495 lines
20 KiB
C++
495 lines
20 KiB
C++
/*
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---------------------------------------------------------------------------
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Open Asset Import Library (assimp)
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---------------------------------------------------------------------------
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Copyright (c) 2006-2018, assimp team
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All rights reserved.
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Redistribution and use of this software in source and binary forms,
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with or without modification, are permitted provided that the following
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conditions are met:
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* Redistributions of source code must retain the above
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copyright notice, this list of conditions and the
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following disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the
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following disclaimer in the documentation and/or other
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materials provided with the distribution.
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* Neither the name of the assimp team, nor the names of its
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contributors may be used to endorse or promote products
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derived from this software without specific prior
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written permission of the assimp team.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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---------------------------------------------------------------------------
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*/
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#ifndef ASSIMP_BUILD_NO_OBJ_IMPORTER
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#include <stdlib.h>
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#include "ObjFileMtlImporter.h"
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#include "ObjTools.h"
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#include "ObjFileData.h"
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#include <assimp/fast_atof.h>
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#include <assimp/ParsingUtils.h>
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#include <assimp/material.h>
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#include <assimp/DefaultLogger.hpp>
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namespace Assimp {
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// Material specific token (case insensitive compare)
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static const std::string DiffuseTexture = "map_Kd";
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static const std::string AmbientTexture = "map_Ka";
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static const std::string SpecularTexture = "map_Ks";
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static const std::string OpacityTexture = "map_d";
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static const std::string EmissiveTexture1 = "map_emissive";
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static const std::string EmissiveTexture2 = "map_Ke";
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static const std::string BumpTexture1 = "map_bump";
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static const std::string BumpTexture2 = "bump";
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static const std::string NormalTexture = "map_Kn";
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static const std::string ReflectionTexture = "refl";
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static const std::string DisplacementTexture1 = "map_disp";
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static const std::string DisplacementTexture2 = "disp";
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static const std::string SpecularityTexture = "map_ns";
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// texture option specific token
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static const std::string BlendUOption = "-blendu";
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static const std::string BlendVOption = "-blendv";
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static const std::string BoostOption = "-boost";
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static const std::string ModifyMapOption = "-mm";
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static const std::string OffsetOption = "-o";
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static const std::string ScaleOption = "-s";
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static const std::string TurbulenceOption = "-t";
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static const std::string ResolutionOption = "-texres";
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static const std::string ClampOption = "-clamp";
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static const std::string BumpOption = "-bm";
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static const std::string ChannelOption = "-imfchan";
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static const std::string TypeOption = "-type";
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// -------------------------------------------------------------------
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// Constructor
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ObjFileMtlImporter::ObjFileMtlImporter( std::vector<char> &buffer,
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const std::string &,
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ObjFile::Model *pModel ) :
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m_DataIt( buffer.begin() ),
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m_DataItEnd( buffer.end() ),
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m_pModel( pModel ),
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m_uiLine( 0 )
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{
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ai_assert( NULL != m_pModel );
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if ( NULL == m_pModel->m_pDefaultMaterial )
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{
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m_pModel->m_pDefaultMaterial = new ObjFile::Material;
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m_pModel->m_pDefaultMaterial->MaterialName.Set( "default" );
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}
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load();
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}
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// -------------------------------------------------------------------
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// Destructor
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ObjFileMtlImporter::~ObjFileMtlImporter()
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{
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// empty
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}
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// -------------------------------------------------------------------
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// Private copy constructor
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ObjFileMtlImporter::ObjFileMtlImporter(const ObjFileMtlImporter & )
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{
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// empty
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}
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// -------------------------------------------------------------------
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// Private copy constructor
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ObjFileMtlImporter &ObjFileMtlImporter::operator = ( const ObjFileMtlImporter & )
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{
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return *this;
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}
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// -------------------------------------------------------------------
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// Loads the material description
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void ObjFileMtlImporter::load()
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{
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if ( m_DataIt == m_DataItEnd )
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return;
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while ( m_DataIt != m_DataItEnd )
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{
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switch (*m_DataIt)
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{
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case 'k':
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case 'K':
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{
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++m_DataIt;
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if (*m_DataIt == 'a') // Ambient color
