diff options
Diffstat (limited to 'source/blender/io/wavefront_obj/exporter')
6 files changed, 395 insertions, 202 deletions
diff --git a/source/blender/io/wavefront_obj/exporter/obj_export_file_writer.cc b/source/blender/io/wavefront_obj/exporter/obj_export_file_writer.cc index d31353c4a76..4f5321019d5 100644 --- a/source/blender/io/wavefront_obj/exporter/obj_export_file_writer.cc +++ b/source/blender/io/wavefront_obj/exporter/obj_export_file_writer.cc @@ -52,68 +52,75 @@ const char *DEFORM_GROUP_DISABLED = "off"; * So an empty material name is written. */ const char *MATERIAL_GROUP_DISABLED = ""; -void OBJWriter::write_vert_uv_normal_indices(Span<int> vert_indices, +void OBJWriter::write_vert_uv_normal_indices(FormatHandler<eFileType::OBJ> &fh, + const IndexOffsets &offsets, + Span<int> vert_indices, Span<int> uv_indices, Span<int> normal_indices) const { BLI_assert(vert_indices.size() == uv_indices.size() && vert_indices.size() == normal_indices.size()); - file_handler_->write<eOBJSyntaxElement::poly_element_begin>(); + fh.write<eOBJSyntaxElement::poly_element_begin>(); for (int j = 0; j < vert_indices.size(); j++) { - file_handler_->write<eOBJSyntaxElement::vertex_uv_normal_indices>( - vert_indices[j] + index_offsets_.vertex_offset + 1, - uv_indices[j] + index_offsets_.uv_vertex_offset + 1, - normal_indices[j] + index_offsets_.normal_offset + 1); + fh.write<eOBJSyntaxElement::vertex_uv_normal_indices>( + vert_indices[j] + offsets.vertex_offset + 1, + uv_indices[j] + offsets.uv_vertex_offset + 1, + normal_indices[j] + offsets.normal_offset + 1); } - file_handler_->write<eOBJSyntaxElement::poly_element_end>(); + fh.write<eOBJSyntaxElement::poly_element_end>(); } -void OBJWriter::write_vert_normal_indices(Span<int> vert_indices, +void OBJWriter::write_vert_normal_indices(FormatHandler<eFileType::OBJ> &fh, + const IndexOffsets &offsets, + Span<int> vert_indices, Span<int> /*uv_indices*/, Span<int> normal_indices) const { BLI_assert(vert_indices.size() == normal_indices.size()); - file_handler_->write<eOBJSyntaxElement::poly_element_begin>(); + fh.write<eOBJSyntaxElement::poly_element_begin>(); for (int j = 0; j < vert_indices.size(); j++) { - file_handler_->write<eOBJSyntaxElement::vertex_normal_indices>( - vert_indices[j] + index_offsets_.vertex_offset + 1, - normal_indices[j] + index_offsets_.normal_offset + 1); + fh.write<eOBJSyntaxElement::vertex_normal_indices>(vert_indices[j] + offsets.vertex_offset + 1, + normal_indices[j] + offsets.normal_offset + + 1); } - file_handler_->write<eOBJSyntaxElement::poly_element_end>(); + fh.write<eOBJSyntaxElement::poly_element_end>(); } -void OBJWriter::write_vert_uv_indices(Span<int> vert_indices, +void OBJWriter::write_vert_uv_indices(FormatHandler<eFileType::OBJ> &fh, + const IndexOffsets &offsets, + Span<int> vert_indices, Span<int> uv_indices, Span<int> /*normal_indices*/) const { BLI_assert(vert_indices.size() == uv_indices.size()); - file_handler_->write<eOBJSyntaxElement::poly_element_begin>(); + fh.write<eOBJSyntaxElement::poly_element_begin>(); for (int j = 0; j < vert_indices.size(); j++) { - file_handler_->write<eOBJSyntaxElement::vertex_uv_indices>( - vert_indices[j] + index_offsets_.vertex_offset + 1, - uv_indices[j] + index_offsets_.uv_vertex_offset + 1); + fh.write<eOBJSyntaxElement::vertex_uv_indices>(vert_indices[j] + offsets.vertex_offset + 1, + uv_indices[j] + offsets.uv_vertex_offset + 1); } - file_handler_->write<eOBJSyntaxElement::poly_element_end>(); + fh.write<eOBJSyntaxElement::poly_element_end>(); } -void OBJWriter::write_vert_indices(Span<int> vert_indices, +void OBJWriter::write_vert_indices(FormatHandler<eFileType::OBJ> &fh, + const IndexOffsets &offsets, + Span<int> vert_indices, Span<int> /*uv_indices*/, Span<int> /*normal_indices*/) const { - file_handler_->write<eOBJSyntaxElement::poly_element_begin>(); + fh.write<eOBJSyntaxElement::poly_element_begin>(); for (const int vert_index : vert_indices) { - file_handler_->write<eOBJSyntaxElement::vertex_indices>(vert_index + - index_offsets_.vertex_offset + 1); + fh.write<eOBJSyntaxElement::vertex_indices>(vert_index + offsets.vertex_offset + 1); } - file_handler_->write<eOBJSyntaxElement::poly_element_end>(); + fh.write<eOBJSyntaxElement::poly_element_end>(); } void OBJWriter::write_header() const { using namespace std::string_literals; - file_handler_->write<eOBJSyntaxElement::string>("# Blender "s + BKE_blender_version_string() + - "\n"); - file_handler_->write<eOBJSyntaxElement::string>("# www.blender.org\n"); + FormatHandler<eFileType::OBJ> fh; + fh.write<eOBJSyntaxElement::string>("# Blender "s + BKE_blender_version_string() + "\n"); + fh.write<eOBJSyntaxElement::string>("# www.blender.org\n"); + fh.write_to_file(outfile_); } void OBJWriter::write_mtllib_name(const StringRefNull mtl_filepath) const @@ -122,10 +129,13 @@ void OBJWriter::write_mtllib_name(const StringRefNull mtl_filepath) const char mtl_file_name[FILE_MAXFILE]; char mtl_dir_name[FILE_MAXDIR]; BLI_split_dirfile(mtl_filepath.data(), mtl_dir_name, mtl_file_name, FILE_MAXDIR, FILE_MAXFILE); - file_handler_->write<eOBJSyntaxElement::mtllib>(mtl_file_name); + FormatHandler<eFileType::OBJ> fh; + fh.write<eOBJSyntaxElement::mtllib>(mtl_file_name); + fh.write_to_file(outfile_); } -void OBJWriter::write_object_group(const OBJMesh &obj_mesh_data) const +void OBJWriter::write_object_group(FormatHandler<eFileType::OBJ> &fh, + const OBJMesh &obj_mesh_data) const { /* "o object_name" is not mandatory. A valid .OBJ file may contain neither * "o name" nor "g group_name". */ @@ -138,54 +148,52 @@ void OBJWriter::write_object_group(const OBJMesh &obj_mesh_data) const const