uitouch to fingerid

gistfile1.cpp

const int MAX_TOUCHES= 11; //Oops, it can handle 11, not 10.  Thanks @Bob_at_BH
 
class TouchTrack
{
public:
 
    TouchTrack()
    {
        m_touchPointer = NULL;
    }
 
    void *m_touchPointer;
};
 
TouchTrack g_touchTracker[MAX_TOUCHES];
 
int GetFingerTrackIDByTouch(void* touch)
{
        for (int i=0; i < MAX_TOUCHES; i++)
        {
            if (g_touchTracker[i].m_touchPointer == touch)
            {
                return i;
            }
        }
 
    //LogMsg("Can't locate fingerID by touch %d", touch);
    return -1;
}
 
int AddNewTouch(void* touch)
{
        for (int i=0; i < MAX_TOUCHES; i++)
        {
            if (!g_touchTracker[i].m_touchPointer)
            {
                //hey, an empty slot, yay
                g_touchTracker[i].m_touchPointer = touch;
                return i;
            }
        }
 
    LogMsg("Can't add new fingerID");
    return -1;
}
 
int GetTouchesActive()
{
int count = 0;
 
    for (int i=0; i < MAX_TOUCHES; i++)
        {
            if (g_touchTracker[i].m_touchPointer)
            {
                count++;
            }
        }
return count;
}
 
// Handles the start of a touch
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    // Enumerate through all the touch objects.
 
    for (UITouch *touch in touches)
    {
        //found a touch.  Is it already on our list?
        int fingerID = GetFingerTrackIDByTouch(touch);
 
        if (fingerID == -1)
        {
            //add it to our list
            fingerID = AddNewTouch(touch);
        } else
        {
            //already on the list.  Don't send this
            //LogMsg("Ignoring touch %d", fingerID);
            continue;
        }
 
        CGPoint pt =[touch locationInView:self];
        ConvertCoordinatesIfRequired(pt.x, pt.y);
        GetMessageManager()->SendGUIEx(MESSAGE_TYPE_GUI_CLICK_START,pt.x, pt.y,fingerID);            
    }   
 
       
    #ifdef _DEBUG
    //LogMsg("%d touches active", GetTouchesActive());
    #endif
}
 
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
    // Enumerate through all the touch objects.
    for (UITouch *touch in touches)
    {
        //found a touch.  Is it already on our list?
        int fingerID = GetFingerTrackIDByTouch(touch);
        if (fingerID != -1)
        {
            g_touchTracker[fingerID].m_touchPointer = NULL; //clear it
        } else
        {
            //wasn't on our list
            continue;
        }
         
        CGPoint pt =[touch locationInView:self];
        ConvertCoordinatesIfRequired(pt.x, pt.y);
        GetMessageManager()->SendGUIEx(MESSAGE_TYPE_GUI_CLICK_END,pt.x, pt.y, fingerID);
    }   
}
 
- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
{
    // Enumerate through all the touch objects.
    for (UITouch *touch in touches)
    {
        //found a touch.  Is it already on our list?
        int fingerID = GetFingerTrackIDByTouch(touch);
        if (fingerID != -1)
        {
            g_touchTracker[fingerID].m_touchPointer = NULL; //clear it
        } else
        {
            //wasn't on our list
            continue;
        }
         
        CGPoint pt =[touch locationInView:self];
        ConvertCoordinatesIfRequired(pt.x, pt.y);
        GetMessageManager()->SendGUIEx(MESSAGE_TYPE_GUI_CLICK_END,pt.x, pt.y, fingerID);
    }   
}
 
 
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
   // Enumerate through all the touch objects.
    for (UITouch *touch in touches)
    {
     
        //found a touch.  Is it already on our list?
        int fingerID = GetFingerTrackIDByTouch(touch);
        if (fingerID != -1)
        {
            //found it
        } else
        {
            //wasn't on our list?!
            continue;
        }
     
        CGPoint pt =[touch locationInView:self];
        ConvertCoordinatesIfRequired(pt.x, pt.y);
        GetMessageManager()->SendGUIEx(MESSAGE_TYPE_GUI_CLICK_MOVE,pt.x, pt.y, fingerID);
    }   
}