//Written by Tony DiCola for Adafruit Industries.
//Adafruit invests time and resources providing this open source code,
//please support Adafruit and open-source hardware by purchasing products
//from Adafruit!
//BSD license, all text above must be included in any redistribution.

#include <Adafruit_NeoPixel.h>

#define PIXEL_PIN    3  // Pin connected to neo pixels
#define FIREPIN      4  // Fire button
#define PIXEL_COUNT  12  // Count of neo pixels

int buttonState = 0;

Adafruit_NeoPixel strip = Adafruit_NeoPixel(PIXEL_COUNT, PIXEL_PIN, NEO_GRB + NEO_KHZ800);

void setup() {
  strip.begin();
  strip.show();

  pinMode(FIREPIN, INPUT_PULLUP);

}

void loop() { 
  uint8_t  i;
  //Button switch
  buttonState = digitalRead(FIREPIN);

  // check if the pushbutton is pressed.
  // if it is, the buttonState is LOW:
  if (buttonState == LOW) {     
  // Run It:    

  // Nice flash and fade out over about 3/4 of a second:
  animate_gradient_fill(strip,         
                      255, 255, 255,
                      255, 0, 0,
                      150);
  // Then flash from purple to nothing over a longer period.
  animate_gradient_fill(strip,         
                      255, 0, 0,
                      20, 0, 0,
                      150);
  animate_gradient_fill(strip,         
                      20, 0, 0,
                      0, 0, 0,
                      150);
  } 
  
  else {
     strip.setPixelColor(i, 0,0,0); //Button not pressed, turn off pixels
     strip.show(); //Show no pixels
  }
 
  // More complex flash between two colors and fade out using multiple calls.
  // First flash from red to purple over a short period
  //animate_gradient_fill(strip,         // NeoPixel strip/loop/etc. object.
  //                      255, 128, 128, // Starting R,G,B color.
  //                      0, 0, 0,       // Ending R,G,B color (0,0,0 for black or off).
  //                      500);          // Total duration of the animation in milliseconds.
  //
  //animate_gradient_fill(strip,         
  //                    255, 0, 0,
  //                    128, 0, 255,
  //                    200);
  // Then flash from purple to nothing over a longer period.
  //animate_gradient_fill(strip,         
  //                      128, 0, 255,
  //                      0, 0, 0,
  //                      400);                  
  // Delay to see different animations.
  //delay(1000);
}

// Linear interpolation of y value given min/max x, min/max y, and x position.
float lerp(float x, float x0, float x1, float y0, float y1)
{
  // Clamp x within x0 and x1 bounds.
  x = x > x1 ? x1 : x;
  x = x < x0 ? x0 : x;
  // Calculate linear interpolation of y value.
  return y0 + (y1-y0)*((x-x0)/(x1-x0));
}

// Get the color of a pixel within a smooth gradient of two colors.
uint32_t color_gradient(uint8_t start_r, // Starting R,G,B color
                        uint8_t start_g,
                        uint8_t start_b, 
                        uint8_t end_r,   // Ending R,G,B color
                        uint8_t end_g,
                        uint8_t end_b,
                        float pos)       // Position along gradient, should be a value 0 to 1.0
{
  // Interpolate R,G,B values and return them as a color.  
  uint8_t red   = (uint8_t) lerp(pos, 0.0, 1.0, start_r, end_r);
  uint8_t green = (uint8_t) lerp(pos, 0.0, 1.0, start_g, end_g);
  uint8_t blue  = (uint8_t) lerp(pos, 0.0, 1.0, start_b, end_b);
  return Adafruit_NeoPixel::Color(red, green, blue);
}

// Set all pixels to the specified color.
void fill_pixels(Adafruit_NeoPixel& pixels, uint32_t color)
{
  for (int i=0; i < pixels.numPixels(); ++i) {
    pixels.setPixelColor(i, color);
  }
  strip.show();
}

void animate_gradient_fill(Adafruit_NeoPixel& pixels, // NeoPixel strip/loop/etc.
                           uint8_t start_r,           // Starting R,G,B color
                           uint8_t start_g,
                           uint8_t start_b, 
                           uint8_t end_r,             // Ending R,G,B color
                           uint8_t end_g,
                           uint8_t end_b,
                           int duration_ms)           // Total duration of animation, in milliseconds
{
  unsigned long start = millis();
  // Display start color.
  fill_pixels(pixels, Adafruit_NeoPixel::Color(start_r, start_g, start_b));
  // Main animation loop.
  unsigned long delta = millis() - start;
  while (delta < duration_ms) {
    // Calculate how far along we are in the duration as a position 0...1.0
    float pos = (float)delta / (float)duration_ms;
    // Get the gradient color and fill all the pixels with it.
    uint32_t color = color_gradient(start_r, start_g, start_b, end_r, end_g, end_b, pos);
    fill_pixels(pixels, color);
    // Update delta and repeat.
    delta = millis() - start;
  }
  // Display end color.
  fill_pixels(pixels, Adafruit_NeoPixel::Color(end_r, end_g, end_b));
}

