/// <summary>
/// Interpolates between two values using an enforced amount.
/// </summary>
public static float LerpExact(float a, float b, float amount)
{
if (!RangeF.Contains(0.0f, 1.0f, amount))
{
throw new ArithmeticException("Cannot interpolate with an amount outside the range of [0, 1].");
}
return((1.0f - amount) * a + amount * b);
}
public static ImageChannels FromImage(Bitmap image)
{
Grid <Color> pixels = ImageHelper.GetPixelData(image);
var channels = new ImageChannels(image.Width, image.Height);
channels.Red.SetEachValue((x, y) => RangeF.Convert(0, 255, 0, 1, pixels[x, y].R));
channels.Green.SetEachValue((x, y) => RangeF.Convert(0, 255, 0, 1, pixels[x, y].G));
channels.Blue.SetEachValue((x, y) => RangeF.Convert(0, 255, 0, 1, pixels[x, y].B));
return(channels);
}
private static ImmutableColor CreateFromChmx(float c, float h, float m, float x)
{
float rF = 0.00f;
float gF = 0.00f;
float bF = 0.00f;
if (RangeF.Contains(0.00f, 60.00f, h, true, false))
{
rF = c;
gF = x;
bF = 0;
}
else if (RangeF.Contains(60.00f, 120.00f, h, true, false))
{
rF = x;
gF = c;
bF = 0;
}
else if (RangeF.Contains(120.00f, 180.00f, h, true, false))
{
rF = 0;
gF = c;
bF = x;
}
else if (RangeF.Contains(180.00f, 240.00f, h, true, false))
{
rF = 0;
gF = x;
bF = c;
}
else if (RangeF.Contains(240.00f, 300.00f, h, true, false))
{
rF = x;
gF = 0;
bF = c;
}
else if (RangeF.Contains(300.00f, 360.00f, h, true, false))
{
rF = c;
gF = 0;
bF = x;
}
byte r = (byte)Math.Floor((rF + m) * 255);
byte g = (byte)Math.Floor((gF + m) * 255);
byte b = (byte)Math.Floor((bF + m) * 255);
return(new ImmutableColor(r, g, b));
}
public static ImmutableColor FromCmyk(float c, float m, float y, float k)
{
RangeF bounds = RangeF.Percent;
if (!bounds.All(c, m, y, k))
{
throw new ArgumentException("One of the specified float values are out of range.");
}
byte r = GetCmy(c, k);
byte g = GetCmy(m, k);
byte b = GetCmy(y, k);
return(new ImmutableColor(r, g, b));
}
public float Convert(RangeF range, float value) => Convert(range.Min, range.Max, Min, Max, value);
public static float Clamp(RangeF range, float value) => Clamp(range.Min, range.Max, value);
/// <summary>
/// Flattens the <see cref="RangeF"/> to whole numbers.
/// </summary>
public static RangeF Truncate(RangeF range)
=> new RangeF(MathF.Truncate(range.Min),
MathF.Truncate(range.Max),
range.InclusiveMin,
range.InclusiveMax);
public static float Convert(RangeF from, RangeF to, float value) => Convert(from.Min, from.Max, to.Min, to.Max, value);