1040 lines
27 KiB
C
1040 lines
27 KiB
C
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//
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// Copyright 2012-2015, Syoyo Fujita.
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//
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// Licensed under 2-clause BSD license.
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//
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//
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// version 0.9.16: Make tinyobjloader header-only
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// version 0.9.15: Change API to handle no mtl file case correctly(#58)
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// version 0.9.14: Support specular highlight, bump, displacement and alpha map(#53)
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// version 0.9.13: Report "Material file not found message" in `err`(#46)
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// version 0.9.12: Fix groups being ignored if they have 'usemtl' just before 'g' (#44)
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// version 0.9.11: Invert `Tr` parameter(#43)
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// version 0.9.10: Fix seg fault on windows.
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// version 0.9.9 : Replace atof() with custom parser.
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// version 0.9.8 : Fix multi-materials(per-face material ID).
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// version 0.9.7 : Support multi-materials(per-face material ID) per
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// object/group.
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// version 0.9.6 : Support Ni(index of refraction) mtl parameter.
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// Parse transmittance material parameter correctly.
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// version 0.9.5 : Parse multiple group name.
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// Add support of specifying the base path to load material file.
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// version 0.9.4 : Initial support of group tag(g)
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// version 0.9.3 : Fix parsing triple 'x/y/z'
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// version 0.9.2 : Add more .mtl load support
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// version 0.9.1 : Add initial .mtl load support
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// version 0.9.0 : Initial
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//
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//
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// Use this in *one* .cc
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// #define TINYOBJLOADER_IMPLEMENTATION
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// #include "tiny_obj_loader.h"
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//
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#ifndef TINY_OBJ_LOADER_H
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#define TINY_OBJ_LOADER_H
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#include <string>
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#include <vector>
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#include <map>
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namespace tinyobj {
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typedef struct {
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std::string name;
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float ambient[3];
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float diffuse[3];
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float specular[3];
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float transmittance[3];
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float emission[3];
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float shininess;
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float ior; // index of refraction
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float dissolve; // 1 == opaque; 0 == fully transparent
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// illumination model (see http://www.fileformat.info/format/material/)
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int illum;
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int dummy; // Suppress padding warning.
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std::string ambient_texname; // map_Ka
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std::string diffuse_texname; // map_Kd
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std::string specular_texname; // map_Ks
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std::string specular_highlight_texname; // map_Ns
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std::string bump_texname; // map_bump, bump
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std::string displacement_texname; // disp
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std::string alpha_texname; // map_d
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std::map<std::string, std::string> unknown_parameter;
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} material_t;
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typedef struct {
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std::vector<float> positions;
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std::vector<float> normals;
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std::vector<float> texcoords;
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std::vector<unsigned int> indices;
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std::vector<int> material_ids; // per-mesh material ID
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} mesh_t;
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typedef struct {
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std::string name;
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mesh_t mesh;
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} shape_t;
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class MaterialReader {
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public:
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MaterialReader() {}
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virtual ~MaterialReader();
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virtual bool operator()(const std::string &matId,
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std::vector<material_t> &materials,
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std::map<std::string, int> &matMap,
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std::string &err) = 0;
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};
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class MaterialFileReader : public MaterialReader {
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public:
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MaterialFileReader(const std::string &mtl_basepath)
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: m_mtlBasePath(mtl_basepath) {}
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virtual ~MaterialFileReader() {}
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virtual bool operator()(const std::string &matId,
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std::vector<material_t> &materials,
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std::map<std::string, int> &matMap,
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std::string &err);
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private:
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std::string m_mtlBasePath;
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};
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/// Loads .obj from a file.
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/// 'shapes' will be filled with parsed shape data
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/// The function returns error string.
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/// Returns true when loading .obj become success.
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/// Returns warning and error message into `err`
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/// 'mtl_basepath' is optional, and used for base path for .mtl file.
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bool LoadObj(std::vector<shape_t> &shapes, // [output]
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std::vector<material_t> &materials, // [output]
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std::string& err, // [output]
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const char *filename, const char *mtl_basepath = NULL);
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/// Loads object from a std::istream, uses GetMtlIStreamFn to retrieve
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/// std::istream for materials.
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/// Returns true when loading .obj become success.
