241 lines
9.2 KiB
C++
241 lines
9.2 KiB
C++
#include "fbxMaterialToOsgStateSet.h"
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#include <sstream>
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#include <osgDB/ReadFile>
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#include <osgDB/FileUtils>
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#include <osgDB/FileNameUtils>
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static osg::Texture::WrapMode convertWrap(KFbxFileTexture::EWrapMode wrap)
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{
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return wrap == KFbxFileTexture::eREPEAT ?
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osg::Texture2D::REPEAT : osg::Texture2D::CLAMP_TO_EDGE;
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}
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StateSetContent
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FbxMaterialToOsgStateSet::convert(const KFbxSurfaceMaterial* pFbxMat)
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{
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FbxMaterialMap::const_iterator it = _fbxMaterialMap.find(pFbxMat);
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if (it != _fbxMaterialMap.end())
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return it->second;
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osg::ref_ptr<osg::Material> pOsgMat = new osg::Material;
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pOsgMat->setName(pFbxMat->GetName());
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StateSetContent result;
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result.material = pOsgMat;
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fbxString shadingModel = pFbxMat->ShadingModel.Get();
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const KFbxSurfaceLambert* pFbxLambert = KFbxCast<KFbxSurfaceLambert>(pFbxMat);
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// diffuse map...
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const KFbxProperty lProperty = pFbxMat->FindProperty(KFbxSurfaceMaterial::sDiffuse);
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if (lProperty.IsValid())
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{
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int lNbTex = lProperty.GetSrcObjectCount(KFbxFileTexture::ClassId);
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for (int lTextureIndex = 0; lTextureIndex < lNbTex; lTextureIndex++)
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{
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KFbxFileTexture* lTexture = KFbxCast<KFbxFileTexture>(lProperty.GetSrcObject(KFbxFileTexture::ClassId, lTextureIndex));
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if (lTexture)
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{
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result.diffuseTexture = fbxTextureToOsgTexture(lTexture);
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result.diffuseChannel = lTexture->UVSet.Get();
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result.diffuseScaleU = lTexture->GetScaleU();
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result.diffuseScaleV = lTexture->GetScaleV();
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}
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//For now only allow 1 texture
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break;
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}
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}
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// opacity map...
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const KFbxProperty lOpacityProperty = pFbxMat->FindProperty(KFbxSurfaceMaterial::sTransparentColor);
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if (lOpacityProperty.IsValid())
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{
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int lNbTex = lOpacityProperty.GetSrcObjectCount(KFbxFileTexture::ClassId);
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for (int lTextureIndex = 0; lTextureIndex < lNbTex; lTextureIndex++)
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{
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KFbxFileTexture* lTexture = KFbxCast<KFbxFileTexture>(lOpacityProperty.GetSrcObject(KFbxFileTexture::ClassId, lTextureIndex));
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if (lTexture)
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{
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// TODO: if texture image does NOT have an alpha channel, should it be added?
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result.opacityTexture = fbxTextureToOsgTexture(lTexture);
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result.opacityChannel = lTexture->UVSet.Get();
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result.opacityScaleU = lTexture->GetScaleU();
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result.opacityScaleV = lTexture->GetScaleV();
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}
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//For now only allow 1 texture
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break;
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}
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}
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// reflection map...
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const KFbxProperty lReflectionProperty = pFbxMat->FindProperty(KFbxSurfaceMaterial::sReflection);
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if (lReflectionProperty.IsValid())
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{
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int lNbTex = lReflectionProperty.GetSrcObjectCount(KFbxFileTexture::ClassId);
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for (int lTextureIndex = 0; lTextureIndex < lNbTex; lTextureIndex++)
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{
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KFbxFileTexture* lTexture = KFbxCast<KFbxFileTexture>(lReflectionProperty.GetSrcObject(KFbxFileTexture::ClassId, lTextureIndex));
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if (lTexture)
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{
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// support only spherical reflection maps...
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if (KFbxFileTexture::eUMT_ENVIRONMENT == lTexture->CurrentMappingType.Get())
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{
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result.reflectionTexture = fbxTextureToOsgTexture(lTexture);
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result.reflectionChannel = lTexture->UVSet.Get();
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}
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}
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//For now only allow 1 texture
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break;
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}
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}
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// emissive map...
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const KFbxProperty lEmissiveProperty = pFbxMat->FindProperty(KFbxSurfaceMaterial::sEmissive);
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if (lEmissiveProperty.IsValid())
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{
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int lNbTex = lEmissiveProperty.GetSrcObjectCount(KFbxFileTexture::ClassId);
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for (int lTextureIndex = 0; lTextureIndex < lNbTex; lTextureIndex++)
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{
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KFbxFileTexture* lTexture = KFbxCast<KFbxFileTexture>(lEmissiveProperty.GetSrcObject(KFbxFileTexture::ClassId, lTextureIndex));
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if (lTexture)
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{
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result.emissiveTexture = fbxTextureToOsgTexture(lTexture);
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result.emissiveChannel = lTexture->UVSet.Get();
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result.emissiveScaleU = lTexture->GetScaleU();
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result.emissiveScaleV = lTexture->GetScaleV();
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}
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//For now only allow 1 texture
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break;
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}
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}
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if (pFbxLambert)
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{
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fbxDouble3 color = pFbxLambert->Diffuse.Get();
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double factor = pFbxLambert->DiffuseFactor.Get();
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pOsgMat->setDiffuse(osg::Material::FRONT_AND_BACK, osg::Vec4(
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static_cast<float>(color[0] * factor),
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static_cast<float>(color[1] * factor),
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static_cast<float>(color[2] * factor),
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static_cast<float>(1.0 - pFbxLambert->TransparencyFactor.Get())));
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color = pFbxLambert->Ambient.Get();
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factor = pFbxLambert->AmbientFactor.Get();
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pOsgMat->setAmbient(osg::Material::FRONT_AND_BACK, osg::Vec4(
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static_cast<float>(color[0] * factor),
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static_cast<float>(color[1] * factor),
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static_cast<float>(color[2] * factor),
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1.0f));
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color = pFbxLambert->Emissive.Get();
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factor = pFbxLambert->EmissiveFactor.Get();
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pOsgMat->setEmission(osg::Material::FRONT_AND_BACK, osg::Vec4(
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static_cast<float>(color[0] * factor),
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static_cast<float>(color[1] * factor),
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static_cast<float>(color[2] * factor),
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1.0f));
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// get maps factors...
