readerwriter3ds.cpp

最新osg包

                lib3ds_vector_transform(c,*matrix, m->pointL[i].pos);
                (*osg_coords)[orig2NewMapping[i]].set(c[0],c[1],c[2]);
            }
            else
            {
                // original no transform code.
                (*osg_coords)[orig2NewMapping[i]].set(m->pointL[i].pos[0],m->pointL[i].pos[1],m->pointL[i].pos[2]);
            }
        }
    }

    // create texture coords if needed.
    if (m->texels>0)
    {
        if (m->texels==m->points)
        {
            osg::Vec2Array* osg_tcoords = new osg::Vec2Array(noVertex);
            geom->setTexCoordArray(0,osg_tcoords);
            for (i=0; i<m->texels; ++i)
            {
                if (orig2NewMapping[i]>=0) (*osg_tcoords)[orig2NewMapping[i]].set(m->texelL[i][0],m->texelL[i][1]);
            }
        }
        else
        {
            osg::notify(osg::WARN)<<"Warning: in 3ds loader m->texels ("<<m->texels<<") != m->points ("<<m->points<<")"<< std::endl;
        }
    }

    // create normals.
    if (_usePerVertexNormals)
    {
        osg::Vec3Array* osg_normals = new osg::Vec3Array(noVertex);
        
        // initialize normal list to zero's.
        for (i=0; i<noVertex; ++i)
        {
            (*osg_normals)[i].set(0.0f,0.0f,0.0f);
        }

        for (fitr=faceList.begin();
            fitr!=faceList.end();
            ++fitr)
        {
            Lib3dsFace& face = m->faceL[*fitr];

            (*osg_normals)[orig2NewMapping[face.points[0]]] += osg::Vec3(face.normal[0],face.normal[1],face.normal[2]);;
            (*osg_normals)[orig2NewMapping[face.points[1]]] += osg::Vec3(face.normal[0],face.normal[1],face.normal[2]);;
            (*osg_normals)[orig2NewMapping[face.points[2]]] += osg::Vec3(face.normal[0],face.normal[1],face.normal[2]);;

        }

        if (matrix)
        {
            osg::Matrix osg_matrix;
            copyLib3dsMatrixToOsgMatrix(osg_matrix, *matrix);
            for (i=0; i<noVertex; ++i)
            {
                (*osg_normals)[i] = osg::Matrix::transform3x3((*osg_normals)[i], osg_matrix);
            }
        }

        // normalize the normal list to unit length normals.
        for (i=0; i<noVertex; ++i)
        {
            (*osg_normals)[i].normalize();
        }

        geom->setNormalArray(osg_normals);
        geom->setNormalBinding(osg::Geometry::BIND_PER_VERTEX);

    }
    else 
    {
        osg::Vec3Array* osg_normals = new osg::Vec3Array(faceList.size());
        osg::Vec3Array::iterator normal_itr = osg_normals->begin();
        for (fitr=faceList.begin();
            fitr!=faceList.end();
            ++fitr)
        {
            Lib3dsFace& face = m->faceL[*fitr];
            *(normal_itr++) =  osg::Vec3(face.normal[0],face.normal[1],face.normal[2]);
        }
        geom->setNormalArray(osg_normals);
        geom->setNormalBinding(osg::Geometry::BIND_PER_PRIMITIVE);
    }
    
    osg::Vec4ubArray* osg_colors = new osg::Vec4ubArray(1);
    (*osg_colors)[0].set(255,255,255,255);
    geom->setColorArray(osg_colors);
    geom->setColorBinding(osg::Geometry::BIND_OVERALL);
    

    // create primitives
    int numIndices = faceList.size()*3;
    DrawElementsUShort* elements = new osg::DrawElementsUShort(osg::PrimitiveSet::TRIANGLES,numIndices);
    DrawElementsUShort::iterator index_itr = elements->begin();

    for (fitr=faceList.begin();
        fitr!=faceList.end();
        ++fitr)
    {
        Lib3dsFace& face = m->faceL[*fitr];

        *(index_itr++) = orig2NewMapping[face.points[0]];
        *(index_itr++) = orig2NewMapping[face.points[1]];
        *(index_itr++) = orig2NewMapping[face.points[2]];
    }
   
    geom->addPrimitiveSet(elements);

