koobas.hobune.stream
calculate normals
How do I calculate normals? normals must indeed at a 90 ° angle to the surface are ... how do I calculate that at a mesh?
I cant use RecalculateNormals becase this smooths my mesh
you need to set the normal for each vertex. Just use an array for your normals. Like so:
normals [yourVertices] = Vector3.up;
Vector3.up should mean a 90° angle. (correct me if I'm wrong) After you've set your normals in the array just use:
mesh.normals = normals;
(sry my english isn't the best but I hope it helps. ^^' )
there an problem ... dat onyl works for an plan.. but my mesh isnt only an plane so how to calculate for a skew vertecie/face
Hi, meshes have the same amount of normals than vertices so if you want to have different normals for 2 faces that share 1 or more vertices: you have to duplicate vertices (and then normals).
When it's done, I guess that Unity's RecalculateNormals will compute a normal for the face and not an average of all the faces that share the same vertex.
If not: you can use the cross product of 2 vectors from each triangle to compute the normal. If the triangle is ABC, a cross product between AB and AC will give you a vector to normalize to create a normal (maybe you'll need to negate the normal to point "outside" or "inside" the mesh, as you need)
