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RGBMood.cpp
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RGBMood.cpp
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#include "RGBMood.h"
// Dim curve
// Used to make 'dimming' look more natural.
uint8_t dc[256] = {
0, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6,
6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8,
8, 8, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 11, 11, 11,
11, 11, 12, 12, 12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 14, 15,
15, 15, 16, 16, 16, 16, 17, 17, 17, 18, 18, 18, 19, 19, 19, 20,
20, 20, 21, 21, 22, 22, 22, 23, 23, 24, 24, 25, 25, 25, 26, 26,
27, 27, 28, 28, 29, 29, 30, 30, 31, 32, 32, 33, 33, 34, 35, 35,
36, 36, 37, 38, 38, 39, 40, 40, 41, 42, 43, 43, 44, 45, 46, 47,
48, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62,
63, 64, 65, 66, 68, 69, 70, 71, 73, 74, 75, 76, 78, 79, 81, 82,
83, 85, 86, 88, 90, 91, 93, 94, 96, 98, 99, 101, 103, 105, 107, 109,
110, 112, 114, 116, 118, 121, 123, 125, 127, 129, 132, 134, 136, 139, 141, 144,
146, 149, 151, 154, 157, 159, 162, 165, 168, 171, 174, 177, 180, 183, 186, 190,
193, 196, 200, 203, 207, 211, 214, 218, 222, 226, 230, 234, 238, 242, 248, 255,
};
// Constructor. Start with leds off.
RGBMood::RGBMood(uint8_t rp, uint8_t gp, uint8_t bp)
{
mode_ = FIX_MODE; // Stand still
pins_[0] = rp;
pins_[1] = gp;
pins_[2] = bp;
current_RGB_color_[0] = 0;
current_RGB_color_[1] = 0;
current_RGB_color_[2] = 0;
current_HSB_color_[0] = 0;
current_HSB_color_[1] = 0;
current_HSB_color_[2] = 0;
fading_max_steps_ = 200;
fading_step_time_ = 50;
holding_color_ = 1000;
fading_ = false;
last_update_ = millis();
}
/*
Change instantly the LED colors.
@param h The hue (0..65535) (Will be % 360)
@param s The saturation value (0..255)
@param b The brightness (0..255)
*/
void RGBMood::setHSB(uint16_t h, uint16_t s, uint16_t b) {
current_HSB_color_[0] = constrain(h % 360, 0, 360);
current_HSB_color_[1] = constrain(s, 0, 255);
current_HSB_color_[2] = constrain(b, 0, 255);
hsb2rgb(current_HSB_color_[0], current_HSB_color_[1], current_HSB_color_[2], current_RGB_color_[0], current_RGB_color_[1], current_RGB_color_[2]);
fading_ = false;
}
/*
Change instantly the LED colors.
@param r The red (0..255)
@param g The green (0..255)
@param b The blue (0..255)
*/
void RGBMood::setRGB(uint16_t r, uint16_t g, uint16_t b) {
current_RGB_color_[0] = constrain(r, 0, 255);
current_RGB_color_[1] = constrain(g, 0, 255);
current_RGB_color_[2] = constrain(b, 0, 255);
fading_ = false;
}
void RGBMood::setRGB(uint32_t color) {
setRGB((color & 0xFF0000) >> 16, (color & 0x00FF00) >> 8, color & 0x0000FF);
}
/*
Fade from current color to the one provided.
@param h The hue (0..65535) (Will be % 360)
@param s The saturation value (0..255)
@param b The brightness (0..255)
@param shortest Hue takes the shortest path (going up or down)
*/
void RGBMood::fadeHSB(uint16_t h, uint16_t s, uint16_t b, bool shortest) {
initial_color_[0] = current_HSB_color_[0];
initial_color_[1] = current_HSB_color_[1];
initial_color_[2] = current_HSB_color_[2];
if (shortest) {
h = h % 360;
// We take the shortest way! (0 == 360)
// Example, if we fade from 10 to h=350, better fade from 370 to h=350.
// if we fade from 350 to h=10, better fade from 350 to h=370.
// 10 -> 350
if (initial_color_[0] < h) {
if (h - initial_color_[0] > (initial_color_[0] + 360) - h)
initial_color_[0] += 360;
}
else if (initial_color_[0] > h) { // 350 -> 10
if (initial_color_[0] - h > (h + 360) - initial_color_[0])
h += 360;
}
}
target_color_[0] = h;
target_color_[1] = s;
target_color_[2] = b;
fading_ = true;
fading_step_ = 0;
fading_in_hsb_ = true;
}
/*
Fade from current color to the one provided.