//Written by Tony DiCola for Adafruit Industries.
//Adafruit invests time and resources providing this open source code,
//please support Adafruit and open-source hardware by purchasing products
//from Adafruit!
//BSD license, all text above must be included in any redistribution.

#include <Adafruit_NeoPixel.h>

#define PIXEL_PIN    3  // Pin connected to neo pixels
#define FIREPIN      4  // Fire button
#define PIXEL_COUNT  12  // Count of neo pixels

int buttonState = 0;

Adafruit_NeoPixel strip = Adafruit_NeoPixel(PIXEL_COUNT, PIXEL_PIN, NEO_GRB + NEO_KHZ800);

void setup() {
  strip.begin();
  strip.show();

  pinMode(FIREPIN, INPUT_PULLUP);

}

void loop() { 
  uint8_t  i;
  //Button switch
  buttonState = digitalRead(FIREPIN);

  // check if the pushbutton is pressed.
  // if it is, the buttonState is LOW:
  if (buttonState == LOW) {     
  // Run It:    

  // Nice flash and fade out over about 3/4 of a second:
  animate_gradient_fill(strip,         
                      255, 255, 255,
                      255, 0, 0,
                      150);
  // Then flash from purple to nothing over a longer period.
  animate_gradient_fill(strip,         
                      255, 0, 0,
                      20, 0, 0,
                      150);
  animate_gradient_fill(strip,         
                      20, 0, 0,
                      0, 0, 0,
                      150);
  } 
  
  else {
     strip.setPixelColor(i, 0,0,0); //Button not pressed, turn off pixels
     strip.show(); //Show no pixels
  }
 
  // More complex flash between two colors and fade out using multiple calls.
  // First flash from red to purple over a short period
  //animate_gradient_fill(strip,         // NeoPixel strip/loop/etc. object.
  //                      255, 128, 128, // Starting R,G,B color.
  //                      0, 0, 0,       // Ending R,G,B color (0,0,0 for black or off).
  //                      500);          // Total duration of the animation in milliseconds.
  //
  //animate_gradient_fill(strip,         
  //                    255, 0, 0,
  //                    128, 0, 255,
  //                    200);
  // Then flash from purple to nothing over a longer period.
  //animate_gradient_fill(strip,         
  //                      128, 0, 255,
  //                      0, 0, 0,
  //                      400);                  
  // Delay to see different animations.
  //delay(1000);
}

// Linear interpolation of y value given min/max x, min/max y, and x position.
float lerp(float x, float x0, float x1, float y0, float y1)
{
  // Clamp x within x0 and x1 bounds.
  x = x > x1 ? x1 : x;
  x = x < x0 ? x0 : x;
  // Calculate linear interpolation of y value.
  return y0 + (y1-y0)*((x-x0)/(x1-x0));
}

// Get the color of a pixel within a smooth gradient of two colors.
uint32_t color_gradient(uint8_t start_r, // Starting R,G,B color
                        uint8_t start_g,
                        uint8_t start_b, 
                        uint8_t end_r,   // Ending R,G,B color
                        uint8_t end_g,
                        uint8_t end_b,
                        float pos)       // Position along gradient, should be a value 0 to 1.0
{
  // Interpolate R,G,B values and return them as a color.  
  uint8_t red   = (uint8_t) lerp(pos, 0.0, 1.0, start_r, end_r);
  uint8_t green = (uint8_t) lerp(pos, 0.0, 1.0, start_g, end_g);
  uint8_t blue  = (uint8_t) lerp(pos, 0.0, 1.0, start_b, end_b);
  return Adafruit_NeoPixel::Color(red, green, blue);
}

