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assimp/code/Obj/ObjFileMtlImporter.cpp

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/*
---------------------------------------------------------------------------
Open Asset Import Library (assimp)
---------------------------------------------------------------------------
Copyright (c) 2006-2020, assimp team
All rights reserved.
Redistribution and use of this software in source and binary forms,
with or without modification, are permitted provided that the following
conditions are met:
* Redistributions of source code must retain the above
copyright notice, this list of conditions and the
following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the
following disclaimer in the documentation and/or other
materials provided with the distribution.
* Neither the name of the assimp team, nor the names of its
contributors may be used to endorse or promote products
derived from this software without specific prior
written permission of the assimp team.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
---------------------------------------------------------------------------
*/
#ifndef ASSIMP_BUILD_NO_OBJ_IMPORTER
#include "ObjFileMtlImporter.h"
#include "ObjFileData.h"
#include "ObjTools.h"
#include <assimp/ParsingUtils.h>
#include <assimp/fast_atof.h>
#include <assimp/material.h>
#include <stdlib.h>
#include <assimp/DefaultLogger.hpp>
namespace Assimp {
// Material specific token (case insensitive compare)
static const std::string DiffuseTexture = "map_Kd";
static const std::string AmbientTexture = "map_Ka";
static const std::string SpecularTexture = "map_Ks";
static const std::string OpacityTexture = "map_d";
static const std::string EmissiveTexture1 = "map_emissive";
static const std::string EmissiveTexture2 = "map_Ke";
static const std::string BumpTexture1 = "map_bump";
static const std::string BumpTexture2 = "bump";
static const std::string NormalTexture = "map_Kn";
static const std::string ReflectionTexture = "refl";
static const std::string DisplacementTexture1 = "map_disp";
static const std::string DisplacementTexture2 = "disp";
static const std::string SpecularityTexture = "map_ns";
// texture option specific token
static const std::string BlendUOption = "-blendu";
static const std::string BlendVOption = "-blendv";
static const std::string BoostOption = "-boost";
static const std::string ModifyMapOption = "-mm";
static const std::string OffsetOption = "-o";
static const std::string ScaleOption = "-s";
static const std::string TurbulenceOption = "-t";
static const std::string ResolutionOption = "-texres";
static const std::string ClampOption = "-clamp";
static const std::string BumpOption = "-bm";
static const std::string ChannelOption = "-imfchan";
static const std::string TypeOption = "-type";
// -------------------------------------------------------------------
// Constructor
ObjFileMtlImporter::ObjFileMtlImporter(std::vector<char> &buffer,
const std::string &,
ObjFile::Model *pModel) :
m_DataIt(buffer.begin()),
m_DataItEnd(buffer.end()),
m_pModel(pModel),
m_uiLine(0),
m_buffer() {
ai_assert(nullptr != m_pModel);
m_buffer.resize(BUFFERSIZE);
std::fill(m_buffer.begin(), m_buffer.end(), '\0');
if (nullptr == m_pModel->m_pDefaultMaterial) {
m_pModel->m_pDefaultMaterial = new ObjFile::Material;
m_pModel->m_pDefaultMaterial->MaterialName.Set("default");
}
load();
}
// -------------------------------------------------------------------
// Destructor
ObjFileMtlImporter::~ObjFileMtlImporter() {
// empty
}
// -------------------------------------------------------------------
// Loads the material description
void ObjFileMtlImporter::load() {
if (m_DataIt == m_DataItEnd)
return;
while (m_DataIt != m_DataItEnd) {
switch (*m_DataIt) {
case 'k':
case 'K': {
++m_DataIt;
if (*m_DataIt == 'a') // Ambient color
{
++m_DataIt;
getColorRGBA(&m_pModel->m_pCurrentMaterial->ambient);
} else if (*m_DataIt == 'd') // Diffuse color
{
++m_DataIt;
getColorRGBA(&m_pModel->m_pCurrentMaterial->diffuse);
} else if (*m_DataIt == 's') {
++m_DataIt;
getColorRGBA(&m_pModel->m_pCurrentMaterial->specular);
} else if (*m_DataIt == 'e') {
