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material.h
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material.h
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#include "utils.h"
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;
struct texture_option_t {
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 (No default value in the spec.
// We'll use -1)
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).
};
struct material_t {
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
};
static inline texture_type_t parseTextureType(
const char **token, texture_type_t default_value = TEXTURE_TYPE_NONE) {
(*token) += strspn((*token), " \t");
const char *end = (*token) + strcspn((*token), " \t\r");
texture_type_t ty = default_value;
if ((0 == strncmp((*token), "cube_top", strlen("cube_top")))) {
ty = TEXTURE_TYPE_CUBE_TOP;
} else if ((0 == strncmp((*token), "cube_bottom", strlen("cube_bottom")))) {
ty = TEXTURE_TYPE_CUBE_BOTTOM;
} else if ((0 == strncmp((*token), "cube_left", strlen("cube_left")))) {
ty = TEXTURE_TYPE_CUBE_LEFT;
} else if ((0 == strncmp((*token), "cube_right", strlen("cube_right")))) {
ty = TEXTURE_TYPE_CUBE_RIGHT;
} else if ((0 == strncmp((*token), "cube_front", strlen("cube_front")))) {
ty = TEXTURE_TYPE_CUBE_FRONT;
} else if ((0 == strncmp((*token), "cube_back", strlen("cube_back")))) {
ty = TEXTURE_TYPE_CUBE_BACK;
} else if ((0 == strncmp((*token), "sphere", strlen("sphere")))) {
ty = TEXTURE_TYPE_SPHERE;
}
(*token) = end;
return ty;
}
bool ParseTextureNameAndOption(std::string *texname, texture_option_t *texopt,
const char *linebuf) {
// @todo { write more robust lexer and parser. }
bool found_texname = false;
std::string texture_name;
const char *token = linebuf; // Assume line ends with NULL
while (!IS_NEW_LINE((*token))) {
token += strspn(token, " \t"); // skip space
if ((0 == strncmp(token, "-blendu", 7)) && IS_SPACE((token[7]))) {
token += 8;
texopt->blendu = parseOnOff(&token, /* default */ true);
} else if ((0 == strncmp(token, "-blendv", 7)) && IS_SPACE((token[7]))) {
token += 8;
texopt->blendv = parseOnOff(&token, /* default */ true);
} else if ((0 == strncmp(token, "-clamp", 6)) && IS_SPACE((token[6]))) {
token += 7;
texopt->clamp = parseOnOff(&token, /* default */ true);
} else if ((0 == strncmp(token, "-boost", 6)) && IS_SPACE((token[6]))) {
token += 7;
texopt->sharpness = parseReal(&token, 1.0);
} else if ((0 == strncmp(token, "-bm", 3)) && IS_SPACE((token[3]))) {
token += 4;
texopt->bump_multiplier = parseReal(&token, 1.0);
} else if ((0 == strncmp(token, "-o", 2)) && IS_SPACE((token[2]))) {
token += 3;
parseReal3(&(texopt->origin_offset[0]), &(texopt->origin_offset[1]),
&(texopt->origin_offset[2]), &token);
} else if ((0 == strncmp(token, "-s", 2)) && IS_SPACE((token[2]))) {
token += 3;
parseReal3(&(texopt->scale[0]), &(texopt->scale[1]), &(texopt->scale[2]),
&token, 1.0, 1.0, 1.0);
} else if ((0 == strncmp(token, "-t", 2)) && IS_SPACE((token[2]))) {
token += 3;
parseReal3(&(texopt->turbulence[0]), &(texopt->turbulence[1]),
&(texopt->turbulence[2]), &token);
} else if ((0 == strncmp(token, "-type", 5)) && IS_SPACE((token[5]))) {
token += 5;
texopt->type = parseTextureType((&token), TEXTURE_TYPE_NONE);
} else if ((0 == strncmp(token, "-texres", 7)) && IS_SPACE((token[7]))) {
token += 7;
// TODO(syoyo): Check if arg is int type.
texopt->texture_resolution = parseInt(&token);
} else if ((0 == strncmp(token, "-imfchan", 8)) && IS_SPACE((token[8]))) {
token += 9;
token += strspn(token, " \t");
const char *end = token + strcspn(token, " \t\r");
if ((end - token) == 1) { // Assume one char for -imfchan
texopt->imfchan = (*token);
}
token = end;
} else if ((0 == strncmp(token, "-mm", 3)) && IS_SPACE((token[3]))) {
token += 4;
parseReal2(&(texopt->brightness), &(texopt->contrast), &token, 0.0, 1.0);
} else if ((0 == strncmp(token, "-colorspace", 11)) &&
IS_SPACE((token[11]))) {
token += 12;
texopt->colorspace = parseString(&token);
} else {
// Assume texture filename
#if 0
size_t len = strcspn(token, " \t\r"); // untile next space
texture_name = std::string(token, token + len);
token += len;
token += strspn(token, " \t"); // skip space
#else
// Read filename until line end to parse filename containing whitespace
// TODO(syoyo): Support parsing texture option flag after the filename.
