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GeezerVison is showing github.com — tinyobjloader/tiny_obj_loader.h at master · randy408/tinyobjloader Expand file tree/ Copy pathtiny_obj_loader.hMore file actions 2927 lines (2484 loc) · 86.6 KB / Copy pathtiny_obj_loader.hFile metadata and controls2927 lines (2484 loc) · 86.6 KB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 /* The MIT License (MIT) Copyright (c) 2012-2018 Syoyo Fujita and many contributors. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ // // version 2.0.0 : Add new object oriented API. 1.x API is still provided. // * Support line primitive. // * Support points primitive. // version 1.4.0 : Modifed ParseTextureNameAndOption API // version 1.3.1 : Make ParseTextureNameAndOption API public // version 1.3.0 : Separate warning and error message(breaking API of LoadObj) // version 1.2.3 : Added color space extension('-colorspace') to tex opts. // version 1.2.2 : Parse multiple group names. // version 1.2.1 : Added initial support for line('l') primitive(PR #178) // version 1.2.0 : Hardened implementation(#175) // version 1.1.1 : Support smoothing groups(#162) // version 1.1.0 : Support parsing vertex color(#144) // version 1.0.8 : Fix parsing `g` tag just after `usemtl`(#138) // version 1.0.7 : Support multiple tex options(#126) // version 1.0.6 : Add TINYOBJLOADER_USE_DOUBLE option(#124) // version 1.0.5 : Ignore `Tr` when `d` exists in MTL(#43) // version 1.0.4 : Support multiple filenames for 'mtllib'(#112) // version 1.0.3 : Support parsing texture options(#85) // version 1.0.2 : Improve parsing speed by about a factor of 2 for large // files(#105) // version 1.0.1 : Fixes a shape is lost if obj ends with a 'usemtl'(#104) // version 1.0.0 : Change data structure. Change license from BSD to MIT. // // // Use this in *one* .cc // #define TINYOBJLOADER_IMPLEMENTATION // #include "tiny_obj_loader.h" // #ifndef TINY_OBJ_LOADER_H_ #define TINY_OBJ_LOADER_H_ #include <map> #include <string> #include <vector> namespace tinyobj { #ifdef __clang__ #pragma clang diagnostic push #if __has_warning("-Wzero-as-null-pointer-constant") #pragma clang diagnostic ignored "-Wzero-as-null-pointer-constant" #endif #pragma clang diagnostic ignored "-Wpadded" #endif // https://en.wikipedia.org/wiki/Wavefront_.obj_file says ... // // -blendu on | off # set horizontal texture blending // (default on) // -blendv on | off # set vertical texture blending // (default on) // -boost real_value # boost mip-map sharpness // -mm base_value gain_value # modify texture map values (default // 0 1) // # base_value = brightness, // gain_value = contrast // -o u [v [w]] # Origin offset (default // 0 0 0) // -s u [v [w]] # Scale (default // 1 1 1) // -t u [v [w]] # Turbulence (default // 0 0 0) // -texres resolution # texture resolution to create // -clamp on | off # only render texels in the clamped // 0-1 range (default off) // # When unclamped, textures are // repeated across a surface, // # when clamped, only texels which // fall within the 0-1 // # range are rendered. // -bm mult_value # bump multiplier (for bump maps // only) // // -imfchan r | g | b | m | l | z # specifies which channel of the file // is used to // # create a scalar or bump texture. // r:red, g:green, // # b:blue, m:matte, l:luminance, // z:z-depth.. // # (the default for bump is 'l' and // for decal is 'm') // bump -imfchan r bumpmap.tga # says to use the red channel of // bumpmap.tga as the bumpmap // // For reflection maps... // // -type sphere # specifies a sphere for a "refl" // reflection map // -type cube_top | cube_bottom | # when using a cube map, the texture // file for each // cube_front | cube_back | # side of the cube is specified // separately // cube_left | cube_right // // TinyObjLoader extension. // // -colorspace SPACE # Color space of the texture. e.g. // 'sRGB` or 'linear' // #ifdef TINYOBJLOADER_USE_DOUBLE //#pragma