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{
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++m_DataIt;
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getColorRGBA( &m_pModel->m_pCurrentMaterial->ambient );
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}
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else if (*m_DataIt == 'd') // Diffuse color
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{
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++m_DataIt;
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getColorRGBA( &m_pModel->m_pCurrentMaterial->diffuse );
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}
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else if (*m_DataIt == 's')
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{
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++m_DataIt;
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getColorRGBA( &m_pModel->m_pCurrentMaterial->specular );
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}
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else if (*m_DataIt == 'e')
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{
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++m_DataIt;
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getColorRGBA( &m_pModel->m_pCurrentMaterial->emissive );
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}
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m_DataIt = skipLine<DataArrayIt>( m_DataIt, m_DataItEnd, m_uiLine );
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}
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break;
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case 'T':
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{
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++m_DataIt;
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if (*m_DataIt == 'f') // Material transmission
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{
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++m_DataIt;
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getColorRGBA( &m_pModel->m_pCurrentMaterial->transparent);
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}
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m_DataIt = skipLine<DataArrayIt>( m_DataIt, m_DataItEnd, m_uiLine );
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}
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break;
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case 'd':
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{
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if( *(m_DataIt+1) == 'i' && *( m_DataIt + 2 ) == 's' && *( m_DataIt + 3 ) == 'p' ) {
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// A displacement map
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getTexture();
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} else {
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// Alpha value
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++m_DataIt;
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getFloatValue( m_pModel->m_pCurrentMaterial->alpha );
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m_DataIt = skipLine<DataArrayIt>( m_DataIt, m_DataItEnd, m_uiLine );
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}
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}
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break;
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case 'N':
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case 'n':
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{
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++m_DataIt;
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switch(*m_DataIt)
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{
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case 's': // Specular exponent
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++m_DataIt;
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getFloatValue(m_pModel->m_pCurrentMaterial->shineness);
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break;
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case 'i': // Index Of refraction
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++m_DataIt;
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getFloatValue(m_pModel->m_pCurrentMaterial->ior);
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break;
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case 'e': // New material
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createMaterial();
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break;
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}
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m_DataIt = skipLine<DataArrayIt>( m_DataIt, m_DataItEnd, m_uiLine );
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}
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break;
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case 'm': // Texture
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case 'b': // quick'n'dirty - for 'bump' sections
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case 'r': // quick'n'dirty - for 'refl' sections
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{
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getTexture();
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m_DataIt = skipLine<DataArrayIt>( m_DataIt, m_DataItEnd, m_uiLine );
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}
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break;
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case 'i': // Illumination model
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{
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m_DataIt = getNextToken<DataArrayIt>(m_DataIt, m_DataItEnd);
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getIlluminationModel( m_pModel->m_pCurrentMaterial->illumination_model );
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m_DataIt = skipLine<DataArrayIt>( m_DataIt, m_DataItEnd, m_uiLine );
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}
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break;
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default:
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{
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m_DataIt = skipLine<DataArrayIt>( m_DataIt, m_DataItEnd, m_uiLine );
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}
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break;
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}
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}
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}
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// -------------------------------------------------------------------
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// Loads a color definition
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void ObjFileMtlImporter::getColorRGBA( aiColor3D *pColor )
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{
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ai_assert( NULL != pColor );
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ai_real r( 0.0 ), g( 0.0 ), b( 0.0 );
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m_DataIt = getFloat<DataArrayIt>( m_DataIt, m_DataItEnd, r );
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pColor->r = r;
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// we have to check if color is default 0 with only one token
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if( !IsLineEnd( *m_DataIt ) ) {
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m_DataIt = getFloat<DataArrayIt>( m_DataIt, m_DataItEnd, g );
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m_DataIt = getFloat<DataArrayIt>( m_DataIt, m_DataItEnd, b );
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}
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pColor->g = g;
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pColor->b = b;
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}
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// -------------------------------------------------------------------
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// Loads the kind of illumination model.
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void ObjFileMtlImporter::getIlluminationModel( int &illum_model )
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{
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m_DataIt = CopyNextWord<DataArrayIt>( m_DataIt, m_DataItEnd, m_buffer, BUFFERSIZE );
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illum_model = atoi(m_buffer);
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}
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// -------------------------------------------------------------------
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// Loads a single float value.
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void ObjFileMtlImporter::getFloatValue( ai_real &value )
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{
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m_DataIt = CopyNextWord<DataArrayIt>( m_DataIt, m_DataItEnd, m_buffer, BUFFERSIZE );
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value = (ai_real) fast_atof(m_buffer);
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}
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// -------------------------------------------------------------------
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// Creates a material from loaded data.