++m_DataIt;
getColorRGBA(&m_pModel->m_pCurrentMaterial->emissive);
}
m_DataIt = skipLine<DataArrayIt>(m_DataIt, m_DataItEnd, m_uiLine);
} break;
case 'T': {
++m_DataIt;
if (*m_DataIt == 'f') // Material transmission
{
++m_DataIt;
getColorRGBA(&m_pModel->m_pCurrentMaterial->transparent);
}
m_DataIt = skipLine<DataArrayIt>(m_DataIt, m_DataItEnd, m_uiLine);
} break;
case 'd': {
if (*(m_DataIt + 1) == 'i' && *(m_DataIt + 2) == 's' && *(m_DataIt + 3) == 'p') {
// A displacement map
getTexture();
} else {
// Alpha value
++m_DataIt;
getFloatValue(m_pModel->m_pCurrentMaterial->alpha);
m_DataIt = skipLine<DataArrayIt>(m_DataIt, m_DataItEnd, m_uiLine);
}
} break;
case 'N':
case 'n': {
++m_DataIt;
switch (*m_DataIt) {
case 's': // Specular exponent
++m_DataIt;
getFloatValue(m_pModel->m_pCurrentMaterial->shineness);
break;
case 'i': // Index Of refraction
++m_DataIt;
getFloatValue(m_pModel->m_pCurrentMaterial->ior);
break;
case 'e': // New material
createMaterial();
break;
}
m_DataIt = skipLine<DataArrayIt>(m_DataIt, m_DataItEnd, m_uiLine);
} break;
case 'm': // Texture
case 'b': // quick'n'dirty - for 'bump' sections
case 'r': // quick'n'dirty - for 'refl' sections
{
getTexture();
m_DataIt = skipLine<DataArrayIt>(m_DataIt, m_DataItEnd, m_uiLine);
} break;
case 'i': // Illumination model
{
m_DataIt = getNextToken<DataArrayIt>(m_DataIt, m_DataItEnd);
getIlluminationModel(m_pModel->m_pCurrentMaterial->illumination_model);
m_DataIt = skipLine<DataArrayIt>(m_DataIt, m_DataItEnd, m_uiLine);
} break;
default: {
m_DataIt = skipLine<DataArrayIt>(m_DataIt, m_DataItEnd, m_uiLine);
} break;
}
}
}
// -------------------------------------------------------------------
// Loads a color definition
void ObjFileMtlImporter::getColorRGBA(aiColor3D *pColor) {
ai_assert(NULL != pColor);
ai_real r(0.0), g(0.0), b(0.0);
m_DataIt = getFloat<DataArrayIt>(m_DataIt, m_DataItEnd, r);
pColor->r = r;
// we have to check if color is default 0 with only one token
if (!IsLineEnd(*m_DataIt)) {
m_DataIt = getFloat<DataArrayIt>(m_DataIt, m_DataItEnd, g);
m_DataIt = getFloat<DataArrayIt>(m_DataIt, m_DataItEnd, b);
}
pColor->g = g;
pColor->b = b;
}
// -------------------------------------------------------------------
// Loads the kind of illumination model.
void ObjFileMtlImporter::getIlluminationModel(int &illum_model) {
m_DataIt = CopyNextWord<DataArrayIt>(m_DataIt, m_DataItEnd, &m_buffer[0], BUFFERSIZE);
illum_model = atoi(&m_buffer[0]);
}
// -------------------------------------------------------------------
// Loads a single float value.
void ObjFileMtlImporter::getFloatValue(ai_real &value) {
m_DataIt = CopyNextWord<DataArrayIt>(m_DataIt, m_DataItEnd, &m_buffer[0], BUFFERSIZE);
value = (ai_real)fast_atof(&m_buffer[0]);
}
// -------------------------------------------------------------------
// Creates a material from loaded data.
void ObjFileMtlImporter::createMaterial() {
std::string line;
while (!IsLineEnd(*m_DataIt)) {
line += *m_DataIt;
++m_DataIt;
}
std::vector<std::string> token;
const unsigned int numToken = tokenize<std::string>(line, token, " \t");
std::string name;
if (numToken == 1) {
name = AI_DEFAULT_MATERIAL_NAME;
} else {
// skip newmtl and all following white spaces
std::size_t first_ws_pos = line.find_first_of(" \t");
std::size_t first_non_ws_pos = line.find_first_not_of(" \t", first_ws_pos);
if (first_non_ws_pos != std::string::npos) {
name = line.substr(first_non_ws_pos);
}
}
name = trim_whitespaces(name);
std::map<std::string, ObjFile::Material *>::iterator it = m_pModel->m_MaterialMap.find(name);
if (m_pModel->m_MaterialMap.end() == it) {
// New Material created
m_pModel->m_pCurrentMaterial = new ObjFile::Material();
m_pModel->m_pCurrentMaterial->MaterialName.Set(name);
m_pModel->m_MaterialLib.push_back(name);
m_pModel->m_MaterialMap[name] = m_pModel->m_pCurrentMaterial;
if (m_pModel->m_pCurrentMesh) {
m_pModel->m_pCurrentMesh->m_uiMaterialIndex = static_cast<unsigned int>(m_pModel->m_MaterialLib.size() - 1);
}
} else {
// Use older material
m_pModel->m_pCurrentMaterial = (*it).second;
}
}
// -------------------------------------------------------------------
// Gets a texture name from data.