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result.diffuseFactor = pFbxLambert->DiffuseFactor.Get();
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if (const KFbxSurfacePhong* pFbxPhong = KFbxCast<KFbxSurfacePhong>(pFbxLambert))
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{
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color = pFbxPhong->Specular.Get();
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factor = pFbxPhong->SpecularFactor.Get();
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pOsgMat->setSpecular(osg::Material::FRONT_AND_BACK, osg::Vec4(
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static_cast<float>(color[0] * factor),
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static_cast<float>(color[1] * factor),
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static_cast<float>(color[2] * factor),
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1.0f));
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pOsgMat->setShininess(osg::Material::FRONT_AND_BACK,
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static_cast<float>(pFbxPhong->Shininess.Get()));
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// get maps factors...
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result.reflectionFactor = pFbxPhong->ReflectionFactor.Get();
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// get more factors here...
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}
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}
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if (_lightmapTextures)
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{
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// if using an emission map then adjust material properties accordingly...
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if (result.emissiveTexture)
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{
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osg::Vec4 diffuse = pOsgMat->getDiffuse(osg::Material::FRONT_AND_BACK);
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pOsgMat->setEmission(osg::Material::FRONT_AND_BACK, diffuse);
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pOsgMat->setDiffuse(osg::Material::FRONT_AND_BACK, osg::Vec4(0,0,0,diffuse.a()));
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pOsgMat->setAmbient(osg::Material::FRONT_AND_BACK, osg::Vec4(0,0,0,diffuse.a()));
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}
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}
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_fbxMaterialMap.insert(FbxMaterialMap::value_type(pFbxMat, result));
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return result;
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}
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osg::ref_ptr<osg::Texture2D>
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FbxMaterialToOsgStateSet::fbxTextureToOsgTexture(const KFbxFileTexture* fbx)
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{
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ImageMap::iterator it = _imageMap.find(fbx->GetFileName());
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if (it != _imageMap.end())
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return it->second;
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osg::ref_ptr<osg::Image> pImage = NULL;
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// Warning: fbx->GetRelativeFileName() is relative TO EXECUTION DIR
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// fbx->GetFileName() is as stored initially in the FBX
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if ((pImage = osgDB::readImageFile(osgDB::concatPaths(_dir, fbx->GetFileName()), _options)) || // First try "export dir/name"
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(pImage = osgDB::readImageFile(fbx->GetFileName(), _options)) || // Then try "name" (if absolute)
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(pImage = osgDB::readImageFile(osgDB::concatPaths(_dir, fbx->GetRelativeFileName()), _options))) // Else try "current dir/name"
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{
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osg::ref_ptr<osg::Texture2D> pOsgTex = new osg::Texture2D;
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pOsgTex->setImage(pImage.get());
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pOsgTex->setWrap(osg::Texture2D::WRAP_S, convertWrap(fbx->GetWrapModeU()));
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pOsgTex->setWrap(osg::Texture2D::WRAP_T, convertWrap(fbx->GetWrapModeV()));
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_imageMap.insert(std::make_pair(fbx->GetFileName(), pOsgTex.get()));
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return pOsgTex;
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}
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else
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{
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return NULL;
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}
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}
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void FbxMaterialToOsgStateSet::checkInvertTransparency()
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{
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int zeroAlpha = 0, oneAlpha = 0;
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for (FbxMaterialMap::const_iterator it = _fbxMaterialMap.begin(); it != _fbxMaterialMap.end(); ++it)
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{
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const osg::Material* pMaterial = it->second.material.get();
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float alpha = pMaterial->getDiffuse(osg::Material::FRONT).a();
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if (alpha > 0.999f)
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{
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++oneAlpha;
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}
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else if (alpha < 0.001f)
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{
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++zeroAlpha;
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}
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}
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if (zeroAlpha > oneAlpha)
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{
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//Transparency values seem to be back to front so invert them.
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for (FbxMaterialMap::const_iterator it = _fbxMaterialMap.begin(); it != _fbxMaterialMap.end(); ++it)
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{
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osg::Material* pMaterial = it->second.material.get();
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osg::Vec4 diffuse = pMaterial->getDiffuse(osg::Material::FRONT);
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diffuse.a() = 1.0f - diffuse.a();
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pMaterial->setDiffuse(osg::Material::FRONT_AND_BACK, diffuse);
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}
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}
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}
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