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void ObjFileMtlImporter::createMaterial()
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{
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std::string line( "" );
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while( !IsLineEnd( *m_DataIt ) ) {
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line += *m_DataIt;
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++m_DataIt;
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}
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std::vector<std::string> token;
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const unsigned int numToken = tokenize<std::string>( line, token, " \t" );
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std::string name( "" );
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if ( numToken == 1 ) {
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name = AI_DEFAULT_MATERIAL_NAME;
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} else {
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// skip newmtl and all following white spaces
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std::size_t first_ws_pos = line.find_first_of(" \t");
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std::size_t first_non_ws_pos = line.find_first_not_of(" \t", first_ws_pos);
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if (first_non_ws_pos != std::string::npos) {
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name = line.substr(first_non_ws_pos);
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}
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}
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name = trim_whitespaces(name);
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std::map<std::string, ObjFile::Material*>::iterator it = m_pModel->m_MaterialMap.find( name );
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if ( m_pModel->m_MaterialMap.end() == it) {
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// New Material created
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m_pModel->m_pCurrentMaterial = new ObjFile::Material();
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m_pModel->m_pCurrentMaterial->MaterialName.Set( name );
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m_pModel->m_MaterialLib.push_back( name );
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m_pModel->m_MaterialMap[ name ] = m_pModel->m_pCurrentMaterial;
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if (m_pModel->m_pCurrentMesh) {
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m_pModel->m_pCurrentMesh->m_uiMaterialIndex = static_cast<unsigned int>(m_pModel->m_MaterialLib.size() - 1);
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}
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} else {
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// Use older material
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m_pModel->m_pCurrentMaterial = (*it).second;
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}
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}
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// -------------------------------------------------------------------
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// Gets a texture name from data.
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void ObjFileMtlImporter::getTexture() {
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aiString *out( NULL );
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int clampIndex = -1;
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const char *pPtr( &(*m_DataIt) );
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if ( !ASSIMP_strincmp( pPtr, DiffuseTexture.c_str(), static_cast<unsigned int>(DiffuseTexture.size()) ) ) {
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// Diffuse texture
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out = & m_pModel->m_pCurrentMaterial->texture;
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clampIndex = ObjFile::Material::TextureDiffuseType;
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} else if ( !ASSIMP_strincmp( pPtr,AmbientTexture.c_str(), static_cast<unsigned int>(AmbientTexture.size()) ) ) {
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// Ambient texture
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out = & m_pModel->m_pCurrentMaterial->textureAmbient;
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clampIndex = ObjFile::Material::TextureAmbientType;
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} else if ( !ASSIMP_strincmp( pPtr, SpecularTexture.c_str(), static_cast<unsigned int>(SpecularTexture.size()) ) ) {
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// Specular texture
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out = & m_pModel->m_pCurrentMaterial->textureSpecular;
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clampIndex = ObjFile::Material::TextureSpecularType;
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} else if ( !ASSIMP_strincmp( pPtr, OpacityTexture.c_str(), static_cast<unsigned int>(OpacityTexture.size()) ) ) {
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// Opacity texture
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out = & m_pModel->m_pCurrentMaterial->textureOpacity;
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clampIndex = ObjFile::Material::TextureOpacityType;
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} else if ( !ASSIMP_strincmp( pPtr, EmissiveTexture1.c_str(), static_cast<unsigned int>(EmissiveTexture1.size()) ) ||
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!ASSIMP_strincmp( pPtr, EmissiveTexture2.c_str(), static_cast<unsigned int>(EmissiveTexture2.size()) ) ) {
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// Emissive texture
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out = & m_pModel->m_pCurrentMaterial->textureEmissive;
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clampIndex = ObjFile::Material::TextureEmissiveType;
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} else if ( !ASSIMP_strincmp( pPtr, BumpTexture1.c_str(), static_cast<unsigned int>(BumpTexture1.size()) ) ||
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!ASSIMP_strincmp( pPtr, BumpTexture2.c_str(), static_cast<unsigned int>(BumpTexture2.size()) ) ) {
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// Bump texture
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out = & m_pModel->m_pCurrentMaterial->textureBump;
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clampIndex = ObjFile::Material::TextureBumpType;
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} else if ( !ASSIMP_strincmp( pPtr,NormalTexture.c_str(), static_cast<unsigned int>(NormalTexture.size()) ) ) {
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// Normal map
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out = & m_pModel->m_pCurrentMaterial->textureNormal;
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clampIndex = ObjFile::Material::TextureNormalType;
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} else if( !ASSIMP_strincmp( pPtr, ReflectionTexture.c_str(), static_cast<unsigned int>(ReflectionTexture.size()) ) ) {
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// Reflection texture(s)
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//Do nothing here
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return;
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} else if ( !ASSIMP_strincmp( pPtr, DisplacementTexture1.c_str(), static_cast<unsigned int>(DisplacementTexture1.size()) ) ||
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!ASSIMP_strincmp( pPtr, DisplacementTexture2.c_str(), static_cast<unsigned int>(DisplacementTexture2.size()) ) ) {
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// Displacement texture
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out = &m_pModel->m_pCurrentMaterial->textureDisp;
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clampIndex = ObjFile::Material::TextureDispType;
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} else if ( !ASSIMP_strincmp( pPtr, SpecularityTexture.c_str(), static_cast<unsigned int>(SpecularityTexture.size()) ) ) {
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// Specularity scaling (glossiness)
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out = & m_pModel->m_pCurrentMaterial->textureSpecularity;
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clampIndex = ObjFile::Material::TextureSpecularityType;
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} else {
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ASSIMP_LOG_ERROR("OBJ/MTL: Encountered unknown texture type");
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return;
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}
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bool clamp = false;
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getTextureOption(clamp, clampIndex, out);
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m_pModel->m_pCurrentMaterial->clamp[clampIndex] = clamp;
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std::string texture;
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m_DataIt = getName<DataArrayIt>( m_DataIt, m_DataItEnd, texture );
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if ( NULL!=out ) {
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out->Set( texture );
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}
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}
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/* /////////////////////////////////////////////////////////////////////////////
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* Texture Option
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* /////////////////////////////////////////////////////////////////////////////
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* According to http://en.wikipedia.org/wiki/Wavefront_.obj_file#Texture_options
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* Texture map statement can contains various texture option, for example:
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*
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* map_Ka -o 1 1 1 some.png
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* map_Kd -clamp on some.png
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*
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* So we need to parse and skip these options, and leave the last part which is
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* the url of image, otherwise we will get a wrong url like "-clamp on some.png".
