C++ PerformanceCounter::StartCounter方法代码示例

void idle(void*)
{
  if (previousPlayButtonStatus == ON)  
  {
    // it means we should measure the interval between two frames
    // if it is too tiny, we should slow down the motion
    performanceCounter.StopCounter();
    double actualTimeCostOneFrame = performanceCounter.GetElapsedTime(); // in seconds

    // time spent on saving the screen in previous time-step should be excluded
    if (saveFileTimeCost > 0.0)   
      actualTimeCostOneFrame -= saveFileTimeCost;

    framesIncrementDoublePrecision = actualTimeCostOneFrame * expectedFPS;
  }
  // start counter at the beginning of the new round
  if (playButton == ON)
    performanceCounter.StartCounter();

  if(rewindButton == ON)
  {
    currentFrameIndex = 0;
    currentFrameIndexDoublePrecision = 0.0;
    for (int i = 0; i < displayer.GetNumSkeletons(); i++)
    {
      if (displayer.GetSkeletonMotion(i) != NULL)
      {
        Posture * initSkeleton = displayer.GetSkeletonMotion(i)->GetPosture(0);
        displayer.GetSkeleton(i)->setPosture(*initSkeleton);
      }
    }
    rewindButton = OFF;
  }

  // Initialization
  saveFileTimeCost = -1.0;

  if(playButton == ON) 
  {
    if (saveScreenToFile == SAVE_CONTINUOUS)
    {
      saveFileTimeCounter.StartCounter();
      CreateScreenFilename(SAVE_CONTINUOUS, saveScreenToFileContinuousCount, saveScreenToFileContinuousFilename);
      saveScreenshot(640, 480, saveScreenToFileContinuousFilename);
      printf("%s is saved to disk.\n", saveScreenToFileContinuousFilename);
      saveScreenToFileContinuousCount++;
      saveFileTimeCounter.StopCounter();
      saveFileTimeCost = saveFileTimeCounter.GetElapsedTime();
    }

    if (saveScreenToFile == SAVE_CONTINUOUS)
    {
      currentFrameIndexDoublePrecision += 1.0;
    }
    else
    {
      currentFrameIndexDoublePrecision += framesIncrementDoublePrecision;
    }

    currentFrameIndex = (int)currentFrameIndexDoublePrecision;

    if(currentFrameIndex >= maxFrames)
    {
      if (repeatButton == ON)
      {
        currentFrameIndex = 0;
        currentFrameIndexDoublePrecision = 0.0;
      }
      else  // repeat button is OFF
      {
        currentFrameIndex = maxFrames - 1;
        currentFrameIndexDoublePrecision = currentFrameIndex;
        playButton = OFF;  // important, especially in "recording" mode
      }
    }

    if (currentFrameIndex < 0)
    {
      currentFrameIndex = 0;
      currentFrameIndexDoublePrecision = 0.0;
    }

    SetSkeletonsToSpecifiedFrame(currentFrameIndex);

    frame_slider->value((double) currentFrameIndex + 1);
  }  // if(playButton == ON)

  if (minusOneButton == ON)
    if (displayer.GetNumSkeletons() != 0)
    {
      currentFrameIndex--;
      if (currentFrameIndex < 0)
        currentFrameIndex = 0;
      frame_slider->value((double) currentFrameIndex + 1);

      SetSkeletonsToSpecifiedFrame(currentFrameIndex);    
      if (saveScreenToFile == SAVE_CONTINUOUS)
      {
        CreateScreenFilename(SAVE_CONTINUOUS, saveScreenToFileContinuousCount, saveScreenToFileContinuousFilename);
        saveScreenshot(640, 480, saveScreenToFileContinuousFilename);
//.........这里部分代码省略.........

int main(int argc, char **argv) 
{
  // Initialize form, sliders and buttons
  form = make_window();

  performanceCounter.StartCounter();  // init
  saveFileTimeCounter.StartCounter(); // init

  groundPlane_button->value(groundPlane);
  fog_button->value(useFog);
  worldAxes_button->value(renderWorldAxes);
  frame_slider->value(1);
  if (saveScreenToFile == SAVE_CONTINUOUS)
    record_button->value(1);  // ON
  else
    record_button->value(0);  // OFF

  // just do some timing, no special purpose
  // because the first data is always not trustable according to experience
  performanceCounter.StopCounter(); 
  performanceCounter.GetElapsedTime();
  saveFileTimeCounter.StopCounter();
  saveFileTimeCounter.GetElapsedTime();
  performanceCounter.StartCounter();
  // show form, and do initial draw of model
  form->show();
  glwindow->show(); // glwindow is initialized when the form is built
  performanceCounter.StopCounter();

  if (argc > 2)
  {
    char *filename;

    filename = argv[1];
    if(filename != NULL)
    {
      //Read skeleton from asf file
      pSkeleton = new Skeleton(filename, MOCAP_SCALE);

