write_test()
{
int i,j;
PlyFile *ply;
int nelems;
char **elist;
int file_type;
float version;
int nverts = sizeof (verts) / sizeof (Vertex);
int nfaces = sizeof (faces) / sizeof (Face);
/* create the vertex index lists for the faces */
for (i = 0; i < nfaces; i++)
faces[i].verts = vert_ptrs[i];
/* open either a binary or ascii PLY file for writing */
/* (the file will be called "test.ply" because the routines */
/* enforce the .ply filename extension) */
#if 1
ply = ply_open_for_writing("test", 2, elem_names, PLY_ASCII, &version);
#else
ply = ply_open_for_writing("test", 2, elem_names, PLY_BINARY_BE, &version);
#endif
/* describe what properties go into the vertex and face elements */
ply_element_count (ply, "vertex", nverts);
ply_describe_property (ply, "vertex", &vert_props[0]);
ply_describe_property (ply, "vertex", &vert_props[1]);
ply_describe_property (ply, "vertex", &vert_props[2]);
ply_element_count (ply, "face", nfaces);
ply_describe_property (ply, "face", &face_props[0]);
ply_describe_property (ply, "face", &face_props[1]);
/* write a comment and an object information field */
ply_put_comment (ply, "author: Greg Turk");
ply_put_obj_info (ply, "random information");
/* we have described exactly what we will put in the file, so */
/* we are now done with the header info */
ply_header_complete (ply);
/* set up and write the vertex elements */
ply_put_element_setup (ply, "vertex");
for (i = 0; i < nverts; i++)
ply_put_element (ply, (void *) &verts[i]);
/* set up and write the face elements */
ply_put_element_setup (ply, "face");
for (i = 0; i < nfaces; i++)
ply_put_element (ply, (void *) &faces[i]);
/* close the PLY file */
ply_close (ply);
}
void
write_file()
{
int i,j,k;
PlyFile *ply;
int num_elems;
char *elem_name;
/*** Write out the final PLY object ***/
ply = ply_write (stdout, nelems, elist, file_type);
/* describe what properties go into the vertex and face elements */
ply_element_count (ply, "vertex", nverts);
ply_describe_property (ply, "vertex", &vert_props[0]);
ply_describe_property (ply, "vertex", &vert_props[1]);
ply_describe_property (ply, "vertex", &vert_props[2]);
ply_describe_property (ply, "vertex", &vert_props[3]);
ply_describe_property (ply, "vertex", &vert_props[4]);
ply_describe_property (ply, "vertex", &vert_props[5]);
ply_describe_other_properties (ply, vert_other, offsetof(Vertex,other_props));
ply_element_count (ply, "face", nfaces);
ply_describe_property (ply, "face", &face_props[0]);
ply_describe_other_properties (ply, face_other, offsetof(Face,other_props));
ply_describe_other_elements (ply, other_elements);
for (i = 0; i < num_comments; i++)
ply_put_comment (ply, comments[i]);
for (i = 0; i < num_obj_info; i++)
ply_put_obj_info (ply, obj_info[i]);
ply_header_complete (ply);
/* set up and write the vertex elements */
ply_put_element_setup (ply, "vertex");
for (i = 0; i < nverts; i++)
ply_put_element (ply, (void *) vlist[i]);
/* set up and write the face elements */
ply_put_element_setup (ply, "face");
for (i = 0; i < nfaces; i++)
ply_put_element (ply, (void *) flist[i]);
ply_put_other_elements (ply);