#if 0
    osgUtil::TriStripVisitor tsv;
    tsv.stripify(*geom);
#endif

    return geom;
}


osg::Texture2D*  ReaderWriter3DS::ReaderObject::createTexture(Lib3dsTextureMap *texture,const char* label,bool& transparancy, const osgDB::ReaderWriter::Options* options)
{
    if (texture && *(texture->name))
    {
        std::string fileName = osgDB::findFileInDirectory(texture->name,_directory,osgDB::CASE_INSENSITIVE);
        if (fileName.empty()) 
        {
            // file not found in .3ds file's directory, so we'll look in the datafile path list.
            fileName = osgDB::findDataFile(texture->name,options, osgDB::CASE_INSENSITIVE);
        }
        
        if (fileName.empty())
        {
            osg::notify(osg::WARN) << "texture '"<<texture->name<<"' not found"<< std::endl;
            return NULL;
        }

        if (label) osg::notify(osg::DEBUG_INFO) << label;
        else osg::notify(osg::DEBUG_INFO) << "texture name";
        osg::notify(osg::DEBUG_INFO) << " '"<<texture->name<<"'"<< std::endl;
        osg::notify(osg::DEBUG_INFO) << "    texture flag        "<<texture->flags<< std::endl;
        osg::notify(osg::DEBUG_INFO) << "    LIB3DS_DECALE       "<<((texture->flags)&LIB3DS_DECALE)<< std::endl;
        osg::notify(osg::DEBUG_INFO) << "    LIB3DS_MIRROR       "<<((texture->flags)&LIB3DS_MIRROR)<< std::endl;
        osg::notify(osg::DEBUG_INFO) << "    LIB3DS_NEGATE       "<<((texture->flags)&LIB3DS_NEGATE)<< std::endl;
        osg::notify(osg::DEBUG_INFO) << "    LIB3DS_NO_TILE      "<<((texture->flags)&LIB3DS_NO_TILE)<< std::endl;
        osg::notify(osg::DEBUG_INFO) << "    LIB3DS_SUMMED_AREA  "<<((texture->flags)&LIB3DS_SUMMED_AREA)<< std::endl;
        osg::notify(osg::DEBUG_INFO) << "    LIB3DS_ALPHA_SOURCE "<<((texture->flags)&LIB3DS_ALPHA_SOURCE)<< std::endl;
        osg::notify(osg::DEBUG_INFO) << "    LIB3DS_TINT         "<<((texture->flags)&LIB3DS_TINT)<< std::endl;
        osg::notify(osg::DEBUG_INFO) << "    LIB3DS_IGNORE_ALPHA "<<((texture->flags)&LIB3DS_IGNORE_ALPHA)<< std::endl;
        osg::notify(osg::DEBUG_INFO) << "    LIB3DS_RGB_TINT     "<<((texture->flags)&LIB3DS_RGB_TINT)<< std::endl;

        osg::Image* osg_image = osgDB::readImageFile(fileName.c_str());
        if (osg_image==NULL)
        {
            osg::notify(osg::NOTICE) << "Warning: Cannot create texture "<<texture->name<< std::endl;
            return NULL;
        }

        osg::Texture2D* osg_texture = new osg::Texture2D;
        osg_texture->setImage(osg_image);

        // does the texture support transparancy?
        transparancy = ((texture->flags)&LIB3DS_ALPHA_SOURCE)!=0;

        // what is the wrap mode of the texture.
        osg::Texture2D::WrapMode wm = ((texture->flags)&LIB3DS_NO_TILE) ?
                osg::Texture2D::CLAMP :
                osg::Texture2D::REPEAT;
        osg_texture->setWrap(osg::Texture2D::WRAP_S,wm);
        osg_texture->setWrap(osg::Texture2D::WRAP_T,wm);
        osg_texture->setWrap(osg::Texture2D::WRAP_R,wm);
                                 // bilinear.
        osg_texture->setFilter(osg::Texture2D::MIN_FILTER,osg::Texture2D::LINEAR_MIPMAP_NEAREST);

        return osg_texture;
    }
    else
        return NULL;
}


osg::StateSet* ReaderWriter3DS::ReaderObject::createStateSet(Lib3dsMaterial *mat, const osgDB::ReaderWriter::Options* options)
{
    if (mat==NULL) return NULL;

    osg::StateSet* stateset = new osg::StateSet;

    osg::Material* material = new osg::Material;

    float transparency = mat->transparency;
    float alpha = 1.0f-transparency;

    osg::Vec4 ambient(mat->ambient[0],mat->ambient[1],mat->ambient[2],alpha);
    osg::Vec4 diffuse(mat->diffuse[0],mat->diffuse[1],mat->diffuse[2],alpha);
    osg::Vec4 specular(mat->specular[0],mat->specular[1],mat->specular[2],alpha);
    specular *= mat->shin_strength;

    float shininess = mat->shininess;
    material->setName(mat->name);
    material->setAmbient(osg::Material::FRONT_AND_BACK,ambient);
    material->setDiffuse(osg::Material::FRONT_AND_BACK,diffuse);
    material->setSpecular(osg::Material::FRONT_AND_BACK,specular);
    material->setShininess(osg::Material::FRONT_AND_BACK,shininess*128.0f);