char *object_material_name = obj_mesh_data.get_object_material_name(0); if (export_params_.export_materials && export_params_.export_material_groups && object_material_name) { - file_handler_->write<eOBJSyntaxElement::object_group>(object_name + "_" + object_mesh_name + - "_" + object_material_name); - return; + fh.write<eOBJSyntaxElement::object_group>(object_name + "_" + object_mesh_name + "_" + + object_material_name); + } + else { + fh.write<eOBJSyntaxElement::object_group>(object_name + "_" + object_mesh_name); } - file_handler_->write<eOBJSyntaxElement::object_group>(object_name + "_" + object_mesh_name); } -void OBJWriter::write_object_name(const OBJMesh &obj_mesh_data) const +void OBJWriter::write_object_name(FormatHandler<eFileType::OBJ> &fh, + const OBJMesh &obj_mesh_data) const { const char *object_name = obj_mesh_data.get_object_name(); if (export_params_.export_object_groups) { - write_object_group(obj_mesh_data); + write_object_group(fh, obj_mesh_data); return; } - file_handler_->write<eOBJSyntaxElement::object_name>(object_name); + fh.write<eOBJSyntaxElement::object_name>(object_name); } -void OBJWriter::write_vertex_coords(const OBJMesh &obj_mesh_data) const +void OBJWriter::write_vertex_coords(FormatHandler<eFileType::OBJ> &fh, + const OBJMesh &obj_mesh_data) const { const int tot_vertices = obj_mesh_data.tot_vertices(); for (int i = 0; i < tot_vertices; i++) { float3 vertex = obj_mesh_data.calc_vertex_coords(i, export_params_.scaling_factor); - file_handler_->write<eOBJSyntaxElement::vertex_coords>(vertex[0], vertex[1], vertex[2]); + fh.write<eOBJSyntaxElement::vertex_coords>(vertex[0], vertex[1], vertex[2]); } } -void OBJWriter::write_uv_coords(OBJMesh &r_obj_mesh_data) const +void OBJWriter::write_uv_coords(FormatHandler<eFileType::OBJ> &fh, OBJMesh &r_obj_mesh_data) const { - Vector<std::array<float, 2>> uv_coords; - /* UV indices are calculated and stored in an OBJMesh member here. */ - r_obj_mesh_data.store_uv_coords_and_indices(uv_coords); - - for (const std::array<float, 2> &uv_vertex : uv_coords) { - file_handler_->write<eOBJSyntaxElement::uv_vertex_coords>(uv_vertex[0], uv_vertex[1]); + for (const float2 &uv_vertex : r_obj_mesh_data.get_uv_coords()) { + fh.write<eOBJSyntaxElement::uv_vertex_coords>(uv_vertex[0], uv_vertex[1]); } } -void OBJWriter::write_poly_normals(OBJMesh &obj_mesh_data) +void OBJWriter::write_poly_normals(FormatHandler<eFileType::OBJ> &fh, OBJMesh &obj_mesh_data) { - obj_mesh_data.ensure_mesh_normals(); - Vector<float3> normals; - obj_mesh_data.store_normal_coords_and_indices(normals); - for (const float3 &normal : normals) { - file_handler_->write<eOBJSyntaxElement::normal>(normal[0], normal[1], normal[2]); + /* Poly normals should be calculated earlier via store_normal_coords_and_indices. */ + for (const float3 &normal : obj_mesh_data.get_normal_coords()) { + fh.write<eOBJSyntaxElement::normal>(normal[0], normal[1], normal[2]); } } -int OBJWriter::write_smooth_group(const OBJMesh &obj_mesh_data, +int OBJWriter::write_smooth_group(FormatHandler<eFileType::OBJ> &fh, + const OBJMesh &obj_mesh_data, const int poly_index, const int last_poly_smooth_group) const { @@ -203,11 +211,12 @@ int OBJWriter::write_smooth_group(const OBJMesh &obj_mesh_data, /* Group has already been written, even if it is "s 0". */ return current_group; } - file_handler_->write<eOBJSyntaxElement::smooth_group>(current_group); + fh.write<eOBJSyntaxElement::smooth_group>(current_group); return current_group; } -int16_t OBJWriter::write_poly_material(const OBJMesh &obj_mesh_data, +int16_t OBJWriter::write_poly_material(FormatHandler<eFileType::OBJ> &fh, + const OBJMesh &obj_mesh_data, const int poly_index, const int16_t last_poly_mat_nr, std::function<const char *(int)> matname_fn) const @@ -221,23 +230,25 @@ int16_t OBJWriter::write_poly_material(const OBJMesh &obj_mesh_data, if (last_poly_mat_nr == current_mat_nr) { return current_mat_nr; } + if (current_mat_nr == NOT_FOUND) { - file_handler_->write<eOBJSyntaxElement::poly_usemtl>(MATERIAL_GROUP_DISABLED); + fh.write<eOBJSyntaxElement::poly_usemtl>(MATERIAL_GROUP_DISABLED); return current_mat_nr; } if (export_params_.export_object_groups) { - write_object_group(obj_mesh_data); + write_object_group(fh, obj_mesh_data); } const char *mat_name = matname_fn(current_mat_nr); if (!mat_name) { mat_name = MATERIAL_GROUP_DISABLED; } - file_handler_->write<eOBJSyntaxElement::poly_usemtl>(mat_name); + fh.write<eOBJSyntaxElement::poly_usemtl>(mat_name); return current_mat_nr; } -int16_t OBJWriter::write_vertex_group(const OBJMesh &obj_mesh_data, +int16_t OBJWriter::write_vertex_group(FormatHandler<eFileType::OBJ> &fh, + const OBJMesh &obj_mesh_data, const int poly_index, const int16_t last_poly_vertex_group) const { @@ -251,11 +262,12 @@ int16_t OBJWriter::write_vertex_group(const OBJMesh &obj_mesh_data, return current_group; } if (current_group == NOT_FOUND) { - file_handler_->write<eOBJSyntaxElement::object_group>(DEFORM_GROUP_DISABLED); - return current_group; + fh.write<eOBJSyntaxElement::object_group>(DEFORM_GROUP_DISABLED); + } + else { + fh.write<eOBJSyntaxElement::object_group>( + obj_mesh_data.get_poly_deform_group_name(current_group)); } - file_handler_->write<eOBJSyntaxElement::object_group>( - obj_mesh_data.get_poly_deform_group_name(current_group)); return current_group; } @@ -278,7 +290,9 @@ OBJWriter::func_vert_uv_normal_indices OBJWriter::get_poly_element_writer( return &OBJWriter::write_vert_indices; } -void OBJWriter::write_poly_elements(const OBJMesh &obj_mesh_data, +void OBJWriter::write_poly_elements(FormatHandler<eFileType::OBJ> &fh, + const IndexOffsets &offsets, + const