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/// Returns warning and error message into `err`
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bool LoadObj(std::vector<shape_t> &shapes, // [output]
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std::vector<material_t> &materials, // [output]
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std::string& err, // [output]
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std::istream &inStream, MaterialReader &readMatFn);
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/// Loads materials into std::map
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void LoadMtl(std::map<std::string, int> &material_map, // [output]
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std::vector<material_t> &materials, // [output]
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std::istream &inStream);
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}
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#ifdef TINYOBJLOADER_IMPLEMENTATION
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#include <cstdlib>
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#include <cstring>
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#include <cassert>
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#include <cmath>
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#include <cstddef>
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#include <cctype>
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#include <string>
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#include <vector>
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#include <map>
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#include <fstream>
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#include <sstream>
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#include "tiny_obj_loader.h"
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namespace tinyobj {
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MaterialReader::~MaterialReader() {}
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#define TINYOBJ_SSCANF_BUFFER_SIZE (4096)
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struct vertex_index {
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int v_idx, vt_idx, vn_idx;
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vertex_index(){}
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vertex_index(int idx) : v_idx(idx), vt_idx(idx), vn_idx(idx){}
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vertex_index(int vidx, int vtidx, int vnidx)
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: v_idx(vidx), vt_idx(vtidx), vn_idx(vnidx){}
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};
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// for std::map
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static inline bool operator<(const vertex_index &a, const vertex_index &b) {
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if (a.v_idx != b.v_idx)
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return (a.v_idx < b.v_idx);
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if (a.vn_idx != b.vn_idx)
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return (a.vn_idx < b.vn_idx);
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if (a.vt_idx != b.vt_idx)
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return (a.vt_idx < b.vt_idx);
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return false;
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}
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struct obj_shape {
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std::vector<float> v;
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std::vector<float> vn;
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std::vector<float> vt;
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};
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static inline bool isSpace(const char c) { return (c == ' ') || (c == '\t'); }
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static inline bool isNewLine(const char c) {
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return (c == '\r') || (c == '\n') || (c == '\0');
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}
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// Make index zero-base, and also support relative index.
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static inline int fixIndex(int idx, int n) {
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if (idx > 0) return idx - 1;
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if (idx == 0) return 0;
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return n + idx; // negative value = relative
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}
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static inline std::string parseString(const char *&token) {
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std::string s;
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token += strspn(token, " \t");
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size_t e = strcspn(token, " \t\r");
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s = std::string(token, &token[e]);
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token += e;
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return s;
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}
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static inline int parseInt(const char *&token) {
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token += strspn(token, " \t");
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int i = atoi(token);
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token += strcspn(token, " \t\r");
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return i;
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}
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// Tries to parse a floating point number located at s.
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//
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// s_end should be a location in the string where reading should absolutely
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// stop. For example at the end of the string, to prevent buffer overflows.
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//
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// Parses the following EBNF grammar:
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// sign = "+" | "-" ;
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// END = ? anything not in digit ?
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// digit = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9" ;
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// integer = [sign] , digit , {digit} ;
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// decimal = integer , ["." , integer] ;
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// float = ( decimal , END ) | ( decimal , ("E" | "e") , integer , END ) ;
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//
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// Valid strings are for example:
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// -0 +3.1417e+2 -0.0E-3 1.0324 -1.41 11e2
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//
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// If the parsing is a success, result is set to the parsed value and true
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// is returned.
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//
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// The function is greedy and will parse until any of the following happens:
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// - a non-conforming character is encountered.
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// - s_end is reached.
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//
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// The following situations triggers a failure:
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// - s >= s_end.
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// - parse failure.
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//
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static bool tryParseDouble(const char *s, const char *s_end, double *result)
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{
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if (s >= s_end)
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{
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return false;
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}
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double mantissa = 0.0;
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// This exponent is base 2 rather than 10.
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// However the exponent we parse is supposed to be one of ten,
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// thus we must take care to convert the exponent/and or the
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// mantissa to a * 2^E, where a is the mantissa and E is the
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// exponent.
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// To get the final double we will use ldexp, it requires the
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// exponent to be in base 2.
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int exponent = 0;
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// NOTE: THESE MUST BE DECLARED HERE SINCE WE ARE NOT ALLOWED
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// TO JUMP OVER DEFINITIONS.
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char sign = '+';
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char exp_sign = '+';
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char const *curr = s;
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// How many characters were read in a loop.
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int read = 0;
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// Tells whether a loop terminated due to reaching s_end.
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bool end_not_reached = false;
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/*
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BEGIN PARSING.
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*/
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// Find out what sign we've got.
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if (*curr == '+' || *curr == '-')
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{
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sign = *curr;
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curr++;
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}
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else if (isdigit(*curr)) { /* Pass through. */ }
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else
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{
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goto fail;
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}
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// Read the integer part.
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while ((end_not_reached = (curr != s_end)) && isdigit(*curr))
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{
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mantissa *= 10;
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mantissa += static_cast<int>(*curr - 0x30);
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curr++; read++;
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}
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// We must make sure we actually got something.
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if (read == 0)
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goto fail;
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// We allow numbers of form "#", "###" etc.
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if (!end_not_reached)
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goto assemble;
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// Read the decimal part.
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if (*curr == '.')
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{
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curr++;
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read = 1;
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while ((end_not_reached = (curr != s_end)) && isdigit(*curr))
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{
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// NOTE: Don't use powf here, it will absolutely murder precision.
