public static FactorFormula ExponentialAttenuation(SpotEntity spot)
{
return(p =>
{
double d = spot.GetDistTo(p);
return Math.Pow(spot.Coefficient, 1 - d / spot.ServingRadius);
});
}
public static FactorFormula LinearToZeroInRadius(SpotEntity spot)
{
return(p =>
{
double d = spot.GetDistTo(p);
return (d > spot.ServingRadius) ? 0 : spot.Coefficient *(1 - d / spot.ServingRadius);
});
}
public static FactorFormula ZeroOne(SpotEntity spot)
{
return(p =>
{
double d = spot.GetDistTo(p);
return (d > spot.ServingRadius) ? 0 : spot.Coefficient;
});
}
public static SpotEntity addspot(double x, double y)
{
var spot = new SpotEntity {
Position = new Geometry.Point2D(x, y)
};
city.CitySpots.Add(spot);
return(spot);
}
public void AddSpot(CityEntityType type, Point2D pos)
{
SpotEntity spot = new SpotEntity(type);
spot.Position = pos;
spot.ServingRadius = 600.0;
spot.Coefficient = 1200.0;
_cityModel.CitySpots.Add(spot);
_cityModel.Factors.Add(spot);
}
public static FactorFormula InverseSquare(SpotEntity spot, double maxValue = double.MaxValue)
{
return(p =>
{
double d = spot.GetDistTo(p);
double v = spot.Coefficient / d / d;
if (v > 0)
{
return v > maxValue ? maxValue : v;
}
else
{
return v < -maxValue ? -maxValue : v;
}
});
}
public override void MouseHoverHandler(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left) // Take care: this happens before MouseClick
{
// Move spot
if (_hover != null)
{
Viewer.Current.Canvas.Cursor = Cursors.Hand;
_hover.Position = DisplayManager.Current.CityCoordinate(e.X, e.Y);
ValueBuffer.UpdateValues();
Viewer.Current.Canvas.Invalidate();
}
}
else if (e.Button == MouseButtons.None)
{
// Detect spot
if (TaskPanel.Current.cbShowSpot.Checked)
{
SpotEntity temp = _hover;
_hover = DisplayManager.Current.DetectSpotHover(e.X, e.Y);
if (_hover != temp)
{
Viewer.Current.Canvas.Invalidate();
}
if (_hover != null)
{
Viewer.Current.Canvas.Cursor = Cursors.Hand;
}
else if (CanvasWindow.Current.IsDragging)
{
Viewer.Current.Canvas.Cursor = Cursors.SizeAll;
}
else
{
Viewer.Current.Canvas.Cursor = Cursors.Default;
}
}
}
}
public void RemoveSpot(SpotEntity spot)
{
_cityModel.CitySpots.Remove(spot);
_cityModel.Factors.Remove(_cityModel.Factors.Single(x => (x as SpotEntity).Properties == spot.Properties)); // 注意：这只是一个引用比较 mod 20110801
}