COLORHSB
- specify color using Hue-Saturation-Brightness
|
Miscellaneous functions
(AFL 2.80) |
| SYNTAX |
ColorHSB( hue, saturation, brightness ) |
| RETURNS |
NUMBER |
| FUNCTION |
The function allows to specify color out of 16 million color (24 bit) palette using Hue, Saturation and Brightness parameters.
The return value is a number that can be used in Plot, PlotOHLC, PlotForeign, AddColumn, AddTextColumn functions to specify chart or column color.
Parameters:
-
hue - represents gradation of color within the optical spectrum (as in rainbow)
-
saturation represents "vibrancy" of the color
-
brightness represents brightness.
Each parameter ranges from 0 to 255, where 0 represents 0% saturation/brightness or 0 degree hue in HSV color wheel,
and 255 represents 100% saturation/brightness or 360degrees hue in HSV color wheel.
When you modify hue from 0 to 255 you will see consecutive
rainbow colors starting from red, through yellow and green to blue and violet.
For more information about HSB color space please read:
http://en.wikipedia.org/wiki/HSB_color_space |
| EXAMPLE |
// Example 1:
// 3-d multicolor multiple moving average cloud chart
side = 1;
increment = Param("Increment",2, 1, 10, 1 );
for( i = 10;
i < 80; i = i + increment
)
{
up = MA( C,
i );
down = MA( C,
i + increment );
if( ParamToggle("3D
effect?", "No|Yes" )
)
side = IIf(up<=down AND Ref(
up<=down, 1 ), 1, 0.6 );
PlotOHLC( up,up,down,down, "MA"+i, ColorHSB( 3*(i
- 10),
Param("Saturation", 128, 0, 255 ),
side * Param("Brightness", 255, 0, 255 )
), styleCloud | styleNoLabel );
}
// Example 2:
///////
//Color-parade exploration
Filter=1;
for( i = 0;
i < 256; i = i + 16 )
AddColumn( C, "C", 1.2, colorDefault, ColorHSB(
( BarIndex() + i ) % 256, 255-i, 255 )
); |
| SEE ALSO |
ColorRGB() function , PLOT() function , AddColumn() function |
References:
The ColorHSB function is used in the following formulas
in AFL on-line library:
|