message "using double" typedef double real_t; #else //#pragma message "using float" typedef float real_t; #endif typedef enum { TEXTURE_TYPE_NONE, // default TEXTURE_TYPE_SPHERE, TEXTURE_TYPE_CUBE_TOP, TEXTURE_TYPE_CUBE_BOTTOM, TEXTURE_TYPE_CUBE_FRONT, TEXTURE_TYPE_CUBE_BACK, TEXTURE_TYPE_CUBE_LEFT, TEXTURE_TYPE_CUBE_RIGHT } texture_type_t; typedef struct { texture_type_t type; // -type (default TEXTURE_TYPE_NONE) real_t sharpness; // -boost (default 1.0?) real_t brightness; // base_value in -mm option (default 0) real_t contrast; // gain_value in -mm option (default 1) real_t origin_offset[3]; // -o u [v [w]] (default 0 0 0) real_t scale[3]; // -s u [v [w]] (default 1 1 1) real_t turbulence[3]; // -t u [v [w]] (default 0 0 0) // int texture_resolution; // -texres resolution (default = ?) TODO bool clamp; // -clamp (default false) char imfchan; // -imfchan (the default for bump is 'l' and for decal is 'm') bool blendu; // -blendu (default on) bool blendv; // -blendv (default on) real_t bump_multiplier; // -bm (for bump maps only, default 1.0) // extension std::string colorspace; // Explicitly specify color space of stored texel // value. Usually `sRGB` or `linear` (default empty). } texture_option_t; typedef struct { std::string name; real_t ambient[3]; real_t diffuse[3]; real_t specular[3]; real_t transmittance[3]; real_t emission[3]; real_t shininess; real_t ior; // index of refraction real_t dissolve; // 1 == opaque; 0 == fully transparent // illumination model (see http://www.fileformat.info/format/material/) int illum; int dummy; // Suppress padding warning. std::string ambient_texname; // map_Ka std::string diffuse_texname; // map_Kd std::string specular_texname; // map_Ks std::string specular_highlight_texname; // map_Ns std::string bump_texname; // map_bump, map_Bump, bump std::string displacement_texname; // disp std::string alpha_texname; // map_d std::string reflection_texname; // refl texture_option_t ambient_texopt; texture_option_t diffuse_texopt; texture_option_t specular_texopt; texture_option_t specular_highlight_texopt; texture_option_t bump_texopt; texture_option_t displacement_texopt; texture_option_t alpha_texopt; texture_option_t reflection_texopt; // PBR extension // http://exocortex.com/blog/extending_wavefront_mtl_to_support_pbr real_t roughness; // [0, 1] default 0 real_t metallic; // [0, 1] default 0 real_t sheen; // [0, 1] default 0 real_t clearcoat_thickness; // [0, 1] default 0 real_t clearcoat_roughness; // [0, 1] default 0 real_t anisotropy; // aniso. [0, 1] default 0 real_t anisotropy_rotation; // anisor. [0, 1] default 0 real_t pad0; std::string roughness_texname; // map_Pr std::string metallic_texname; // map_Pm std::string sheen_texname; // map_Ps std::string emissive_texname; // map_Ke std::string normal_texname; // norm. For normal mapping. texture_option_t roughness_texopt; texture_option_t metallic_texopt; texture_option_t sheen_texopt; texture_option_t emissive_texopt; texture_option_t normal_texopt; int pad2; std::map<std::string, std::string> unknown_parameter; #ifdef TINY_OBJ_LOADER_PYTHON_BINDING // For pybind11 std::array<double, 3> GetDiffuse() { std::array<double, 3> values; values[0] = double(diffuse[0]); values[1] = double(diffuse[1]); values[2] = double(diffuse[2]); return values; } std::array<double, 3> GetSpecular() { std::array<double, 3> values; values[0] = double(specular[0]); values[1] = double(specular[1]); values[2] = double(specular[2]); return values; } std::array<double, 3> GetTransmittance() { std::array<double, 3> values; values[0] = double(transmittance[0]); values[1] = double(transmittance[1]); values[2] = double(transmittance[2]); return values; } std::array<double, 3> GetEmission() { std::array<double, 3> values; values[0] = double(emission[0]); values[1] = double(emission[1]); values[2] = double(emission[2]); return values; } std::array<double, 3> GetAmbient() { std::array<double, 