CODEWITHSUNDEEP
c++
Ahmad Farid
Ahmad Farid

Reputation: 14774

How to pause a program for a few milliseconds?

How to pause a program for a few milliseconds using C++ managed code? I tried Sleep() but it didn't work when I included the winbase.h file, I got lots of compile errors!

for(int i=0; i<10; i++)
 {
   simpleOpenGlControl1->MakeCurrent();
  System::Threading::Thread::Sleep(100);
      theta_rotated += 2.0* 3.141592653/(double)Model->size()/10.0;

  simpleOpenGlControl1->Invalidate();
 }

private: System::Void simpleOpenGlControl1_Paint(System::Object^  sender, System::Windows::Forms::PaintEventArgs^  e) 
         {

             Gl::glMatrixMode(Gl::GL_MODELVIEW);
             Gl::glLoadIdentity();
             Gl::glClearColor(1, 1, 1, 1);
             Gl::glClear(Gl::GL_COLOR_BUFFER_BIT | Gl::GL_DEPTH_BUFFER_BIT);
             camera->Tellgl();
             Gl::glRotated(Angle,X,Y,Z);
             RenderModels();
         }
void RenderModels(void)
{
    Points = gcnew System::Collections::Generic::List<Point>();
    Point p(0,0) ;
    int t = -5;
    double r = 5;
    double x, z, theta;
    for(int i = 0;i < Model->size();i++)
    {
        theta = i*2* 3.141592653/ (double)Model->size();
        x = r*sin(theta + theta_rotated);
        z = r*cos(theta + theta_rotated);
         Gl::glPushMatrix();
         Gl::glTranslated(x,0,z);
         Model->at(i).Render();
         p.X=x;
         p.Y=0;

         Points->Add(p);
         t +=1;
         Gl::glPopMatrix();
    }
    //simpleOpenGlControl1->Invalidate();
}

Upvotes: 4

Views: 3881

Answers (3)

Andrey
Andrey

Reputation: 60105

System::Threading::Thread::Sleep() as mentioned in another answer. But let me warn you, it is not precise, and for small (milliseconds) Sleep is extremely imprecise. consider that your app run together with other apps and threads and they all want processor time.

Upvotes: 3

darkturo
darkturo

Reputation: 124

#include <unistd.h>

main() {    
   usleep(2000); // 2 msecs 
}

Read the man pages ;-) man 3 usleep

Upvotes: -2

Billy ONeal
Billy ONeal

Reputation: 106609

You want System::Threading::Thread::Sleep(). http://msdn.microsoft.com/en-us/library/system.threading.thread.sleep.aspx

Upvotes: 4

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