Off by default because it is very useful only in particular situations like when you have perfectly flat areas finely tessellated. Like the quality threshold it affects the accuracy/complexity ratio. Meshlab and Blender seems to solve this problem during import as there are no vertex duplicates in the STL meshes that I have worked with. It can greatly improve the quality of the shape of the final triangles on perfectly planar portions of the mesh.

It’s on by default.Īdd additional simplification constraints that try to preserve the current shape of the triangles. If disabled, the edges are collapsed onto one of the two vertices and the vertices of the final mesh are a subset of the original mesh. You shouldn't need to align & merge the part after you seperate them unless you moved. Which one would be best is comewhat dependent on the model, but Blender would be a good place to start. When collapsing an edge the chosen vertex position minimizes the current estimated error. If you need to actualy cut the mesh apart then you need to do that in another program MeshLab can't even accomplish a plane cut. If you cant get the source files you wont be able to position your 2 parts that precise.

Optimal position of simplified vertices: Yes. The value is in the range : 0 accept any kind of face (no penalties), 0.5 penalize faces with quality Normals, Curvature and Orientation > Re-Orient all faces coherently (note that this will only work for manifold objects). To approximate accurately the original shape only with well shaped triangles you require a higher number of faces with respect to allowing more freedom in the final triangle shape.

Quality threshold affects the simplification penalizing bad shaped faces. Keep this below 1 million.Įnter a value between 0 and 1 here the higher the value the harder MeshLab tries to stick to your original model's shape. Target number of faces - Self explanatory.

Combine stl files in meshlab