bool read_off_ascii(Surface_mesh& mesh,
FILE* in,
const bool has_normals,
const bool has_texcoords,
const bool has_colors,
NamedParameters& np)
{
char line[100], *lp;
unsigned int i, j, items, idx, nc;
unsigned int nV, nF, nE;
Vec3f p, n, c;
Vec2f t;
Surface_mesh::Vertex v;
typename CGAL::Polygon_mesh_processing::GetVertexPointMap<Surface_mesh, NamedParameters>::const_type
vpm = choose_param(get_param(np, CGAL::boost::internal_np::vertex_point),
get_const_property_map(CGAL::vertex_point, mesh));
// properties
Surface_mesh::Vertex_property<Normal> normals;
Surface_mesh::Vertex_property<Texture_coordinate> texcoords;
Surface_mesh::Vertex_property<Color> colors;
if (has_normals) normals = mesh.vertex_property<Normal>("v:normal");
if (has_texcoords) texcoords = mesh.vertex_property<Texture_coordinate>("v:texcoord");
if (has_colors) colors = mesh.vertex_property<Color>("v:color");
// #Vertice, #Faces, #Edges
items = fscanf(in, "%d %d %d\n", (int*)&nV, (int*)&nF, (int*)&nE);
mesh.clear();
mesh.reserve(nV, std::max(3*nV, nE), nF);
// read vertices: pos [normal] [color] [texcoord]
for (i=0; i<nV && !feof(in); ++i)
{
// read line
lp = fgets(line, 100, in);
// position
items = sscanf(lp, "%f %f %f%n", &p[0], &p[1], &p[2], &nc);
assert(items==3);
Surface_mesh::Vertex v = mesh.add_vertex();
put(vpm, v, (Point)p);
lp += nc;
// normal
if (has_normals)
{
if (sscanf(lp, "%f %f %f%n", &n[0], &n[1], &n[2], &nc) == 3)
{
normals[v] = n;
}
lp += nc;
}
// color
if (has_colors)
{
if (sscanf(lp, "%f %f %f%n", &c[0], &c[1], &c[2], &nc) == 3)
{
if (c[0]>1.0f || c[1]>1.0f || c[2]>1.0f) c *= (1.0/255.0);
colors[v] = c;
}
lp += nc;
}
// tex coord
if (has_texcoords)
{
items = sscanf(lp, "%f %f%n", &t[0], &t[1], &nc);
assert(items == 2);
texcoords[v][0] = t[0];
texcoords[v][1] = t[1];
lp += nc;
}
}
// read faces: #N v[1] v[2] ... v[n-1]
std::vector<Surface_mesh::Vertex> vertices;
for (i=0; i<nF; ++i)
{
// read line
lp = fgets(line, 100, in);
// #vertices
items = sscanf(lp, "%d%n", (int*)&nV, &nc);
assert(items == 1);
vertices.resize(nV);
lp += nc;
// indices
for (j=0; j<nV; ++j)
{
items = sscanf(lp, "%d%n", (int*)&idx, &nc);
assert(items == 1);
vertices[j] = Surface_mesh::Vertex(idx);
lp += nc;
}
mesh.add_face(vertices);
}
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;
}
bool read_off_binary(Surface_mesh& mesh,
FILE* in,
const bool has_normals,
const bool has_texcoords,
const bool has_colors,
NamedParameters& np)
{
unsigned int i, j, idx;
unsigned int nV, nF, nE;
Vec3f p, n, c;
Vec2f t;
Surface_mesh::Vertex v;
// binary cannot (yet) read colors
if (has_colors) return false;
// properties
Surface_mesh::Vertex_property<Normal> normals;
Surface_mesh::Vertex_property<Texture_coordinate> texcoords;
if (has_normals) normals = mesh.vertex_property<Normal>("v:normal");
if (has_texcoords) texcoords = mesh.vertex_property<Texture_coordinate>("v:texcoord");
typename CGAL::Polygon_mesh_processing::GetVertexPointMap<Surface_mesh, NamedParameters>::const_type
vpm = choose_param(get_param(np, CGAL::boost::internal_np::vertex_point),
get_const_property_map(CGAL::vertex_point, mesh));
// #Vertice, #Faces, #Edges
read(in, nV);
read(in, nF);
read(in, nE);
mesh.clear();
mesh.reserve(nV, std::max(3*nV, nE), nF);
// read vertices: pos [normal] [color] [texcoord]
for (i=0; i<nV && !feof(in); ++i)
{
// position
read(in, p);
Surface_mesh::Vertex v = mesh.add_vertex();
put(vpm, v, (Point)p);
// normal
if (has_normals)
{
read(in, n);
normals[v] = n;
}
// tex coord
if (has_texcoords)
{
read(in, t);
texcoords[v][0] = t[0];
texcoords[v][1] = t[1];
}
}
// read faces: #N v[1] v[2] ... v[n-1]
std::vector<Surface_mesh::Vertex> vertices;
for (i=0; i<nF; ++i)
{
read(in, nV);
vertices.resize(nV);
for (j=0; j<nV; ++j)
{
read(in, idx);
vertices[j] = Surface_mesh::Vertex(idx);
}
mesh.add_face(vertices);
}
return true;
}
