69 lines
1.0 KiB
C++
Executable File
69 lines
1.0 KiB
C++
Executable File
#ifndef FADER_H
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#define FADER_H
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#include "ESP8266lib/ext/led/WS2812B.h"
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/** fade between two colors */
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class FadeBetween {
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Color c1;
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Color c2;
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int pos;
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int speed;
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int dir;
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public:
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/** ctor */
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FadeBetween() {
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restart();
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}
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void setColor1(Color c1) {
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this->c1 = c1;
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}
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void setColor2(Color c2) {
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this->c2 = c2;
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}
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void restart() {
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pos = 0;
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speed = 64;
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dir = 0;
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}
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void update() {
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if (dir == 0) {
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++pos;
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if (pos == speed) {dir = 1;}
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} else {
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--pos;
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if (pos == 0) {dir = 0;}
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}
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}
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Color getCurrent() const {
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const int fac0 = pos;
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const int fac1 = speed - fac0;
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Color c;
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c.r = clamp( (c1.r * fac0 + c2.r * fac1) / speed );
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c.g = clamp( (c1.g * fac0 + c2.g * fac1) / speed );
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c.b = clamp( (c1.b * fac0 + c2.b * fac1) / speed );
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return c;
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}
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private:
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static inline uint8_t clamp(int val) {
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if (val > 255) {return 255;}
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if (val < 0) {return 0;}
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return val;
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}
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};
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#endif // FADER_H
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