PressureMeter.C

00001 
00002 #include "GUI/PressureMeter.H"
00003 #include "Image/PixelsTypes.H"
00004 
00005 PressureMeter::PressureMeter(int width, int height):
00006   itsWidth(width),
00007   itsHeight(height)
00008 {
00009 }
00010 
00011 Image<PixRGB<byte> > PressureMeter::render(int p)
00012 {
00013   itsPressureHist.push_front(p);
00014   if(itsPressureHist.size() > 10)
00015     itsPressureHist.pop_back();
00016 
00017   Image<PixRGB<byte> > pressureImage(itsWidth,itsHeight,ZEROS);
00018 
00019   drawCircle(pressureImage,Point2D<int>(itsWidth/2,itsHeight/2), .9*std::min(itsWidth,itsHeight)/2, PixRGB<byte>(0,0,255));
00020   int avgPressure = 0;
00021 
00022   std::list<int>::reverse_iterator it = itsPressureHist.rbegin();
00023   for(;it != itsPressureHist.rend(); ++it)
00024     {
00025       avgPressure += *it;
00026     }
00027   if(itsPressureHist.size() > 0)
00028     avgPressure /= itsPressureHist.size();
00029 
00030   float drawPercentage = (float)(avgPressure) / 5000.0;
00031 
00032   int x = (int)(.9*std::min(itsWidth,itsHeight)/2*cos((drawPercentage*360)*(M_PI/180))); //shift by 90 so that 0 is up
00033   int y = (int)(.9*std::min(itsWidth,itsHeight)/2*sin((drawPercentage*360)*(M_PI/180)));
00034   drawArrow(pressureImage, Point2D<int>(itsWidth/2,itsHeight/2), Point2D<int>(itsWidth/2+x,itsHeight/2+y), PixRGB<byte>(0,255,0));
00035 
00036   return pressureImage;
00037 }