C++ Geometry::getFogCoordBinding方法代码示例

void Tessellator::handleNewVertices(osg::Geometry& geom,VertexPtrToIndexMap &vertexPtrToIndexMap)
{
    if (!_newVertexList.empty())
    {
        
        osg::Vec3Array* vertices = dynamic_cast<osg::Vec3Array*>(geom.getVertexArray());
        osg::Vec3Array* normals = NULL;
        if (geom.getNormalBinding()==osg::Geometry::BIND_PER_VERTEX)
        {
            normals = dynamic_cast<osg::Vec3Array*>(geom.getNormalArray());
        }
        
        typedef std::vector<osg::Array*> ArrayList;
        ArrayList arrays;
        
        if (geom.getColorBinding()==osg::Geometry::BIND_PER_VERTEX)
        {
            arrays.push_back(geom.getColorArray());
        }
        
        if (geom.getSecondaryColorBinding()==osg::Geometry::BIND_PER_VERTEX)
        {
            arrays.push_back(geom.getSecondaryColorArray());
        }
        
        if (geom.getFogCoordBinding()==osg::Geometry::BIND_PER_VERTEX)
        {
            arrays.push_back(geom.getFogCoordArray());
        }
        
        osg::Geometry::ArrayDataList& tcal = geom.getTexCoordArrayList();
        for(osg::Geometry::ArrayDataList::iterator tcalItr=tcal.begin();
            tcalItr!=tcal.end();
            ++tcalItr)
        {
            if (tcalItr->array.valid()) 
            {
                arrays.push_back(tcalItr->array.get());
            }
        }
        
        // now add any new vertices that are required.
        for(NewVertexList::iterator itr=_newVertexList.begin();
            itr!=_newVertexList.end();
            ++itr)
        {
            NewVertex& newVertex = (*itr);
            osg::Vec3* vertex = newVertex._vpos;
            
            // assign vertex.
            vertexPtrToIndexMap[vertex]=vertices->size();
            vertices->push_back(*vertex);
            
            // assign normals
            if (normals)
            {
                osg::Vec3 norm(0.0f,0.0f,0.0f);
                if (newVertex._v1) norm += (*normals)[vertexPtrToIndexMap[newVertex._v1]] * newVertex._f1;
                if (newVertex._v2) norm += (*normals)[vertexPtrToIndexMap[newVertex._v2]] * newVertex._f2;
                if (newVertex._v3) norm += (*normals)[vertexPtrToIndexMap[newVertex._v3]] * newVertex._f3;
                if (newVertex._v4) norm += (*normals)[vertexPtrToIndexMap[newVertex._v4]] * newVertex._f4;
                norm.normalize();
                normals->push_back(norm);
            }
            
            if (!arrays.empty())
            {
                InsertNewVertices inv(newVertex._f1,vertexPtrToIndexMap[newVertex._v1],
                    newVertex._f2,vertexPtrToIndexMap[newVertex._v2],
                    newVertex._f3,vertexPtrToIndexMap[newVertex._v3],
                    newVertex._f4,vertexPtrToIndexMap[newVertex._v4]);
                
                // assign the rest of the attributes.
                for(ArrayList::iterator aItr=arrays.begin();
                aItr!=arrays.end();
                ++aItr)
                {
                    (*aItr)->accept(inv);
                }
            }
        }
        
    }
    
}

void IndexMeshVisitor::apply(osg::Geometry& geom) {
    // TODO: this is deprecated
    if (geom.getNormalBinding() == osg::Geometry::BIND_PER_PRIMITIVE_SET) return;
    if (geom.getColorBinding() == osg::Geometry::BIND_PER_PRIMITIVE_SET) return;
    if (geom.getSecondaryColorBinding() == osg::Geometry::BIND_PER_PRIMITIVE_SET) return;
    if (geom.getFogCoordBinding() == osg::Geometry::BIND_PER_PRIMITIVE_SET) return;

    // no point optimizing if we don't have enough vertices.
    if (!geom.getVertexArray() || geom.getVertexArray()->getNumElements() < 3) return;


    osgUtil::SharedArrayOptimizer deduplicator;
    deduplicator.findDuplicatedUVs(geom);

    // duplicate shared arrays as it isn't safe to rearrange vertices when arrays are shared.
    if (geom.containsSharedArrays()) {
        geom.duplicateSharedArrays();
    }

    osg::Geometry::PrimitiveSetList& primitives = geom.getPrimitiveSetList();
    osg::Geometry::PrimitiveSetList::iterator itr;

    osg::Geometry::PrimitiveSetList new_primitives;
    new_primitives.reserve(primitives.size());

    // compute duplicate vertices
    typedef std::vector<unsigned int> IndexList;
    unsigned int numVertices = geom.getVertexArray()->getNumElements();
    IndexList indices(numVertices);
    unsigned int i, j;
    for(i = 0 ; i < numVertices ; ++ i) {
        indices[i] = i;
    }

    VertexAttribComparitor arrayComparitor(geom);
    std::sort(indices.begin(), indices.end(), arrayComparitor);

    unsigned int lastUnique = 0;
    unsigned int numUnique = 1;
    for(i = 1 ; i < numVertices ; ++ i) {
        if (arrayComparitor.compare(indices[lastUnique], indices[i]) != 0) {
            lastUnique = i;
            ++ numUnique;
        }
    }

    IndexList remapDuplicatesToOrignals(numVertices);
    lastUnique = 0;
    for(i = 1 ; i < numVertices ; ++ i) {
        if (arrayComparitor.compare(indices[lastUnique],indices[i]) != 0) {
            // found a new vertex entry, so previous run of duplicates needs
            // to be put together.
            unsigned int min_index = indices[lastUnique];
            for(j = lastUnique + 1 ; j < i ; ++ j) {
                min_index = osg::minimum(min_index, indices[j]);
            }
            for(j = lastUnique ; j < i ; ++ j) {
                remapDuplicatesToOrignals[indices[j]] = min_index;
            }
            lastUnique = i;
        }
    }

    unsigned int min_index = indices[lastUnique];
    for(j = lastUnique + 1 ; j < i ; ++ j) {
        min_index = osg::minimum(min_index, indices[j]);
    }
    for(j = lastUnique ; j < i ; ++ j) {
        remapDuplicatesToOrignals[indices[j]] = min_index;
    }

    // copy the arrays.
    IndexList finalMapping(numVertices);
    IndexList copyMapping;
    copyMapping.reserve(numUnique);
    unsigned int currentIndex = 0;
    for(i = 0 ; i < numVertices ; ++ i) {
        if (remapDuplicatesToOrignals[i] == i) {
            finalMapping[i] = currentIndex;
            copyMapping.push_back(i);
            currentIndex++;
        }
        else {
            finalMapping[i] = finalMapping[remapDuplicatesToOrignals[i]];
        }
    }

    // remap any shared vertex attributes
    RemapArray ra(copyMapping);
    arrayComparitor.accept(ra);

    // triangulate faces
    {
        TriangleIndexor ti;
        ti._maxIndex = numVertices;
        ti._remapping = finalMapping;

        for(itr = primitives.begin() ; itr != primitives.end() ; ++ itr) {
            (*itr)->accept(ti);
        }
//.........这里部分代码省略.........