OBJMesh &obj_mesh_data, std::function<const char *(int)> matname_fn) { int last_poly_smooth_group = NEGATIVE_INIT; @@ -294,16 +308,19 @@ void OBJWriter::write_poly_elements(const OBJMesh &obj_mesh_data, Span<int> poly_uv_indices = obj_mesh_data.calc_poly_uv_indices(i); Vector<int> poly_normal_indices = obj_mesh_data.calc_poly_normal_indices(i); - last_poly_smooth_group = write_smooth_group(obj_mesh_data, i, last_poly_smooth_group); - last_poly_vertex_group = write_vertex_group(obj_mesh_data, i, last_poly_vertex_group); - last_poly_mat_nr = write_poly_material(obj_mesh_data, i, last_poly_mat_nr, matname_fn); - (this->*poly_element_writer)(poly_vertex_indices, poly_uv_indices, poly_normal_indices); + last_poly_smooth_group = write_smooth_group(fh, obj_mesh_data, i, last_poly_smooth_group); + last_poly_vertex_group = write_vertex_group(fh, obj_mesh_data, i, last_poly_vertex_group); + last_poly_mat_nr = write_poly_material(fh, obj_mesh_data, i, last_poly_mat_nr, matname_fn); + (this->*poly_element_writer)( + fh, offsets, poly_vertex_indices, poly_uv_indices, poly_normal_indices); } } -void OBJWriter::write_edges_indices(const OBJMesh &obj_mesh_data) const +void OBJWriter::write_edges_indices(FormatHandler<eFileType::OBJ> &fh, + const IndexOffsets &offsets, + const OBJMesh &obj_mesh_data) const { - obj_mesh_data.ensure_mesh_edges(); + /* Note: ensure_mesh_edges should be called before. */ const int tot_edges = obj_mesh_data.tot_edges(); for (int edge_index = 0; edge_index < tot_edges; edge_index++) { const std::optional<std::array<int, 2>> vertex_indices = @@ -311,13 +328,13 @@ void OBJWriter::write_edges_indices(const OBJMesh &obj_mesh_data) const if (!vertex_indices) { continue; } - file_handler_->write<eOBJSyntaxElement::edge>( - (*vertex_indices)[0] + index_offsets_.vertex_offset + 1, - (*vertex_indices)[1] + index_offsets_.vertex_offset + 1); + fh.write<eOBJSyntaxElement::edge>((*vertex_indices)[0] + offsets.vertex_offset + 1, + (*vertex_indices)[1] + offsets.vertex_offset + 1); } } -void OBJWriter::write_nurbs_curve(const OBJCurve &obj_nurbs_data) const +void OBJWriter::write_nurbs_curve(FormatHandler<eFileType::OBJ> &fh, + const OBJCurve &obj_nurbs_data) const { const int total_splines = obj_nurbs_data.total_splines(); for (int spline_idx = 0; spline_idx < total_splines; spline_idx++) { @@ -325,15 +342,15 @@ void OBJWriter::write_nurbs_curve(const OBJCurve &obj_nurbs_data) const for (int vertex_idx = 0; vertex_idx < total_vertices; vertex_idx++) { const float3 vertex_coords = obj_nurbs_data.vertex_coordinates( spline_idx, vertex_idx, export_params_.scaling_factor); - file_handler_->write<eOBJSyntaxElement::vertex_coords>( + fh.write<eOBJSyntaxElement::vertex_coords>( vertex_coords[0], vertex_coords[1], vertex_coords[2]); } const char *nurbs_name = obj_nurbs_data.get_curve_name(); const int nurbs_degree = obj_nurbs_data.get_nurbs_degree(spline_idx); - file_handler_->write<eOBJSyntaxElement::object_group>(nurbs_name); - file_handler_->write<eOBJSyntaxElement::cstype>(); - file_handler_->write<eOBJSyntaxElement::nurbs_degree>(nurbs_degree); + fh.write<eOBJSyntaxElement::object_group>(nurbs_name); + fh.write<eOBJSyntaxElement::cstype>(); + fh.write<eOBJSyntaxElement::nurbs_degree>(nurbs_degree); /** * The numbers written here are indices into the vertex coordinates written * earlier, relative to the line that is going to be written. @@ -342,36 +359,28 @@ void OBJWriter::write_nurbs_curve(const OBJCurve &obj_nurbs_data) const * 0.0 1.0 -1 -2 -3 -4 -1 -2 -3 for a cyclic curve with 4 vertices. */ const int total_control_points = obj_nurbs_data.total_spline_control_points(spline_idx); - file_handler_->write<eOBJSyntaxElement::curve_element_begin>(); + fh.write<eOBJSyntaxElement::curve_element_begin>(); for (int i = 0; i < total_control_points; i++) { /* "+1" to keep indices one-based, even if they're negative: i.e., -1 refers to the * last vertex coordinate, -2 second last. */ - file_handler_->write<eOBJSyntaxElement::vertex_indices>(-((i % total_vertices) + 1)); + fh.write<eOBJSyntaxElement::vertex_indices>(-((i % total_vertices) + 1)); } - file_handler_->write<eOBJSyntaxElement::curve_element_end>(); + fh.write<eOBJSyntaxElement::curve_element_end>(); /** * In `parm u 0 0.1 ..` line:, (total control points + 2) equidistant numbers in the * parameter range are inserted. */ - file_handler_->write<eOBJSyntaxElement::nurbs_parameter_begin>(); + fh.write<eOBJSyntaxElement::nurbs_parameter_begin>(); for (int i = 1; i <= total_control_points + 2; i++) { - file_handler_->write<eOBJSyntaxElement::nurbs_parameters>(1.0f * i / - (total_control_points + 2 + 1)); + fh.write<eOBJSyntaxElement::nurbs_parameters>(1.0f * i / (total_control_points + 2 + 1)); } - file_handler_->write<eOBJSyntaxElement::nurbs_parameter_end>(); + fh.write<eOBJSyntaxElement::nurbs_parameter_end>(); - file_handler_->write<eOBJSyntaxElement::nurbs_group_end>(); + fh.write<eOBJSyntaxElement::nurbs_group_end>(); } } -void OBJWriter::update_index_offsets(const OBJMesh &obj_mesh_data) -{ - index_offsets_.vertex_offset += obj_mesh_data.tot_vertices(); - index_offsets_.uv_vertex_offset += obj_mesh_data.tot_uv_vertices(); - index_offsets_.normal_offset += obj_mesh_data.tot_normal_indices(); -} - /* -------------------------------------------------------------------- */ /** \name .MTL writers. * \{ */ @@ -394,18 +403,31 @@ MTLWriter::MTLWriter(const char *obj_filepath) noexcept(false) if (!ok) { throw std::system_error(ENAMETOOLONG, std::system_category(), ""); } - file_handler_ = std::make_unique<FormattedFileHandler<eFileType::MTL>>(mtl_filepath_); + outfile_ = BLI_fopen(mtl_filepath_.c_str(), "wb"); + if (!outfile_) { + throw std::system_error(errno, std::system_category(), "Cannot open file " + mtl_filepath_); + } +} +MTLWriter::~MTLWriter() +{ + if (outfile_) { + fmt_handler_.write_to_file(outfile_); + if (std::fclose(outfile_)) { + std::cerr << "Error: could not close the file '" << mtl_filepath_ + << "' properly, it may be corrupted." << std::endl; + } + } } -void MTLWriter::write_header(const char *blen_filepath) const +void MTLWriter::write_header(const char *blen_filepath) { using namespace std::string_literals; const char *blen_basename = (blen_filepath && blen_filepath[0] != '\0') ? BLI_path_basename(blen_filepath) : "None"; - file_handler_->write<eMTLSyntaxElement::string>("# Blender "s + BKE_blender_version_string() + - " MTL File: '" + blen_basename + "'\n"); - file_handler_->write<eMTLSyntaxElement::string>("# www.blender.org\n"); + fmt_handler_.write<eMTLSyntaxElement::string>("# Blender "s + BKE_blender_version_string() + + " MTL File: '" + blen_basename + "'\n"); + fmt_handler_.write<eMTLSyntaxElement::string>("# www.blender.org\n"); } StringRefNull MTLWriter::mtl_file_path() const @@ -415,18 +437,18 @@ StringRefNull MTLWriter::mtl_file_path() const void MTLWriter::write_bsdf_properties(const MTLMaterial &mtl_material) { - file_handler_->write<eMTLSyntaxElement::Ns>(mtl_material.Ns); - file_handler_->write<eMTLSyntaxElement::Ka>( + fmt_handler_.write<eMTLSyntaxElement::Ns>(mtl_material.Ns); + fmt_handler_.write<eMTLSyntaxElement::Ka>( mtl_material.Ka.x, mtl_material.Ka.y, mtl_material.Ka.z); - file_handler_->write<eMTLSyntaxElement::Kd>( + fmt_handler_.write<eMTLSyntaxElement::Kd>( mtl_material.Kd.x, mtl_material.Kd.y, mtl_material.Kd.z); - file_handler_->write<eMTLSyntaxElement::Ks>( + fmt_handler_.write<eMTLSyntaxElement::Ks>( mtl_material.Ks.x, mtl_material.Ks.y, mtl_material.Ks.z); - file_handler_->write<eMTLSyntaxElement::Ke>( + fmt_handler_.write<eMTLSyntaxElement::Ke>( mtl_material.Ke.x, mtl_material.Ke.y, mtl_material.Ke.z); - file_handler_->write<eMTLSyntaxElement::Ni>(mtl_material.Ni); - file_handler_->write<eMTLSyntaxElement::d>(mtl_material.d); - file_handler_->write<eMTLSyntaxElement::illum>(mtl_material.illum); + fmt_handler_.write<eMTLSyntaxElement::Ni>(mtl_material.Ni); + fmt_handler_.write<eMTLSyntaxElement::d>(mtl_material.d); + fmt_handler_.write<eMTLSyntaxElement::illum>(mtl_material.illum); } void MTLWriter::write_texture_map( @@ -449,8 +471,8 @@ void MTLWriter::write_texture_map( #define SYNTAX_DISPATCH(eMTLSyntaxElement) \ if (texture_map.key == eMTLSyntaxElement) { \ - file_handler_->write<eMTLSyntaxElement>(translation + scale + map_bump_strength, \ - texture_map.value.image_path); \ + fmt_handler_.write<eMTLSyntaxElement>(translation + scale + map_bump_strength, \ + texture_map.value.image_path); \ return; \ } @@ -474,8 +496,8 @@ void MTLWriter::write_materials() mtlmaterials_.end(), [](const MTLMaterial &a, const MTLMaterial &b) { return a.name < b.name; }); for (const MTLMaterial &mtlmat : mtlmaterials_) { - file_handler_->write<eMTLSyntaxElement::string>("\n"); - file_handler_->write<eMTLSyntaxElement::newmtl>(mtlmat.name); + fmt_handler_.write<eMTLSyntaxElement::string>("\n"); + fmt_handler_.write<eMTLSyntaxElement::newmtl>(mtlmat.name); write_bsdf_properties(mtlmat); for (const Map<const eMTLSyntaxElement, tex_map_XX>::Item &texture_map : mtlmat.texture_maps.items()) { diff --git a/source/blender/io/wavefront_obj/exporter/obj_export_file_writer.hh b/source/blender/io/wavefront_obj/exporter/obj_export_file_writer.hh index 7385d9fabe2..2620d65f28c 100644 --- a/source/blender/io/wavefront_obj/exporter/obj_export_file_writer.hh +++ b/source/blender/io/wavefront_obj/exporter/obj_export_file_writer.hh @@ -49,14 +49,29 @@ struct IndexOffsets { class OBJWriter : NonMovable, NonCopyable { private: const OBJExportParams &export_params_; - std::unique_ptr<FormattedFileHandler<eFileType::OBJ>> file_handler_ = nullptr; - IndexOffsets index_offsets_{0, 0, 0}; + std::string outfile_path_; + FILE *outfile_; public: OBJWriter(const char *filepath, const OBJExportParams &export_params) noexcept(false) - : export_params_(export_params) + : export_params_(export_params), outfile_path_(filepath), outfile_(nullptr) { - file_handler_ = std::make_unique<FormattedFileHandler<eFileType::OBJ>>(filepath); + outfile_ = BLI_fopen(filepath, "wb"); + if (!outfile_) { + throw std::system_error(errno, std::system_category(), "Cannot open file " + outfile_path_); + } + } + ~OBJWriter() + { + if (outfile_ && std::fclose(outfile_)) { + std::cerr << "Error: could not close the file '" << outfile_path_ + << "' properly, it may be corrupted." << std::endl; + } + } + + FILE *get_outfile() const + { + return outfile_; } void write_header() const; @@ -64,11 +79,11 @@ class OBJWriter : NonMovable, NonCopyable { /** * Write object's name or group. */ - void write_object_name(const OBJMesh &obj_mesh_data) const; + void write_object_name(FormatHandler<eFileType::OBJ> &fh, const OBJMesh &obj_mesh_data) const; /** * Write an object's group with mesh and/or material name appended conditionally. */ - void write_object_group(const OBJMesh &obj_mesh_data) const; + void write_object_group(FormatHandler<eFileType::OBJ> &fh, const OBJMesh &obj_mesh_data) const; /** * Write file name of Material Library in .OBJ file. */ @@ -76,21 +91,22 @@ class OBJWriter : NonMovable, NonCopyable { /** * Write vertex coordinates for all vertices as "v x y z". */ - void write_vertex_coords(const OBJMesh &obj_mesh_data) const; + void write_vertex_coords(FormatHandler<eFileType::OBJ> &fh, const OBJMesh &obj_mesh_data) const; /** * Write UV vertex coordinates for