// Set all pixels to the specified color.
void fill_pixels(Adafruit_NeoPixel& pixels, uint32_t color)
{
  for (int i=0; i < pixels.numPixels(); ++i) {
    pixels.setPixelColor(i, color);
  }
  strip.show();
}

void animate_gradient_fill(Adafruit_NeoPixel& pixels, // NeoPixel strip/loop/etc.
                           uint8_t start_r,           // Starting R,G,B color
                           uint8_t start_g,
                           uint8_t start_b, 
                           uint8_t end_r,             // Ending R,G,B color
                           uint8_t end_g,
                           uint8_t end_b,
                           int duration_ms)           // Total duration of animation, in milliseconds
{
  unsigned long start = millis();
  // Display start color.
  fill_pixels(pixels, Adafruit_NeoPixel::Color(start_r, start_g, start_b));
  // Main animation loop.
  unsigned long delta = millis() - start;
  while (delta < duration_ms) {
    // Calculate how far along we are in the duration as a position 0...1.0
    float pos = (float)delta / (float)duration_ms;
    // Get the gradient color and fill all the pixels with it.
    uint32_t color = color_gradient(start_r, start_g, start_b, end_r, end_g, end_b, pos);
    fill_pixels(pixels, color);
    // Update delta and repeat.
    delta = millis() - start;
  }
  // Display end color.
  fill_pixels(pixels, Adafruit_NeoPixel::Color(end_r, end_g, end_b));
}

// Original Kaleidoscope eyes code from Phillip Burgess. 
// Modified to play spinning animation when push button is set to low
//Written by Philip Burgess for Adafruit Industries.
//Adafruit invests time and resources providing this open source code,
//please support Adafruit and open-source hardware by purchasing products
//from Adafruit!
//BSD license, all text above must be included in any redistribution.

#include <Adafruit_NeoPixel.h>

#define PIN          0  //NeoPixel Pin
#define FIREPIN      2  // Fire button

int buttonState = 0; //Default button state

Adafruit_NeoPixel pixels = Adafruit_NeoPixel(12, PIN);


uint8_t         offset = 0;         // Position of spinny eyes
uint32_t color  = 0x00ff5a;  // HEX color here
uint32_t prevTime;

void setup() {
  pixels.begin();
  prevTime = millis();
  pinMode(FIREPIN, INPUT_PULLUP); //Button enabler
}

void loop() {
  uint8_t  i;
  uint32_t t;
  buttonState = digitalRead(FIREPIN); //Trigger button state
  if (buttonState == LOW) { // If button pressed
    for(i=0; i<16; i++) { //Run the animation
      uint32_t c = 0; //Blank color
      if(((offset + i) & 7) < 2) c = color; // 4 pixels on...
      pixels.setPixelColor(i, c); //Set the color of pixels
    }
    pixels.show();
    offset++;
  }

  t = millis();
  if((t - prevTime) > 10) {      // Every 10th of a second...
    
    for(i=0; i<32; i++) pixels.setPixelColor(i, 0);
    prevTime = t;
    }

  else {
    pixels.setPixelColor(i, 0,0,0); //Button not pressed, turn off pixels
    pixels.show(); //Show no pixels
    delay(25); //duration of spinniness
  }
}

// Original Kaleidoscope eyes code from Phillip Burgess. 
// Modified to play spinning animation when push button is set to low
//Written by Philip Burgess for Adafruit Industries.
//Adafruit invests time and resources providing this open source code,
//please support Adafruit and open-source hardware by purchasing products
//from Adafruit!
//BSD license, all text above must be included in any redistribution.

#include <Adafruit_NeoPixel.h>

#define PIN          0  //NeoPixel Pin
#define FIREPIN      2  // Fire button

int buttonState = 0; //Default button state

Adafruit_NeoPixel pixels = Adafruit_NeoPixel(12, PIN);


uint8_t         offset = 0;         // Position of spinny eyes
uint32_t color  = 0x00ff5a;  // HEX color here
uint32_t prevTime;

void setup() {
  pixels.begin();
  prevTime = millis();
  pinMode(FIREPIN, INPUT_PULLUP); //Button enabler
}

void loop() {
  uint8_t  i;
  uint32_t t;
  buttonState = digitalRead(FIREPIN); //Trigger button state
  if (buttonState == LOW) { // If button pressed
    for(i=0; i<16; i++) { //Run the animation
      uint32_t c = 0; //Blank color
      if(((offset + i) & 7) < 2) c = color; // 4 pixels on...
      pixels.setPixelColor(i, c); //Set the color of pixels
    }
    pixels.show();
    offset++;
  }

  t = millis();
  if((t - prevTime) > 10) {      // Every 10th of a second...
    
    for(i=0; i<32; i++) pixels.setPixelColor(i, 0);
    prevTime = t;
    }

  else {
    pixels.setPixelColor(i, 0,0,0); //Button not pressed, turn off pixels
    pixels.show(); //Show no pixels
    delay(25); //duration of spinniness
  }
}