public static double GetBrightnessCurve(double percent, int example = 0)
{
// P1 = 0,0
// C1 = 0.49,0.06
// P2 = 1,1
// C2 = 0.44,0.98
double brightness;
// Some examples of calculating the brightness curve
switch (example)
{
case 0:
brightness = -3 * Math.Pow((percent - .66), 4) - 1.3653 * (percent - 1.029);
break;
case 1:
brightness = -5 * Math.Pow((percent - .79), 4) - 2.5 * (percent - 0.79);
break;
case 2:
brightness = -1.4 * Math.Pow((percent - 1), 12) - 1.37 * (percent - 1);
break;
case 3:
{
var points = new[]
{
new Point(1, 1),
new Point(0.44, 0.98),
new Point(0.49, 0.06),
new Point(0, 0)
};
brightness = Curves.GetBezierPoint(percent, points).Y;
}
break;
case 4:
{
var points = new[]
{
// \draw (0,0) .. controls (0.5,0.0) and (1,2.2) .. (1,0)
new Point(0.0, 0.0),
new Point(0.5, 0.0),
new Point(1.0, 2.2),
new Point(1.0, 0.0)
};
brightness = Curves.GetBezierPoint(percent, points).Y;
}
break;
case 5:
{
var points = new[]
{
new Point(0, 0),
new Point(0, 1.3),
new Point(1, 1.3),
new Point(1, 0)
};
brightness = Curves.GetBezierPoint(percent, points).Y;
}
break;
case 6:
{
// \draw (0,0) .. controls (0.6,0.1) and (1,2.2) .. (1,0);
var points = new[]
{
new Point(0.0, 0.0),
new Point(0.6, 0.1),
new Point(1.0, 2.2),
new Point(1.0, 0.0)
};
brightness = Curves.GetBezierPoint(percent, points).Y;
if (brightness > 1 || brightness < 0)
{
Debug.Print("Something went wrong...");
}
}
break;
case 7:
{
// \draw (1,0) .. controls (-0.3,0) and (0.2,1) .. (0,1);
var points = new[]
{
new Point(1, 0),
new Point(-0.3, 0),
new Point(0.2, 1),
new Point(0, 1)
};
brightness = Curves.GetBezierPoint(percent, points).Y;
}
break;
case 99:
{
var points = new[]
{
new Point(1, 0.75),
new Point(1, 1),
new Point(0.44, 0.98),
new Point(0.49, 0.06),
new Point(0, 0)
};
brightness = Curves.GetBezierPoint(percent, points).Y;
}
break;
default:
brightness = percent;
break;
}
if (brightness > 1)
{
brightness = 1;
}
if (brightness < 0)
{
brightness = 0;
}
return(brightness);
}