all vertices as `vt u v`. * \note UV indices are stored here, but written with polygons later. */ - void write_uv_coords(OBJMesh &obj_mesh_data) const; + void write_uv_coords(FormatHandler<eFileType::OBJ> &fh, OBJMesh &obj_mesh_data) const; /** * Write loop normals for smooth-shaded polygons, and polygon normals otherwise, as "vn x y z". * \note Normal indices ares stored here, but written with polygons later. */ - void write_poly_normals(OBJMesh &obj_mesh_data); + void write_poly_normals(FormatHandler<eFileType::OBJ> &fh, OBJMesh &obj_mesh_data); /** * Write smooth group if polygon at the given index is shaded smooth else "s 0" */ - int write_smooth_group(const OBJMesh &obj_mesh_data, + int write_smooth_group(FormatHandler<eFileType::OBJ> &fh, + const OBJMesh &obj_mesh_data, int poly_index, int last_poly_smooth_group) const; /** @@ -98,14 +114,16 @@ class OBJWriter : NonMovable, NonCopyable { * \return #mat_nr of the polygon at the given index. * \note It doesn't write to the material library. */ - int16_t write_poly_material(const OBJMesh &obj_mesh_data, + int16_t write_poly_material(FormatHandler<eFileType::OBJ> &fh, + const OBJMesh &obj_mesh_data, int poly_index, int16_t last_poly_mat_nr, std::function<const char *(int)> matname_fn) const; /** * Write the name of the deform group of a polygon. */ - int16_t write_vertex_group(const OBJMesh &obj_mesh_data, + int16_t write_vertex_group(FormatHandler<eFileType::OBJ> &fh, + const OBJMesh &obj_mesh_data, int poly_index, int16_t last_poly_vertex_group) const; /** @@ -115,25 +133,25 @@ class OBJWriter : NonMovable, NonCopyable { * name used in the .obj file. * \note UV indices were stored while writing UV vertices. */ - void write_poly_elements(const OBJMesh &obj_mesh_data, + void write_poly_elements(FormatHandler<eFileType::OBJ> &fh, + const IndexOffsets &offsets, + const OBJMesh &obj_mesh_data, std::function<const char *(int)> matname_fn); /** * Write loose edges of a mesh as "l v1 v2". */ - void write_edges_indices(const OBJMesh &obj_mesh_data) const; + void write_edges_indices(FormatHandler<eFileType::OBJ> &fh, + const IndexOffsets &offsets, + const OBJMesh &obj_mesh_data) const; /** * Write a NURBS curve to the .OBJ file in parameter form. */ - void write_nurbs_curve(const OBJCurve &obj_nurbs_data) const; - - /** - * When there are multiple objects in a frame, the indices of previous objects' coordinates or - * normals add up. - */ - void update_index_offsets(const OBJMesh &obj_mesh_data); + void write_nurbs_curve(FormatHandler<eFileType::OBJ> &fh, const OBJCurve &obj_nurbs_data) const; private: - using func_vert_uv_normal_indices = void (OBJWriter::*)(Span<int> vert_indices, + using func_vert_uv_normal_indices = void (OBJWriter::*)(FormatHandler<eFileType::OBJ> &fh, + const IndexOffsets &offsets, + Span<int> vert_indices, Span<int> uv_indices, Span<int> normal_indices) const; /** @@ -144,25 +162,33 @@ class OBJWriter : NonMovable, NonCopyable { /** * Write one line of polygon indices as "f v1/vt1/vn1 v2/vt2/vn2 ...". */ - void write_vert_uv_normal_indices(Span<int> vert_indices, + void write_vert_uv_normal_indices(FormatHandler<eFileType::OBJ> &fh, + const IndexOffsets &offsets, + Span<int> vert_indices, Span<int> uv_indices, Span<int> normal_indices) const; /** * Write one line of polygon indices as "f v1//vn1 v2//vn2 ...". */ - void write_vert_normal_indices(Span<int> vert_indices, + void write_vert_normal_indices(FormatHandler<eFileType::OBJ> &fh, + const IndexOffsets &offsets, + Span<int> vert_indices, Span<int> /*uv_indices*/, Span<int> normal_indices) const; /** * Write one line of polygon indices as "f v1/vt1 v2/vt2 ...". */ - void write_vert_uv_indices(Span<int> vert_indices, + void write_vert_uv_indices(FormatHandler<eFileType::OBJ> &fh, + const IndexOffsets &offsets, + Span<int> vert_indices, Span<int> uv_indices, Span<int> /*normal_indices*/) const; /** * Write one line of polygon indices as "f v1 v2 ...". */ - void write_vert_indices(Span<int> vert_indices, + void write_vert_indices(FormatHandler<eFileType::OBJ> &fh, + const IndexOffsets &offsets, + Span<int> vert_indices, Span<int> /*uv_indices*/, Span<int> /*normal_indices*/) const; }; @@ -172,7 +198,8 @@ class OBJWriter : NonMovable, NonCopyable { */ class MTLWriter : NonMovable, NonCopyable { private: - std::unique_ptr<FormattedFileHandler<eFileType::MTL>> file_handler_ = nullptr; + FormatHandler<eFileType::MTL> fmt_handler_; + FILE *outfile_; std::string mtl_filepath_; Vector<MTLMaterial> mtlmaterials_; /* Map from a Material* to an index into mtlmaterials_. */ @@ -183,8 +210,9 @@ class MTLWriter : NonMovable, NonCopyable { * Create the .MTL file. */ MTLWriter(const char *obj_filepath) noexcept(false); + ~MTLWriter(); - void write_header(const char *blen_filepath) const; + void write_header(const char *blen_filepath); /** * Write all of the material specifications to the MTL file. * For consistency of output from run to run (useful for testing), diff --git a/source/blender/io/wavefront_obj/exporter/obj_export_io.hh b/source/blender/io/wavefront_obj/exporter/obj_export_io.hh index 1bbefaee75f..f1a8178bf0a 100644 --- a/source/blender/io/wavefront_obj/exporter/obj_export_io.hh +++ b/source/blender/io/wavefront_obj/exporter/obj_export_io.hh @@ -24,6 +24,7 @@ #include <string> #include <system_error> #include <type_traits> +#include <vector> #include "BLI_compiler_attrs.h" #include "BLI_fileops.h" @@ -124,6 +125,14 @@ constexpr bool is_type_integral = (... && std::is_integral_v<std::decay_t<T>>); template<typename... T> constexpr bool is_type_string_related = (... && std::is_constructible_v<std::string, T>); +// gcc (at least 