internal CoordinateSystem coordinateSystem; //坐标系
protected GraphicTrackDisplayer(Panel holder) : base(holder)
{
InitializeDirect2D(holder); //初始化direct2d
drawArea = new Rect(0, 0, holder.Width, holder.Height);
distance = 5000;
// ReSharper disable once VirtualMemberCallInConstructor
coordinateSystem = CreateCoordinateSystem(); //最先创建坐标系
background = CreateBackground(); //创建背景
antenna = CreateAntenna(); //创建天线
}
public override void Draw(Bitmap bmp, Rectangle displayArea, float beginAngle, PointF originalPoint)
{
Graphics drawer = Graphics.FromImage(bmp);
//0度线
float degree = -beginAngle;
degree = degree % 360;
float x = originalPoint.X + ((float)displayArea.Width / 2) * (float)Math.Sin(GraphicTrackDisplayerBackground.DegreeToRadian(degree));
float y = originalPoint.Y - ((float)displayArea.Height / 2) * (float)Math.Cos(GraphicTrackDisplayerBackground.DegreeToRadian(degree));
drawer.DrawLine(ZeroDegreeLinePen, originalPoint, new Point((int)x, (int)y)); //画线
}
