fadeUsingColor()

void fadeUsingColor	(	CRGB *	leds,
		uint16_t	numLeds,
		const CRGB &	colormask )

Reduce the brightness of an array of pixels as thought it were seen through a transparent filter with the specified color.

For example, if the colormask if CRGB(200, 100, 50), then the pixels' red will be faded to 200/256ths, their green to 100/256ths, and their blue to 50/256ths. This particular example will give a "hot fade" look, with white fading to yellow, then red, then black. You can also use colormasks like CRGB::Blue to zero out the red and green elements, leaving blue (largely) the same.

Parameters

leds	a pointer to the LED array to fade
numLeds	the number of LEDs to fade
colormask	the color mask to fade with

Definition at line 288 of file colorutils.cpp.

{
    uint8_t fr, fg, fb;
    fr = colormask.r;
    fg = colormask.g;
    fb = colormask.b;
 
    for( uint16_t i = 0; i < numLeds; ++i) {
        leds[i].r = scale8_LEAVING_R1_DIRTY( leds[i].r, fr);
        leds[i].g = scale8_LEAVING_R1_DIRTY( leds[i].g, fg);
        leds[i].b = scale8                 ( leds[i].b, fb);
    }
}

References leds, scale8(), and scale8_LEAVING_R1_DIRTY().

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