texture_name = std::string(token);
token += texture_name.length();
#endif
found_texname = true;
}
}
if (found_texname) {
(*texname) = texture_name;
return true;
} else {
return false;
}
}
static void InitTexOpt(texture_option_t *texopt, const bool is_bump) {
if (is_bump) {
texopt->imfchan = 'l';
} else {
texopt->imfchan = 'm';
}
texopt->bump_multiplier = static_cast<real_t>(1.0);
texopt->clamp = false;
texopt->blendu = true;
texopt->blendv = true;
texopt->sharpness = static_cast<real_t>(1.0);
texopt->brightness = static_cast<real_t>(0.0);
texopt->contrast = static_cast<real_t>(1.0);
texopt->origin_offset[0] = static_cast<real_t>(0.0);
texopt->origin_offset[1] = static_cast<real_t>(0.0);
texopt->origin_offset[2] = static_cast<real_t>(0.0);
texopt->scale[0] = static_cast<real_t>(1.0);
texopt->scale[1] = static_cast<real_t>(1.0);
texopt->scale[2] = static_cast<real_t>(1.0);
texopt->turbulence[0] = static_cast<real_t>(0.0);
texopt->turbulence[1] = static_cast<real_t>(0.0);
texopt->turbulence[2] = static_cast<real_t>(0.0);
texopt->texture_resolution = -1;
texopt->type = TEXTURE_TYPE_NONE;
}
static void InitMaterial(material_t *material) {
InitTexOpt(&material->ambient_texopt, /* is_bump */ false);
InitTexOpt(&material->diffuse_texopt, /* is_bump */ false);
InitTexOpt(&material->specular_texopt, /* is_bump */ false);
InitTexOpt(&material->specular_highlight_texopt, /* is_bump */ false);
InitTexOpt(&material->bump_texopt, /* is_bump */ true);
InitTexOpt(&material->displacement_texopt, /* is_bump */ false);
InitTexOpt(&material->alpha_texopt, /* is_bump */ false);
InitTexOpt(&material->reflection_texopt, /* is_bump */ false);
InitTexOpt(&material->roughness_texopt, /* is_bump */ false);
InitTexOpt(&material->metallic_texopt, /* is_bump */ false);
InitTexOpt(&material->sheen_texopt, /* is_bump */ false);
InitTexOpt(&material->emissive_texopt, /* is_bump */ false);
InitTexOpt(&material->normal_texopt,
/* is_bump */ false); // @fixme { is_bump will be true? }
material->name = "";
material->ambient_texname = "";
material->diffuse_texname = "";
material->specular_texname = "";
material->specular_highlight_texname = "";
material->bump_texname = "";
material->displacement_texname = "";
material->reflection_texname = "";
material->alpha_texname = "";
for (int i = 0; i < 3; i++) {
material->ambient[i] = static_cast<real_t>(0.0);
material->diffuse[i] = static_cast<real_t>(0.0);
material->specular[i] = static_cast<real_t>(0.0);
material->transmittance[i] = static_cast<real_t>(0.0);
material->emission[i] = static_cast<real_t>(0.0);
}
material->illum = 0;
material->dissolve = static_cast<real_t>(1.0);
material->shininess = static_cast<real_t>(1.0);
material->ior = static_cast<real_t>(1.0);
material->roughness = static_cast<real_t>(0.0);
material->metallic = static_cast<real_t>(0.0);
material->sheen = static_cast<real_t>(0.0);
material->clearcoat_thickness = static_cast<real_t>(0.0);
material->clearcoat_roughness = static_cast<real_t>(0.0);
material->anisotropy_rotation = static_cast<real_t>(0.0);
material->anisotropy = static_cast<real_t>(0.0);
material->roughness_texname = "";
material->metallic_texname = "";
material->sheen_texname = "";
material->emissive_texname = "";
material->normal_texname = "";
material->unknown_parameter.clear();
}
// code from https://wrf.ecse.rpi.edu//Research/Short_Notes/pnpoly.html
template <typename T>
static int pnpoly(int nvert, T *vertx, T *verty, T testx, T testy) {
int i, j, c = 0;
for (i = 0, j = nvert - 1; i < nvert; j = i++) {
if (((verty[i] > testy) != (verty[j] > testy)) &&
(testx <
(vertx[j] - vertx[i]) * (testy - verty[i]) / (verty[j] - verty[i]) +
vertx[i]))
c = !c;
}
return c;
}
void LoadMtl(std::map<std::string, int> *material_map,
std::vector<material_t> *materials, std::istream *inStream,
std::string *warning, std::string *err) {
(void)err;
// Create a default material anyway.