/* close the PLY file */
ply_close (ply);
}
IGL_INLINE bool igl::writePLY(
const std::string & filename,
const Eigen::PlainObjectBase<DerivedV> & V,
const Eigen::PlainObjectBase<DerivedF> & F,
const Eigen::PlainObjectBase<DerivedN> & N,
const Eigen::PlainObjectBase<DerivedUV> & UV,
const bool ascii)
{
// Largely based on obj2ply.c
typedef struct Vertex
{
double x,y,z,w; /* position */
double nx,ny,nz; /* surface normal */
double s,t; /* texture coordinates */
} Vertex;
typedef struct Face
{
unsigned char nverts; /* number of vertex indices in list */
int *verts; /* vertex index list */
} Face;
PlyProperty vert_props[] =
{ /* list of property information for a vertex */
{"x", PLY_DOUBLE, PLY_DOUBLE, offsetof(Vertex,x), 0, 0, 0, 0},
{"y", PLY_DOUBLE, PLY_DOUBLE, offsetof(Vertex,y), 0, 0, 0, 0},
{"z", PLY_DOUBLE, PLY_DOUBLE, offsetof(Vertex,z), 0, 0, 0, 0},
{"nx", PLY_DOUBLE, PLY_DOUBLE, offsetof(Vertex,nx), 0, 0, 0, 0},
{"ny", PLY_DOUBLE, PLY_DOUBLE, offsetof(Vertex,ny), 0, 0, 0, 0},
{"nz", PLY_DOUBLE, PLY_DOUBLE, offsetof(Vertex,nz), 0, 0, 0, 0},
{"s", PLY_DOUBLE, PLY_DOUBLE, offsetof(Vertex,s), 0, 0, 0, 0},
{"t", PLY_DOUBLE, PLY_DOUBLE, offsetof(Vertex,t), 0, 0, 0, 0},
};
PlyProperty face_props[] =
{ /* list of property information for a face */
{"vertex_indices", PLY_INT, PLY_INT, offsetof(Face,verts),
1, PLY_UCHAR, PLY_UCHAR, offsetof(Face,nverts)},
};
const bool has_normals = N.rows() > 0;
const bool has_texture_coords = UV.rows() > 0;
std::vector<Vertex> vlist(V.rows());
std::vector<Face> flist(F.rows());
for(size_t i = 0;i<(size_t)V.rows();i++)
{
vlist[i].x = V(i,0);
vlist[i].y = V(i,1);
vlist[i].z = V(i,2);
if(has_normals)
{
vlist[i].nx = N(i,0);
vlist[i].ny = N(i,1);
vlist[i].nz = N(i,2);
}
if(has_texture_coords)
{
vlist[i].s = UV(i,0);
vlist[i].t = UV(i,1);
}
}
for(size_t i = 0;i<(size_t)F.rows();i++)
{
flist[i].nverts = F.cols();
flist[i].verts = new int[F.cols()];
for(size_t c = 0;c<(size_t)F.cols();c++)
{
flist[i].verts[c] = F(i,c);
}
}
const char * elem_names[] = {"vertex","face"};
FILE * fp = fopen(filename.c_str(),"w");
if(fp==NULL)
{
return false;
}
PlyFile * ply = ply_write(fp, 2,elem_names,
(ascii ? PLY_ASCII : PLY_BINARY_LE));
if(ply==NULL)
{
return false;
}
std::vector<PlyProperty> plist;
plist.push_back(vert_props[0]);
plist.push_back(vert_props[1]);
plist.push_back(vert_props[2]);
if (has_normals)
{
plist.push_back(vert_props[3]);
plist.push_back(vert_props[4]);
plist.push_back(vert_props[5]);
}
if (has_texture_coords)
{
plist.push_back(vert_props[6]);
plist.push_back(vert_props[7]);
}
ply_describe_element(ply, "vertex", V.rows(),plist.size(),
&plist[0]);
ply_describe_element(ply, "face", F.rows(),1,&face_props[0]);
ply_header_complete(ply);
int native_binary_type = get_native_binary_type2();
ply_put_element_setup(ply, "vertex");
for(const auto v : vlist)
{
ply_put_element(ply, (void *) &v, &native_binary_type);
}
ply_put_element_setup(ply, "face");
for(const auto f : flist)
{
ply_put_element(ply, (void *) &f, &native_binary_type);
}
ply_close(ply);
for(size_t i = 0;i<(size_t)F.rows();i++)
{
delete[] flist[i].verts;
}
return true;
}