3> values; values[0] = double(ambient[0]); values[1] = double(ambient[1]); values[2] = double(ambient[2]); return values; } void SetDiffuse(std::array<double, 3> &a) { diffuse[0] = real_t(a[0]); diffuse[1] = real_t(a[1]); diffuse[2] = real_t(a[2]); } void SetAmbient(std::array<double, 3> &a) { ambient[0] = real_t(a[0]); ambient[1] = real_t(a[1]); ambient[2] = real_t(a[2]); } void SetSpecular(std::array<double, 3> &a) { specular[0] = real_t(a[0]); specular[1] = real_t(a[1]); specular[2] = real_t(a[2]); } void SetTransmittance(std::array<double, 3> &a) { transmittance[0] = real_t(a[0]); transmittance[1] = real_t(a[1]); transmittance[2] = real_t(a[2]); } std::string GetCustomParameter(const std::string &key) { std::map<std::string, std::string>::const_iterator it = unknown_parameter.find(key); if (it != unknown_parameter.end()) { return it->second; } return std::string(); } #endif } material_t; typedef struct { std::string name; std::vector<int> intValues; std::vector<real_t> floatValues; std::vector<std::string> stringValues; } tag_t; // Index struct to support different indices for vtx/normal/texcoord. // -1 means not used. typedef struct { int vertex_index; int normal_index; int texcoord_index; } index_t; typedef struct { std::vector<index_t> indices; std::vector<unsigned char> num_face_vertices; // The number of vertices per // face. 3 = triangle, 4 = quad, // ... Up to 255 vertices per face. std::vector<int> material_ids; // per-face material ID std::vector<unsigned int> smoothing_group_ids; // per-face smoothing group // ID(0 = off. positive value // = group id) std::vector<tag_t> tags; // SubD tag } mesh_t; // typedef struct { // std::vector<int> indices; // pairs of indices for lines //} path_t; typedef struct { // Linear flattened indices. std::vector<index_t> indices; // indices for vertices(poly lines) std::vector<int> num_line_vertices; // The number of vertices per line. } lines_t; typedef struct { std::vector<index_t> indices; // indices for points } points_t; typedef struct { std::string name; mesh_t mesh; lines_t lines; points_t points; } shape_t; // Vertex attributes struct attrib_t { std::vector<real_t> vertices; // 'v'(xyz) // For backward compatibility, we store vertex weight in separate array. std::vector<real_t> vertex_weights; // 'v'(w) std::vector<real_t> normals; // 'vn' std::vector<real_t> texcoords; // 'vt'(uv) // For backward compatibility, we store texture coordinate 'w' in separate // array. std::vector<real_t> texcoord_ws; // 'vt'(w) std::vector<real_t> colors; // extension: vertex colors attrib_t() {} // // For pybind11 // const std::vector<real_t> &GetVertices() const { return vertices; } const std::vector<real_t> &GetVertexWeights() const { return vertex_weights; } }; typedef struct callback_t_ { // W is optional and set to 1 if there is no `w` item in `v` line void (*vertex_cb)(void *user_data, real_t x, real_t y, real_t z, real_t w); void (*normal_cb)(void *user_data, real_t x, real_t y, real_t z); // y and z are optional and set to 0 if there is no `y` and/or `z` item(s) in // `vt` line. void (*texcoord_cb)(void *user_data, real_t x, real_t y, real_t z); // called per 'f' line. num_indices is the number of face indices(e.g. 3 for // triangle, 4 for quad) // 0 will be passed for undefined index in index_t members. void (*index_cb)(void *user_data, index_t *indices, int num_indices); // `name` material name, `material_id` = the array index of material_t[]. -1 // if // a material not found in .mtl void (*usemtl_cb)(void *user_data, const char *name, int material_id); // `materials` = parsed material data. void (*mtllib_cb)(void *user_data, const material_t *materials, int num_materials); // There may be multiple group names void (*group_cb)(void *user_data, const char **names, int num_names); void (*object_cb)(void *user_data, const char *name); callback_t_() : vertex_cb(NULL), normal_cb(NULL), texcoord_cb(NULL), index_cb(NULL), usemtl_cb(NULL), mtllib_cb(NULL), group_cb(NULL), object_cb(NULL) {} } callback_t; class MaterialReader { public: MaterialReader() {} virtual ~MaterialReader(); virtual bool operator()(const std::string &matId, std::vector<material_t> *materials, std::map<std::string, int> *matMap, std::string *warn, std::string *err) = 0; }; /// /// Read .mtl from a file. /// class MaterialFileReader : public MaterialReader { public: explicit MaterialFileReader(const std::string &mtl_basedir) : m_mtlBaseDir(mtl_basedir) {} virtual ~MaterialFileReader() {} virtual bool operator()(const std::string &matId, std::vector<material_t> *materials, std::map<std::string, int> *matMap, std::string *warn, std::string *err); private: std::string m_mtlBaseDir; }; /// /// Read .mtl from a stream. /// class MaterialStreamReader : public MaterialReader { public: explicit MaterialStreamReader(std::istream &inStream) : m_inStream(inStream) {} virtual ~MaterialStreamReader() {} virtual bool operator()(const std::string &matId, std::vector<material_t> *materials, std::map<std::string, int> *matMap, std::string *warn, std::string *err); private: std::istream &m_inStream; }; // v2 API struct ObjReaderConfig { bool triangulate; // triangulate polygon? /// Parse vertex color. /// If vertex color is not present, its filled with default value. /// false = no vertex color /// This will increase memory of parsed .obj bool vertex_color; /// /// Search path to .mtl file. /// Default = "" = search from the same directory of .obj file. /// Valid only when loading .obj from a file. /// std::string mtl_search_path; ObjReaderConfig() : triangulate(true), vertex_color(true) {} }; /// /// Wavefront .obj reader class(v2 API) /// class ObjReader { public: ObjReader() : valid_(false) {} ~ObjReader() {} /// /// Load .obj and .mtl from a file. /// /// @param[in] filename wavefront .obj filename /// @param[in] config Reader configuration /// bool ParseFromFile(const std::string &filename, const ObjReaderConfig &config = ObjReaderConfig()); /// /// Parse .obj from a text string. /// Need to supply .mtl text string by `mtl_text`. /// This function ignores `mtllib` line in .obj text. /// /// @param[in] obj_text wavefront .obj filename /// @param[in] mtl_text wavefront .mtl filename /// @param[in] config Reader configuration /// bool ParseFromString(const std::string &obj_text, const std::string &mtl_text, const ObjReaderConfig &config = ObjReaderConfig()); /// /// .obj was loaded or parsed correctly. /// bool Valid() const { return valid_; } const attrib_t &GetAttrib() const { return attrib_; } const std::vector<shape_t> &GetShapes() const { return shapes_; } const std::vector<material_t> &GetMaterials() const { return materials_; } /// /// Warning message(may be filled after `Load` or `Parse`) /// const std::string &Warning() const { return warning_; } /// /// Error message(filled when `Load` or `Parse` failed) /// const std::string &Error() const { return error_; } private: bool valid_; attrib_t attrib_; std::vector<shape_t> shapes_; std::vector<material_t> materials_; std::string warning_; std::string error_; }; /// ==>>========= Legacy v1 API ============================================= /// Loads .obj from a file. /// 'attrib', 'shapes' and 'materials' will be filled with parsed shape data /// 'shapes' will be filled with parsed shape data /// Returns true when loading .obj become success. /// Returns warning message into `warn`, and error message into `err` /// 'mtl_basedir' is optional, and used for base directory for .mtl file. /// In default(`NULL'), .mtl file is searched from an application's working /// directory. /// 'triangulate' is optional, and used whether triangulate polygon face in .obj /// or not. /// Option 'default_vcols_fallback' specifies whether vertex colors should /// always be defined, even if no colors are given (fallback to white). bool LoadObj(attrib_t *attrib, std::vector<shape_t> *shapes, std::vector<material_t> *materials, std::string *warn, std::string *err, const char *filename, const char *mtl_basedir = NULL, bool triangulate = true, bool default_vcols_fallback = true); /// Loads .obj from a file with custom user callback. /// .mtl is loaded as usual and parsed material_t data will be passed to /// `callback.mtllib_cb`. /// Returns true when loading .obj/.mtl become success. /// Returns warning message into `warn`, and error message into `err` /// See `examples/callback_api/` for how to use this function. bool LoadObjWithCallback(std::istream &inStream, const callback_t &callback, void *user_data = NULL, MaterialReader *readMatFn = NULL, std::string *warn = NULL, std::string *err = NULL); /// Loads object from a std::istream, uses `readMatFn` to retrieve /// std::istream for materials. /// Returns true when loading .obj become success. /// Returns warning and error message into `err` bool LoadObj(attrib_t *attrib, std::vector<shape_t> *shapes, std::vector<material_t> *materials, std::string *warn, std::string *err, std::istream *inStream, MaterialReader *readMatFn = NULL, bool triangulate = true, bool default_vcols_fallback = true); /// Loads materials into std::map void LoadMtl(std::map<std::string, int> *material_map, std::vector<material_t> *materials, std::istream *inStream, std::string *warning, std::string *err); /// /// Parse texture name and texture option for custom texture parameter through /// material::unknown_parameter /// /// @param[out] texname Parsed texture name /// @param[out] texopt Parsed texopt /// @param[in] linebuf Input string /// bool ParseTextureNameAndOption(std::string *texname, texture_option_t *texopt, const char *linebuf); /// =<<========== Legacy v1 API ============================================= } // namespace tinyobj #endif // TINY_OBJ_LOADER_H_ #ifdef TINYOBJLOADER_IMPLEMENTATION #include <cassert> #include <cctype> #include <cmath> #include <cstddef> #include <cstdlib> #include <cstring> #include <limits> #include <utility> #include <fstream> #include <sstream> namespace tinyobj { MaterialReader::~MaterialReader() {} struct vertex_index_t { int v_idx, vt_idx, vn_idx; vertex_index_t() : v_idx(-1), vt_idx(-1), vn_idx(-1) {} explicit vertex_index_t(int idx) : v_idx(idx), vt_idx(idx), vn_idx(idx) {} vertex_index_t(int vidx, int vtidx, int vnidx) : v_idx(vidx), vt_idx(vtidx), vn_idx(vnidx) {} }; // Internal data structure for face representation // index + smoothing group. struct face_t { unsigned int smoothing_group_id; // smoothing group id. 0 = smoothing groupd is off. int pad_; std::vector<vertex_index_t> vertex_indices; // face vertex indices. face_t() : smoothing_group_id(0), pad_(0) {} }; // Internal data structure for line representation struct __line_t { // l v1/vt1 v2/vt2 ... // In the specification, line primitrive does not have normal index, but // TinyObjLoader allow it std::vector<vertex_index_t> vertex_indices; }; // Internal data structure for points representation struct __points_t { // p v1 v2 ... // In the specification, point primitrive does not have normal index and // texture coord index, but TinyObjLoader allow it. std::vector<vertex_index_t> vertex_indices; }; struct tag_sizes { tag_sizes() : num_ints(0), num_reals(0), num_strings(0) {} int num_ints; int num_reals; int num_strings; }; struct obj_shape { std::vector<real_t> v; std::vector<real_t> vn; std::vector<real_t> vt; }; // // Manages group of primitives(face, line, points, ...) struct PrimGroup { std::vector<face_t> faceGroup; std::vector<__line_t> lineGroup; std::vector<__points_t> pointsGroup; void clear() { faceGroup.clear(); lineGroup.clear(); pointsGroup.clear(); } bool IsEmpty() const { return faceGroup.empty() && lineGroup.empty() && pointsGroup.empty(); } // TODO(syoyo): bspline, surface, ... }; // See // http://stackoverflow.com/questions/6089231/getting-std-ifstream-to-handle-lf-cr-and-crlf