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mantissa += static_cast<int>(*curr - 0x30) * pow(10.0, -read);
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read++; curr++;
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}
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}
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else if (*curr == 'e' || *curr == 'E') {}
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else
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{
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goto assemble;
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}
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if (!end_not_reached)
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goto assemble;
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// Read the exponent part.
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if (*curr == 'e' || *curr == 'E')
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{
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curr++;
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// Figure out if a sign is present and if it is.
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if ((end_not_reached = (curr != s_end)) && (*curr == '+' || *curr == '-'))
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{
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exp_sign = *curr;
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curr++;
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}
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else if (isdigit(*curr)) { /* Pass through. */ }
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else
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{
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// Empty E is not allowed.
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goto fail;
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}
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read = 0;
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while ((end_not_reached = (curr != s_end)) && isdigit(*curr))
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{
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exponent *= 10;
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exponent += static_cast<int>(*curr - 0x30);
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curr++; read++;
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}
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exponent *= (exp_sign == '+'? 1 : -1);
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if (read == 0)
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goto fail;
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}
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assemble:
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*result = (sign == '+'? 1 : -1) * ldexp(mantissa * pow(5.0, exponent), exponent);
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return true;
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fail:
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return false;
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}
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||
|
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static inline float parseFloat(const char *&token) {
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token += strspn(token, " \t");
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#ifdef TINY_OBJ_LOADER_OLD_FLOAT_PARSER
|
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float f = (float)atof(token);
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||
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token += strcspn(token, " \t\r");
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#else
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const char *end = token + strcspn(token, " \t\r");
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double val = 0.0;
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|
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tryParseDouble(token, end, &val);
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float f = static_cast<float>(val);
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||
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token = end;
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||
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#endif
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||
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return f;
|
||
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}
|
||
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|
||
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|
||
|
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static inline void parseFloat2(float &x, float &y, const char *&token) {
|
||
|
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x = parseFloat(token);
|
||
|
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y = parseFloat(token);
|
||
|
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}
|
||
|
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|
||
|
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static inline void parseFloat3(float &x, float &y, float &z,
|
||
|
|
const char *&token) {
|
||
|
|
x = parseFloat(token);
|
||
|
|
y = parseFloat(token);
|
||
|
|
z = parseFloat(token);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Parse triples: i, i/j/k, i//k, i/j
