3DModel appearing incorrectly

[myyyaltacc-eng]

Problem description

When loading a model, it is appearing inside out and flipped. Is this intended? It is fixed by setting Scale to -100

Attach a .c3p

MODELBUG.zip

Steps to reproduce

1.Load testmodel.glb
2.Preview
3.

Observed result

It is flipped and inside out

Expected result

To look like how it is on Blender

More details

Affected browsers/platforms: Chrome

First affected release: 476.2 the z was broken, 478.2 z was fixed but model is still displayed incorrectly

System details

View details

PASTE HERE

[DiegoScirra]

The starting rotation of the model has to do with how it was authored, the editor is not changing anything. As for appearing inside out, I don't see what you mean, it seems to be ok.

[myyyaltacc-eng]

The starting rotation of the model has to do with how it was authored, the editor is not changing anything. As for appearing inside out, I don't see what you mean, it seems to be ok.

The cube has F = front, T = top, B = bottom/back, L = left and R = right. The left side of the test is how it loads in and the F is inside out or reversed. Here is a video https://streamable.com/d3go5p

Every model is like that, if you load a human holding a sword on his right hand, it will be on his left in Construct.

Check this video how that model is supposed to be https://streamable.com/el2ld3

[myyyaltacc-eng]

I made a new test to see it better with a human character and a sword on his right hand with animation.

MODELHUMANBUG.zip

here is video https://streamable.com/i6xqty

[ToadLobe]

The starting rotation of the model has to do with how it was authored, the editor is not changing anything. As for appearing inside out, I don't see what you mean, it seems to be ok.

@DiegoScirra just adding our experience to this thread:

Without applying -100% scale, models do indeed get mirrored along the X-axis (causing issues like text on signs being backwards, characters holding items in the wrong hand etc.) The -100% thing works, but this could have knock on effects (e.g. inverts face winding, and rotation direction) and is also just a bit of a pain.

This seems like a coordinate handedness mismatch, the glTF spec uses a right-handed coordinate system (i.e. X points right). Model3D seems like it uses a left-handed system, or does some similar negation along the X axis. I think this means that models authored according to the glTF spec display incorrectly in Construct, and it seems to me that an engine which supports glTF files should render them in the glTF coordinate space by default to avoid surprises.

I suppose this would be a breaking change for projects already using the inverted X axis, but 3DModel is a brand new feature and fixing stuff like this early on seems like the right approach, especially when changing the scale back to 100% isn't a difficult fix for those affected projects.

We are excited about 3DModel and would love to see points of friction like this addressed, thank you for your hard work on the feature!

[DiegoScirra]

I think this has to do with our renderer and how it handles axes, @AshleyScirra might need to take a look before doing any quick hack.

[xinlanjun]

Model origin "Z Origon" It's reversed Back and Front.