material_t material;
InitMaterial(&material);
// Issue 43. `d` wins against `Tr` since `Tr` is not in the MTL specification.
bool has_d = false;
bool has_tr = false;
// has_kd is used to set a default diffuse value when map_Kd is present
// and Kd is not.
bool has_kd = false;
std::stringstream warn_ss;
size_t line_no = 0;
std::string linebuf;
while (inStream->peek() != -1) {
safeGetline(*inStream, linebuf);
line_no++;
// Trim trailing whitespace.
if (linebuf.size() > 0) {
linebuf = linebuf.substr(0, linebuf.find_last_not_of(" \t") + 1);
}
// 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)) && IS_SPACE((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);
has_d = false;
has_tr = false;
// set new mtl name
token += 7;
{
std::stringstream sstr;
sstr << token;
material.name = sstr.str();
}
continue;
}
// ambient
if (token[0] == 'K' && token[1] == 'a' && IS_SPACE((token[2]))) {
token += 2;
real_t r, g, b;
parseReal3(&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' && IS_SPACE((token[2]))) {
token += 2;
real_t r, g, b;
parseReal3(&r, &g, &b, &token);
material.diffuse[0] = r;
material.diffuse[1] = g;
material.diffuse[2] = b;
has_kd = true;
continue;
}
// specular
if (token[0] == 'K' && token[1] == 's' && IS_SPACE((token[2]))) {
token += 2;
real_t r, g, b;
parseReal3(&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' && IS_SPACE((token[2]))) ||
(token[0] == 'T' && token[1] == 'f' && IS_SPACE((token[2])))) {
token += 2;
real_t r, g, b;
parseReal3(&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' && IS_SPACE((token[2]))) {
token += 2;
material.ior = parseReal(&token);
continue;
}
// emission
if (token[0] == 'K' && token[1] == 'e' && IS_SPACE(token[2])) {
token += 2;
real_t r, g, b;
parseReal3(&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' && IS_SPACE(token[2])) {
token += 2;
material.shininess = parseReal(&token);
continue;
}
// illum model
if (0 == strncmp(token, "illum", 5) && IS_SPACE(token[5])) {
token += 6;
material.illum = parseInt(&token);
continue;
}
// dissolve
if ((token[0] == 'd' && IS_SPACE(token[1]))) {
token += 1;
material.dissolve = parseReal(&token);
if (has_tr) {
warn_ss << "Both `d` and `Tr` parameters defined for \""
<< material.name
<< "\". Use the value of `d` for dissolve (line " << line_no
<< " in .mtl.)\n";
}
has_d = true;
continue;
}
if (token[0] == 'T' && token[1] == 'r' && IS_SPACE(token[2])) {
token += 2;
if (has_d) {
// `d` wins. Ignore `Tr` value.
warn_ss << "Both `d` and `Tr` parameters defined for \""
<< material.name
<< "\". Use the value of `d` for dissolve (line " << line_no
<< " in .mtl.)\n";
} else {
// We invert value of Tr(assume Tr is in range [0, 1])
// NOTE: Interpretation of Tr is application(exporter) dependent. For
// some application(e.g. 3ds max obj exporter), Tr = d(Issue 43)
material.dissolve = static_cast<real_t>(1.0) - parseReal(&token);
}
has_tr = true;
continue;
}
// PBR: roughness
if (token[0] == 'P' && token[1] == 'r' && IS_SPACE(token[2])) {
token += 2;
material.roughness = parseReal(&token);
continue;
}
// PBR: metallic
if (token[0] == 'P' && token[1] == 'm' && IS_SPACE(token[2])) {
token += 2;
material.metallic = parseReal(&token);
continue;
}
// PBR: sheen
if (token[0] == 'P' && token[1] == 's' && IS_SPACE(token[2])) {
token += 2;
material.sheen = parseReal(&token);
continue;
}
// PBR: clearcoat thickness
if (token[0] == 'P' && token[1] == 'c' && IS_SPACE(token[2])) {
token += 2;
material.clearcoat_thickness = parseReal(&token);
continue;
}
// PBR: clearcoat roughness
if ((0 == strncmp(token, "Pcr", 3)) && IS_SPACE(token[3])) {
token += 4;
material.clearcoat_roughness = parseReal(&token);
continue;
}
// PBR: anisotropy
if ((0 == strncmp(token, "aniso", 5)) && IS_SPACE(token[5])) {
token += 6;
material.anisotropy = parseReal(&token);
continue;
}
// PBR: anisotropy rotation
if ((0 == strncmp(token, "anisor", 6)) && IS_SPACE(token[6])) {
token += 7;
material.anisotropy_rotation = parseReal(&token);
continue;
}
// ambient texture
if ((0 == strncmp(token, "map_Ka", 6)) && IS_SPACE(token[6])) {
token += 7;
ParseTextureNameAndOption(&(material.ambient_texname),
&(material.ambient_texopt), token);
continue;
}
// diffuse texture
if ((0 == strncmp(token, "map_Kd", 6)) && IS_SPACE(token[6])) {
token += 7;
ParseTextureNameAndOption(&(material.diffuse_texname),
&(material.diffuse_texopt), token);
// Set a decent diffuse default value if a diffuse texture is specified
// without a matching Kd value.