void ObjFileMtlImporter::getTexture() {
aiString *out(NULL);
int clampIndex = -1;
const char *pPtr(&(*m_DataIt));
if (!ASSIMP_strincmp(pPtr, DiffuseTexture.c_str(), static_cast<unsigned int>(DiffuseTexture.size()))) {
// Diffuse texture
out = &m_pModel->m_pCurrentMaterial->texture;
clampIndex = ObjFile::Material::TextureDiffuseType;
} else if (!ASSIMP_strincmp(pPtr, AmbientTexture.c_str(), static_cast<unsigned int>(AmbientTexture.size()))) {
// Ambient texture
out = &m_pModel->m_pCurrentMaterial->textureAmbient;
clampIndex = ObjFile::Material::TextureAmbientType;
} else if (!ASSIMP_strincmp(pPtr, SpecularTexture.c_str(), static_cast<unsigned int>(SpecularTexture.size()))) {
// Specular texture
out = &m_pModel->m_pCurrentMaterial->textureSpecular;
clampIndex = ObjFile::Material::TextureSpecularType;
} else if (!ASSIMP_strincmp(pPtr, DisplacementTexture1.c_str(), static_cast<unsigned int>(DisplacementTexture1.size())) ||
!ASSIMP_strincmp(pPtr, DisplacementTexture2.c_str(), static_cast<unsigned int>(DisplacementTexture2.size()))) {
// Displacement texture
out = &m_pModel->m_pCurrentMaterial->textureDisp;
clampIndex = ObjFile::Material::TextureDispType;
} else if (!ASSIMP_strincmp(pPtr, OpacityTexture.c_str(), static_cast<unsigned int>(OpacityTexture.size()))) {
// Opacity texture
out = &m_pModel->m_pCurrentMaterial->textureOpacity;
clampIndex = ObjFile::Material::TextureOpacityType;
} else if (!ASSIMP_strincmp(pPtr, EmissiveTexture1.c_str(), static_cast<unsigned int>(EmissiveTexture1.size())) ||
!ASSIMP_strincmp(pPtr, EmissiveTexture2.c_str(), static_cast<unsigned int>(EmissiveTexture2.size()))) {
// Emissive texture
out = &m_pModel->m_pCurrentMaterial->textureEmissive;
clampIndex = ObjFile::Material::TextureEmissiveType;
} else if (!ASSIMP_strincmp(pPtr, BumpTexture1.c_str(), static_cast<unsigned int>(BumpTexture1.size())) ||
!ASSIMP_strincmp(pPtr, BumpTexture2.c_str(), static_cast<unsigned int>(BumpTexture2.size()))) {
// Bump texture
out = &m_pModel->m_pCurrentMaterial->textureBump;
clampIndex = ObjFile::Material::TextureBumpType;
} else if (!ASSIMP_strincmp(pPtr, NormalTexture.c_str(), static_cast<unsigned int>(NormalTexture.size()))) {
// Normal map
out = &m_pModel->m_pCurrentMaterial->textureNormal;
clampIndex = ObjFile::Material::TextureNormalType;
} else if (!ASSIMP_strincmp(pPtr, ReflectionTexture.c_str(), static_cast<unsigned int>(ReflectionTexture.size()))) {
// Reflection texture(s)
//Do nothing here
return;
} else if (!ASSIMP_strincmp(pPtr, SpecularityTexture.c_str(), static_cast<unsigned int>(SpecularityTexture.size()))) {
// Specularity scaling (glossiness)
out = &m_pModel->m_pCurrentMaterial->textureSpecularity;
clampIndex = ObjFile::Material::TextureSpecularityType;
} else {
ASSIMP_LOG_ERROR("OBJ/MTL: Encountered unknown texture type");
return;
}
bool clamp = false;
getTextureOption(clamp, clampIndex, out);
m_pModel->m_pCurrentMaterial->clamp[clampIndex] = clamp;
std::string texture;
m_DataIt = getName<DataArrayIt>(m_DataIt, m_DataItEnd, texture);
if (NULL != out) {
out->Set(texture);
}
}
/* /////////////////////////////////////////////////////////////////////////////
* Texture Option
* /////////////////////////////////////////////////////////////////////////////
* According to http://en.wikipedia.org/wiki/Wavefront_.obj_file#Texture_options
* Texture map statement can contains various texture option, for example:
*
* map_Ka -o 1 1 1 some.png
* map_Kd -clamp on some.png
*
* So we need to parse and skip these options, and leave the last part which is
* the url of image, otherwise we will get a wrong url like "-clamp on some.png".
