//---bof---RGBL-Analog Preamble
//RGB LED pins
int ledAnalogOne[] = {3, 5, 6}; //the three pins of the first analog LED 3 = redPin, 5 = greenPin, 6 = bluePin
//These pins must be PWM
int ledAnalogTwo[] = {9, 10, 11}; //the three pins of the second analog LED 9 = redPin, 10 = greenPin, 11 = bluePin
//These pins must be PWM

//Defined Colors (different RGB (red, green, blue) values for colors
//(to add your own ie. fuscia experiment and then add to the list)
const byte RED[] = {255, 0, 0};
const byte ORANGE[] = {83, 4, 0};
const byte YELLOW[] = {255, 255, 0};
const byte GREEN[] = {0, 255, 0};
const byte BLUE[] = {0, 0, 255};
const byte INDIGO[] = {4, 0, 19};
const byte VIOLET[] =
{23, 0, 22};
const byte CYAN[] = {0, 255, 255};
const byte MAGENTA[] = {255, 0, 255};
const byte WHITE[] = {255, 255, 255};
const byte BLACK[] = {0, 0, 0};
const byte PINK[] = {158, 4, 79};

//---eof---RGBL-Analog Preamble

void setup(){
  for(int i = 0; i < 3; i++){
    pinMode(ledAnalogOne[i], OUTPUT);
    //Set the three LED pins as outputs
    pinMode(ledAnalogTwo[i], OUTPUT);
    //Set the three LED pins as outputs
  }
  setColor(ledAnalogOne, BLACK);
  //Turn off led 1
  setColor(ledAnalogTwo, BLACK);
  //Turn off led 2
}

void loop(){
  /* Example 1 - Defined Colors
  Set to a known color (you can use any of the above defined colors)*/
  setColor(ledAnalogOne, MAGENTA);
  /* Example 2 - Any Color
  Set the LED to any color you like*/
  //byte tempColor[] = {12,34,12};
  //the RGB (red, green, blue) value for a color to display
  //setColor(ledAnalogOne, tempColor);
  /*Example 3 - Fading
  Fade the LED between two colors (this will go from red to green to blue then back to red)*/
  //fadeToColor(ledAnalogOne, RED, GREEN, 10);
  //fadeToColor takes 4 parameters
  //ledAnalogOne - an array with 3 values defining the red, green and blue pins of the LED
  //RED - This is the start color
  //GREEN - This is the end color
  //10 - the delay (in milliseconds between updates) (determines the fade speed)
  //fadeToColor(ledAnalogOne, GREEN, BLUE, 10);
  //Fades from Green to Blue
  //fadeToColor(ledAnalogOne, BLUE, RED, 10);
  //Fades from Blue to Red
}

/* Sets the color of the LED to any RGB Value
led - (int array of three values defining the LEDs pins (led[0] = redPin, led[1] = greenPin, led[2] = bluePin))
color - (byte array of three values defing an RGB color to display (color[0] = new Red value, color[1] = new Green value, color[2] = new Red value*/
void setColor(int* led, byte* color){
  for(int i = 0; i < 3; i++){
    //iterate through each of the three pins (red green blue)
    analogWrite(led[i], 255 - color[i]);
  //set the analog output value of each pin to the input value (ie led[0] (red pin) to 255- color[0] (red input color)
  //we use 255 - the value because our RGB LED is common anode, this means a color is full on when we output analogWrite(pin, 0)
  //and off when we output analogWrite(pin, 255).
  }
}

/* A version of setColor that takes a predefined color
(neccesary to allow const int pre-defined colors */
void setColor(int* led, const byte* color){
  byte tempByte[] = {color[0], color[1], color[2]};
  setColor(led, tempByte);
}

/* Fades the LED from a start color to an end color at fadeSpeed
led - (int array of three values defining the LEDs pins (led[0] = redPin, led[1] = greenPin, led[2] = bluePin))
startColor - (byte array of three values defing the start RGB color (startColor[0] = start Red value, startColor[1] = start Green value, startColor[2] = start Red value
endColor - (byte array of three values defing the finished RGB color (endColor[0] = end Red value, endColor[1] = end Green value, endColor[2] = end Red value
fadeSpeed - this is the delay in milliseconds between steps, defines the speed of the fade*/
void fadeToColor(int* led, byte* startColor, byte* endColor, int fadeSpeed){
  int changeRed = endColor[0] - startColor[0];
  //the difference in the two colors for the red channel
  int changeGreen = endColor[1] - startColor[1];
  //the difference in the two colors for the green channel
  int changeBlue = endColor[2] - startColor[2];
  //the difference in the two colors for the blue channel
  int steps = max(abs(changeRed),max(abs(changeGreen), abs(changeBlue)));
  //make the number of change steps the maximum channel change
  for(int i = 0 ; i < steps; i++){
    //iterate for the channel with the maximum change
    byte newRed = startColor[0] + (i * changeRed / steps);
    //the newRed intensity dependant on the start intensity and the change determined above
    byte newGreen = startColor[1] + (i * changeGreen / steps);
    //the newGreen intensity
    byte newBlue = startColor[2] + (i * changeBlue / steps);
    //the newBlue intensity
    byte newColor[] = {newRed, newGreen, newBlue};
    //Define an RGB color array for the new color
    setColor(led, newColor);
    //Set the LED to the calculated value
    delay(fadeSpeed);
    //Delay fadeSpeed milliseconds before going on to the next color
  }
  setColor(led, endColor);
  //The LED should be at the endColor but set to endColor to avoid rounding errors}


/* A version of fadeToColor that takes predefined colors (necessary to allow const int pre-defined colors */
void fadeToColor(int* led, const byte* startColor, const byte* endColor, int fadeSpeed){
  byte tempByte1[] = {startColor[0], startColor[1], startColor[2]};
  byte tempByte2[] = {endColor[0], endColor[1], endColor[2]};
  fadeToColor(led, tempByte1, tempByte2, fadeSpeed);
}