public static RPoint ToUnit(PointF screenpoint, UcMapControl mapCtrl)
{
float panoffsetX = mapCtrl.m_panOffset.X + mapCtrl.m_dragOffset.X;
float panoffsetY = mapCtrl.m_panOffset.Y + mapCtrl.m_dragOffset.Y;
float xpos = (screenpoint.X - panoffsetX) / (m_screenResolution * mapCtrl.Zoom);
float ypos = mapCtrl.ScreenHeight() - ((screenpoint.Y - panoffsetY)) / (m_screenResolution * mapCtrl.Zoom);
return(new RPoint(xpos, ypos, 0));
}
public static PointF ToScreen(RPoint pt, UcMapControl mapCtrl)
{
PointF transformedPoint = new PointF((float)pt.X, (float)pt.Y);
transformedPoint.Y = mapCtrl.ScreenHeight() - transformedPoint.Y; //将Unit坐标系转换为屏幕坐标系，Y轴反向，此时Y坐标为屏幕坐标系坐标
transformedPoint.Y *= m_screenResolution * mapCtrl.Zoom; //相对于屏幕原点放大
transformedPoint.X *= m_screenResolution * mapCtrl.Zoom;
transformedPoint.X += mapCtrl.m_panOffset.X + mapCtrl.m_dragOffset.X;
transformedPoint.Y += mapCtrl.m_panOffset.Y + mapCtrl.m_dragOffset.Y;
return(transformedPoint);
}
public void StartDrawing(UcMapControl mapCtrl)
{
if (m_staticImage == null)
{
cliprectangle = mapCtrl.ClientRectangle;
m_staticImage = new Bitmap(cliprectangle.Width, cliprectangle.Height);
// m_staticImage.Save("D:\\a.png", ImageFormat.Png);
m_staticDirty = true;
}
System.Drawing.Drawing2D.SmoothingMode m_smoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighSpeed;
//绘制在背景图片上
BitMapGc = Graphics.FromImage(m_staticImage);
BitMapGc.SmoothingMode = m_smoothingMode;
BitMapGc.Clear(Color.White);
//m_model.BackgroundLayer.Draw(dcStatic, r);
//if (m_model.GridLayer.Enabled)
// m_model.GridLayer.Draw(dcStatic, r);
//绘制十字丝
RPoint rCenterPoint = new RPoint(0, 0, 0);
PointF nullPoint = Transform.ToScreen(rCenterPoint, mapCtrl);
BitMapGc.DrawLine(Pens.Blue, nullPoint.X - 10, nullPoint.Y, nullPoint.X + 10, nullPoint.Y);
BitMapGc.DrawLine(Pens.Blue, nullPoint.X, nullPoint.Y - 10, nullPoint.X, nullPoint.Y + 10);
if (m_staticDirty)
{
m_staticDirty = false;
List <ILayer> layers = mapCtrl.mMap.Layers;
for (int layerindex = layers.Count - 1; layerindex >= 0; layerindex--)
{
if (layers[layerindex].Visible)
{
layers[layerindex].Draw(this);
}
}
}
if (NewObject != null)
{
if (NewObject is Polygon)
{
SolidBrush brush = new SolidBrush(Color.Blue);
SolidBrush brush2 = new SolidBrush(Color.Pink);
Pen pen = new Pen(brush2);
DrawPolygon2(BitMapGc, NewObject as Polygon, brush, pen, false);
}
}
BitMapGc.Dispose();
}
//将屏幕距离计算为Zoom等级下的地图距离
public static double ToUnit(float screenvalue, UcMapControl mapCtrl)
{
return((double)screenvalue / (double)(m_screenResolution * mapCtrl.Zoom));
}
