Recalculate the normals

[Kacem Yacine]

I'm using PyCollada to change vertices's positions.
Then I want to recalculate the normals to correct it. I'm using the function 'generate_normals.generateNormals(mesh)' but it doesn't change anything.

[Jeff Terrace]

Are you using this function in meshtool?
https://github.com/pycollada/meshtool/blob/master/meshtool/filters/optimize_filters/generate_normals.py

Does your triangleset already have normals in it? It looks like that filter only generates normals if they don't already exist.

On Tue, Apr 17, 2018 at 11:40 PM Kacem Yacine <yacine...@gmail.com> wrote:

I'm using PyCollada to change vertices's positions.
Then I want to recalculate the normals to correct it. I'm using the function 'generate_normals.generateNormals(mesh)' but it doesn't change anything.

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[Kacem Yacine]

Hi, yes, I used it.

You are right, I changed the function to recalculate the normal even if it already exists

But I still get wrong normals

Do you have any idea how can I correct them?
And thank you.

[Jeff Terrace]

I can't help unless you provide some more info. What do you mean by "wrong normals"?