a Valve game

*.vmdl_c

Expected behavior

export model original size

What version of VRF are you using? On what platform?

win 0.1.7.1501

i test export and decompile vmdl_c file

step by step:

1. I create a default cube in blender (smaller and green in the picture)
2. save it as fbx without changing the size or scale
3. create a model in dota2 from fbx mesh - compile as vmdl_c
4. Open this vmdl_c file in VRF
5. export and decompile as gltf
6. open it in blender . The result is shown in the picture below (big gray cube)

fix in https://github.com/SteamDatabase/ValveResourceFormat/blob/master/ValveResourceFormat/IO/GltfModelExporter.cs#L28

private readonly Matrix4x4 TRANSFORMSOURCETOGLTF = Matrix4x4.CreateScale(0.0254f) * Matrix4x4.CreateFromYawPitchRoll(0, (float)Math.PI / -2f, 0); change : private readonly Matrix4x4 TRANSFORMSOURCETOGLTF = Matrix4x4.CreateScale(0.01f) * Matrix4x4.CreateFromYawPitchRoll(0, (float)Math.PI / -2f, 0);

[xPaw]

Is Source 2 not using the 1 unit = 0.0254 meter conversion? I thought we tested this before.

[pvp-by]

Is Source 2 not using the 1 unit = 0.0254 meter conversion? I thought we tested this before.

I do not really know how to check how and in what counts as a source 2 I only in practice convinced of the incorrectness of the current behavior

[xPaw]

@Perryvw looked at this, and it would appear that the scaling is not consistent depending on what/how you import.

[kristiker]

3. create a model in dota2 from fbx mesh - compile as vmdl_c

You need to fix the scale in model editor. The cube will be larger than blender cube in game as well.