protected Palette(
ColorWheelBase wheel
)
{
Debug.Assert(wheel != null);
m_colors = new ObservableCollection <PaletteColor>();
m_wheel = wheel;
}
public static DoubleColor AlterHue(
this DoubleColor c,
ColorWheelBase wheel,
double hue
)
{
AHSB src = c.ToAHSB();
AHSB dest = wheel.GetColor(hue).ToAHSB();
dest.Saturation = src.Saturation;
dest.Brightness = src.Brightness;
dest.Alpha = src.Alpha;
return(dest.Double());
}
///
/// <summary>
/// Generate palette by base color, schema and number of colors.
/// Number of colors should be more than 1</summary>
///
public static Palette Create(
ColorWheelBase wheel,
Color baseColor,
PaletteSchemaType schema = PaletteSchemaType.Complementary,
int colorCount = 5,
double fromSat = 1.0,
double toSat = 0.2,
double fromBri = 0.2,
double toBri = 0.9
)
{
double angle = 30;
double baseAngle = 0;
double alpha = baseColor.A / 255.0;
double incs = 0;
double incb = 0;
AHSB c;
int index = 0;
wheel = wheel ?? new RGBColorWheel();
baseAngle = wheel.GetAngle(baseColor.Double());
if (schema == PaletteSchemaType.Complementary)
{
angle = 180.0;
}
else if (schema == PaletteSchemaType.Quadrants)
{
angle = 90.0;
}
else if (schema == PaletteSchemaType.Triad)
{
angle = 120.0;
}
Palette p = new Palette(wheel)
{
Schema = schema,
Angle = angle
};
if (colorCount > 1)
{
incs = (toSat - fromSat) / (colorCount - 1);
incb = (toBri - fromBri) / (colorCount - 1);
}
for (int i = 0; i < colorCount; ++i)
{
switch (p.Schema)
{
case PaletteSchemaType.Monochromatic:
break;
case PaletteSchemaType.Quadrants:
case PaletteSchemaType.Tetrads:
index = i % 4;
break;
case PaletteSchemaType.Custom:
case PaletteSchemaType.SplitComplementary:
case PaletteSchemaType.SplitAnalogous:
case PaletteSchemaType.Triad:
index = i % 3;
break;
case PaletteSchemaType.Complementary:
case PaletteSchemaType.Analogous:
index = i % 2;
break;
default:
throw new ArgumentException();
}
c = new AHSB(alpha, baseAngle, fromSat, fromBri);
fromSat = AHSB.Fix(fromSat + incs);
fromBri = AHSB.Fix(fromBri + incb);
p.Colors.Add(new PaletteColor()
{
Name = i.ToString(),
VectorIndex = index,
Color = c
});
}
p.BaseAngle = baseAngle;
return(p);
}
