GPS星卫图及信噪比图的设计

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我是靠谱客的博主细腻小熊猫，最近开发中收集的这篇文章主要介绍GPS星卫图及信噪比图的设计，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

void FSpaceAnalyseDlg::OnPaint()
{
CPaintDC dc(this); // device context for painting
// TODO: 在此处添加消息处理程序代码
// 不为绘图消息调用 CDialog::OnPaint()
theApp.DrawBmpFormFile(dc.m_hDC, 0, 0, L"SpaceAnalyse.bmp");
//绘制空间分析示意图
//CClientDC dc(this);
//dc.SetPixel(120,120,RGB(0,0,0));
dc.Ellipse(60,60,180,180);//画圆
dc.Ellipse(80,80,160,160);
dc.Ellipse(100,100,140,140);
dc.MoveTo(60,120); //画水平线
dc.LineTo(180,120);
dc.MoveTo(120,60); //画垂线
dc.LineTo(120,180);
//绘制信噪比基准线
CPen pen(PS_SOLID,1,RGB(255,255,255));
dc.SelectObject(&pen);
dc.MoveTo(10,200);
dc.LineTo(230,200);
dc.MoveTo(10,230);
dc.LineTo(230,230);
dc.MoveTo(10,260);
dc.LineTo(230,260);

dc.SetTextColor(RGB(255,255,255));//设置字体颜色
dc.SetBkMode(TRANSPARENT);//设置背景透明
//显示N,E,S,W
CString label;
label = "N";
CRect rc1(110,45,130,60);
dc.DrawTextW(label,&rc1,DT_CENTER);
label = "E";
CRect rc2(180,110,200,130);
dc.DrawTextW(label,&rc2,DT_CENTER);
label = "S";
CRect rc3(110,180,130,200);
dc.DrawTextW(label,&rc3,DT_CENTER);
label = "W";
CRect rc4(40,110,60,130);
dc.DrawTextW(label,&rc4,DT_CENTER);

DisPlay();
}
void FSpaceAnalyseDlg::DisPlay()
{
//获取GPS位置
//获取app的FGPS
FGPS * pGps = ((CNavTongApp*)AfxGetApp())->getGPS();

//GPS打开的时候显示星位图
if (pGps->IsGpsOpen())
{
  GPS_POSITION position;
  double x[12],y[12];
  int r = 60;
  if (pGps->getGpsPosition(position) == ERROR_SUCCESS)
  {
   //获取卫星位置坐标
   for(int i = 0;i<12;i++)
   {
    if(position.rgdwSatellitesInViewAzimuth[i] > 0 && position.rgdwSatellitesInViewAzimuth[i] < 90)
    {
     x[i] = 120 + (60 * cos(position.rgdwSatellitesInViewElevation[i])) * cos(position.rgdwSatellitesInViewAzimuth[i]);
     y[i] = 120 + (60 * cos(position.rgdwSatellitesInViewElevation[i])) * sin(position.rgdwSatellitesInViewAzimuth[i]);
    }
    else if(position.rgdwSatellitesInViewAzimuth[i] >= 90 && position.rgdwSatellitesInViewAzimuth[i] < 180 )
    {
     x[i] = 120 + (60 * cos(position.rgdwSatellitesInViewElevation[i])) * cos(180 - position.rgdwSatellitesInViewAzimuth[i]);
     y[i] = 120 + (60 * cos(position.rgdwSatellitesInViewElevation[i])) * sin(180 - position.rgdwSatellitesInViewAzimuth[i]);
    }
    else if(position.rgdwSatellitesInViewAzimuth[i] >= 180 && position.rgdwSatellitesInViewAzimuth[i] < 270 )
    {
     x[i] = 120 + (60 * cos(position.rgdwSatellitesInViewElevation[i])) * cos(position.rgdwSatellitesInViewAzimuth[i] - 180);
     y[i] = 120 + (60 * cos(position.rgdwSatellitesInViewElevation[i])) * sin(position.rgdwSatellitesInViewAzimuth[i] - 180);
    }
    else
    {
     x[i] = 120 + (60 * cos(position.rgdwSatellitesInViewElevation[i])) * sin(position.rgdwSatellitesInViewAzimuth[i] - 270);
     y[i] = 120 + (60 * cos(position.rgdwSatellitesInViewElevation[i])) * cos(position.rgdwSatellitesInViewAzimuth[i] - 270);
    }
    //显示GPS卫星分布图
    CClientDC dc(this);
    dc.SelectStockObject(WHITE_BRUSH);
    CBrush cbBrush(RGB(255,0,0));
    CBrush *poldBrush = (CBrush*) dc.SelectObject(&cbBrush);
    dc.Ellipse(int(x[i] - 8),int(y[i] - 8),int(x[i] + 8),int(y[i] + 8));

    //显示GPS卫星信噪比
    double temp;
    temp = (60/50) * position.rgdwSatellitesInViewSignalToNoiseRatio[i];
    dc.Rectangle(10 + 15 * i ,int(260 - temp), 23 + 15 * i ,260);
    dc.SelectObject(poldBrush);

    //分别在二个区域显示GPS卫星编号
    dc.SetTextColor(COLORREF(RGB(0,255,0)));//设置字体颜色
    dc.SetBkMode(TRANSPARENT);//设置背景透明
    CRect rc1(int(x[i] - 8),int(y[i] + 8),int(x[i] + 8),int(y[i] + 20 ));
    CRect rc2(10 + 15 * i ,260, 23 + 15 * i,275);
    CString label;
    label.Format(_T("%d"),position.rgdwSatellitesInViewPRNs[i]);
    dc.DrawTextW(label,&rc1,DT_CENTER);
    dc.DrawTextW(label,&rc2,DT_CENTER);
   }
  }
  else
  {
   MessageBox(_T("信号不好，GPS获取不到数据！"));
  }
}
}