Daz Vertex normal

[nexer]

Hi,
Does anyone know where to find the vertex normal for genesis?
We have this two files: .duf/.dsf. Inside I can't find anything about vertex normal.
I suppose that using the vertices, DAZ makes the calculations to get the vertex normal. Am I right?

 

[Elohiem]

Not sure of your intentions here, you can export your model to .obj format. The vertexnormals start with 'vn'.

 

[nexer]

Thanks,
My intention is to use vertex normal in a script, their direction out.
I knew this, but you have to export it as .obj and import it later.
I was interested for Genesis. When you export it, the .obj file has all the (vn). I suppose that DAZ makes the calculations, because inside the .duf the values of the vertex normal are not explicit.

 

[Elohiem]

Indeed, perhaps you can calculate them inside your script if that's within your time-budget .

You can assume the normals to be perpendicular to the face of the plane and construct the face itself from the vertexpositions located inside .dsf. Then for a given point of a triangle (where 2 or more faces meet) take the average of the neighbouring facenormals.

This could be an accurate enough solution depending on the usecase, but these normals are later interpolated during rasterization.

 

[nexer]

Yeap. DAZ has an internal script which collect all data and write an .obj file. So, I don't know, yet, if an user using Script IDE could access it.
More, I have to try, if using DAZ script IDE can I read a local file. If it will work, first step: Export a Genesis as .obj and second step: read the .obj saved file and connect (vn) with each Genesis vertex.

 

[nexer]

I think I find something. It's in Python

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Here is the script.

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I will take a look at, it's for Blender but, at least, give us an idea about.

 

[nexer]

Ok, I found a script that working with Genesis8.1

Spoiler: Script G8.1

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[Elohiem]

The .obj format is an open standard, thus rules are not set in stone. Anyone can give it's own interpretation, and so does Daz.

I can share a snippet of my project where I specifically target Daz. And I wrote it in C# if that's your thing .
With this snippet you can read a .obj and have all the vertices and normals for every face in a list called 'ftuples'. Hope that helps you somewhat further.

I will also include a script to export a model from Daz to .obj with all the right settings.

 

[nexer]

The .obj format is an open standard, thus rules are not set in stone. Anyone can give it's own interpretation, and so does Daz.

I can share a snippet of my project where I specifically target Daz. And I wrote it in C# if that's your thing .
With this snippet you can read a .obj and have all the vertices and normals for every face in a list called 'ftuples'. Hope that helps you somewhat further.

I will also include a script to export a model from Daz to .obj with all the right settings.

I'm with C++, but THANKS A LOT . I will "translate" it.

 

[Elohiem]

I don't have genesis 8.1, but i do have genesis 8. The way daz stores the model (data\DAZ 3D\Genesis 8\Female\Genesis8Female.dsf) is almost exactly to that of .obj. You could skip the step of exporting and directly parse this file.

Take a look:

Spoiler: vertexpositions g8

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And the corresponding indices to make the triangle:
You should skip the first 2 columns since they are used for group ID's.

Spoiler: face indices g8

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Might I still suggest to do a toy example with a debugger before doing it in Daz or you will pull your hair out .

 

[nexer]

I will . It's the same G8/G8.1.
I need VN, vertex and their coords are all there.

 

[Elohiem]

Indeed you need the vertexnormals. In that case you may be able to infer them from the vertexpositions.
You will likely not be able to verify that the normals that you assign and compute for each face are the correct ones unless you have a way of visualizing that onto the model .

I'm contemplating if i should give this excercise a go myself .. after work

Just a few questions:

• Do you wish to edit vn's or just be able to read them?
• Does g8/g8.1 have any morphs/poses applied?
• Is a list of unordered vn's per triangle the expected output?

 

[nexer]

Indeed you need the vertexnormals. In that case you may be able to infer them from the vertexpositions.
You will likely not be able to verify that the normals that you assign and compute for each face are the correct ones unless you have a way of visualizing that onto the model .

I'm contemplating if i should give this excercise a go myself .. after work

Just a few questions:

• Do you wish to edit vn's or just be able to read them?
• Does g8/g8.1 have any morphs/poses applied?
• Is a list of unordered vn's per triangle the expected output?

Outside of DAZ we have .OBJ, I don't know .FBX never opened a fbx file.
Inside of DAZ, we have this:

Spoiler: IndexNormal

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• Reading them would be enough, but if I can read them inside, editing would not be a problem. What I'm interested in is IN/OUT the body.
• G8 has a Tpose, G8.1 has a Apose. If you use the last Public Build, G8.1 is inside the G8Female folder.
• the code above gives you the index of the vertex normal.

 

[Elohiem]

FBX is proprietary and as far as I know you need to pay to be able to parse that.

I never tried editing the mesh within Daz, but from your code I quickly tried:

print(oMesh.getNormal(index));

It gives a valid output ranging between [0, 1]:

[0.238972,0.961207,0.125559]

Which seems to be what you are after? (documentation seems to be missing)

 

[nexer]

getNormal. Where you get.this.
I have tried all kind of combinations . Thanks a lot.
Right now I have to check VN .obj with this getNormal:

 

[Elohiem]

From this post:

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I saw getVertex(), so naturally the other one should be getNormal()

 

[nexer]

So as not to drive me crazy, checking using a cube. Look what we have here:

* an error: Last IndexNormal is 23.

And the result using DAZ-Script:


We are 100% that .OBJ uses index tu write VN in an .OBJ file. First line who starts with vn has Index 0.
What can I say. Good Job

 

[nexer]

From this post:

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I saw getVertex(), so naturally the other one should be getNormal()

Thanks for your help.