|
||
|
|
static vertex_index parseTriple(const char *&token, int vsize, int vnsize,
|
||
|
|
int vtsize) {
|
||
|
|
vertex_index vi(-1);
|
||
|
|
|
||
|
|
vi.v_idx = fixIndex(atoi(token), vsize);
|
||
|
|
token += strcspn(token, "/ \t\r");
|
||
|
|
if (token[0] != '/') {
|
||
|
|
return vi;
|
||
|
|
}
|
||
|
|
token++;
|
||
|
|
|
||
|
|
// i//k
|
||
|
|
if (token[0] == '/') {
|
||
|
|
token++;
|
||
|
|
vi.vn_idx = fixIndex(atoi(token), vnsize);
|
||
|
|
token += strcspn(token, "/ \t\r");
|
||
|
|
return vi;
|
||
|
|
}
|
||
|
|
|
||
|
|
// i/j/k or i/j
|
||
|
|
vi.vt_idx = fixIndex(atoi(token), vtsize);
|
||
|
|
token += strcspn(token, "/ \t\r");
|
||
|
|
if (token[0] != '/') {
|
||
|
|
return vi;
|
||
|
|
}
|
||
|
|
|
||
|
|
// i/j/k
|
||
|
|
token++; // skip '/'
|
||
|
|
vi.vn_idx = fixIndex(atoi(token), vnsize);
|
||
|
|
token += strcspn(token, "/ \t\r");
|
||
|
|
return vi;
|
||
|
|
}
|
||
|
|
|
||
|
|
static unsigned int
|
||
|
|
updateVertex(std::map<vertex_index, unsigned int> &vertexCache,
|
||
|
|
std::vector<float> &positions, std::vector<float> &normals,
|
||
|
|
std::vector<float> &texcoords,
|
||
|
|
const std::vector<float> &in_positions,
|
||
|
|
const std::vector<float> &in_normals,
|
||
|
|
const std::vector<float> &in_texcoords, const vertex_index &i) {
|
||
|
|
const std::map<vertex_index, unsigned int>::iterator it = vertexCache.find(i);
|
||
|
|
|
||
|
|
if (it != vertexCache.end()) {
|
||
|
|
// found cache
|
||
|
|
return it->second;
|
||
|
|
}
|
||
|
|
|
||
|
|
assert(in_positions.size() > static_cast<unsigned int>(3 * i.v_idx + 2));
|
||
|
|
|
||
|
|
positions.push_back(in_positions[3 * static_cast<size_t>(i.v_idx) + 0]);
|
||
|
|
positions.push_back(in_positions[3 * static_cast<size_t>(i.v_idx) + 1]);
|
||
|
|
positions.push_back(in_positions[3 * static_cast<size_t>(i.v_idx) + 2]);
|
||
|
|
|
||
|
|
if (i.vn_idx >= 0) {
|
||
|
|
normals.push_back(in_normals[3 * static_cast<size_t>(i.vn_idx) + 0]);
|
||
|
|
normals.push_back(in_normals[3 * static_cast<size_t>(i.vn_idx) + 1]);
|
||
|
|
normals.push_back(in_normals[3 * static_cast<size_t>(i.vn_idx) + 2]);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (i.vt_idx >= 0) {
|
||
|
|
texcoords.push_back(in_texcoords[2 * static_cast<size_t>(i.vt_idx) + 0]);
|
||
|
|
texcoords.push_back(in_texcoords[2 * static_cast<size_t>(i.vt_idx) + 1]);
|
||
|
|
}
|
||
|
|
|
||
|
|
unsigned int idx = static_cast<unsigned int>(positions.size() / 3 - 1);
|
||
|
|
vertexCache[i] = idx;
|
||
|
|
|
||
|
|
return idx;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void InitMaterial(material_t &material) {
|
||
|
|
material.name = "";
|
||
|
|
material.ambient_texname = "";
|
||
|
|
material.diffuse_texname = "";
|
||
|
|
material.specular_texname = "";
|
||
|
|
material.specular_highlight_texname = "";
|
||
|
|
material.bump_texname = "";
|
||
|
|
material.displacement_texname = "";
|
||
|
|
material.alpha_texname = "";
|
||
|
|
for (int i = 0; i < 3; i++) {
|
||
|
|
material.ambient[i] = 0.f;
|
||
|
|
material.diffuse[i] = 0.f;
|
||
|
|
material.specular[i] = 0.f;
|
||
|
|
material.transmittance[i] = 0.f;
|
||
|
|
material.emission[i] = 0.f;
|
||
|
|
}
|
||
|
|
material.illum = 0;
|
||
|
|
material.dissolve = 1.f;
|
||
|
|
material.shininess = 1.f;
|
||
|
|
material.ior = 1.f;
|
||
|
|
material.unknown_parameter.clear();
|
||
|
|
}
|
||
|
|
|
||
|
|
static bool exportFaceGroupToShape(
|
||
|
|
shape_t &shape, std::map<vertex_index, unsigned int> vertexCache,
|
||
|
|
const std::vector<float> &in_positions,
|
||
|
|
const std::vector<float> &in_normals,
|
||
|
|
const std::vector<float> &in_texcoords,
|
||
|
|
const std::vector<std::vector<vertex_index> > &faceGroup,
|
||
|
|
const int material_id, const std::string &name, bool clearCache) {
|
||
|
|
if (faceGroup.empty()) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Flatten vertices and indices
|
||
|
|
for (size_t i = 0; i < faceGroup.size(); i++) {
|
||
|
|
const std::vector<vertex_index> &face = faceGroup[i];
|
||
|
|
|
||
|
|
vertex_index i0 = face[0];
|
||
|
|
vertex_index i1(-1);
|
||
|
|
vertex_index i2 = face[1];
|
||
|
|
|
||
|
|
size_t npolys = face.size();
|
||
|
|
|
||
|
|
// Polygon -> triangle fan conversion
|
||
|
|
for (size_t k = 2; k < npolys; k++) {
|
||
|
|
i1 = i2;
|
||
|
|
i2 = face[k];
|
||
|
|
|
||
|
|
unsigned int v0 = updateVertex(
|
||
|
|
vertexCache, shape.mesh.positions, shape.mesh.normals,
|
||
|
|
shape.mesh.texcoords, in_positions, in_normals, in_texcoords, i0);
|
||
|
|
unsigned int v1 = updateVertex(
|
||
|
|
vertexCache, shape.mesh.positions, shape.mesh.normals,
|
||
|
|
shape.mesh.texcoords, in_positions, in_normals, in_texcoords, i1);
|
||
|
|
unsigned int v2 = updateVertex(
|
||
|
|
vertexCache, shape.mesh.positions, shape.mesh.normals,
|
||
|
|
shape.mesh.texcoords, in_positions, in_normals, in_texcoords, i2);
|
||
|
|
|
||
|
|
shape.mesh.indices.push_back(v0);
|
||
|
|
shape.mesh.indices.push_back(v1);
|
||
|
|
shape.mesh.indices.push_back(v2);
|
||
|
|
|
||
|
|
shape.mesh.material_ids.push_back(material_id);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
shape.name = name;
|
||
|
|
|
||
|
|
if (clearCache)
|
||
|
|
vertexCache.clear();
|
||
|
|
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
void LoadMtl(std::map<std::string, int> &material_map,
|
||
|
|
std::vector<material_t> &materials,
|
||
|
|
std::istream &inStream) {
|
||
|
|
|
||
|
|
// Create a default material anyway.