9.3) while compiling the obj_exporter_tests.cc with optimizations on, +// results in "obj_export_io.hh:205:18: warning: ‘%s’ directive output truncated writing 34 bytes +// into a region of size 6" and similar warnings. Yes the output is truncated, and that is covered +// as an edge case by tests on purpose. +#if defined __GNUC__ +# pragma GCC diagnostic push +# pragma GCC diagnostic ignored "-Wformat-truncation" +#endif template<typename... T> constexpr FormattingSyntax syntax_elem_to_formatting(const eOBJSyntaxElement key) { @@ -264,31 +273,44 @@ constexpr FormattingSyntax syntax_elem_to_formatting(const eMTLSyntaxElement key } } } +#if defined __GNUC__ +# pragma GCC diagnostic pop +#endif /** - * File format and syntax agnostic file writer. + * File format and syntax agnostic file buffer writer. + * All writes are done into an internal chunked memory buffer + * (list of default 64 kilobyte blocks). + * Call write_fo_file once in a while to write the memory buffer(s) + * into the given file. */ -template<eFileType filetype> class FormattedFileHandler : NonCopyable, NonMovable { +template<eFileType filetype, + size_t buffer_chunk_size = 64 * 1024, + size_t write_local_buffer_size = 1024> +class FormatHandler : NonCopyable, NonMovable { private: - std::FILE *outfile_ = nullptr; - std::string outfile_path_; + typedef std::vector<char> VectorChar; + std::vector<VectorChar> blocks_; public: - FormattedFileHandler(std::string outfile_path) noexcept(false) - : outfile_path_(std::move(outfile_path)) + /* Write contents to the buffer(s) into a file, and clear the buffers. */ + void write_to_file(FILE *f) { - outfile_ = BLI_fopen(outfile_path_.c_str(), "w"); - if (!outfile_) { - throw std::system_error(errno, std::system_category(), "Cannot open file " + outfile_path_); - } + for (const auto &b : blocks_) + fwrite(b.data(), 1, b.size(), f); + blocks_.clear(); } - ~FormattedFileHandler() + std::string get_as_string() const { - if (outfile_ && std::fclose(outfile_)) { - std::cerr << "Error: could not close the file '" << outfile_path_ - << "' properly, it may be corrupted." << std::endl; - } + std::string s; + for (const auto &b : blocks_) + s.append(b.data(), b.size()); + return s; + } + size_t get_block_count() const + { + return blocks_.size(); } /** @@ -298,7 +320,7 @@ template<eFileType filetype> class FormattedFileHandler : NonCopyable, NonMovabl * `eFileType::MTL`. */ template<typename FileTypeTraits<filetype>::SyntaxType key, typename... T> - constexpr void write(T &&...args) const + constexpr void write(T &&...args) { /* Get format syntax, number of arguments expected and whether types of given arguments are * valid. @@ -339,13 +361,47 @@ template<eFileType filetype> class FormattedFileHandler : NonCopyable, NonMovabl } } - template<typename... T> constexpr void write_impl(const char *fmt, T &&...args) const + /* Ensure the last block contains at least this amount of free space. + * If not, add a new block with max of block size & the amount of space needed. */ + void ensure_space(size_t at_least) + { + if (blocks_.empty() || (blocks_.back().capacity() - blocks_.back().size() < at_least)) { + VectorChar &b = blocks_.emplace_back(VectorChar()); + b.reserve(std::max(at_least, buffer_chunk_size)); + } + } + + template<typename... T> constexpr void write_impl(const char *fmt, T &&...args) { if constexpr (sizeof...(T) == 0) { - std::fputs(fmt, outfile_); + /* No arguments: just emit the format string. */ + size_t len = strlen(fmt); + ensure_space(len); + VectorChar &bb = blocks_.back(); + bb.insert(bb.end(), fmt, fmt + len); } else { - std::fprintf(outfile_, fmt, convert_to_primitive(std::forward<T>(args))...); + /* Format into a local buffer. */ + char buf[write_local_buffer_size]; + int needed = std::snprintf( + buf, write_local_buffer_size, fmt, convert_to_primitive(std::forward<T>(args))...); + if (needed < 0) + throw std::system_error( + errno, std::system_category(), "Failed to format obj export string into a buffer"); + ensure_space(needed + 1); /* Ensure space for zero terminator. */ + VectorChar &bb = blocks_.back(); + if (needed < write_local_buffer_size) { + /* String formatted successfully into the local buffer, copy it. */ + bb.insert(bb.end(), buf, buf + needed); + } + else { + /* Would need more space than the local buffer: insert said space and format again into + * that. */ + size_t bbEnd = bb.size(); + bb.insert(bb.end(), needed, ' '); + std::snprintf( + bb.data() + bbEnd, needed + 1, fmt, convert_to_primitive(std::forward<T>(args))...); + } } } }; diff --git a/source/blender/io/wavefront_obj/exporter/obj_export_mesh.cc b/source/blender/io/wavefront_obj/exporter/obj_export_mesh.cc index c1b12ddd217..468631cdd82 100644 --- a/source/blender/io/wavefront_obj/exporter/obj_export_mesh.cc +++ b/source/blender/io/wavefront_obj/exporter/obj_export_mesh.cc @@ -69,16 +69,28 @@ OBJMesh::OBJMesh(Depsgraph *depsgraph, const OBJExportParams &export_params, Obj */ OBJMesh::~OBJMesh() { - free_mesh_if_needed(); - if (poly_smooth_groups_) { - MEM_freeN(poly_smooth_groups_); - } + clear(); } void OBJMesh::free_mesh_if_needed() { if (mesh_eval_needs_free_ && export_mesh_eval_) { BKE_id_free(nullptr, export_mesh_eval_); + export_mesh_eval_ = nullptr; + mesh_eval_needs_free_ = false; + } +} + +void OBJMesh::clear() +{ + free_mesh_if_needed(); + uv_indices_.clear_and_make_inline(); + uv_coords_.clear_and_make_inline(); + loop_to_normal_index_.clear_and_make_inline(); + normal_coords_.clear_and_make_inline(); + if (poly_smooth_groups_) { + MEM_freeN(poly_smooth_groups_); + poly_smooth_groups_ = nullptr; } } @@ -256,7 +268,7 @@ Vector<int> OBJMesh::calc_poly_vertex_indices(const