public static Action <double, double> OfDouble(Action <double, double> h, double scale)
{
Action <int, int> u = NumericEmitter.Of(
(x, y) =>
{
h(x * scale, y * scale);
}
);
return
((x, y) =>
{
u(Convert.ToInt32(x / scale), Convert.ToInt32(y / scale));
});
}
public static NumericEmitter Of(Action<int, int> Output)
{
// we could apply a rule which says
// if distance is too far just teleport to it without animating
// we are using sliding target to avoid single vector movement between events
const int DefaultFrameRate = 1000 / 30;
const double DefaultDivider = 6;
const int DefaultEndConditionDelta = 2;
var n = new NumericEmitter();
n.Output = Output;
double nx = 0;
double ny = 0;
double tx = 0;
double ty = 0;
bool dirty = false;
#region GetDistance
Func<double, double, double> GetDistance =
(dx, dy) =>
{
return Math.Sqrt(dx * dx + dy * dy);
};
#endregion
var Stop = default(Action);
n.Input =
(x, y) =>
{
tx = x;
ty = y;
if (!dirty)
{
dirty = true;
nx = tx;
ny = ty;
n.Output(
x,
y
);
if (n.InputComplete != null)
n.InputComplete();
return;
}
if (Stop == null)
Stop = DefaultFrameRate.AtInterval(
delegate
{
var dx = tx - nx;
var dy = ty - ny;
var TriggerInputComplete = false;
if (GetDistance(dx, dy) < DefaultEndConditionDelta)
{
Stop();
Stop = null;
TriggerInputComplete = true;
nx = tx;
ny = ty;
}
else
{
nx += dx / DefaultDivider;
ny += dy / DefaultDivider;
}
n.Output(
Convert.ToInt32(nx),
Convert.ToInt32(ny)
);
if (TriggerInputComplete)
{
if (n.InputComplete != null)
n.InputComplete();
}
}
).Stop;
};
return n;
}
public static NumericEmitter Of(Action <int, int> Output)
{
// we could apply a rule which says
// if distance is too far just teleport to it without animating
// we are using sliding target to avoid single vector movement between events
const int DefaultFrameRate = 1000 / 30;
const double DefaultDivider = 6;
const int DefaultEndConditionDelta = 2;
var n = new NumericEmitter();
n.Output = Output;
double nx = 0;
double ny = 0;
double tx = 0;
double ty = 0;
bool dirty = false;
#region GetDistance
Func <double, double, double> GetDistance =
(dx, dy) =>
{
return(Math.Sqrt(dx * dx + dy * dy));
};
#endregion
var Stop = default(Action);
n.Input =
(x, y) =>
{
tx = x;
ty = y;
if (!dirty)
{
dirty = true;
nx = tx;
ny = ty;
n.Output(
x,
y
);
if (n.InputComplete != null)
{
n.InputComplete();
}
return;
}
if (Stop == null)
{
Stop = DefaultFrameRate.AtInterval(
delegate
{
var dx = tx - nx;
var dy = ty - ny;
var TriggerInputComplete = false;
if (GetDistance(dx, dy) < DefaultEndConditionDelta)
{
Stop();
Stop = null;
TriggerInputComplete = true;
nx = tx;
ny = ty;
}
else
{
nx += dx / DefaultDivider;
ny += dy / DefaultDivider;
}
n.Output(
Convert.ToInt32(nx),
Convert.ToInt32(ny)
);
if (TriggerInputComplete)
{
if (n.InputComplete != null)
{
n.InputComplete();
}
}
}
).Stop;
}
};
return(n);
}
