📄 mapx开发目标轨迹显示核心代码(vc++)[开发源代码]-gis公园.htm
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Symbols");//设置符号feature使用的字体<BR> m_objLayer.GetStyle().SetSymbolCharacter(53);//设置符号feature使用的字符<BR> m_objLayer.GetStyle().SetSymbolFontColor(RGB(255,0,0));//设置符号feature使用的颜色<BR> m_objLayer.GetStyle().SetLineWidth(1);//设置线形feature的线宽<BR> m_objLayer.SetDrawLabelsAfter(TRUE);//在所有图层绘制完后再绘制标注<BR>3
创建目标轨迹层<BR> m_traceLayer = m_ctrlMapX.GetLayers().CreateLayer("轨迹",NULL, 2,
32);<BR> m_ctrlMapX.GetLayers().SetAnimationLayer(m_traceLayer);<BR> m_traceLayer.SetSelectable(FALSE);<BR> m_traceLayer.SetDrawLabelsAfter(TRUE);//影响标注刷新的关键</FONT></P>
<P><FONT face=Verdana>4 响应OnDrawUserLayer绘制比例尺图层</FONT></P>
<P><FONT face=Verdana>5 定时器中改变目标位置</FONT></P>
<P><FONT face=Verdana>6
刷新电子地图<BR> m_objLayer.BeginAccess(miAccessReadWrite);//大大减少ＣＰＵ开销<BR> m_traceLayer.BeginAccess(miAccessReadWrite);//大大减少ＣＰＵ开销<BR> for(int
i=0;i<MAXNUMINEMAP;
i++)<BR> {<BR> //设定目标位置<BR> sObjectInEMap[i].ft.GetPoint().Set(sGISPoint[i][0].x,
sGISPoint[i][0].y);<BR> sObjectInEMap[i].ft.Update();</FONT></P>
<P><FONT
face=Verdana> //设置目标轨迹<BR> //为空的时候创建目标轨迹对象<BR> if
(m_objTrackFt[i]==NULL)<BR> {<BR> CMapXFeature
ft;<BR> ft.CreateDispatch(ft.GetClsid());<BR> ft.Attach(m_ctrlMapX.GetDispatch(FALSE));<BR> ft.SetType(miFeatureTypeLine);<BR> ft.GetStyle().SetLineColor(colors[i%12]);<BR> ft.GetStyle().SetLineStyle(1);//77-铁轨(参考帮助)<BR> ft.GetStyle().SetLineWidth(2);<BR> CMapXPoints pts;<BR> pts.CreateDispatch(pts.GetClsid());<BR> //加入坐标数据<BR> pts.AddXY(sGISPoint[i][1].x,
sGISPoint[i][1].y);<BR> pts.AddXY(sGISPoint[i][0].x,
sGISPoint[i][0].y);<BR> ft.GetParts().Add(pts);<BR> //加入到目标图层<BR> m_objTrackFt[i]
=
m_traceLayer.AddFeature((LPDISPATCH)ft);<BR> }<BR> else<BR> {<BR> //更新目标轨迹对象<BR> m_objTrackFt[i].GetParts().Item(1).AddXY(sGISPoint[i][0].x,
sGISPoint[i][0].y);<BR> m_objTrackFt[i].Update();<BR> }<BR> sGISPoint[i][1]
=
sGISPoint[i][0];<BR> }<BR> m_traceLayer.EndAccess();<BR> m_objLayer.EndAccess();</FONT></P></DIV><BR><BR><STRONG><FONT
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