CHSV& nblend( CHSV& existing, const CHSV& overlay, fract8 amountOfOverlay, TGradientDirectionCode directionCode)
{
if( amountOfOverlay == 0) {
return existing;
}
if( amountOfOverlay == 255) {
existing = overlay;
return existing;
}
fract8 amountOfKeep = 256 - amountOfOverlay;
uint8_t huedelta8 = overlay.hue - existing.hue;
if( directionCode == SHORTEST_HUES ) {
directionCode = FORWARD_HUES;
if( huedelta8 > 127) {
directionCode = BACKWARD_HUES;
}
}
if( directionCode == LONGEST_HUES ) {
directionCode = FORWARD_HUES;
if( huedelta8 < 128) {
directionCode = BACKWARD_HUES;
}
}
if( directionCode == FORWARD_HUES) {
existing.hue = existing.hue + scale8( huedelta8, amountOfOverlay);
}
else /* directionCode == BACKWARD_HUES */
{
huedelta8 = -huedelta8;
existing.hue = existing.hue - scale8( huedelta8, amountOfOverlay);
}
existing.sat = scale8_LEAVING_R1_DIRTY( existing.sat, amountOfKeep)
+ scale8_LEAVING_R1_DIRTY( overlay.sat, amountOfOverlay);
existing.val = scale8_LEAVING_R1_DIRTY( existing.val, amountOfKeep)
+ scale8_LEAVING_R1_DIRTY( overlay.val, amountOfOverlay);
cleanup_R1();
return existing;
}
static int8_t __attribute__((always_inline)) lerp7by8( int8_t a, int8_t b, fract8 frac)
{
// int8_t delta = b - a;
// int16_t prod = (uint16_t)delta * (uint16_t)frac;
// int8_t scaled = prod >> 8;
// int8_t result = a + scaled;
// return result;
int8_t result;
if( b > a) {
uint8_t delta = b - a;
uint8_t scaled = scale8( delta, frac);
result = a + scaled;
} else {
uint8_t delta = a - b;
uint8_t scaled = scale8( delta, frac);
result = a - scaled;
}
return result;
}
void fadeUsingColor( CRGB* leds, uint16_t numLeds, const CRGB& colormask)
{
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);
}
}
// Fill the x/y array of 8-bit noise values using the inoise8 function.
void fillnoise8() {
// If we're runing at a low "speed", some 8-bit artifacts become visible
// from frame-to-frame. In order to reduce this, we can do some fast data-smoothing.
// The amount of data smoothing we're doing depends on "speed".
uint8_t dataSmoothing = 0;
if( speed < 50) {
dataSmoothing = 200 - (speed * 4);
}
for(int i = 0; i < MAP_WIDTH/2 + 1; i++) {
int ioffset = scale * i;
for(int j = 0; j < MAP_WIDTH/2 + 1; j++) {
int joffset = scale * j;
uint8_t data = inoise8(x + joffset,y + ioffset,z);
// The range of the inoise8 function is roughly 16-238.
// These two operations expand those values out to roughly 0..255
// You can comment them out if you want the raw noise data.
data = qsub8(data,16);
data = qadd8(data,scale8(data,39));
if( dataSmoothing ) {
uint8_t olddata = noise[i][j];
uint8_t newdata = scale8( olddata, dataSmoothing) + scale8( data, 256 - dataSmoothing);
data = newdata;
}
noise[i][j] = data;
}
}
z += speed;
// apply slow drift to X and Y, just for visual variation.
x += speed * xDrift / 8;
y -= speed * yDrift / 16;
}
void RandomWipe::animate(CRGB* now, const CRGB* last, const uint8_t n, const uint8_t f)
{
uint8_t k = scale8(f, n);
now[k] = _trgb;
}