*
* Because aiMaterial supports clamp option, so we also want to return it
* /////////////////////////////////////////////////////////////////////////////
*/
void ObjFileMtlImporter::getTextureOption(bool &clamp, int &clampIndex, aiString *&out) {
m_DataIt = getNextToken<DataArrayIt>(m_DataIt, m_DataItEnd);
// If there is any more texture option
while (!isEndOfBuffer(m_DataIt, m_DataItEnd) && *m_DataIt == '-') {
const char *pPtr(&(*m_DataIt));
//skip option key and value
int skipToken = 1;
if (!ASSIMP_strincmp(pPtr, ClampOption.c_str(), static_cast<unsigned int>(ClampOption.size()))) {
DataArrayIt it = getNextToken<DataArrayIt>(m_DataIt, m_DataItEnd);
char value[3];
CopyNextWord(it, m_DataItEnd, value, sizeof(value) / sizeof(*value));
if (!ASSIMP_strincmp(value, "on", 2)) {
clamp = true;
}
skipToken = 2;
} else if (!ASSIMP_strincmp(pPtr, TypeOption.c_str(), static_cast<unsigned int>(TypeOption.size()))) {
DataArrayIt it = getNextToken<DataArrayIt>(m_DataIt, m_DataItEnd);
char value[12];
CopyNextWord(it, m_DataItEnd, value, sizeof(value) / sizeof(*value));
if (!ASSIMP_strincmp(value, "cube_top", 8)) {
clampIndex = ObjFile::Material::TextureReflectionCubeTopType;
out = &m_pModel->m_pCurrentMaterial->textureReflection[0];
} else if (!ASSIMP_strincmp(value, "cube_bottom", 11)) {
clampIndex = ObjFile::Material::TextureReflectionCubeBottomType;
out = &m_pModel->m_pCurrentMaterial->textureReflection[1];
} else if (!ASSIMP_strincmp(value, "cube_front", 10)) {
clampIndex = ObjFile::Material::TextureReflectionCubeFrontType;
out = &m_pModel->m_pCurrentMaterial->textureReflection[2];
} else if (!ASSIMP_strincmp(value, "cube_back", 9)) {
clampIndex = ObjFile::Material::TextureReflectionCubeBackType;
out = &m_pModel->m_pCurrentMaterial->textureReflection[3];
} else if (!ASSIMP_strincmp(value, "cube_left", 9)) {
clampIndex = ObjFile::Material::TextureReflectionCubeLeftType;
out = &m_pModel->m_pCurrentMaterial->textureReflection[4];
} else if (!ASSIMP_strincmp(value, "cube_right", 10)) {
clampIndex = ObjFile::Material::TextureReflectionCubeRightType;
out = &m_pModel->m_pCurrentMaterial->textureReflection[5];
} else if (!ASSIMP_strincmp(value, "sphere", 6)) {
clampIndex = ObjFile::Material::TextureReflectionSphereType;
out = &m_pModel->m_pCurrentMaterial->textureReflection[0];
}
skipToken = 2;
} else if (!ASSIMP_strincmp(pPtr, BlendUOption.c_str(), static_cast<unsigned int>(BlendUOption.size())) || !ASSIMP_strincmp(pPtr, BlendVOption.c_str(), static_cast<unsigned int>(BlendVOption.size())) || !ASSIMP_strincmp(pPtr, BoostOption.c_str(), static_cast<unsigned int>(BoostOption.size())) || !ASSIMP_strincmp(pPtr, ResolutionOption.c_str(), static_cast<unsigned int>(ResolutionOption.size())) || !ASSIMP_strincmp(pPtr, BumpOption.c_str(), static_cast<unsigned int>(BumpOption.size())) || !ASSIMP_strincmp(pPtr, ChannelOption.c_str(), static_cast<unsigned int>(ChannelOption.size()))) {
skipToken = 2;
} else if (!ASSIMP_strincmp(pPtr, ModifyMapOption.c_str(), static_cast<unsigned int>(ModifyMapOption.size()))) {
skipToken = 3;
} else if (!ASSIMP_strincmp(pPtr, OffsetOption.c_str(), static_cast<unsigned int>(OffsetOption.size())) || !ASSIMP_strincmp(pPtr, ScaleOption.c_str(), static_cast<unsigned int>(ScaleOption.size())) || !ASSIMP_strincmp(pPtr, TurbulenceOption.c_str(), static_cast<unsigned int>(TurbulenceOption.size()))) {
skipToken = 4;
}
for (int i = 0; i < skipToken; ++i) {
m_DataIt = getNextToken<DataArrayIt>(m_DataIt, m_DataItEnd);
}
}
}
// -------------------------------------------------------------------
} // Namespace Assimp
#endif // !! ASSIMP_BUILD_NO_OBJ_IMPORTER
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