if (!has_kd) {
material.diffuse[0] = static_cast<real_t>(0.6);
material.diffuse[1] = static_cast<real_t>(0.6);
material.diffuse[2] = static_cast<real_t>(0.6);
}
continue;
}
// specular texture
if ((0 == strncmp(token, "map_Ks", 6)) && IS_SPACE(token[6])) {
token += 7;
ParseTextureNameAndOption(&(material.specular_texname),
&(material.specular_texopt), token);
continue;
}
// specular highlight texture
if ((0 == strncmp(token, "map_Ns", 6)) && IS_SPACE(token[6])) {
token += 7;
ParseTextureNameAndOption(&(material.specular_highlight_texname),
&(material.specular_highlight_texopt), token);
continue;
}
// bump texture
if ((0 == strncmp(token, "map_bump", 8)) && IS_SPACE(token[8])) {
token += 9;
ParseTextureNameAndOption(&(material.bump_texname),
&(material.bump_texopt), token);
continue;
}
// bump texture
if ((0 == strncmp(token, "map_Bump", 8)) && IS_SPACE(token[8])) {
token += 9;
ParseTextureNameAndOption(&(material.bump_texname),
&(material.bump_texopt), token);
continue;
}
// bump texture
if ((0 == strncmp(token, "bump", 4)) && IS_SPACE(token[4])) {
token += 5;
ParseTextureNameAndOption(&(material.bump_texname),
&(material.bump_texopt), token);
continue;
}
// alpha texture
if ((0 == strncmp(token, "map_d", 5)) && IS_SPACE(token[5])) {
token += 6;
material.alpha_texname = token;
ParseTextureNameAndOption(&(material.alpha_texname),
&(material.alpha_texopt), token);
continue;
}
// displacement texture
if ((0 == strncmp(token, "disp", 4)) && IS_SPACE(token[4])) {
token += 5;
ParseTextureNameAndOption(&(material.displacement_texname),
&(material.displacement_texopt), token);
continue;
}
// reflection map
if ((0 == strncmp(token, "refl", 4)) && IS_SPACE(token[4])) {
token += 5;
ParseTextureNameAndOption(&(material.reflection_texname),
&(material.reflection_texopt), token);
continue;
}
// PBR: roughness texture
if ((0 == strncmp(token, "map_Pr", 6)) && IS_SPACE(token[6])) {
token += 7;
ParseTextureNameAndOption(&(material.roughness_texname),
&(material.roughness_texopt), token);
continue;
}
// PBR: metallic texture
if ((0 == strncmp(token, "map_Pm", 6)) && IS_SPACE(token[6])) {
token += 7;
ParseTextureNameAndOption(&(material.metallic_texname),
&(material.metallic_texopt), token);
continue;
}
// PBR: sheen texture
if ((0 == strncmp(token, "map_Ps", 6)) && IS_SPACE(token[6])) {
token += 7;
ParseTextureNameAndOption(&(material.sheen_texname),
&(material.sheen_texopt), token);
continue;
}
// PBR: emissive texture
if ((0 == strncmp(token, "map_Ke", 6)) && IS_SPACE(token[6])) {
token += 7;
ParseTextureNameAndOption(&(material.emissive_texname),
&(material.emissive_texopt), token);
continue;
}
// PBR: normal map texture
if ((0 == strncmp(token, "norm", 4)) && IS_SPACE(token[4])) {
token += 5;
ParseTextureNameAndOption(&(material.normal_texname),
&(material.normal_texopt), 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);
if (warning) {
(*warning) = warn_ss.str();
}
}
class MaterialReader {
public:
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;
};
class MaterialStreamReader : public MaterialReader {
public:
explicit MaterialStreamReader(std::istream &inStream)
: m_inStream(inStream) {}
bool operator()(const std::string &matId,
std::vector<material_t> *materials,
std::map<std::string, int> *matMap,
std::string *warn, std::string *err) {
(void)err;
(void)matId;
if (!m_inStream) {
std::stringstream ss;
ss << "Material stream in error state. \n";
if (warn) {
(*warn) += ss.str();
}
return false;
}
LoadMtl(matMap, materials, &m_inStream, warn, err);
return true;
}
private:
std::istream &m_inStream;
};