void ColladaSerializer::ColladaExporter::ColladaGeometries::write(const std::string mesh_id, const std::string& default_material_name, const std::vector<double>& positions, const std::vector<double>& normals, const std::vector<int>& indices, const std::vector<int> material_ids, const std::vector<IfcGeom::Material>& materials) {
// The goal of the IfcGeom::Iterator is to filter out empty geometries, but
// since this function would crash trying to deference the material_ids in
// that case, a hard return statement is added just in case.
if (indices.empty()) return;
openMesh(mesh_id);
// The normals vector can be empty for example when the WELD_VERTICES setting is used.
// IfcOpenShell does not provide them with multiple face normals collapsed into a single vertex.
const bool has_normals = !normals.empty();
addFloatSource(mesh_id, COLLADASW::LibraryGeometries::POSITIONS_SOURCE_ID_SUFFIX, positions);
if (has_normals) {
addFloatSource(mesh_id, COLLADASW::LibraryGeometries::NORMALS_SOURCE_ID_SUFFIX, normals);
}
COLLADASW::VerticesElement vertices(mSW);
vertices.setId(mesh_id + COLLADASW::LibraryGeometries::VERTICES_ID_SUFFIX );
vertices.getInputList().push_back(COLLADASW::Input(COLLADASW::InputSemantic::POSITION, "#" + mesh_id + COLLADASW::LibraryGeometries::POSITIONS_SOURCE_ID_SUFFIX));
vertices.add();
std::vector<int>::const_iterator index_range_start = indices.begin();
std::vector<int>::const_iterator material_it = material_ids.begin();
int previous_material_id = -1;
for (std::vector<int>::const_iterator it = indices.begin(); ; it += 3) {
const int current_material_id = *(material_it++);
const int num_triangles = std::distance(index_range_start, it) / 3;
if ((previous_material_id != current_material_id && num_triangles > 0) || (it == indices.end())) {
COLLADASW::Triangles triangles(mSW);
triangles.setMaterial(materials[previous_material_id].name());
triangles.setCount(num_triangles);
int offset = 0;
triangles.getInputList().push_back(COLLADASW::Input(COLLADASW::InputSemantic::VERTEX,"#" + mesh_id + COLLADASW::LibraryGeometries::VERTICES_ID_SUFFIX, offset++ ) );
if (has_normals) {
triangles.getInputList().push_back(COLLADASW::Input(COLLADASW::InputSemantic::NORMAL,"#" + mesh_id + COLLADASW::LibraryGeometries::NORMALS_SOURCE_ID_SUFFIX, offset++ ) );
}
triangles.prepareToAppendValues();
for (std::vector<int>::const_iterator jt = index_range_start; jt != it; ++jt) {
const int idx = *jt;
if (has_normals) {
triangles.appendValues(idx, idx);
} else {
triangles.appendValues(idx);
}
}
triangles.finish();
index_range_start = it;
}
previous_material_id = current_material_id;
if (it == indices.end()) {
break;
}
}
closeMesh();
closeGeometry();
}
void ColladaSerializer::ColladaExporter::ColladaGeometries::write(const std::string mesh_id, const std::string& default_material_name, const std::vector<double>& positions, const std::vector<double>& normals, const std::vector<int>& faces, const std::vector<int>& edges, const std::vector<int> material_ids, const std::vector<IfcGeom::Material>& materials) {
openMesh(mesh_id);
// The normals vector can be empty for example when the WELD_VERTICES setting is used.
// IfcOpenShell does not provide them with multiple face normals collapsed into a single vertex.
const bool has_normals = !normals.empty();
addFloatSource(mesh_id, COLLADASW::LibraryGeometries::POSITIONS_SOURCE_ID_SUFFIX, positions);
if (has_normals) {
addFloatSource(mesh_id, COLLADASW::LibraryGeometries::NORMALS_SOURCE_ID_SUFFIX, normals);
}
COLLADASW::VerticesElement vertices(mSW);
vertices.setId(mesh_id + COLLADASW::LibraryGeometries::VERTICES_ID_SUFFIX );
vertices.getInputList().push_back(COLLADASW::Input(COLLADASW::InputSemantic::POSITION, "#" + mesh_id + COLLADASW::LibraryGeometries::POSITIONS_SOURCE_ID_SUFFIX));
vertices.add();
std::vector<int>::const_iterator index_range_start = faces.begin();
std::vector<int>::const_iterator material_it = material_ids.begin();
int previous_material_id = -1;
for (std::vector<int>::const_iterator it = faces.begin(); !faces.empty(); it += 3) {
const int current_material_id = *(material_it++);
const unsigned long num_triangles = (unsigned long)std::distance(index_range_start, it) / 3;
if ((previous_material_id != current_material_id && num_triangles > 0) || (it == faces.end())) {
COLLADASW::Triangles triangles(mSW);
triangles.setMaterial(materials[previous_material_id].name());
triangles.setCount(num_triangles);
int offset = 0;
triangles.getInputList().push_back(COLLADASW::Input(COLLADASW::InputSemantic::VERTEX,"#" + mesh_id + COLLADASW::LibraryGeometries::VERTICES_ID_SUFFIX, offset++ ) );
if (has_normals) {
triangles.getInputList().push_back(COLLADASW::Input(COLLADASW::InputSemantic::NORMAL,"#" + mesh_id + COLLADASW::LibraryGeometries::NORMALS_SOURCE_ID_SUFFIX, offset++ ) );
}
triangles.prepareToAppendValues();
for (std::vector<int>::const_iterator jt = index_range_start; jt != it; ++jt) {
const int idx = *jt;
if (has_normals) {
triangles.appendValues(idx, idx);
} else {
triangles.appendValues(idx);
}
}
triangles.finish();
index_range_start = it;
}
previous_material_id = current_material_id;
if (it == faces.end()) {
break;
}
}
std::set<int> faces_set (faces.begin(), faces.end());
typedef std::vector< std::pair<int, std::vector<unsigned long> > > linelist_t;
linelist_t linelist;
int num_lines = 0;
for ( std::vector<int>::const_iterator it = edges.begin(); it != edges.end(); ++num_lines) {
const int i1 = *(it++);
const int i2 = *(it++);
if (faces_set.find(i1) != faces_set.end() || faces_set.find(i2) != faces_set.end()) {
continue;
}
const int current_material_id = *(material_it++);
if ((previous_material_id != current_material_id) || (num_lines == 0)) {
linelist.resize(linelist.size() + 1);
}
linelist.rbegin()->second.push_back(i1);
linelist.rbegin()->second.push_back(i2);
}
for (linelist_t::const_iterator it = linelist.begin(); it != linelist.end(); ++it) {
COLLADASW::Lines lines(mSW);
lines.setMaterial(materials[it->first].name());
lines.setCount((unsigned long)it->second.size());
int offset = 0;
lines.getInputList().push_back(COLLADASW::Input(COLLADASW::InputSemantic::VERTEX, "#" + mesh_id + COLLADASW::LibraryGeometries::VERTICES_ID_SUFFIX, 0));
lines.prepareToAppendValues();
lines.appendValues(it->second);
lines.finish();
}
closeMesh();
closeGeometry();
}
