//计算总的瓦片数
private void initTask(int zoomIndex)
{
mZ = zoomIndex;
mLeftBottomTile = MapTool.lngLatToTile(mLeftBottomPoint.lng, mLeftBottomPoint.lat, mZoomArray[mZ]);
mRightTopTile = MapTool.lngLatToTile(mrightTopPoint.lng, mrightTopPoint.lat, mZoomArray[mZ]);
mX = mLeftBottomTile.x;
mY = mLeftBottomTile.y;
}
static public PointF lngLatToPoint(double lng, double lat)
{
PointGeo pt = new PointGeo();
pt.lng = MapTool.ft(lng, -180, 180); // lng: 120.26007
pt.lat = MapTool.lt(lat, -74, 74); // lat: 31.554487
//b = new F(a.lng, a.lat); // b: lat: 31.554487 lng: 120.26007
double[] c = null;
//北纬
for (int d = 0; d < MapTool.Wm.Length; d++)
{
if (pt.lat >= MapTool.Wm[d])
{
// Wm: [75, 60, 45, 30, 15, 0] （常量）
c = MapTool.bv[d]; // bv: 10*6的二维数组（常量）
break;
}
}
//南纬
if (c == null || c.Length <= 0)
{
for (int d = MapTool.Wm.Length - 1; 0 <= d; d--)
{
if (pt.lat <= -MapTool.Wm[d])
{
c = MapTool.bv[d];
break;
}
}
}
PointF fpt = MapTool.Sx(pt, c); //a: lat: 31.554487 lng: 120.26007, c = this.bv[d]; (d = 3)
return(new PointF(Convert.ToDouble(fpt.x.ToString("0.00")), Convert.ToDouble(fpt.y.ToString("0.00"))));
//DecimalFormat df = new DecimalFormat("#.00");
//return new PointF(Double.parseDouble(df.format(fpt.x)), Double.parseDouble(df.format(fpt.y))); // a: lat: 3682405.23 lng: 13387435.42
}