@param r The red (0..255)
@param g The green (0..255)
@param b The blue (0..255)
*/
void RGBMood::fadeRGB(uint16_t r, uint16_t g, uint16_t b) {
initial_color_[0] = current_RGB_color_[0];
initial_color_[1] = current_RGB_color_[1];
initial_color_[2] = current_RGB_color_[2];
target_color_[0] = r;
target_color_[1] = g;
target_color_[2] = b;
fading_ = true;
fading_step_ = 0;
fading_in_hsb_ = false;
}
void RGBMood::fadeRGB(uint32_t color) {
fadeRGB((color & 0xFF0000) >> 16, (color & 0x00FF00) >> 8, color & 0x0000FF);
}
/*
This function needs to be called in the loop function.
*/
void RGBMood::tick() {
unsigned long current_millis = millis();
if (fading_) {
// Enough time since the last step ?
if (current_millis - last_update_ >= fading_step_time_) {
fading_step_++;
fade();
if (fading_step_ >= fading_max_steps_) {
fading_ = false;
if (fading_in_hsb_) {
current_HSB_color_[0] = target_color_[0] % 360;
current_HSB_color_[1] = target_color_[1];
current_HSB_color_[2] = target_color_[2];
}
}
last_update_ = current_millis;
}
}
else if (mode_ != FIX_MODE) {
// We are not fading.
// If mode_ == 0, we do nothing.
if (current_millis - last_update_ >= holding_color_) {
last_update_ = current_millis;
switch(mode_) {
case RANDOM_HUE_MODE:
fadeHSB(random(0, 360), current_HSB_color_[1], current_HSB_color_[2]);
break;
case RAINBOW_HUE_MODE:
fadeHSB(360, current_HSB_color_[1], current_HSB_color_[2], false);
break;
case RED_MODE:
fadeHSB(random(335, 400), random(190, 255), random(120, 255));
break;
case BLUE_MODE:
fadeHSB(random(160, 275), random(190, 255), random(120, 255));
break;
case GREEN_MODE:
fadeHSB(random(72, 160), random(190, 255), random(120, 255));
break;
case FIRE_MODE:
setHSB(random(345, 435), random(190, 255), random(120,255));
holding_color_ = random(10, 500);
break;
}
}
}
if (pins_[0] > 0)
{
analogWrite(pins_[0], current_RGB_color_[0]);
analogWrite(pins_[1], current_RGB_color_[1]);
analogWrite(pins_[2], current_RGB_color_[2]);
}
}
/*
Convert a HSB color to RGB
This function is used internally but may be used by the end user too. (public).
@param h The hue (0..65535) (Will be % 360)
@param s The saturation value (0..255)
@param b The brightness (0..255)
*/
void RGBMood::hsb2rgb(uint16_t hue, uint16_t sat, uint16_t val, uint16_t& red, uint16_t& green, uint16_t& blue) {
val = dc[val];
sat = 255-dc[255-sat];
hue = hue % 360;
int r;
int g;
int b;
int base;
if (sat == 0) { // Acromatic color (gray). Hue doesn't mind.
red = val;
green = val;
blue = val;
} else {
base = ((255 - sat) * val)>>8;
switch(hue/60) {
case 0:
r = val;
g = (((val-base)*hue)/60)+base;
b = base;
break;
case 1:
r = (((val-base)*(60-(hue%60)))/60)+base;
g = val;
b = base;
break;
case 2:
r = base;
g = val;
b = (((val-base)*(hue%60))/60)+base;
break;
case 3:
r = base;
g = (((val-base)*(60-(hue%60)))/60)+base;
b = val;
break;
case 4:
r = (((val-base)*(hue%60))/60)+base;
g = base;
b = val;
break;
case 5:
r = val;
g = base;
b = (((val-base)*(60-(hue%60)))/60)+base;
break;
}
red = r;
green = g;
blue = b;
}
}
/* Private functions
------------------------------------------------------------ */
/*
This function is used internaly to do the fading between colors.
*/
void RGBMood::fade()
{
if (fading_in_hsb_) {
current_HSB_color_[0] = (uint16_t)(initial_color_[0] - (fading_step_*((initial_color_[0]-(float)target_color_[0])/fading_max_steps_)));
current_HSB_color_[1] = (uint16_t)(initial_color_[1] - (fading_step_*((initial_color_[1]-(float)target_color_[1])/fading_max_steps_)));
current_HSB_color_[2] = (uint16_t)(initial_color_[2] - (fading_step_*((initial_color_[2]-(float)target_color_[2])/fading_max_steps_)));
hsb2rgb(current_HSB_color_[0], current_HSB_color_[1], current_HSB_color_[2], current_RGB_color_[0], current_RGB_color_[1], current_RGB_color_[2]);
}
else {
current_RGB_color_[0] = (uint16_t)(initial_color_[0] - (fading_step_*((initial_color_[0]-(float)target_color_[0])/fading_max_steps_)));
current_RGB_color_[1] = (uint16_t)(initial_color_[1] - (fading_step_*((initial_color_[1]-(float)target_color_[1])/fading_max_steps_)));
current_RGB_color_[2] = (uint16_t)(initial_color_[2] - (fading_step_*((initial_color_[2]-(float)target_color_[2])/fading_max_steps_)));
}
}