|
||
|
|
material_t material;
|
||
|
|
InitMaterial(material);
|
||
|
|
|
||
|
|
size_t maxchars = 8192; // Alloc enough size.
|
||
|
|
std::vector<char> buf(maxchars); // Alloc enough size.
|
||
|
|
while (inStream.peek() != -1) {
|
||
|
|
inStream.getline(&buf[0], static_cast<std::streamsize>(maxchars));
|
||
|
|
|
||
|
|
std::string linebuf(&buf[0]);
|
||
|
|
|
||
|
|
// Trim newline '\r\n' or '\n'
|
||
|
|
if (linebuf.size() > 0) {
|
||
|
|
if (linebuf[linebuf.size() - 1] == '\n')
|
||
|
|
linebuf.erase(linebuf.size() - 1);
|
||
|
|
}
|
||
|
|
if (linebuf.size() > 0) {
|
||
|
|
if (linebuf[linebuf.size() - 1] == '\r')
|
||
|
|
linebuf.erase(linebuf.size() - 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Skip if empty line.
|
||
|
|
if (linebuf.empty()) {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Skip leading space.
|
||
|
|
const char *token = linebuf.c_str();
|
||
|
|
token += strspn(token, " \t");
|
||
|
|
|
||
|
|
assert(token);
|
||
|
|
if (token[0] == '\0')
|
||
|
|
continue; // empty line
|
||
|
|
|
||
|
|
if (token[0] == '#')
|
||
|
|
continue; // comment line
|
||
|
|
|
||
|
|
// new mtl
|
||
|
|
if ((0 == strncmp(token, "newmtl", 6)) && isSpace((token[6]))) {
|
||
|
|
// flush previous material.
|
||
|
|
if (!material.name.empty()) {
|
||
|
|
material_map.insert(
|
||
|
|
std::pair<std::string, int>(material.name, static_cast<int>(materials.size())));
|
||
|
|
materials.push_back(material);
|
||
|
|
}
|
||
|
|
|
||
|
|
// initial temporary material
|
||
|
|
InitMaterial(material);
|
||
|
|
|
||
|
|
// set new mtl name
|
||
|
|
char namebuf[TINYOBJ_SSCANF_BUFFER_SIZE];
|
||
|
|
token += 7;
|
||
|
|
#ifdef _MSC_VER
|
||
|
|
sscanf_s(token, "%s", namebuf, (unsigned)_countof(namebuf));
|
||
|
|
#else
|
||
|
|
sscanf(token, "%s", namebuf);
|
||
|
|
#endif
|
||
|
|
material.name = namebuf;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// ambient
|
||
|
|
if (token[0] == 'K' && token[1] == 'a' && isSpace((token[2]))) {
|
||
|
|
token += 2;
|
||
|
|
float r, g, b;
|
||
|
|
parseFloat3(r, g, b, token);
|
||
|
|
material.ambient[0] = r;
|
||
|
|
material.ambient[1] = g;
|
||
|
|
material.ambient[2] = b;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// diffuse
|
||
|
|
if (token[0] == 'K' && token[1] == 'd' && isSpace((token[2]))) {
|
||
|
|
token += 2;
|
||
|
|
float r, g, b;
|
||
|
|
parseFloat3(r, g, b, token);
|
||
|
|
material.diffuse[0] = r;
|
||
|
|
material.diffuse[1] = g;
|
||
|
|
material.diffuse[2] = b;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// specular
|
||
|
|
if (token[0] == 'K' && token[1] == 's' && isSpace((token[2]))) {
|
||
|
|
token += 2;
|
||
|
|
float r, g, b;
|
||
|
|
parseFloat3(r, g, b, token);
|
||
|
|
material.specular[0] = r;
|
||
|
|
material.specular[1] = g;
|
||
|
|
material.specular[2] = b;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// transmittance
|
||
|
|
if (token[0] == 'K' && token[1] == 't' && isSpace((token[2]))) {
|
||
|
|
token += 2;
|
||
|
|
float r, g, b;
|
||
|
|
parseFloat3(r, g, b, token);
|
||
|
|
material.transmittance[0] = r;
|
||
|
|
material.transmittance[1] = g;
|
||
|
|
material.transmittance[2] = b;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// ior(index of refraction)
|
||
|
|
if (token[0] == 'N' && token[1] == 'i' && isSpace((token[2]))) {
|
||
|
|
token += 2;
|
||
|
|
material.ior = parseFloat(token);
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// emission
|
||
|
|
if (token[0] == 'K' && token[1] == 'e' && isSpace(token[2])) {
|
||
|
|
token += 2;
|
||
|
|
float r, g, b;
|
||
|
|
parseFloat3(r, g, b, token);
|
||
|
|
material.emission[0] = r;
|
||
|
|
material.emission[1] = g;
|
||
|
|
material.emission[2] = b;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// shininess
|
||
|
|
if (token[0] == 'N' && token[1] == 's' && isSpace(token[2])) {
|
||
|
|
token += 2;
|
||
|
|
material.shininess = parseFloat(token);
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// illum model
|
