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(); }