int poly_index) const return r_poly_vertex_indices; } -void OBJMesh::store_uv_coords_and_indices(Vector<std::array<float, 2>> &r_uv_coords) +void OBJMesh::store_uv_coords_and_indices() { const MPoly *mpoly = export_mesh_eval_->mpoly; const MLoop *mloop = export_mesh_eval_->mloop; @@ -276,7 +288,7 @@ void OBJMesh::store_uv_coords_and_indices(Vector<std::array<float, 2>> &r_uv_coo uv_indices_.resize(totpoly); /* At least total vertices of a mesh will be present in its texture map. So * reserve minimum space early. */ - r_uv_coords.reserve(totvert); + uv_coords_.reserve(totvert); tot_uv_vertices_ = 0; for (int vertex_index = 0; vertex_index < totvert; vertex_index++) { @@ -288,11 +300,10 @@ void OBJMesh::store_uv_coords_and_indices(Vector<std::array<float, 2>> &r_uv_coo const int vertices_in_poly = mpoly[uv_vert->poly_index].totloop; /* Store UV vertex coordinates. */ - r_uv_coords.resize(tot_uv_vertices_); + uv_coords_.resize(tot_uv_vertices_); const int loopstart = mpoly[uv_vert->poly_index].loopstart; Span<float> vert_uv_coords(mloopuv[loopstart + uv_vert->loop_of_poly_index].uv, 2); - r_uv_coords[tot_uv_vertices_ - 1][0] = vert_uv_coords[0]; - r_uv_coords[tot_uv_vertices_ - 1][1] = vert_uv_coords[1]; + uv_coords_[tot_uv_vertices_ - 1] = float2(vert_uv_coords[0], vert_uv_coords[1]); /* Store UV vertex indices. */ uv_indices_[uv_vert->poly_index].resize(vertices_in_poly); @@ -340,7 +351,7 @@ static float3 round_float3_to_n_digits(const float3 &v, int round_digits) return ans; } -void OBJMesh::store_normal_coords_and_indices(Vector<float3> &r_normal_coords) +void OBJMesh::store_normal_coords_and_indices() { /* We'll round normal components to 4 digits. * This will cover up some minor differences @@ -358,7 +369,7 @@ void OBJMesh::store_normal_coords_and_indices(Vector<float3> &r_normal_coords) *lnors)[3] = (const float(*)[3])(CustomData_get_layer(&export_mesh_eval_->ldata, CD_NORMAL)); for (int poly_index = 0; poly_index < export_mesh_eval_->totpoly; ++poly_index) { const MPoly &mpoly = export_mesh_eval_->mpoly[poly_index]; - bool need_per_loop_normals = is_ith_poly_smooth(poly_index); + bool need_per_loop_normals = lnors != nullptr || (mpoly.flag & ME_SMOOTH); if (need_per_loop_normals) { for (int loop_of_poly = 0; loop_of_poly < mpoly.totloop; ++loop_of_poly) { float3 loop_normal; @@ -371,7 +382,7 @@ void OBJMesh::store_normal_coords_and_indices(Vector<float3> &r_normal_coords) if (loop_norm_index == -1) { loop_norm_index = cur_normal_index++; normal_to_index.add(rounded_loop_normal, loop_norm_index); - r_normal_coords.append(rounded_loop_normal); + normal_coords_.append(rounded_loop_normal); } loop_to_normal_index_[loop_index] = loop_norm_index; } @@ -383,7 +394,7 @@ void OBJMesh::store_normal_coords_and_indices(Vector<float3> &r_normal_coords) if (poly_norm_index == -1) { poly_norm_index = cur_normal_index++; normal_to_index.add(rounded_poly_normal, poly_norm_index); - r_normal_coords.append(rounded_poly_normal); + normal_coords_.append(rounded_poly_normal); } for (int i = 0; i < mpoly.totloop; ++i) { int loop_index = mpoly.loopstart + i; diff --git a/source/blender/io/wavefront_obj/exporter/obj_export_mesh.hh b/source/blender/io/wavefront_obj/exporter/obj_export_mesh.hh index f3ace140006..4cfbffdcebc 100644 --- a/source/blender/io/wavefront_obj/exporter/obj_export_mesh.hh +++ b/source/blender/io/wavefront_obj/exporter/obj_export_mesh.hh @@ -82,11 +82,19 @@ class OBJMesh : NonCopyable { * Per-polygon-per-vertex UV vertex indices. */ Vector<Vector<int>> uv_indices_; + /* + * UV vertices. + */ + Vector<float2> uv_coords_; /** * Per-loop normal index. */ Vector<int> loop_to_normal_index_; /* + * Normal coords. + */ + Vector<float3> normal_coords_; + /* * Total number of normal indices (maximum entry, plus 1, in * the loop_to_norm_index_ vector). */ @@ -108,6 +116,9 @@ class OBJMesh : NonCopyable { OBJMesh(Depsgraph *depsgraph, const OBJExportParams &export_params, Object *mesh_object); ~OBJMesh(); + /* Clear various arrays to release potentially large memory allocations. */ + void clear(); + int tot_vertices() const; int tot_polygons() const; int tot_uv_vertices() const; @@ -165,10 +176,14 @@ class OBJMesh : NonCopyable { Vector<int> calc_poly_vertex_indices(int poly_index) const; /** * Calculate UV vertex coordinates of an Object. - * - * \note Also store the UV vertex indices in the member variable. + * Stores the coordinates and UV vertex indices in the member variables. */ - void store_uv_coords_and_indices(Vector<std::array<float, 2>> &r_uv_coords); + void store_uv_coords_and_indices(); + /* Get UV coordinates computed by store_uv_coords_and_indices. */ + const Vector<float2> &get_uv_coords() const + { + return uv_coords_; + } Span<int> calc_poly_uv_indices(int poly_index) const; /** * Calculate polygon normal of a polygon at given index. @@ -177,10 +192,15 @@ class OBJMesh : NonCopyable { */ float3 calc_poly_normal(int poly_index) const; /** - * Find the unique normals of the mesh and return them in \a r_normal_coords. - * Store the indices into that vector with for each loop in this #OBJMesh. + * Find the unique normals of the mesh and stores them in a member variable. + * Also stores the indices into that vector with for each loop. */ - void store_normal_coords_and_indices(Vector<float3> &r_normal_coords); + void store_normal_coords_and_indices(); + /* Get normals calculate by store_normal_coords_and_indices. */ + const Vector<float3> &get_normal_coords() const + { + return normal_coords_; + } /** * Calculate a polygon's polygon/loop normal indices. * \param poly_index Index of the polygon to calculate indices for. diff --git a/source/blender/io/wavefront_obj/exporter/obj_exporter.cc b/source/blender/io/wavefront_obj/exporter/obj_exporter.cc index 0c753ccdcac..187f50277f1 100644 --- a/source/blender/io/wavefront_obj/exporter/obj_exporter.cc +++ b/source/blender/io/wavefront_obj/exporter/obj_exporter.cc @@ -25,6 +25,7 @@ #include "BKE_scene.h" #include "BLI_path_util.h" +#include "BLI_task.hh" #include "BLI_vector.hh" #include "DEG_depsgraph_query.h" @@ -155,44 +156,97 @@ static void write_mesh_objects(Vector<std::unique_ptr<OBJMesh>> exportable_as_me MTLWriter *mtl_writer, const OBJExportParams &export_params) { + /* Parallelization is over meshes/objects, which means + * we have to have the output text buffer for each object, + * and write them all into the file at the end. */ + size_t count = exportable_as_mesh.size(); + std::vector<FormatHandler<eFileType::OBJ>> buffers(count); + + /* Serial: gather material indices, ensure normals & edges. */ + Vector<Vector<int>> mtlindices; if (mtl_writer) { obj_writer.write_mtllib_name(mtl_writer->mtl_file_path()); + mtlindices.reserve(count); } - - /* Smooth groups and UV vertex indices may make huge memory allocations, so they should be freed - * right after they're written, instead of waiting for #blender::Vector to clean them up after - * all the objects are exported. */ for (auto &obj_mesh : exportable_as_mesh) { - obj_writer.write_object_name(*obj_mesh); - obj_writer.write_vertex_coords(*obj_mesh); - Vector<int> obj_mtlindices; + OBJMesh &obj = *obj_mesh; + if (mtl_writer) { + mtlindices.append(mtl_writer->add_materials(obj)); + } + if (export_params.export_normals) { + obj.ensure_mesh_normals(); + } + obj.ensure_mesh_edges(); + } - if (obj_mesh->tot_polygons() > 0) { - if (export_params.export_smooth_groups) { - obj_mesh->calc_smooth_groups(export_params.smooth_groups_bitflags); - } + /* Parallel over meshes: store normal coords & indices, uv coords and indices. */ + blender::threading::parallel_for(IndexRange(count), 1, [&](IndexRange range) { + for (const int i : range) { + OBJMesh &obj = *exportable_as_mesh[i]; if (export_params.export_normals) { - obj_writer.write_poly_normals(*obj_mesh); + obj.store_normal_coords_and_indices(); } if (export_params.export_uv) { - obj_writer.write_uv_coords(*obj_mesh); - } - if (mtl_writer) { - obj_mtlindices = mtl_writer->add_materials(*obj_mesh); + obj.store_uv_coords_and_indices(); } - /* This function takes a 0-indexed slot index for the obj_mesh object and - * returns the material name that we are using in the .obj file for it. */ - std::function<const char *(int)> matname_fn = [&](int s) -> const char * { - if (!mtl_writer || s < 0 || s >= obj_mtlindices.size()) { - return nullptr; + } + }); + + /* Serial: calculate index offsets; these are sequentially added + * over all meshes, and requite normal/uv indices to be calculated. */ + Vector<IndexOffsets> index_offsets; + index_offsets.reserve(count); + IndexOffsets offsets{0, 0, 0}; + for (auto &obj_mesh : exportable_as_mesh) { + OBJMesh &obj = *obj_mesh; + index_offsets.append(offsets); + offsets.vertex_offset += obj.tot_vertices(); + offsets.uv_vertex_offset += obj.tot_uv_vertices(); + offsets.normal_offset += obj.tot_normal_indices(); + } + + /* Parallel over meshes: main result writing. */ + blender::threading::parallel_for(IndexRange(count), 1, [&](IndexRange range) { + for (const int i : range) { + OBJMesh &obj = *exportable_as_mesh[i]; + auto &fh = buffers[i]; + + obj_writer.write_object_name(fh, obj); + obj_writer.write_vertex_coords(fh, obj); + + if (obj.tot_polygons() > 0) { + if (export_params.export_smooth_groups) { + obj.calc_smooth_groups(export_params.smooth_groups_bitflags); + } + if (export_params.export_normals) { + obj_writer.write_poly_normals(fh, obj); } - return mtl_writer->mtlmaterial_name(obj_mtlindices[s]); - }; - obj_writer.write_poly_elements(*obj_mesh, matname_fn); + if (export_params.export_uv) { + obj_writer.write_uv_coords(fh, obj); + } + /* This function takes a 0-indexed slot index for the obj_mesh object and + * returns the material name that we are using in the .obj file for it. */ + const auto *obj_mtlindices = mtlindices.is_empty() ? nullptr : &mtlindices[i]; + std::function<const char *(int)> matname_fn = [&](int s) -> const char * { + if (!obj_mtlindices || s < 0 || s >= obj_mtlindices->size()) { + return nullptr; + } + return mtl_writer->mtlmaterial_name((*obj_mtlindices)[s]); + }; + obj_writer.write_poly_elements(fh, index_offsets[i], obj, matname_fn); + } + obj_writer.write_edges_indices(fh, index_offsets[i], obj); + + /* Nothing will need this object's data after this point, release + * various arrays here. */ + obj.clear(); } - obj_writer.write_edges_indices(*obj_mesh); + }); - obj_writer.update_index_offsets(*obj_mesh); + /* Write all the object text buffers into the output file. */ + FILE *f = obj_writer.get_outfile(); + for (auto &b : buffers) { + b.write_to_file(f); } } @@ -202,11 +256,13 @@ static void write_mesh_objects(Vector<std::unique_ptr<OBJMesh>> exportable_as_me static void write_nurbs_curve_objects(const Vector<std::unique_ptr<OBJCurve>> &exportable_as_nurbs, const OBJWriter &obj_writer) { + FormatHandler<eFileType::OBJ> fh; /* #OBJCurve doesn't have any dynamically allocated memory, so it's fine * to wait for #blender::Vector to clean the objects up. */ for (const std::unique_ptr<OBJCurve> &obj_curve : exportable_as_nurbs) { - obj_writer.write_nurbs_curve(*obj_curve); + obj_writer.write_nurbs_curve(fh, *obj_curve); } + fh.write_to_file(obj_writer.get_outfile()); } void export_frame(Depsgraph *depsgraph, const OBJExportParams &export_params, const char *filepath) |