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*
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* Because aiMaterial supports clamp option, so we also want to return it
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* /////////////////////////////////////////////////////////////////////////////
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*/
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void ObjFileMtlImporter::getTextureOption(bool &clamp, int &clampIndex, aiString *&out) {
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m_DataIt = getNextToken<DataArrayIt>(m_DataIt, m_DataItEnd);
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// If there is any more texture option
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while (!isEndOfBuffer(m_DataIt, m_DataItEnd) && *m_DataIt == '-')
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{
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const char *pPtr( &(*m_DataIt) );
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//skip option key and value
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int skipToken = 1;
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if (!ASSIMP_strincmp(pPtr, ClampOption.c_str(), static_cast<unsigned int>(ClampOption.size())))
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{
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DataArrayIt it = getNextToken<DataArrayIt>(m_DataIt, m_DataItEnd);
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char value[3];
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CopyNextWord(it, m_DataItEnd, value, sizeof(value) / sizeof(*value));
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if (!ASSIMP_strincmp(value, "on", 2))
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{
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clamp = true;
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}
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skipToken = 2;
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}
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else if( !ASSIMP_strincmp( pPtr, TypeOption.c_str(), static_cast<unsigned int>(TypeOption.size()) ) )
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{
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DataArrayIt it = getNextToken<DataArrayIt>( m_DataIt, m_DataItEnd );
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char value[ 12 ];
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CopyNextWord( it, m_DataItEnd, value, sizeof( value ) / sizeof( *value ) );
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if( !ASSIMP_strincmp( value, "cube_top", 8 ) )
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{
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clampIndex = ObjFile::Material::TextureReflectionCubeTopType;
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out = &m_pModel->m_pCurrentMaterial->textureReflection[0];
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}
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else if( !ASSIMP_strincmp( value, "cube_bottom", 11 ) )
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{
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clampIndex = ObjFile::Material::TextureReflectionCubeBottomType;
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out = &m_pModel->m_pCurrentMaterial->textureReflection[1];
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}
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else if( !ASSIMP_strincmp( value, "cube_front", 10 ) )
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{
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clampIndex = ObjFile::Material::TextureReflectionCubeFrontType;
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out = &m_pModel->m_pCurrentMaterial->textureReflection[2];
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}
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else if( !ASSIMP_strincmp( value, "cube_back", 9 ) )
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{
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clampIndex = ObjFile::Material::TextureReflectionCubeBackType;
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out = &m_pModel->m_pCurrentMaterial->textureReflection[3];
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}
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else if( !ASSIMP_strincmp( value, "cube_left", 9 ) )
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{
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clampIndex = ObjFile::Material::TextureReflectionCubeLeftType;
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out = &m_pModel->m_pCurrentMaterial->textureReflection[4];
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}
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else if( !ASSIMP_strincmp( value, "cube_right", 10 ) )
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{
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clampIndex = ObjFile::Material::TextureReflectionCubeRightType;
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out = &m_pModel->m_pCurrentMaterial->textureReflection[5];
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}
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else if( !ASSIMP_strincmp( value, "sphere", 6 ) )
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{
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clampIndex = ObjFile::Material::TextureReflectionSphereType;
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out = &m_pModel->m_pCurrentMaterial->textureReflection[0];
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}
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skipToken = 2;
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}
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else if (!ASSIMP_strincmp(pPtr, BlendUOption.c_str(), static_cast<unsigned int>(BlendUOption.size()))
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|| !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
|