FGFS-4.1/OpenSceneGraph
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From Bob Kuehne, "* add easy multiple texture targets support for obj by refactoring texture

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load into it's own method.

* use new method from step 1 to load 'map_opacity' textures from .mtl files"
This commit is contained in:
Robert Osfield 2008-05-12 10:18:41 +00:00
parent db2cf75b23
commit 61cb0833b9
3 changed files with 62 additions and 47 deletions
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104
src/osgPlugins/obj/ReaderWriterOBJ.cpp
View File

@ -159,10 +159,56 @@ inline osg::Vec3 ReaderWriterOBJ::transformNormal(const osg::Vec3& vec, const bo
// register with Registry to instantiate the above reader/writer.
REGISTER_OSGPLUGIN(obj, ReaderWriterOBJ)
void load_material_texture( obj::Model &model,
obj::Material &material,
osg::StateSet *stateset,
const std::string & filename,
const unsigned int texture_unit )
{
if (!filename.empty())
{
osg::ref_ptr< osg::Image > image;
if ( !model.getDatabasePath().empty() )
{
// first try with databasr path of parent.
image = osgDB::readImageFile(model.getDatabasePath()+'/'+filename);
}
if ( !image.valid() )
{
// if not already set then try the filename as is.
image = osgDB::readImageFile(filename);
}
if ( image.valid() )
{
osg::Texture2D* texture = new osg::Texture2D( image.get() );
osg::Texture::WrapMode textureWrapMode = osg::Texture::REPEAT;
texture->setWrap(osg::Texture2D::WRAP_R, textureWrapMode);
texture->setWrap(osg::Texture2D::WRAP_S, textureWrapMode);
texture->setWrap(osg::Texture2D::WRAP_T, textureWrapMode);
stateset->setTextureAttributeAndModes( texture_unit, texture,osg::StateAttribute::ON );
if ( material.textureReflection )
{
osg::TexGen* texgen = new osg::TexGen;
texgen->setMode(osg::TexGen::SPHERE_MAP);
stateset->setTextureAttributeAndModes( texture_unit,texgen,osg::StateAttribute::ON );
}
if ( image->isImageTranslucent())
{
osg::notify(osg::INFO)<<"Found transparent image"<<std::endl;
stateset->setMode(GL_BLEND, osg::StateAttribute::ON);
stateset->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
}
}
}
}
void ReaderWriterOBJ::buildMaterialToStateSetMap(obj::Model& model, MaterialToStateSetMap& materialToStateSetMap) const
{
osg::Texture::WrapMode textureWrapMode = osg::Texture::REPEAT;
if (_fixBlackMaterials)
{
// hack to fix Maya exported models that contian all black materials.
@ -208,7 +254,7 @@ void ReaderWriterOBJ::buildMaterialToStateSetMap(obj::Model& model, MaterialToSt
{
obj::Material& material = itr->second;
osg::StateSet* stateset = new osg::StateSet;
osg::ref_ptr< osg::StateSet > stateset = new osg::StateSet;
bool isTransparent = false;
@ -238,51 +284,15 @@ void ReaderWriterOBJ::buildMaterialToStateSetMap(obj::Model& model, MaterialToSt
}
// handle textures
if (!material.map_Kd.empty())
enum TextureUnit
{
std::string filename = material.map_Kd;
osg::Image* image = 0;
if (!model.getDatabasePath().empty())
{
// first try with databasr path of parent.
image = osgDB::readImageFile(model.getDatabasePath()+'/'+filename);
}
if (!image)
{
// if not already set then try the filename as is.
image = osgDB::readImageFile(filename);
}
if (image)
{
osg::Texture2D* texture = new osg::Texture2D(image);
texture->setWrap(osg::Texture2D::WRAP_R, textureWrapMode);
texture->setWrap(osg::Texture2D::WRAP_S, textureWrapMode);
texture->setWrap(osg::Texture2D::WRAP_T, textureWrapMode);
stateset->setTextureAttributeAndModes(0,texture,osg::StateAttribute::ON);
if (material.textureReflection)
{
osg::TexGen* texgen = new osg::TexGen;
texgen->setMode(osg::TexGen::SPHERE_MAP);
stateset->setTextureAttributeAndModes(0,texgen,osg::StateAttribute::ON);
}
if (!isTransparent && image->isImageTranslucent())
{
osg::notify(osg::INFO)<<"Found transparent image"<<std::endl;
isTransparent = true;
}
}
}
if (isTransparent)
{
stateset->setMode(GL_BLEND, osg::StateAttribute::ON);
stateset->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
}
TEXTURE_UNIT_KD = 0,
TEXTURE_UNIT_OPACITY
};
load_material_texture( model, material, stateset.get(), material.map_Kd, TEXTURE_UNIT_KD );
load_material_texture( model, material, stateset.get(), material.map_opacity, TEXTURE_UNIT_OPACITY );
materialToStateSetMap[material.name] = stateset;
materialToStateSetMap[material.name] = stateset.get();
}
}
@ -631,7 +641,7 @@ osgDB::ReaderWriter::ReadResult ReaderWriterOBJ::readNode(const std::string& fil
model.setDatabasePath(osgDB::getFilePath(fileName.c_str()));
model.readOBJ(fin, local_opt.get());
// code for checking the nonRotation
// code for checking the noRotation
bool rotate = true;
if ((options!=NULL) && (options->getOptionString() == "noRotation"))
{

4
src/osgPlugins/obj/obj.cpp
View File

@ -263,6 +263,10 @@ bool Model::readMTL(std::istream& fin)
{
material->map_Ks = lastComponent(line+7);
}
else if (strncmp(line,"map_opacity ",7)==0)
{
material->map_opacity = lastComponent(line+7);
}
else if (strcmp(line,"refl")==0 || strncmp(line,"refl ",5)==0)
{
material->textureReflection = true;

1
src/osgPlugins/obj/obj.h
View File

@ -67,6 +67,7 @@ public:
std::string map_Ka;
std::string map_Kd;
std::string map_Ks;
std::string map_opacity;
bool textureReflection;
float alpha;
float uScale;