Writes the given mesh to an OBJ file, supports outputting normals
(
mesh: &MeshWithData<R, M>,
filename: P,
)
| 15 | |
| 16 | /// Writes the given mesh to an OBJ file, supports outputting normals |
| 17 | pub fn mesh_to_obj<R: Real, M: Mesh3d<R>, P: AsRef<Path>>( |
| 18 | mesh: &MeshWithData<R, M>, |
| 19 | filename: P, |
| 20 | ) -> Result<(), anyhow::Error> { |
| 21 | profile!("mesh_to_obj"); |
| 22 | let file = fs::OpenOptions::new() |
| 23 | .read(true) |
| 24 | .write(true) |
| 25 | .create(true) |
| 26 | .truncate(true) |
| 27 | .open(filename) |
| 28 | .context("Failed to open file handle for writing OBJ file")?; |
| 29 | let mut writer = BufWriter::with_capacity(100000, file); |
| 30 | |
| 31 | let mesh_vertices = &mesh.mesh; |
| 32 | |
| 33 | for v in mesh_vertices.vertices() { |
| 34 | writeln!(&mut writer, "v {} {} {}", v.x, v.y, v.z)?; |
| 35 | } |
| 36 | |
| 37 | let normals = mesh |
| 38 | .point_attributes |
| 39 | .iter() |
| 40 | .find(|attrib| attrib.name == "normals"); |
| 41 | |
| 42 | if let Some(normals) = normals { |
| 43 | if let OwnedAttributeData::Vector3Real(normals) = &normals.data { |
| 44 | for n in normals.iter() { |
| 45 | writeln!(&mut writer, "vn {} {} {}", n.x, n.y, n.z)?; |
| 46 | } |
| 47 | } |
| 48 | } |
| 49 | |
| 50 | if normals.is_some() { |
| 51 | for f in mesh_vertices.cells() { |
| 52 | write!(writer, "f")?; |
| 53 | f.vertices() |
| 54 | .iter() |
| 55 | .copied() |
| 56 | .try_for_each(|v| write!(writer, " {}//{}", v + 1, v + 1))?; |
| 57 | writeln!(writer)?; |
| 58 | } |
| 59 | } else { |
| 60 | for f in mesh_vertices.cells() { |
| 61 | write!(writer, "f")?; |
| 62 | f.vertices() |
| 63 | .iter() |
| 64 | .copied() |
| 65 | .try_for_each(|v| write!(writer, " {}", v + 1))?; |
| 66 | writeln!(writer)?; |
| 67 | } |
| 68 | } |
| 69 | |
| 70 | Ok(()) |
| 71 | } |
| 72 | |
| 73 | pub fn surface_mesh_from_obj<R: Real, P: AsRef<Path>>( |
| 74 | obj_path: P, |