    stateset->setAttribute(material);

    bool textureTransparancy=false;
    osg::Texture2D* texture1_map = createTexture(&(mat->texture1_map),"texture1_map",textureTransparancy, options);
    if (texture1_map)
    {
        stateset->setTextureAttributeAndModes(0,texture1_map,osg::StateAttribute::ON);
        
        if (!textureTransparancy)
        {        
            // from an email from Eric Hamil, September 30, 2003.
            // According to the 3DS spec, and other
            // software (like Max, Lightwave, and Deep Exploration) a 3DS material that has
            // a non-white diffuse base color and a 100% opaque bitmap texture, will show the
            // texture with no influence from the base color.
            
            // so we'll override material back to white.
            // and no longer require the decal hack below...
#if 0
            // Eric original fallback
            osg::Vec4 white(1.0f,1.0f,1.0f,alpha);
            material->setAmbient(osg::Material::FRONT_AND_BACK,white);
            material->setDiffuse(osg::Material::FRONT_AND_BACK,white);
            material->setSpecular(osg::Material::FRONT_AND_BACK,white);
#else
            // try alternative to avoid saturating with white
            // setting white as per OpenGL defaults.
            material->setAmbient(osg::Material::FRONT_AND_BACK,osg::Vec4(0.2f,0.2f,0.2f,alpha));
            material->setDiffuse(osg::Material::FRONT_AND_BACK,osg::Vec4(0.8f,0.8f,0.8f,alpha));
            material->setSpecular(osg::Material::FRONT_AND_BACK,osg::Vec4(0.0f,0.0f,0.0f,alpha));
#endif            
        }
        
// no longer required...        
//         bool decal = false;
//         
//         // not sure exactly how to interpret what is best for .3ds
//         // but the default text env MODULATE doesn't work well, and
//         // DECAL seems to work better.
//         osg::TexEnv* texenv = new osg::TexEnv;
//         if (decal)
//         {
//             texenv->setMode(osg::TexEnv::DECAL);
//         }
//         else
//         {
//             texenv->setMode(osg::TexEnv::MODULATE);
//         }
//        stateset->setTextureAttribute(0,texenv);
    }

    if (transparency>0.0f || textureTransparancy)
    {
        stateset->setMode(GL_BLEND,osg::StateAttribute::ON);
        stateset->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
    }

/*
    osg::ref_ptr<osg::Texture> texture1_mask = createTexture(&(mat->texture1_mask),"texture1_mask",textureTransparancy);
    osg::ref_ptr<osg::Texture> texture2_map = createTexture(&(mat->texture2_map),"texture2_map",textureTransparancy);
    osg::ref_ptr<osg::Texture> texture2_mask = createTexture(&(mat->texture2_mask),"texture2_mask",textureTransparancy);
    osg::ref_ptr<osg::Texture> opacity_map = createTexture(&(mat->opacity_map),"opacity_map",textureTransparancy);
    osg::ref_ptr<osg::Texture> opacity_mask = createTexture(&(mat->opacity_mask),"opacity_mask",textureTransparancy);
    osg::ref_ptr<osg::Texture> bump_map = createTexture(&(mat->bump_map),"bump_map",textureTransparancy);
    osg::ref_ptr<osg::Texture> bump_mask = createTexture(&(mat->bump_mask),"bump_mask",textureTransparancy);
    osg::ref_ptr<osg::Texture> specular_map = createTexture(&(mat->specular_map),"specular_map",textureTransparancy);
    osg::ref_ptr<osg::Texture> specular_mask = createTexture(&(mat->specular_mask),"specular_mask",textureTransparancy);
    osg::ref_ptr<osg::Texture> shininess_map = createTexture(&(mat->shininess_map),"shininess_map",textureTransparancy);
    osg::ref_ptr<osg::Texture> shininess_mask = createTexture(&(mat->shininess_mask),"shininess_mask",textureTransparancy);
    osg::ref_ptr<osg::Texture> self_illum_map = createTexture(&(mat->self_illum_map),"self_illum_map",textureTransparancy);
    osg::ref_ptr<osg::Texture> self_illum_mask = createTexture(&(mat->self_illum_mask),"self_illum_mask",textureTransparancy);
    osg::ref_ptr<osg::Texture> reflection_map = createTexture(&(mat->reflection_map),"reflection_map",textureTransparancy);
    osg::ref_ptr<osg::Texture> reflection_mask = createTexture(&(mat->reflection_mask),"reflection_mask",textureTransparancy);
*/
    return stateset;
}