koobas.hobune.stream
Any script to 'fix' normals/winding order?
I was wondering if anyone knows of an editor script which would go through a mesh and compare the normal direction(s) to the triangle vertex winding order, and fix them to match? Reason is, I got some crazy models from sketchup and I know the verts and tris are there, but some face the wrong way. So I wanna run like a sanity-check on them, either flip the order, or flip the normals. Probably flip the order, cuz I think the normals are correct.
Best Answer
This will flip the triangles. I'll leave it to you to pick one and compare the normals and fix them they way you want.
@MenuItem("GameObject/Flip Mesh", false, 4)
static function FlipMesh()
{
Undo.RegisterSceneUndo ("Flip Mesh");
var trs = Selection.GetTransforms (SelectionMode.Deep);
for (var tr in trs)
{
var r : MeshFilter = tr.gameObject.GetComponent.<MeshFilter>();
if (r)
{
var m : Mesh = r.sharedMesh;
if (m)
{
var tris : int[] = m.triangles;
for (var i : int = 0; i< tris.Length; i+= 3)
{
var t : int = tris[i];
tris[i] = tris[i+1];
tris[i+1] = t;
}
m.triangles = tris;
}
}
}
}
it's not easy for script to detect right face direct automatically
'calculate normals' in import settings for model can fix problem with incorrect normals.