||
|
|
if (0 == strncmp(token, "illum", 5) && isSpace(token[5])) {
|
||
|
|
token += 6;
|
||
|
|
material.illum = parseInt(token);
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// dissolve
|
||
|
|
if ((token[0] == 'd' && isSpace(token[1]))) {
|
||
|
|
token += 1;
|
||
|
|
material.dissolve = parseFloat(token);
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
if (token[0] == 'T' && token[1] == 'r' && isSpace(token[2])) {
|
||
|
|
token += 2;
|
||
|
|
// Invert value of Tr(assume Tr is in range [0, 1])
|
||
|
|
material.dissolve = 1.0f - parseFloat(token);
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// ambient texture
|
||
|
|
if ((0 == strncmp(token, "map_Ka", 6)) && isSpace(token[6])) {
|
||
|
|
token += 7;
|
||
|
|
material.ambient_texname = token;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// diffuse texture
|
||
|
|
if ((0 == strncmp(token, "map_Kd", 6)) && isSpace(token[6])) {
|
||
|
|
token += 7;
|
||
|
|
material.diffuse_texname = token;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// specular texture
|
||
|
|
if ((0 == strncmp(token, "map_Ks", 6)) && isSpace(token[6])) {
|
||
|
|
token += 7;
|
||
|
|
material.specular_texname = token;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// specular highlight texture
|
||
|
|
if ((0 == strncmp(token, "map_Ns", 6)) && isSpace(token[6])) {
|
||
|
|
token += 7;
|
||
|
|
material.specular_highlight_texname = token;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// bump texture
|
||
|
|
if ((0 == strncmp(token, "map_bump", 8)) && isSpace(token[8])) {
|
||
|
|
token += 9;
|
||
|
|
material.bump_texname = token;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// alpha texture
|
||
|
|
if ((0 == strncmp(token, "map_d", 5)) && isSpace(token[5])) {
|
||
|
|
token += 6;
|
||
|
|
material.alpha_texname = token;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// bump texture
|
||
|
|
if ((0 == strncmp(token, "bump", 4)) && isSpace(token[4])) {
|
||
|
|
token += 5;
|
||
|
|
material.bump_texname = token;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// displacement texture
|
||
|
|
if ((0 == strncmp(token, "disp", 4)) && isSpace(token[4])) {
|
||
|
|
token += 5;
|
||
|
|
material.displacement_texname = token;
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// unknown parameter
|
||
|
|
const char *_space = strchr(token, ' ');
|
||
|
|
if (!_space) {
|
||
|
|
_space = strchr(token, '\t');
|
||
|
|
}
|
||
|
|
if (_space) {
|
||
|
|
std::ptrdiff_t len = _space - token;
|
||
|
|
std::string key(token, static_cast<size_t>(len));
|
||
|
|
std::string value = _space + 1;
|
||
|
|
material.unknown_parameter.insert(
|
||
|
|
std::pair<std::string, std::string>(key, value));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// flush last material.
|
||
|
|
material_map.insert(
|
||
|
|
std::pair<std::string, int>(material.name, static_cast<int>(materials.size())));
|
||
|
|
materials.push_back(material);
|
||
|
|
}
|
||
|
|
|
||
|
|
bool MaterialFileReader::operator()(const std::string &matId,
|
||
|
|
std::vector<material_t> &materials,
|
||
|
|
std::map<std::string, int> &matMap,
|
||
|
|
std::string& err) {
|
||
|
|
std::string filepath;
|
||
|
|
|
||
|
|
if (!m_mtlBasePath.empty()) {
|
||
|
|
filepath = std::string(m_mtlBasePath) + matId;
|
||
|
|
} else {
|
||
|
|
filepath = matId;
|
||
|
|
}
|
||
|
|
|
||
|
|
std::ifstream matIStream(filepath.c_str());
|
||
|
|
LoadMtl(matMap, materials, matIStream);
|
||
|
|
if (!matIStream) {
|
||
|
|
std::stringstream ss;
|
||
|
|
ss << "WARN: Material file [ " << filepath << " ] not found. Created a default material.";
|
||
|
|
err += ss.str();
|
||
|
|
}
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool LoadObj(std::vector<shape_t> &shapes, // [output]
|
||
|
|
std::vector<material_t> &materials, // [output]
|
||
|
|
std::string &err,
|
||
|
|
const char *filename, const char *mtl_basepath) {
|
||
|
|
|
||
|
|
shapes.clear();
|
||
|
|
|
||
|
|
std::stringstream errss;
