displaying array of points

Nelly · #1 26-May-2004, 05:29

Hello,

I have a struct which consist of 5 varaibles.

CPP / C++ / C Code:

struct Face
{
    //has x and y cordinates
     int mouth; 
     int nose;
    . . . 
    int FrameNo;
 }

This stuct is stored in a vector.

CPP / C++ / C Code:

Face FT;

vector < Face > & Feat

The vector will store several struct and is indexed by FrameNo.

I use an array of point[5], to display the different screen cordinates of those variables, which is declared in myDoc class.

CPP / C++ / C Code:

CPoint mypoint[5];
int poinIndex = 0    //use as index to the points.

On mouse click, the points are drawn on screen and the struct are updated with the respective cordinates, for each frameNo. Then the struct is push in the vector.

CPP / C++ / C Code:

save (std::vector < Face > & Feat)
{
    Feat.push_back(FT);
}

It can happen that not all variable are updated at the same time. so some might not have a value.
Now I want to display those variables which have a value (not Zero) as per FrameNo.

CPP / C++ / C Code:

RetrieveFeatures (std::vector < Face > & Feat)
{
     CMFFADoc* pDoc = GetDocument();

     //Create loop to access elements in the vector
     for(int i = 0; i < Feat.size();i++)
        {
            FT =  Feat[i]; //assigning the value from vector to struct

           if(pDoc->m_CurrentFrame == FaceFeat.FrameNo)
            {
  
         for(pDoc->pointIndex = 0;pDoc->pointIndex <= 5; pDoc->pointIndex++)
{
      //Get the values for the controls and on display image
    if(FT.mouthX != 0 && FT.mouthY != 0)
       {
            pDoc->m_point[0].x = FT.mouthX;
            pDoc->m_point[0].y = FT.mouthY;
        }

     if (FT.noseX != 0 && FT.noseY!= 0)
        {
           pDoc->m_point[1].x = FT.noseX;
            pDoc->m_point[1].y = FT.noseY;
        }

And I want to be able to go back to the frame allocate the missing point (ie, the onee with zero value).
BUT the problem is that system assumes that all 5 points are allocated even those with the zero values.
So I can't update the empty points.

How can I control the display of the array of points so that only the index of the ones with values will be counted and so that I can later update the empty ones.

Can anyone please, please HELP ! ! ! !

Thanks

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