      //Set the rotations for all bones in their local coordinate system to 0
      //Set root position to (0, 0, 0)
      pSkeleton->setBasePosture();
      displayer.LoadSkeleton(pSkeleton);
      lastSkeleton++;
    }

    if (displayer.GetNumSkeletons())
    {
      filename = argv[2];
      if(filename != NULL)
      {
        //Read motion (.amc) file and create a motion
        pMotion = new Motion(filename, MOCAP_SCALE,pSkeleton);

        //set sampled motion for display
        displayer.LoadMotion(pMotion);               
        
        lastMotion++;

        //Tell skeleton to perform the first pose ( first posture )
        pSkeleton->setPosture(*(displayer.GetSkeletonMotion(0)->GetPosture(0)));          

        // Set skeleton to perform the first pose ( first posture )         
        int currentFrames = displayer.GetSkeletonMotion(0)->GetNumFrames();
        if (currentFrames > maxFrames)
        {
          maxFrames = currentFrames;
          frame_slider->maximum((double)maxFrames);

        }
        frame_slider->maximum((double)maxFrames);

        currentFrameIndex=0;
      } // if(filename != NULL)
    }
    else
      printf("Load a skeleton first.\n");
    framesIncrementDoublePrecision = 1.0;            // Current frame and frame increment
    playButton = ON;
    repeatButton = OFF;
    groundPlane = ON; 
    glwindow->redraw();
  }  // if (argc > 2)
  Fl::add_idle(idle);
  return Fl::run();
}

// the "idle" routine; called periodically by GLUT 
void idleFunction(void)
{
  cpuLoadCounter.StartCounter();

  glutSetWindow(windowID);
  
  if (!lockScene)
  {
    // determine force in case user is pulling on a vertex
    if (g_iLeftMouseButton) 
    {
      if (pulledVertex != -1)
      {
        double forceX = (g_vMousePos[0] - dragStartX);
        double forceY = -(g_vMousePos[1] - dragStartY);

        double externalForce[3];

        camera->CameraVector2WorldVector_OrientationOnly3D(
          forceX, forceY, 0, externalForce);

        renderingModalMatrix->ProjectSingleVertex(pulledVertex,
          externalForce[0], externalForce[1], externalForce[2], fq);

        for(int i=0; i<r; i++)
          fq[i] = fqBase[i] + deformableObjectCompliance * fq[i];
      }
    }
    else
    {
      memcpy(fq,fqBase,sizeof(double) * r);
    }

    // set the reduced external forces
    implicitNewmarkDense->SetExternalForces(fq);

    // integrate the dynamics via implicit Newmark
    for(int i=0; i<substepsPerTimeStep; i++)
    {
      int code = implicitNewmarkDense->DoTimestep();
      if (code != 0)
      {
        printf("The integrator went unstable. Reduce the timestep, or increase the number of substeps per timestep.\n");
        implicitNewmarkDense->ResetToRest();
        for(int i=0; i<r; i++)
        {
          fqBase[i] = 0;
          fq[i] = 0;
        }
        implicitNewmarkDense->SetExternalForces(fq);
        explosionFlag = 1;
        explosionCounter.StartCounter();
        break;
      }

      /*
        printf("q =\n");
        double * q = implicitNewmarkDense->Getq();
        for(int i=0; i<r; i++)
          printf("%G ", q[i]);
        printf("\n");
      */
    }

    memcpy(q, implicitNewmarkDense->Getq(), sizeof(double) * r);
  }

  if (explosionFlag)
  {
    explosionCounter.StopCounter();
    if (explosionCounter.GetElapsedTime() > 4.0) // the message will appear on screen for 4 seconds
      explosionFlag = 0;
  }

  // compute u=Uq
  deformableObjectRenderingMeshReduced->Setq(q);
  deformableObjectRenderingMeshReduced->Compute_uUq();

  graphicFrame++;
  
  // update title bar information at 4 Hz
  titleBarCounter.StopCounter();
  double elapsedTime = titleBarCounter.GetElapsedTime();
  if (elapsedTime >= 1.0 / 4)
  {
    titleBarCounter.StartCounter();
    fps = graphicFrame / elapsedTime;

    // update menu bar
    char windowTitle[4096];
    sprintf(windowTitle,"%s | Num modes = %d | %.1f Hz | Deformation CPU Load: %d%%", windowTitleBase, 
      implicitNewmarkDense->GetNumDOFs() , fps, (int)(100 * cpuLoad + 0.5) );
    glutSetWindowTitle(windowTitle);
    graphicFrame = 0;

    if (syncTimeStepWithGraphics)
    {
      timeStep = 1.0 / fps;
      implicitNewmarkDense->SetTimestep(timeStep / substepsPerTimeStep);
//.........这里部分代码省略.........