Skip to content

write_mesh

write_mesh(file, V, F, UV=None, Ft=None, N=None, Fn=None, C=None, binary=True, fmt=None, writer=None)

Writes a mesh to a file.

If you have the approproate C++ extensions installed, this will use a fast C++-based writer. If you do not, this will use a slow python writer.

Currently only supports triangle meshes.

Parameters:

Name Type Description Default
file string

the path the mesh will be written to

 required
V (n,3) numpy array

vertex list of a triangle mesh

 required
F (m,3) numpy int array

face index list of a triangle mesh (into V)

 required
UV (n_uv,2) numpy array, optional (default

vertex list for texture coordinates. Only supported for obj format.

 None
Ft (m,3) numpy int array, optional (default

face index list for texture coordinates (into UV). Only supported for obj format.

 None
N (n_n,3) numpy array, optional (default

vertex list for normal coordinates. Only supported for obj format.

 None
Fn (m,3) numpy int array, optional (default

face index list for normal coordinates (into N). Only supported for obj format.

 None
C (n,3) numpy array, optional (default

list of integer [0, 255] per-vertex colors. Only supported for ply format.

 None
stl_binary bool, optional (default

whether to write the file in binary format (as opposed to ascii). Only supported for stl and ply format.

 required
fmt string, optional (default

The file format of the mesh to write. If None, try to guess the format from the file extension. Supported formats: obj, stl

 None
writer string, optional (default

Which writer engine to use. None, 'C++' or 'Python'. If None, will use C++ if available, and else Python.

 None

Returns:

Type Description
Examples
--------
V, F
gpytoolbox.write_mesh(obj, V, F)
Source code in src/gpytoolbox/write_mesh.py 
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
def write_mesh(file,
    V,
    F,
    UV=None,
    Ft=None,
    N=None,
    Fn=None,
    C=None,
    binary=True,
    fmt=None,
    writer=None):
    """Writes a mesh to a file.

    If you have the approproate C++ extensions installed, this will use a fast
    C++-based writer. If you do not, this will use a slow python writer.

    Currently only supports triangle meshes.

    Parameters
    ----------
    file : string
        the path the mesh will be written to
    V : (n,3) numpy array
        vertex list of a triangle mesh
    F : (m,3) numpy int array
        face index list of a triangle mesh (into V)
    UV : (n_uv,2) numpy array, optional (default: None)
        vertex list for texture coordinates. Only supported for obj format.
    Ft : (m,3) numpy int array, optional (default: None)
        face index list for texture coordinates (into UV). Only supported for obj format.
    N : (n_n,3) numpy array, optional (default: None)
        vertex list for normal coordinates. Only supported for obj format.
    Fn : (m,3) numpy int array, optional (default: None)
        face index list for normal coordinates (into N). Only supported for obj format.
    C : (n,3) numpy array, optional (default: None)
        list of integer [0, 255] per-vertex colors. Only supported for ply format.
    stl_binary : bool, optional (default: True)
        whether to write the file in binary format (as opposed to ascii). Only supported for stl and ply format.
    fmt : string, optional (default: None)
        The file format of the mesh to write.
        If None, try to guess the format from the file extension.
        Supported formats: obj, stl
    writer : string, optional (default: None)
        Which writer engine to use. None, 'C++' or 'Python'.
        If None, will use C++ if available, and else Python.

    Returns
    -------

    Examples
    --------
    ```python
    # Write a mesh in OBJ format
    V, F = regular_square_mesh(10)
    gpytoolbox.write_mesh('mesh.obj',V,F)
    ```
    """

    # Detect format if it has not been specified
    if fmt is None:
        _, fmt = os.path.splitext(file)
    fmt = fmt[1:].lower()

    # Call appropriate helper function to read mesh
    if fmt=='obj':
        _write_obj(file,V,F,UV,Ft,N,Fn,writer)
    elif fmt=='stl':
        _write_stl(file,V,F,binary)
    elif fmt=='ply':
        _write_ply(file,V,F,N,C,binary)
    else:
        assert False, "Mesh format not supported."