我有一些代码如下所示:
typedef pcl::PointXYZRGB pcl_ColorPointType;
typedef pcl::PointXYZ pcl_PointType;
typedef pcl::PointCloud<pcl_PointType> pcl_XYZPointCloudType;
typedef pcl::PointCloud<pcl_ColorPointType> pcl_ColorPointCloudType;
typedef pcl_XYZPointCloudType::Ptr pcl_XYZPointCloudPtrType;
typedef pcl_ColorPointCloudType::Ptr pcl_ColorPointCloudPtrType;
void
BuildMeshFromDepthImage()
{
pcl_XYZPointCloudConstPtrType pointCloud = BuildPurePointCloudFromDepthImage( ); // assume BuildPurePointCloudFromDepthImage function exists
BuildMeshFromPointCloud<pcl_XYZPointCloudConstPtrType>( pointCloud );
}
template<typename T_pclPtr>
void BuildMeshFromPointCloud(const T_pclPtr &pointCloud )
{
// some code
// error: no type named 'value_type'
const typename T_pclPtr::value_type::PointType& pt = pointCloud->points[i];
// some code
}
知道为什么这不起作用吗?附言此代码适用于 VS2010,但不适用于 GCC4.9。会不会是PCL库版本不同?
最佳答案
来自 pcl::PointCloud< PointT > Class Template Reference
typedef boost::shared_ptr< PointCloud< PointT > > Ptr
element_type is T when T is not an array type, and U when T is U[] or U[N].
这是你需要的:
typename T_pclPtr::element_type::PointType& t= pointCloud->points[i];
对于 C++11 或更高版本,你可以使用这个:
auto t= pointCloud->points[i];
关于c++ - 错误 : no type named 'value_type' in 'class boost::shared_ptr<const pcl::PointCloud<pcl::PointXYZ>>' ,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/40415403/