Re: Real-Time Chart of Non-Real time Data

[User (Legacy)]

Hi Frank, 

Thanks for the quick reply. 

> 1) So is this a real-time time chart or not ? is the data being added 

using 

> COD_ADDPOINTS ? 

1) No, this is not a real-time chart. My application 

is animating prerecorded data in real-time. What I need to do 

is display this data in a chart and somehow indicate 

to the user where the current time is in the chart. 

I have no problem setting up the charts and filling them with data: 

   pChartFX->OpenDataEx((CfxCod) (COD_VALUES), 

m_pchtParameters->m_iNumSeries[iChartIndex]+1, 

m_pchtParameters->m_iMaxNumValues[iChartIndex]); 

    // set-up data series 

    int iSeriesIndex=0; 

    for (vector<CChartDataSeries>::iterator 

itchtdataSeries=m_chtdataCharts[iChartIndex].m_chtdataSeries.begin(); 

itchtdataSeries!=m_chtdataCharts[iChartIndex].m_chtdataSeries.end(); 

itchtdataSeries++,iSeriesIndex++) 

    { 

         for(int i=0;i<m_pchtParameters->m_iMaxNumValues[iChartIndex];i++) 

         { 

pChartFX->Series->Item[iSeriesIndex]->Yvalue[i]=itchtdataSeries->m_pdData[i] 

; 

         } 

    } 

   pChartFX->CloseData((CfxCod)(COD_VALUES|COD_SMOOTH)); 

The problem that I'm having is indicating on the chart where the current 

time is. 

> 2) Setting a constant line will cause the whole chart to redraw 

2) Is there some other method I can use to indicate the time position on the 

chart 

without having the whole chart redrawn? 

> 3) What do you mean by "the whole simulation grinds to a halt" ? does the 

> computer freezes or it just takes time because it is redrawing the chart ? 

> If the last, how many points are in this chart. 

3) It is taking too long to redraw the chart. At this point I using about 

1000 points 

per series and two or three series. 

I have tried using a limited window and scrolling, but this updates too slow 

also. 

I'm plotting all of the data to the chart and it does not change during 

operation. All 

I need to do is draw a line on the chart ,or indicate some how, where the 

current time is. 

Thanks, 

Steve