static std::istream &safeGetline(std::istream &is, std::string &t) { t.clear(); // The characters in the stream are read one-by-one using a std::streambuf. // That is faster than reading them one-by-one using the std::istream. // Code that uses streambuf this way must be guarded by a sentry object. // The sentry object performs various tasks, // such as thread synchronization and updating the stream state. std::istream::sentry se(is, true); std::streambuf *sb = is.rdbuf(); if (se) { for (;;) { int c = sb->sbumpc(); switch (c) { case '\n': return is; case '\r': if (sb->sgetc() == '\n') sb->sbumpc(); return is; case EOF: // Also handle the case when the last line has no line ending if (t.empty()) is.setstate(std::ios::eofbit); return is; default: t += static_cast<char>(c); } } } return is; } #define IS_SPACE(x) (((x) == ' ') || ((x) == '\t')) #define IS_DIGIT(x) \ (static_cast<unsigned int>((x) - '0') < static_cast<unsigned int>(10)) #define IS_NEW_LINE(x) (((x) == '\r') || ((x) == '\n') || ((x) == '\0')) // Make index zero-base, and also support relative index. static inline bool fixIndex(int idx, int n, int *ret) { if (!ret) { return false; } if (idx > 0) { (*ret) = idx - 1; return true; } if (idx == 0) { // zero is not allowed according to the spec. return false; } if (idx < 0) { (*ret) = n + idx; // negative value = relative return true; } return false; // never reach here. } static inline std::string parseString(const char **token) { std::string s; (*token) += strspn((*token), " \t"); size_t e = strcspn((*token), " \t\r"); s = std::string((*token), &(*token)[e]); (*token) += e; return s; } static inline int parseInt(const char **token) { (*token) += strspn((*token), " \t"); int i = atoi((*token)); (*token) += strcspn((*token), " \t\r"); return i; } // Tries to parse a floating point number located at s. // // s_end should be a location in the string where reading should absolutely // stop. For example at the end of the string, to prevent buffer overflows. // // Parses the following EBNF grammar: // sign = "+" | "-" ; // END = ? anything not in digit ? // digit = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9" ; // integer = [sign] , digit , {digit} ; // decimal = integer , ["." , integer] ; // float = ( decimal , END ) | ( decimal , ("E" | "e") , integer , END ) ; // // Valid strings are for example: // -0 +3.1417e+2 -0.0E-3 1.0324 -1.41 11e2 // // If the parsing is a success, result is set to the parsed value and true // is returned. // // The function is greedy and will parse until any of the following happens: // - a non-conforming character is encountered. // - s_end is reached. // // The following situations triggers a failure: // - s >= s_end. // - parse failure. // static bool tryParseDouble(const char *s, const char *s_end, double *result) { if (s >= s_end) { return false; } double mantissa = 0.0; // This exponent is base 2 rather than 10. // However the exponent we parse is supposed to be one of ten, // thus we must take care to convert the exponent/and or the // mantissa to a * 2^E, where a is the mantissa and E is the // exponent. // To get the final double we will use ldexp, it requires the // exponent to be in base 2. int exponent = 0; // NOTE: THESE MUST BE DECLARED HERE SINCE WE ARE NOT ALLOWED // TO JUMP OVER DEFINITIONS. char sign = '+'; char exp_sign = '+'; char const *curr = s; // How many characters were read in a loop. int read = 0; // Tells whether a loop terminated due to reaching s_end. bool end_not_reached = false; bool leading_decimal_dots = false; /* BEGIN PARSING. */ // Find out what sign we've got. if (*curr == '+' || *curr == '-') { sign = *curr; curr++; if ((curr != s_end) && (*curr == '.')) { // accept. Somethig like `.7e+2`, `-.5234` leading_decimal_dots = true; } } else if (IS_DIGIT(*curr)) { /* Pass through. */ } else if (*curr == '.') { // accept. Somethig like `.7e+2`, `-.5234` leading_decimal_dots = true; } else { goto fail; } // Read the integer part. end_not_reached = (curr != s_end); if (!leading_decimal_dots) { while (end_not_reached && IS_DIGIT(*curr)) { mantissa *= 10; mantissa += static_cast<int>(*curr - 0x30); curr++; read++; end_not_reached = (curr != s_end); } } // We must make sure we actually got something. if (!leading_decimal_dots) { if (read == 0) goto fail; } // We allow numbers of form "#", "###" etc. if (!end_not_reached) goto assemble; // Read the decimal part. if (*curr == '.') { curr++; read = 1; end_not_reached = (curr != s_end); while (end_not_reached && IS_DIGIT(*curr)) { static const double pow_lut[] = { 1.0, 0.1, 0.01, 0.001, 0.0001, 0.00001, 0.000001, 0.0000001, }; const int lut_entries = sizeof pow_lut / sizeof pow_lut[0]; // NOTE: Don't use powf here, it will absolutely murder precision. mantissa += static_cast<int>(*curr - 0x30) * (read < lut_entries ? pow_lut[read] : std::pow(10.0, -read)); read++; curr++; end_not_reached = (curr != s_end); } } else if (*curr == 'e' || *curr == 'E') { } else { goto assemble; } if (!end_not_reached) goto assemble; // Read the exponent part. if (*curr == 'e' || *curr == 'E') { curr++; // Figure out if a sign is present and if it is. end_not_reached = (curr != s_end); if (end_not_reached && (*curr == '+' || *curr == '-')) { exp_sign = *curr; curr++; } else if (IS_DIGIT(*curr)) { /* Pass through. */ } else { // Empty E is not allowed. goto fail; } read = 0; end_not_reached = (curr != s_end); while (end_not_reached && IS_DIGIT(*curr)) { exponent *= 10; exponent += static_cast<int>(*curr - 0x30); curr++; read++; end_not_reached = (curr != s_end); } exponent *= (exp_sign == '+' ? 1 : -1); if (read == 0) goto fail; } assemble: *result = (sign == '+' ? 1 : -1) * (exponent ? std::ldexp(mantissa * std::pow(5.0, exponent), exponent) : mantissa); return true; fail: return false; } static inline real_t parseReal(const char **token, double default_value = 0.0) { (*token) += strspn((*token), " \t"); const char *end = (*token) + strcspn((*token), " \t\r"); double val = default_value; tryParseDouble((*token), end, &val); real_t f = static_cast<real_t>(val); (*token) = end; return f; } static inline bool parseReal(const char **token, real_t *out) { (*token) += strspn((*token), " \t"); const char *end = (*token) + strcspn((*token), " \t\r"); double val; bool ret = tryParseDouble((*token), end, &val); if (ret) { real_t f = static_cast<real_t>(val); (*out) = f; } (*token) = end; return ret; } static inline void parseReal2(real_t *x, real_t *y, const char **token, const double default_x = 0.0, const double default_y = 0.0) { (*x) = parseReal(token, default_x); (*y) = parseReal(token, default_y); } static inline void parseReal3(real_t *x, real_t *y, real_t *z, const char **token, const double default_x = 0.0, const double default_y = 0.0, const double default_z = 0.0) { (*x) = parseReal(token, default_x); (*y) = parseReal(token, default_y); (*z) = parseReal(token, default_z); } static inline void parseV(real_t *x, real_t *y, real_t *z, real_t *w, const char **token, const double default_x = 0.0, const double default_y = 0.0, const double default_z = 0.0, const double default_w = 1.0) { (*x) = parseReal(token, default_x); (*y) = parseReal(token, default_y); (*z) = parseReal(token, default_z); (*w) = parseReal(token, default_w); } // Extension: parse vertex with colors(6 items) static inline bool parseVertexWithColor(real_t *x, real_t *y, real_t *z, real_t *r, real_t *g, real_t *b, const char **token, const double default_x = 0.0, const double default_y = 0.0, const double default_z = 0.0) { (*x) = parseReal(token, default_x); (*y) = parseReal(token, default_y); (*z) = parseReal(token, default_z); const bool found_color = parseReal(token, r) && parseReal(token, g) && parseReal(token, b); if (!found_color) { (*r) = (*g) = (*b) = 1.0; } |
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