|
||
|
|
|
||
|
|
std::ifstream ifs(filename);
|
||
|
|
if (!ifs) {
|
||
|
|
errss << "Cannot open file [" << filename << "]" << std::endl;
|
||
|
|
err = errss.str();
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
std::string basePath;
|
||
|
|
if (mtl_basepath) {
|
||
|
|
basePath = mtl_basepath;
|
||
|
|
}
|
||
|
|
MaterialFileReader matFileReader(basePath);
|
||
|
|
|
||
|
|
return LoadObj(shapes, materials, err, ifs, matFileReader);
|
||
|
|
}
|
||
|
|
|
||
|
|
bool LoadObj(std::vector<shape_t> &shapes, // [output]
|
||
|
|
std::vector<material_t> &materials, // [output]
|
||
|
|
std::string& err,
|
||
|
|
std::istream &inStream, MaterialReader &readMatFn) {
|
||
|
|
std::stringstream errss;
|
||
|
|
|
||
|
|
std::vector<float> v;
|
||
|
|
std::vector<float> vn;
|
||
|
|
std::vector<float> vt;
|
||
|
|
std::vector<std::vector<vertex_index> > faceGroup;
|
||
|
|
std::string name;
|
||
|
|
|
||
|
|
// material
|
||
|
|
std::map<std::string, int> material_map;
|
||
|
|
std::map<vertex_index, unsigned int> vertexCache;
|
||
|
|
int material = -1;
|
||
|
|
|
||
|
|
shape_t shape;
|
||
|
|
|
||
|
|
int maxchars = 8192; // Alloc enough size.
|
||
|
|
std::vector<char> buf(static_cast<size_t>(maxchars)); // Alloc enough size.
|
||
|
|
while (inStream.peek() != -1) {
|
||
|
|
inStream.getline(&buf[0], maxchars);
|
||
|
|
|
||
|
|
std::string linebuf(&buf[0]);
|
||
|
|
|
||
|
|
// Trim newline '\r\n' or '\n'
|
||
|
|
if (linebuf.size() > 0) {
|
||
|
|
if (linebuf[linebuf.size() - 1] == '\n')
|
||
|
|
linebuf.erase(linebuf.size() - 1);
|
||
|
|
}
|
||
|
|
if (linebuf.size() > 0) {
|
||
|
|
if (linebuf[linebuf.size() - 1] == '\r')
|
||
|
|
linebuf.erase(linebuf.size() - 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Skip if empty line.
|
||
|
|
if (linebuf.empty()) {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Skip leading space.
|
||
|
|
const char *token = linebuf.c_str();
|
||
|
|
token += strspn(token, " \t");
|
||
|
|
|
||
|
|
assert(token);
|
||
|
|
if (token[0] == '\0')
|
||
|
|
continue; // empty line
|
||
|
|
|
||
|
|
if (token[0] == '#')
|
||
|
|
continue; // comment line
|
||
|
|
|
||
|
|
// vertex
|
||
|
|
if (token[0] == 'v' && isSpace((token[1]))) {
|
||
|
|
token += 2;
|
||
|
|
float x, y, z;
|
||
|
|
parseFloat3(x, y, z, token);
|
||
|
|
v.push_back(x);
|
||
|
|
v.push_back(y);
|
||
|
|
v.push_back(z);
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// normal
|
||
|
|
if (token[0] == 'v' && token[1] == 'n' && isSpace((token[2]))) {
|
||
|
|
token += 3;
|
||
|
|
float x, y, z;
|
||
|
|
parseFloat3(x, y, z, token);
|
||
|
|
vn.push_back(x);
|
||
|
|
vn.push_back(y);
|
||
|
|
vn.push_back(z);
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// texcoord
|
||
|
|
if (token[0] == 'v' && token[1] == 't' && isSpace((token[2]))) {
|
||
|
|
token += 3;
|
||
|
|
float x, y;
|
||
|
|
parseFloat2(x, y, token);
|
||
|
|
vt.push_back(x);
|
||
|
|
vt.push_back(y);
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// face
|
||
|
|
if (token[0] == 'f' && isSpace((token[1]))) {
|
||
|
|
token += 2;
|
||
|
|
token += strspn(token, " \t");
|
||
|
|
|
||
|
|
std::vector<vertex_index> face;
|
||
|
|
while (!isNewLine(token[0])) {
|
||
|
|
vertex_index vi =
|
||
|
|
parseTriple(token, static_cast<int>(v.size() / 3), static_cast<int>(vn.size() / 3), static_cast<int>(vt.size() / 2));
|
||
|
|
face.push_back(vi);
|
||
|
|
size_t n = strspn(token, " \t\r");
|
||
|
|
token += n;
|
||
|
|
}
|
||
|
|
|
||
|
|
faceGroup.push_back(face);
|
||
|
|
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// use mtl
|
||
|
|
if ((0 == strncmp(token, "usemtl", 6)) && isSpace((token[6]))) {
|
||
|
|
|
||
|
|
char namebuf[TINYOBJ_SSCANF_BUFFER_SIZE];
|
||
|
|
token += 7;
|
||
|
|
#ifdef _MSC_VER
|
||
|
|
sscanf_s(token, "%s", namebuf, (unsigned)_countof(namebuf));
|
||
|
|
#else
|
||
|
|
sscanf(token, "%s", namebuf);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// Create face group per material.
