int main(int argc, char** argv){
if(argc!=3){
cout << "usage:" << endl << "isoremesh bunny.obj remeshed.obj" << endl;
return EXIT_FAILURE;
}
std::string input(argv[1]);
std::string output(argv[2]);
///--- Load mesh
Surface_mesh mesh;
mesh.read(input);
if(mesh.n_vertices()==0){
cout << "Input mesh has 0 vertices" << endl;
return EXIT_FAILURE;
}
///--- Remesher is only for triangulations!
mesh.triangulate();
///--- Compute bounding box
Scalar bbox_diag_length = bounding_box(mesh).diagonal().norm();
cout << "#vertices: " << mesh.n_vertices() << endl;
cout << "bbox_diag_length: " << bbox_diag_length << endl;
///--- Perform remeshing
IsotropicRemesher remesher(mesh);
remesher.num_iterations = 10;
remesher.sharp_feature_deg = 45;
remesher.longest_edge_length = 0.02*bbox_diag_length;
remesher.keep_short_edges = false;
remesher.reproject_to_surface = true;
remesher.myout = &std::cout; ///< print output to...
remesher.execute();
///--- Write to file
mesh.write(output);
return EXIT_SUCCESS;
}
bool write_off(const Surface_mesh& mesh, const std::string& filename)
{
FILE* out = fopen(filename.c_str(), "w");
if (!out)
return false;
// header
fprintf(out, "OFF\n%d %d 0\n", mesh.n_vertices(), mesh.n_faces());
// vertices
Surface_mesh::Vertex_property<Surface_mesh::Point> points = mesh.get_vertex_property<Point>("v:point");
for (Surface_mesh::Vertex_iterator vit=mesh.vertices_begin(); vit!=mesh.vertices_end(); ++vit)
{
const Point& p = points[vit];
fprintf(out, "%.10f %.10f %.10f\n", p[0], p[1], p[2]);
}
// faces
for (Surface_mesh::Face_iterator fit=mesh.faces_begin(); fit!=mesh.faces_end(); ++fit)
{
int nV = mesh.valence(fit);
fprintf(out, "%d", nV);
Surface_mesh::Vertex_around_face_circulator fvit=mesh.vertices(fit), fvend=fvit;
do
{
fprintf(out, " %d", ((Surface_mesh::Vertex)fvit).idx());
}
while (++fvit != fvend);
fprintf(out, "\n");
}
fclose(out);
return true;
}
bool read_off(Surface_mesh& mesh, const std::string& filename)
{
int err = 0;
unsigned int i, j, idx;
unsigned int nV, nF, nE;
Eigen::Vector3d p, n;
Eigen::Vector2d t;
Surface_mesh::Vertex v;
char line[100], *c;
bool has_texcoords = false;
bool has_normals = false;
bool has_colors = false;
bool has_hcoords = false;
bool has_dim = false;
bool is_binary = false;
// if mesh is not empty we need an offset for vertex indices
const unsigned int voffset = mesh.n_vertices();
// open file (in ASCII mode)
FILE* in = fopen(filename.c_str(), "r");
if (!in) return false;
// read header: [ST][C][N][4][n]OFF BINARY
c = fgets(line, 100, in);
assert(c != NULL);
c = line;
if (c[0] == 'S' && c[1] == 'T') {
has_texcoords = true;
c += 2;
}
if (c[0] == 'C') {
has_colors = true;
++c;
}
if (c[0] == 'N') {
has_normals = true;
++c;
}
if (c[0] == '4') {
has_hcoords = true;
++c;
}
if (c[0] == 'n') {
has_dim = true;
++c;
}
if (strncmp(c, "OFF", 3) != 0) {
fclose(in); // no OFF
return false;
}
if (strncmp(c+4, "BINARY", 6) == 0) is_binary = true;
const bool binary = is_binary; // const might speed things up
// colors, homogeneous coords, and vertex dimension != 3 are not supported
if (has_colors || has_hcoords || has_dim)
{
fclose(in);
return false;
}
// properties
Surface_mesh::Vertex_property<Surface_mesh::Normal> normals;
Surface_mesh::Vertex_property<Surface_mesh::Texture_coordinate> texcoords;
if (has_normals) normals = mesh.vertex_property<Surface_mesh::Normal>("v:normal");
if (has_texcoords) texcoords = mesh.vertex_property<Surface_mesh::Texture_coordinate>("v:texcoord");
// if binary: reopen file in binary mode
if (binary)
{
fclose(in);
in = fopen(filename.c_str(), "rb");
c = fgets(line, 100, in);
assert(c != NULL);
}
// (ennetws) bug fix for comments, empty lines..
while(!binary && true && !feof(in)) {
fgets(line, 100, in);
if(strlen(line) > 4 && line[0] != '#')
break;
}
// #Vertice, #Faces, #Edges
if (binary)
{
read(in, nV);
read(in, nF);
read(in, nE);
}
else
{
err = sscanf(line, "%d %d %d", (int*)&nV, (int*)&nF, (int*)&nE); // (ennetws) bug fix
}
mesh.reserve(nV, std::max(3*nV, nE), nF);
// read vertices: pos [norma] [texcoord]
if (has_normals && has_texcoords)
{
for (i=0; i<nV && !feof(in); ++i)
{
if (binary)
{
read(in, p);
read(in, n);
read(in, t);
}
else
{
err = fscanf(in, "%lf %lf %lf %lf %lf %lf %lf %lf", &p[0], &p[1], &p[2], &n[0], &n[1], &n[2], &t[0], &t[1]);
}
v = mesh.add_vertex(p);
normals[v] = n;
texcoords[v][0] = t[0];
texcoords[v][1] = t[1];
}
}
else if (has_normals)
{
for (i=0; i<nV && !feof(in); ++i)
{
if (binary)
{
read(in, p);
read(in, n);
}
else
{
err = fscanf(in, "%lf %lf %lf %lf %lf %lf", &p[0], &p[1], &p[2], &n[0], &n[1], &n[2]);
}
v = mesh.add_vertex(p);
normals[v] = n;
}
}
else if (has_texcoords)
{
for (i=0; i<nV && !feof(in); ++i)
{
if (binary)
{
read(in, p);
read(in, t);
}
else
{
err = fscanf(in, "%lf %lf %lf %lf %lf", &p[0], &p[1], &p[2], &t[0], &t[1]);
}
v = mesh.add_vertex(p);
texcoords[v][0] = t[0];
texcoords[v][1] = t[1];
}
}
else
{
for (i=0; i<nV && !feof(in); ++i)
{
if (binary)
{
read(in, p);
}
else
{
err = fscanf(in, "%lf %lf %lf", &p[0], &p[1], &p[2]);
}
mesh.add_vertex(p);
}
}
// read faces: #N v[1] v[2] ... v[n-1]
std::vector<Surface_mesh::Vertex> vertices;
for (i=0; i<nF; ++i)
{
if (binary)
{
read(in, nV);
vertices.resize(nV);
for (j=0; j<nV; ++j)
{
read(in, idx);
vertices[j] = Surface_mesh::Vertex(idx+voffset);
}
}
else
{
err = fscanf(in, "%d", (int*)&nV);
vertices.resize(nV);
for (j=0; j<nV; ++j)
{
err = fscanf(in, "%d", (int*)&idx);
vertices[j] = Surface_mesh::Vertex(idx+voffset);
}
}
mesh.add_face(vertices);
}
// File was successfully parsed.
fclose(in);
return true;
}
