我在C写一个小程序 . 我创建了2个文件“Main.cpp”和“openni_grabber.cpp” . 正如你从代码中看到的那样，我从主要的线程开始 . 一旦我尝试构建，我收到一条错误消息：'SimpleOpenNIProcessor'未在此范围内声明 .
在代码中我需要声明SimpleOpenNIProcessor吗？
Main.cpp的
#include <pcl/io/openni_grabber.h>
#include <pcl/visualization/cloud_viewer.h>
int main()
{
SimpleOpenNIProcessor v;
v.run();
return(0);
}
openni_grabber.cpp
#include <pcl/point_cloud.h>
#include <pcl/point_types.h>
#include <pcl/io/openni_grabber.h>
#include <pcl/common/time.h>
class SimpleOpenNIProcessor
{
SimpleOpenNIProcessor()
{
};
public:
void cloud_cb_ (const pcl::PointCloud<pcl::PointXYZRGBA>::ConstPtr &cloud)
{
static unsigned count = 0;
static double last = pcl::getTime ();
if (++count == 30)
{
double now = pcl::getTime ();
std::cout << "distance of center pixel :" << cloud->points [(cloud->width >> 1) * (cloud->height + 1)].z << " mm. Average framerate: " << double(count)/double(now - last) << " Hz" << std::endl;
count = 0;
last = now;
}
}
void run ()
{
// create a new grabber for OpenNI devices
pcl::Grabber* interface = new pcl::OpenNIGrabber();
// make callback function from member function
boost::function<void (const pcl::PointCloud<pcl::PointXYZRGBA>::ConstPtr&)> f =
boost::bind (&SimpleOpenNIProcessor::cloud_cb_, this, _1);
// connect callback function for desired signal. In this case its a point cloud with color values
boost::signals2::connection c = interface->registerCallback (f);
// start receiving point clouds
interface->start ();
// wait until user quits program with Ctrl-C, but no busy-waiting -> sleep (1);
while (true)
boost::this_thread::sleep (boost::posix_time::seconds (1));
// stop the grabber
interface->stop ();
}
}
1 回答
好吧，就像它说：
SimpleOpenNIProcessor未在您尝试实例化它时声明 .我们通常将类定义放在头文件中，以方便地将它们洒在我们的项目中 .
有关更多信息，请阅读您的C书 .