|
||
|
|
bool ret = exportFaceGroupToShape(shape, vertexCache, v, vn, vt,
|
||
|
|
faceGroup, material, name, true);
|
||
|
|
if (ret) {
|
||
|
|
shapes.push_back(shape);
|
||
|
|
}
|
||
|
|
shape = shape_t();
|
||
|
|
faceGroup.clear();
|
||
|
|
|
||
|
|
if (material_map.find(namebuf) != material_map.end()) {
|
||
|
|
material = material_map[namebuf];
|
||
|
|
} else {
|
||
|
|
// { error!! material not found }
|
||
|
|
material = -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// load mtl
|
||
|
|
if ((0 == strncmp(token, "mtllib", 6)) && isSpace((token[6]))) {
|
||
|
|
char namebuf[TINYOBJ_SSCANF_BUFFER_SIZE];
|
||
|
|
token += 7;
|
||
|
|
#ifdef _MSC_VER
|
||
|
|
sscanf_s(token, "%s", namebuf, (unsigned)_countof(namebuf));
|
||
|
|
#else
|
||
|
|
sscanf(token, "%s", namebuf);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
std::string err_mtl;
|
||
|
|
bool ok = readMatFn(namebuf, materials, material_map, err_mtl);
|
||
|
|
err += err_mtl;
|
||
|
|
|
||
|
|
if (!ok) {
|
||
|
|
faceGroup.clear(); // for safety
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// group name
|
||
|
|
if (token[0] == 'g' && isSpace((token[1]))) {
|
||
|
|
|
||
|
|
// flush previous face group.
|
||
|
|
bool ret = exportFaceGroupToShape(shape, vertexCache, v, vn, vt,
|
||
|
|
faceGroup, material, name, true);
|
||
|
|
if (ret) {
|
||
|
|
shapes.push_back(shape);
|
||
|
|
}
|
||
|
|
|
||
|
|
shape = shape_t();
|
||
|
|
|
||
|
|
// material = -1;
|
||
|
|
faceGroup.clear();
|
||
|
|
|
||
|
|
std::vector<std::string> names;
|
||
|
|
while (!isNewLine(token[0])) {
|
||
|
|
std::string str = parseString(token);
|
||
|
|
names.push_back(str);
|
||
|
|
token += strspn(token, " \t\r"); // skip tag
|
||
|
|
}
|
||
|
|
|
||
|
|
assert(names.size() > 0);
|
||
|
|
|
||
|
|
// names[0] must be 'g', so skip the 0th element.
|
||
|
|
if (names.size() > 1) {
|
||
|
|
name = names[1];
|
||
|
|
} else {
|
||
|
|
name = "";
|
||
|
|
}
|
||
|
|
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// object name
|
||
|
|
if (token[0] == 'o' && isSpace((token[1]))) {
|
||
|
|
|
||
|
|
// flush previous face group.
|
||
|
|
bool ret = exportFaceGroupToShape(shape, vertexCache, v, vn, vt,
|
||
|
|
faceGroup, material, name, true);
|
||
|
|
if (ret) {
|
||
|
|
shapes.push_back(shape);
|
||
|
|
}
|
||
|
|
|
||
|
|
// material = -1;
|
||
|
|
faceGroup.clear();
|
||
|
|
shape = shape_t();
|
||
|
|
|
||
|
|
// @todo { multiple object name? }
|
||
|
|
char namebuf[TINYOBJ_SSCANF_BUFFER_SIZE];
|
||
|
|
token += 2;
|
||
|
|
#ifdef _MSC_VER
|
||
|
|
sscanf_s(token, "%s", namebuf, (unsigned)_countof(namebuf));
|
||
|
|
#else
|
||
|
|
sscanf(token, "%s", namebuf);
|
||
|
|
#endif
|
||
|
|
name = std::string(namebuf);
|
||
|
|
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Ignore unknown command.
|
||
|
|
}
|
||
|
|
|
||
|
|
bool ret = exportFaceGroupToShape(shape, vertexCache, v, vn, vt, faceGroup,
|
||
|
|
material, name, true);
|
||
|
|
if (ret) {
|
||
|
|
shapes.push_back(shape);
|
||
|
|
}
|
||
|
|
faceGroup.clear(); // for safety
|
||
|
|
|
||
|
|
err += errss.str();
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace
|
||
|
|
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif // TINY_OBJ_LOADER_H
|